Merge branch 'pure' of https://github.com/Z3Prover/z3

Conflicts:
	src/api/ml/z3.ml
	src/api/ml/z3.mli
	src/api/python/z3util.py

.gitignore

@@ -19,6 +19,7 @@ ocamlz3
 # Emacs temp files
 \#*\#
 # Directories with generated code and documentation
+release/*
 build/*
 build-dist/*
 dist/*

doc/mk_api_doc.py

@@ -1,3 +1,5 @@
+# Copyright (c) Microsoft Corporation 2015
+
 import os
 import shutil
 import re

examples/c++/example.cpp

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #include<vector>
 #include"z3++.h"
 
@@ -205,6 +211,9 @@ void bitvector_example1() {
 
     // using unsigned <=
     prove(ule(x - 10, 0) == ule(x, 10));
+
+    expr y = c.bv_const("y", 32);
+    prove(implies(concat(x, y) == concat(y, x), x == y));
 }
 
 /**
@@ -977,6 +986,30 @@ void substitute_example() {
     std::cout << new_f << std::endl;
 }
 
+void opt_example() {
+    context c;
+    optimize opt(c);
+    params p(c);
+    p.set("priority",c.str_symbol("pareto"));
+    opt.set(p);
+    expr x = c.int_const("x");
+    expr y = c.int_const("y");
+    opt.add(10 >= x && x >= 0);
+    opt.add(10 >= y && y >= 0);
+    opt.add(x + y <= 11);
+    optimize::handle h1 = opt.maximize(x);
+    optimize::handle h2 = opt.maximize(y);
+    check_result r = sat;
+    while (true) {
+        if (sat == opt.check()) {
+            std::cout << x << ": " << opt.lower(h1) << " " << y << ": " << opt.lower(h2) << "\n";
+        }
+        else {
+            break;
+        }
+    }
+}
+
 void extract_example() {
     std::cout << "extract example\n";
     context c;
@@ -1025,6 +1058,7 @@ int main() {
         expr_vector_example(); std::cout << "\n";
         exists_expr_vector_example(); std::cout << "\n";
         substitute_example(); std::cout << "\n";
+        opt_example(); std::cout << "\n";
         extract_example(); std::cout << "\n";
         std::cout << "done\n";
     }

examples/c/test_capi.c

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #include<stdio.h>
 #include<stdlib.h>
 #include<stdarg.h>

examples/dotnet/Program.cs

@@ -759,7 +759,7 @@ namespace test_mapi
             foreach (BoolExpr a in g.Formulas)
                 solver.Assert(a);
 
-            if (solver.Check() != Status.SATISFIABLE)
+            if (solver.Check() != Status.SATISFIABLE) 
                 throw new TestFailedException();
 
             ApplyResult ar = ApplyTactic(ctx, ctx.MkTactic("simplify"), g);
@@ -2159,6 +2159,7 @@ namespace test_mapi
                 Console.Write("Z3 Full Version: ");
                 Console.WriteLine(Microsoft.Z3.Version.ToString());
 
+
                 SimpleExample();
 
                 // These examples need model generation turned on.

examples/interp/iz3.cpp

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <iostream>

examples/java/JavaExample.java

@@ -2254,7 +2254,30 @@ class JavaExample
 
         System.out.println("OK, model: " + s.getModel().toString());        
     }
-    
+
+    public void optimizeExample(Context ctx) 
+    {
+        System.out.println("Opt");
+
+        Optimize opt = ctx.mkOptimize();
+
+        // Set constraints.
+        IntExpr xExp = ctx.mkIntConst("x");
+        IntExpr yExp = ctx.mkIntConst("y");
+
+        opt.Add(ctx.mkEq(ctx.mkAdd(xExp, yExp), ctx.mkInt(10)),
+                ctx.mkGe(xExp, ctx.mkInt(0)),
+                ctx.mkGe(yExp, ctx.mkInt(0)));
+
+        // Set objectives.
+        Optimize.Handle mx = opt.MkMaximize(xExp);
+        Optimize.Handle my = opt.MkMaximize(yExp);
+
+        System.out.println(opt.Check()); 
+        System.out.println(mx);
+        System.out.println(my);
+    }
+
     public static void main(String[] args)
     {
         JavaExample p = new JavaExample();
@@ -2274,6 +2297,8 @@ class JavaExample
                 HashMap<String, String> cfg = new HashMap<String, String>();
                 cfg.put("model", "true");
                 Context ctx = new Context(cfg);
+		
+		p.optimizeExample(ctx);
                 p.basicTests(ctx);
                 p.castingTest(ctx);
                 p.sudokuExample(ctx);

examples/maxsat/maxsat.c

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 /*
   Simple MAXSAT solver on top of the Z3 API.
 */

examples/msf/README

@@ -0,0 +1,20 @@
+In order to use Z3 MSF plugin, follow the following steps:
+1. Compile latest Z3 .NET API (from any branch consisting of opt features) and copy 'libz3.dll' and 'Microsoft.Z3.dll' to the folder of 'Z3MSFPlugin.sln'.
+2. Retrieve 'Microsoft.Solver.Foundation.dll' from http://archive.msdn.microsoft.com/solverfoundation/Release/ProjectReleases.aspx?ReleaseId=1799,
+   preferably using DLL only version. Copy 'Microsoft.Solver.Foundation.dll' to the folder of 'Z3MSFPlugin.sln'
+3. Build 'Z3MSFPlugin.sln'. Note that you have to compile using x86 target for Microsoft.Z3.dll 32-bit and x64 target for Microsoft.Z3.dll 64-bit.
+
+The solution consists of a plugin project, a test project with a few simple test cases and a command line projects for external OML, MPS and SMPS models.
+To retrieve SMT2 models which are native to Z3, set the logging file in corresponding directives or solver params e.g.
+
+   var p = new Z3MILPParams();
+   p.SMT2LogFile = "model.smt2";
+
+For more details, check out the commands in 'Validator\Program.cs'.
+
+Enjoy!
+
+
+ 
+ 
+   

examples/msf/SolverFoundation.Plugin.Z3.Tests/App.config

@@ -0,0 +1,60 @@
+<?xml version="1.0"?>
+<configuration>
+  <configSections>
+    <section name="MsfConfig" 
+             type="Microsoft.SolverFoundation.Services.MsfConfigSection, Microsoft.Solver.Foundation" 
+             allowLocation="true" 
+             allowDefinition="Everywhere" 
+             allowExeDefinition="MachineToApplication" 
+             restartOnExternalChanges="true" 
+             requirePermission="true"/>
+  </configSections>
+  <MsfConfig>
+    <MsfPluginSolvers>      
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="LP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="LP"                        
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="MINLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="NLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+    </MsfPluginSolvers>
+  </MsfConfig>
+<startup>
+  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
+</startup>
+</configuration>

examples/msf/SolverFoundation.Plugin.Z3.Tests/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("SolverFoundation.Plugin.Z3.Tests")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("SolverFoundation.Plugin.Z3.Tests")]
+[assembly: AssemblyCopyright("Copyright ©  2013")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("27657eee-ca7b-4996-a905-86a3f4584988")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

examples/msf/SolverFoundation.Plugin.Z3.Tests/ServiceTests.cs

@@ -0,0 +1,92 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Solvers;
+using Microsoft.SolverFoundation.Services;
+using Microsoft.SolverFoundation.Plugin.Z3;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3.Tests
+{
+    [TestClass]
+    public class ServiceTests
+    {
+        [TestInitialize]
+        public void SetUp()
+        {
+            SolverContext context = SolverContext.GetContext();
+            context.ClearModel();
+        }
+
+        private void TestService1(Directive directive)
+        {
+            SolverContext context = SolverContext.GetContext();
+            Model model = context.CreateModel();
+
+            Decision x1 = new Decision(Domain.RealRange(0, 2), "x1");
+            Decision x2 = new Decision(Domain.RealRange(0, 2), "x2");
+
+            Decision z = new Decision(Domain.IntegerRange(0, 1), "z");
+
+            model.AddDecisions(x1, x2, z);
+
+            model.AddConstraint("Row0", x1 - z <= 1);
+            model.AddConstraint("Row1", x2 + z <= 2);
+
+            Goal goal = model.AddGoal("Goal0", GoalKind.Maximize, x1 + x2);
+
+            Solution solution = context.Solve(directive);
+            Assert.IsTrue(goal.ToInt32() == 3);
+            context.ClearModel();
+        }
+
+        private void TestService2(Directive directive)
+        {
+            SolverContext context = SolverContext.GetContext();
+            Model model = context.CreateModel();
+
+            Decision x1 = new Decision(Domain.RealNonnegative, "x1");
+            Decision x2 = new Decision(Domain.RealNonnegative, "x2");
+
+            Decision z = new Decision(Domain.IntegerRange(0, 1), "z");
+
+            Rational M = 100;
+            
+            model.AddDecisions(x1, x2, z);
+
+            model.AddConstraint("Row0", x1 + x2 >= 1);
+            model.AddConstraint("Row1", x1 - z * 100 <= 0);
+            model.AddConstraint("Row2", x2 + z * 100 <= 100);
+
+            Goal goal = model.AddGoal("Goal0", GoalKind.Maximize, x1 + x2);
+
+            Solution solution = context.Solve(directive);
+            Assert.IsTrue(goal.ToInt32() == 100);
+            context.ClearModel();
+        }
+
+        [TestMethod]
+        public void TestService1()
+        {
+            TestService1(new Z3MILPDirective());
+            TestService1(new Z3TermDirective());
+        }
+
+        [TestMethod]
+        public void TestService2()
+        {
+            TestService2(new Z3MILPDirective());
+            TestService2(new Z3TermDirective());
+        }
+
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3.Tests/SolverFoundation.Plugin.Z3.Tests.csproj

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{280AEE2F-1FDB-4A27-BE37-14DC154C873B}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Microsoft.SolverFoundation.Plugin.Z3.Tests</RootNamespace>
+    <AssemblyName>SolverFoundation.Plugin.Z3.Tests</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <PlatformTarget>x86</PlatformTarget>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <PlatformTarget>x86</PlatformTarget>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Solver.Foundation">
+      <HintPath>..\Microsoft.Solver.Foundation.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="ServiceTests.cs" />
+    <Compile Include="SolverTests.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SolverFoundation.Plugin.Z3\SolverFoundation.Plugin.Z3.csproj">
+      <Project>{7340e664-f648-4ff7-89b2-f4da424996d3}</Project>
+      <Name>SolverFoundation.Plugin.Z3</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

examples/msf/SolverFoundation.Plugin.Z3.Tests/SolverTests.cs

@@ -0,0 +1,138 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Solvers;
+using Microsoft.SolverFoundation.Services;
+using Microsoft.SolverFoundation.Plugin.Z3;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3.Tests
+{
+    [TestClass]
+    public class SolverTests
+    {
+        [TestMethod]
+        public void TestMILPSolver1()
+        {
+            var solver = new Z3MILPSolver();
+            int goal;
+
+            solver.AddRow("goal", out goal);
+            int x1, x2, z;
+
+            // 0 <= x1 <= 2
+            solver.AddVariable("x1", out x1);
+            solver.SetBounds(x1, 0, 2);
+
+            // 0 <= x2 <= 2
+            solver.AddVariable("x2", out x2);
+            solver.SetBounds(x2, 0, 2);
+
+            // z is an integer in [0,1]
+            solver.AddVariable("z", out z);
+            solver.SetIntegrality(z, true);
+            solver.SetBounds(z, 0, 1);
+
+            //max x1 + x2 
+            solver.SetCoefficient(goal, x1, 1);
+            solver.SetCoefficient(goal, x2, 1);
+            solver.AddGoal(goal, 1, false);
+
+            // 0 <= x1 -z <= 1 
+            int row1;
+            solver.AddRow("rowI1", out row1);
+            solver.SetBounds(row1, 0, 1);
+            solver.SetCoefficient(row1, x1, 1);
+            solver.SetCoefficient(row1, z, -1);
+
+            // 0 <= x2 + z <= 2
+            int row2;
+            solver.AddRow("rowI2", out row2);
+            solver.SetBounds(row2, 0, 2);
+            solver.SetCoefficient(row2, x2, 1);
+            solver.SetCoefficient(row2, z, 1);
+
+            var p = new Z3MILPParams();
+            solver.Solve(p);
+
+            Assert.IsTrue(solver.Result == LinearResult.Optimal);
+            Assert.AreEqual(solver.GetValue(x1), 2 * Rational.One);
+            Assert.AreEqual(solver.GetValue(x2), Rational.One);
+            Assert.AreEqual(solver.GetValue(z), Rational.One);
+            Assert.AreEqual(solver.GetValue(goal), 3 * Rational.One);
+        }
+
+        [TestMethod]
+        public void TestMILPSolver2()
+        {
+            var solver = new Z3MILPSolver();
+            int goal, extraGoal;
+
+            Rational M = 100;
+            solver.AddRow("goal", out goal);
+            int x1, x2, z;
+
+            // 0 <= x1 <= 100
+            solver.AddVariable("x1", out x1);
+            solver.SetBounds(x1, 0, M);
+
+            // 0 <= x2 <= 100
+            solver.AddVariable("x2", out x2);
+            solver.SetBounds(x2, 0, M);
+
+            // z is an integer in [0,1]
+            solver.AddVariable("z", out z);
+            solver.SetIntegrality(z, true);
+            solver.SetBounds(z, 0, 1);
+
+            solver.SetCoefficient(goal, x1, 1);
+            solver.SetCoefficient(goal, x2, 2);
+            solver.AddGoal(goal, 1, false);
+
+            solver.AddRow("extraGoal", out extraGoal);
+
+            solver.SetCoefficient(extraGoal, x1, 2);
+            solver.SetCoefficient(extraGoal, x2, 1);
+            solver.AddGoal(extraGoal, 2, false);
+
+            // x1 + x2 >= 1
+            int row;
+            solver.AddRow("row", out row);
+            solver.SetBounds(row, 1, Rational.PositiveInfinity);
+            solver.SetCoefficient(row, x1, 1);
+            solver.SetCoefficient(row, x2, 1);
+
+
+            // x1 - M*z <= 0
+            int row1;
+            solver.AddRow("rowI1", out row1);
+            solver.SetBounds(row1, Rational.NegativeInfinity, 0);
+            solver.SetCoefficient(row1, x1, 1);
+            solver.SetCoefficient(row1, z, -M);
+
+            // x2 - M* (1-z) <= 0
+            int row2;
+            solver.AddRow("rowI2", out row2);
+            solver.SetBounds(row2, Rational.NegativeInfinity, M);
+            solver.SetCoefficient(row2, x2, 1);
+            solver.SetCoefficient(row2, z, M);
+
+            var p = new Z3MILPParams();
+            p.OptKind = OptimizationKind.BoundingBox;
+
+            solver.Solve(p);
+            Assert.IsTrue(solver.Result == LinearResult.Optimal);
+            Assert.AreEqual(solver.GetValue(goal), 200 * Rational.One);
+            Assert.AreEqual(solver.GetValue(extraGoal), 200 * Rational.One);
+        }
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/AbortWorker.cs

@@ -0,0 +1,98 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using Microsoft.Z3;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    /// <summary>
+    /// Thread that will wait until the query abort function returns true or 
+    /// the stop method is called. If the abort function returns true at some
+    /// point it will issue a softCancel() call to Z3.
+    /// </summary>
+    internal class AbortWorker
+    {
+        #region Private Members
+
+        /// <summary>The Z3 solver</summary>
+        private Microsoft.Z3.Context _context;
+        /// <summary>The abort function to use to check if we are aborted</summary>
+        private Func<bool> _QueryAbortFunction;
+        /// <summary>Flag indicating that worker should stop</summary>
+        private bool _stop = false;
+        /// <summary>Flag indicating that we have been sent an abort signal</summary>
+        private bool _aborted = false;
+
+        #endregion Private Members
+
+        #region Construction
+
+        /// <summary>
+        /// Worker constructor taking a Z3 instance and a function to periodically
+        /// check for aborts.
+        /// </summary>
+        /// <param name="z3">Z3 instance</param>
+        /// <param name="queryAbortFunction">method to call to check for aborts</param>
+        public AbortWorker(Context context, Func<bool> queryAbortFunction)
+        {
+            _context = context;
+            _QueryAbortFunction = queryAbortFunction;
+        }
+
+        #endregion Construction
+
+        #region Public Methods
+
+        /// <summary>
+        /// Stop the abort worker.
+        /// </summary>
+        public void Stop()
+        {
+            _stop = true;
+        }
+
+        /// <summary>
+        /// Is true if we have been aborted.
+        /// </summary>
+        public bool Aborted
+        {
+            get
+            {
+                return _aborted;
+            }
+        }
+
+        /// <summary>
+        /// Starts the abort worker. The worker checks the abort method
+        /// periodically until either it is stopped by a call to the Stop()
+        /// method or it gets an abort signal. In the latter case it will
+        /// issue a soft abort signal to Z3.
+        /// </summary>
+        public void Start()
+        {
+            // We go until someone stops us
+            _stop = false;
+            while (!_stop && !_QueryAbortFunction())
+            {
+                // Wait for a while
+                Thread.Sleep(10);
+            }
+            // If we were stopped on abort, cancel z3
+            if (!_stop)
+            {
+                _context.Interrupt();
+                _aborted = true;
+            }
+        }
+
+        #endregion Public Methods
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/App.config

@@ -0,0 +1,60 @@
+<?xml version="1.0"?>
+<configuration>
+  <configSections>
+    <section name="MsfConfig" 
+             type="Microsoft.SolverFoundation.Services.MsfConfigSection, Microsoft.Solver.Foundation" 
+             allowLocation="true" 
+             allowDefinition="Everywhere" 
+             allowExeDefinition="MachineToApplication" 
+             restartOnExternalChanges="true" 
+             requirePermission="true"/>
+  </configSections>
+  <MsfConfig>
+    <MsfPluginSolvers>      
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="LP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="LP"                        
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="MINLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="NLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+    </MsfPluginSolvers>
+  </MsfConfig>
+<startup>
+  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
+</startup>
+</configuration>

examples/msf/SolverFoundation.Plugin.Z3/SolverFoundation.Plugin.Z3.csproj

@@ -0,0 +1,149 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>9.0.30729</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{7340E664-F648-4FF7-89B2-F4DA424996D3}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Microsoft.SolverFoundation.Plugin.Z3</RootNamespace>
+    <AssemblyName>SolverFoundation.Plugin.Z3</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <SignAssembly>false</SignAssembly>
+    <AssemblyOriginatorKeyFile>
+    </AssemblyOriginatorKeyFile>
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'commercial|AnyCPU'">
+    <OutputPath>bin\commercial\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'commercial_64|AnyCPU'">
+    <OutputPath>bin\commercial_64\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x86\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
+    <OutputPath>bin\x86\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'commercial|x86'">
+    <OutputPath>bin\x86\commercial\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'commercial_64|x86'">
+    <OutputPath>bin\x86\commercial_64\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Solver.Foundation">
+      <HintPath>..\Microsoft.Solver.Foundation.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Z3, Version=4.3.2.0, Culture=neutral, processorArchitecture=x86">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\Microsoft.Z3.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core">
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Xml.Linq">
+    </Reference>
+    <Reference Include="System.Data.DataSetExtensions">
+    </Reference>
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="AbortWorker.cs" />
+    <Compile Include="Utils.cs" />
+    <Compile Include="Z3BaseDirective.cs" />
+    <Compile Include="Z3BaseParams.cs" />
+    <Compile Include="Z3BaseSolver.cs" />
+    <Compile Include="Z3MILPDirective.cs" />
+    <Compile Include="Z3MILPParams.cs" />
+    <Compile Include="Z3MILPSolver.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Z3TermDirective.cs" />
+    <Compile Include="Z3TermParams.cs" />
+    <Compile Include="Z3TermSolver.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

examples/msf/SolverFoundation.Plugin.Z3/Utils.cs

@@ -0,0 +1,130 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Diagnostics;
+using Microsoft.Z3;
+using Microsoft.SolverFoundation.Common;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    public class Utils
+    {
+        /// <summary>
+        /// Returns the Z3 term corresponding to the MSF rational number.
+        /// </summary>
+        /// <param name="rational">The MSF rational</param>
+        /// <returns>The Z3 term</returns>
+        public static ArithExpr GetNumeral(Context context, Rational rational, Sort sort = null)
+        {
+            try
+            {
+                sort = rational.IsInteger() ? ((Sort)context.IntSort) : (sort == null ? (Sort)context.RealSort : sort);
+                return (ArithExpr)context.MkNumeral(rational.ToString(), sort);                
+            }
+            catch (Z3Exception e)
+            {
+                Console.Error.WriteLine("Conversion of {0} failed:\n {1}", rational, e);
+                throw new NotSupportedException();
+            }
+        }
+
+        private static long BASE = 10 ^ 18;
+
+        private static Rational ToRational(System.Numerics.BigInteger bi)
+        {
+            if (System.Numerics.BigInteger.Abs(bi) <= BASE) 
+            {
+                return (Rational)((long)bi);
+            }
+            return BASE * ToRational(bi / BASE) + ToRational(bi % BASE);
+        }
+
+        public static Rational ToRational(IntNum i)
+        {
+            return ToRational(i.BigInteger);
+        }
+
+        public static Rational ToRational(RatNum r)
+        {
+            return ToRational(r.BigIntNumerator) / ToRational(r.BigIntDenominator);
+        }
+
+        public static Rational ToRational(Expr expr)
+        {
+            Debug.Assert(expr is ArithExpr, "Only accept ArithExpr for now.");
+            var e = expr as ArithExpr;
+
+            if (e is IntNum) 
+            {
+                Debug.Assert(expr.IsIntNum, "Number should be an integer.");
+                return ToRational(expr as IntNum);
+            }
+            
+            if (e is RatNum)
+            {
+                Debug.Assert(expr.IsRatNum, "Number should be a rational.");
+                return ToRational(expr as RatNum);
+            }
+            
+            if (e.IsAdd)
+            {
+                Rational r = Rational.Zero;
+                foreach (var arg in e.Args)
+                {
+                    r += ToRational(arg);
+                }
+                return r;
+            }
+            
+            if (e.IsMul)
+            {
+                Rational r = Rational.One;
+                foreach (var arg in e.Args)
+                {
+                    r *= ToRational(arg);
+                }
+                return r;
+            }
+            
+            if (e.IsUMinus)
+            {
+                return -ToRational(e.Args[0]);
+            }
+            
+            if (e.IsDiv)
+            {
+                return ToRational(e.Args[0]) / ToRational(e.Args[1]);
+            }
+            
+            if (e.IsSub)
+            {
+                Rational r = ToRational(e.Args[0]);
+                for (int i = 1; i < e.Args.Length; ++i)
+                {
+                    r -= ToRational(e.Args[i]);
+                }
+                return r;
+            }
+            
+            if (e.IsConst && e.FuncDecl.Name.ToString() == "oo")
+            {
+                return Rational.PositiveInfinity;
+            }
+            
+            if (e.IsConst && e.FuncDecl.Name.ToString() == "epsilon")
+            {
+                return Rational.One/Rational.PositiveInfinity;              
+            }
+
+            Debug.Assert(false, "Should not happen");
+            return Rational.One;
+        }
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3BaseDirective.cs

@@ -0,0 +1,107 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Text;
+using Microsoft.SolverFoundation.Services;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    /// <summary>
+    /// Combining objective functions
+    /// </summary>
+    public enum OptimizationKind
+    {
+        Lexicographic,
+        BoundingBox,
+        ParetoOptimal
+    };
+
+    /// <summary>
+    /// Algorithm for solving cardinality constraints
+    /// </summary>
+    public enum CardinalityAlgorithm
+    { 
+        FuMalik,
+        CoreMaxSAT
+    }
+
+    /// <summary>
+    /// Algorithm for solving pseudo-boolean constraints
+    /// </summary>
+    public enum PseudoBooleanAlgorithm
+    { 
+        WeightedMaxSAT,
+        IterativeWeightedMaxSAT,
+        BisectionWeightedMaxSAT,
+        WeightedPartialMaxSAT2
+    }
+
+    /// <summary>
+    /// Strategy for solving arithmetic optimization
+    /// </summary>
+    public enum ArithmeticStrategy
+    { 
+        Basic,
+        Farkas
+    }
+
+    public abstract class Z3BaseDirective : Directive
+    {
+        protected OptimizationKind _optKind;
+        protected CardinalityAlgorithm _cardAlgorithm;
+        protected PseudoBooleanAlgorithm _pboAlgorithm;
+        protected ArithmeticStrategy _arithStrategy;
+
+        protected string _smt2LogFile;
+
+        public Z3BaseDirective()
+        {
+            Arithmetic = Arithmetic.Exact;
+        }
+
+        public OptimizationKind OptKind
+        {
+            get { return _optKind; }
+            set { _optKind = value; }
+        }
+
+        public CardinalityAlgorithm CardinalityAlgorithm
+        {
+            get { return _cardAlgorithm; }
+            set { _cardAlgorithm = value; }
+        }
+
+        public PseudoBooleanAlgorithm PseudoBooleanAlgorithm
+        {
+            get { return _pboAlgorithm; }
+            set { _pboAlgorithm = value; }
+        }
+
+        public ArithmeticStrategy ArithmeticStrategy
+        {
+            get { return _arithStrategy; }
+            set { _arithStrategy = value; }
+        }
+
+        public string SMT2LogFile
+        {
+            get { return _smt2LogFile; }
+            set { _smt2LogFile = value; }
+        }
+
+        public override string ToString() 
+        {
+            var sb = new StringBuilder();
+            sb.Append(this.GetType().Name);
+            sb.Append("(");
+            sb.AppendFormat("OptKind: {0}, ", _optKind);
+            sb.AppendFormat("SMT2LogFile: {0}", _smt2LogFile);
+            sb.Append(")");
+            return sb.ToString();
+        }
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3BaseParams.cs

@@ -0,0 +1,109 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using Microsoft.SolverFoundation.Services;
+using System;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    /// <summary>
+    /// Implementation of the solver parameters for Z3
+    /// </summary>
+    public class Z3BaseParams : ISolverParameters
+    {
+        #region Private Members
+
+        /// <summary>The abort method we can call (defaults to always false) 
+        protected Func<bool> _queryAbortFunction = delegate() { return false; };
+
+        /// <summary>The directive to use</summary>
+        protected Directive _directive = null;
+
+        protected OptimizationKind _optKind;
+        protected CardinalityAlgorithm _cardAlgorithm;
+        protected PseudoBooleanAlgorithm _pboAlgorithm;
+        protected ArithmeticStrategy _arithStrategy;
+
+        protected string _smt2LogFile;
+
+        #endregion Private Members
+
+        #region Construction
+
+        public Z3BaseParams() { }
+
+        public Z3BaseParams(Directive directive)
+        {
+            _directive = directive;
+
+            var z3Directive = directive as Z3BaseDirective;
+            if (z3Directive != null)
+            {
+                _optKind = z3Directive.OptKind;
+                _cardAlgorithm = z3Directive.CardinalityAlgorithm;
+                _pboAlgorithm = z3Directive.PseudoBooleanAlgorithm;
+                _arithStrategy = z3Directive.ArithmeticStrategy;
+                _smt2LogFile = z3Directive.SMT2LogFile;
+            }
+        }
+
+        public Z3BaseParams(Func<bool> queryAbortFunction)
+        {
+            _queryAbortFunction = queryAbortFunction;
+        }
+
+        public Z3BaseParams(Z3BaseParams z3Parameters)
+        {
+            _queryAbortFunction = z3Parameters._queryAbortFunction;
+        }
+
+        #endregion Construction
+
+        #region ISolverParameters Members
+
+        /// <summary>
+        /// Getter for the abort method
+        /// </summary>
+        public Func<bool> QueryAbort
+        {
+            get { return _queryAbortFunction; }
+            set { _queryAbortFunction = value; }
+        }
+
+        public OptimizationKind OptKind
+        {
+            get { return _optKind; }
+            set { _optKind = value; }
+        }
+
+        public CardinalityAlgorithm CardinalityAlgorithm
+        {
+            get { return _cardAlgorithm; }
+            set { _cardAlgorithm = value; }
+        }
+
+        public PseudoBooleanAlgorithm PseudoBooleanAlgorithm
+        {
+            get { return _pboAlgorithm; }
+            set { _pboAlgorithm = value; }
+        }
+
+        public ArithmeticStrategy ArithmeticStrategy
+        {
+            get { return _arithStrategy; }
+            set { _arithStrategy = value; }
+        }
+
+        public string SMT2LogFile
+        {
+            get { return _smt2LogFile; }
+            set { _smt2LogFile = value; }
+        }
+
+        #endregion
+    }
+
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3BaseSolver.cs

@@ -0,0 +1,387 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Diagnostics;
+using Microsoft.Z3;
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Services;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    internal enum Z3Result
+    {
+        Optimal,
+        LocalOptimal,
+        Feasible,
+        Interrupted,
+        Infeasible
+    }
+
+    /// <summary>
+    /// The basic solver class to take care of transformation from an MSF instance to an Z3 instance
+    /// </summary>
+    internal class Z3BaseSolver
+    {
+        /// <summary>Representing MSF model</summary>
+        private IRowVariableModel _model;
+
+        /// <summary>The Z3 solver we are currently using</summary>
+        private Context _context = null;
+
+        /// <summary>Default optimization solver</summary>
+        private Optimize _optSolver = null;
+
+        /// <summary>Marks when we are inside the Solve() method</summary>
+        private bool _isSolving = false;
+
+        /// <summary>A map from MSF variable ids to Z3 variables</summary>
+        private Dictionary<int, Expr> _variables = new Dictionary<int, Expr>();
+
+        /// <summary>A map from MSF variable ids to Z3 goal ids</summary>
+        private Dictionary<IGoal, uint> _goals = new Dictionary<IGoal, uint>();
+
+        internal Z3BaseSolver(IRowVariableModel model)
+        {
+            _model = model;
+        }
+
+        internal Context Context 
+        { 
+            get { return _context; }
+        }
+
+        internal Dictionary<int, Expr> Variables
+        {
+            get { return _variables; }
+        }
+
+        internal Dictionary<IGoal, uint> Goals
+        {
+            get { return _goals; }
+        }
+
+        /// <summary>
+        /// Destructs a currently active Z3 solver and the associated data.
+        /// </summary>
+        internal void DestructSolver(bool checkInSolve)
+        {
+            if (_context != null)
+            {
+                if (checkInSolve && !_isSolving)
+                {
+                    _variables.Clear();
+                    if (!_isSolving)
+                    {
+                        _optSolver.Dispose();
+                        _context.Dispose();
+                    }
+                }
+                else
+                {
+                    Console.Error.WriteLine("Z3 destruction is invoked while in Solving phase.");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Constructs a Z3 solver to be used.
+        /// </summary>
+        internal void ConstructSolver(Z3BaseParams parameters)
+        {
+            // If Z3 is there already, kill it
+            if (_context != null)
+            {
+                DestructSolver(false);
+            }
+
+            _context = new Context();
+            _optSolver = _context.MkOptimize();
+            var p = _context.MkParams();
+
+            switch (parameters.OptKind)
+            {
+                case OptimizationKind.BoundingBox:
+                    p.Add("priority", _context.MkSymbol("box"));
+                    break;
+                case OptimizationKind.Lexicographic:
+                    p.Add("priority", _context.MkSymbol("lex"));
+                    break;
+                case OptimizationKind.ParetoOptimal:
+                    p.Add("priority", _context.MkSymbol("pareto"));
+                    break;
+                default:
+                    Debug.Assert(false, String.Format("Unknown optimization option {0}", parameters.OptKind));
+                    break;
+            }
+
+            switch (parameters.CardinalityAlgorithm)
+            {
+                case CardinalityAlgorithm.FuMalik:
+                    p.Add("maxsat_engine", _context.MkSymbol("fu_malik"));
+                    break;
+                case CardinalityAlgorithm.CoreMaxSAT:
+                    p.Add("maxsat_engine", _context.MkSymbol("core_maxsat"));
+                    break;
+                default:
+                    Debug.Assert(false, String.Format("Unknown cardinality algorithm option {0}", parameters.CardinalityAlgorithm));
+                    break;
+            }
+
+            switch (parameters.PseudoBooleanAlgorithm)
+            {
+                case PseudoBooleanAlgorithm.WeightedMaxSAT:
+                    p.Add("wmaxsat_engine", _context.MkSymbol("wmax"));
+                    break;
+                case PseudoBooleanAlgorithm.IterativeWeightedMaxSAT:
+                    p.Add("wmaxsat_engine", _context.MkSymbol("iwmax"));
+                    break;
+                case PseudoBooleanAlgorithm.BisectionWeightedMaxSAT:
+                    p.Add("wmaxsat_engine", _context.MkSymbol("bwmax"));
+                    break;
+                case PseudoBooleanAlgorithm.WeightedPartialMaxSAT2:
+                    p.Add("wmaxsat_engine", _context.MkSymbol("wpm2"));
+                    break;
+                default:
+                    Debug.Assert(false, String.Format("Unknown pseudo-boolean algorithm option {0}", parameters.PseudoBooleanAlgorithm));
+                    break;
+            }
+
+            switch (parameters.ArithmeticStrategy)
+            {
+                case ArithmeticStrategy.Basic:
+                    p.Add("engine", _context.MkSymbol("basic"));
+                    break;
+                case ArithmeticStrategy.Farkas:
+                    p.Add("engine", _context.MkSymbol("farkas"));
+                    break;
+                default:
+                    Debug.Assert(false, String.Format("Unknown arithmetic strategy option {0}", parameters.ArithmeticStrategy));
+                    break;
+            }
+
+            _optSolver.Parameters = p;
+        }
+
+        internal ArithExpr GetVariable(int vid)
+        {
+            Expr variable;
+            if (!_variables.TryGetValue(vid, out variable))
+            {
+                AddVariable(vid);
+                variable = _variables[vid];
+            }
+            return (ArithExpr)variable;
+        }
+
+        internal void AssertBool(BoolExpr row)
+        {
+            _optSolver.Assert(row);
+        }
+
+        internal void AssertArith(int vid, ArithExpr variable)
+        {
+            // Get the bounds on the row
+            Rational lower, upper;
+            _model.GetBounds(vid, out lower, out upper);
+
+            // Case of equality
+            if (lower == upper)
+            {
+                // Create the equality term
+                Expr eqConst = GetNumeral(lower, variable.Sort);
+                BoolExpr constraint = _context.MkEq(eqConst, variable);
+                // Assert the constraint
+                _optSolver.Assert(constraint);
+            }
+            else
+            {
+                // If upper bound is finite assert the upper bound constraint
+                if (lower.IsFinite)
+                {
+                    // Create the lower Bound constraint
+                    ArithExpr lowerTerm = GetNumeral(lower, variable.Sort);
+                    BoolExpr constraint = _context.MkLe(lowerTerm, variable);
+                    // Assert the constraint
+                    _optSolver.Assert(constraint);
+                }
+                // If lower bound is finite assert the lower bound constraint
+                if (upper.IsFinite)
+                {
+                    // Create the upper bound constraint
+                    ArithExpr upperTerm = GetNumeral(upper, variable.Sort);
+                    BoolExpr constraint = _context.MkGe(upperTerm, variable);
+                    // Assert the constraint
+                    _optSolver.Assert(constraint);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Adds a MSF variable with the coresponding assertion to the Z3 variables.
+        /// </summary>
+        /// <param name="vid">The MSF id of the variable</param>
+        internal void AddVariable(int vid)
+        {
+            // Is the variable an integer
+            bool isInteger = _model.GetIntegrality(vid);
+
+            // Construct the sort we will be using
+            Sort sort = isInteger ? (Sort)_context.IntSort : (Sort)_context.RealSort;
+
+            // Get the variable key
+            object key = _model.GetKeyFromIndex(vid);
+
+            // Try to construct the name
+            string name;
+            if (key != null) name = String.Format("x_{0}_{1}", key, vid);
+            else name = String.Format("x_{0}", vid);
+            ArithExpr variable = (ArithExpr)_context.MkConst(name, sort);
+
+            // Create the variable and add it to the map
+            Debug.Assert(!_variables.ContainsKey(vid), "Variable names should be unique.");
+            _variables.Add(vid, variable);
+
+            AssertArith(vid, variable);
+        }
+
+        internal ArithExpr GetNumeral(Rational rational, Sort sort = null)
+        {
+            return Utils.GetNumeral(_context, rational, sort);
+        }
+
+        internal void Solve(Z3BaseParams parameters, IEnumerable<IGoal> modelGoals, 
+                            Action<int> addRow, Func<int, ArithExpr> mkGoalRow, Action<Z3Result> setResult)
+        {
+            _variables.Clear();
+            _goals.Clear();
+
+            try
+            {
+                // Mark that we are in solving phase
+                _isSolving = true;
+
+                // Construct Z3
+                ConstructSolver(parameters);
+
+                // Add all the variables
+                foreach (int vid in _model.VariableIndices)
+                {
+                    AddVariable(vid);
+                }
+
+                // Add all the rows
+                foreach (int rid in _model.RowIndices)
+                {
+                    addRow(rid);
+                }
+
+                // Add enabled goals to optimization problem
+                foreach (IGoal g in modelGoals)
+                {
+                    if (!g.Enabled) continue;
+
+                    ArithExpr gr = mkGoalRow(g.Index);
+                    if (g.Minimize)
+                        _goals.Add(g, _optSolver.MkMinimize(gr));
+                    else
+                        _goals.Add(g, _optSolver.MkMaximize(gr));
+                }
+
+                if (_goals.Any() && parameters.SMT2LogFile != null)
+                {
+                    Debug.WriteLine("Dumping SMT2 benchmark to log file...");
+                    File.WriteAllText(parameters.SMT2LogFile, _optSolver.ToString());
+                }
+
+                bool aborted = parameters.QueryAbort();
+
+                if (!aborted)
+                {
+                    // Start the abort thread
+                    AbortWorker abortWorker = new AbortWorker(_context, parameters.QueryAbort);
+                    Thread abortThread = new Thread(abortWorker.Start);
+                    abortThread.Start();
+
+                    // Now solve the problem
+                    Status status = _optSolver.Check();
+
+                    // Stop the abort thread
+                    abortWorker.Stop();
+                    abortThread.Join();
+
+                    switch (status)
+                    {
+                        case Status.SATISFIABLE:
+                            Microsoft.Z3.Model model = _optSolver.Model;
+                            Debug.Assert(model != null, "Should be able to get Z3 model.");
+                            // Remember the solution values                                
+                            foreach (KeyValuePair<int, Expr> pair in _variables)
+                            {
+                                var value = Utils.ToRational(model.Eval(pair.Value, true));
+                                _model.SetValue(pair.Key, value);
+                            }
+                            // Remember all objective values
+                            foreach (var pair in _goals)
+                            {
+                                var optimalValue = Utils.ToRational(_optSolver.GetUpper(pair.Value));
+                                _model.SetValue(pair.Key.Index, optimalValue);
+                            }
+                            model.Dispose();
+                            setResult(_goals.Any() ? Z3Result.Optimal : Z3Result.Feasible);
+                            break;
+                        case Status.UNSATISFIABLE:
+                            setResult(Z3Result.Infeasible);
+                            break;
+                        case Status.UNKNOWN:
+                            if (abortWorker.Aborted)
+                            {
+                                Microsoft.Z3.Model subOptimalModel = _optSolver.Model;
+                                if (subOptimalModel != null && subOptimalModel.NumConsts != 0)
+                                {
+                                    // Remember the solution values                                
+                                    foreach (KeyValuePair<int, Expr> pair in _variables)
+                                    {
+                                        var value = Utils.ToRational(subOptimalModel.Eval(pair.Value, true));
+                                        _model.SetValue(pair.Key, value);
+                                    }
+                                    // Remember all objective values
+                                    foreach (var pair in _goals)
+                                    {
+                                        var optimalValue = Utils.ToRational(_optSolver.GetUpper(pair.Value));
+                                        _model.SetValue(pair.Key.Index, optimalValue);
+                                    }
+                                    subOptimalModel.Dispose();
+
+                                    setResult(Z3Result.LocalOptimal);
+                                }
+                                else
+                                    setResult(Z3Result.Infeasible);
+                            }
+                            else
+                                setResult(Z3Result.Interrupted);
+                            break;
+                        default:
+                            Debug.Assert(false, "Unrecognized Z3 Status");
+                            break;
+                    }
+                }
+            }
+            finally
+            {
+                _isSolving = false;
+            }
+
+            // Now kill Z3
+            DestructSolver(true);
+        }
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3MILPDirective.cs

@@ -0,0 +1,15 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using Microsoft.SolverFoundation.Services;
+using System;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    public class Z3MILPDirective : Z3BaseDirective
+    {
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3MILPParams.cs

@@ -0,0 +1,25 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using Microsoft.SolverFoundation.Services;
+using System;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    public class Z3MILPParams : Z3BaseParams
+    {
+        // Need these constructors for reflection done by plugin model
+
+        public Z3MILPParams() : base() { }
+
+        public Z3MILPParams(Directive directive) : base(directive) { }
+
+        public Z3MILPParams(Func<bool> queryAbortFunction) : base(queryAbortFunction) { }
+
+        public Z3MILPParams(Z3BaseParams z3Parameters) : base (z3Parameters) { }
+    }
+
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3MILPSolver.cs

@@ -0,0 +1,236 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.IO;
+
+using Microsoft.Z3;
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Services;
+using Microsoft.SolverFoundation.Plugin;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    /// <summary>
+    /// The class is implementation of the MSF mixed linear programming solver 
+    /// using the Microsoft Z3 solver as the backend.
+    /// </summary>
+    public class Z3MILPSolver : LinearModel, ILinearSolver, ILinearSolution, IReportProvider
+    {
+        #region Private members
+
+        private LinearResult _result;       
+        private LinearSolutionQuality _solutionQuality;
+        private Z3BaseSolver _solver;
+
+        #endregion Private members
+
+        #region Solver construction and destruction
+
+        /// <summary>Constructor that initializes the base clases</summary>
+        public Z3MILPSolver() : base(null) 
+        {
+            _result = LinearResult.Feasible;
+            _solver = new Z3BaseSolver(this);
+        }
+
+        /// <summary>Constructor that initializes the base clases</summary>
+        public Z3MILPSolver(ISolverEnvironment context) : this() { }
+
+        /// <summary>
+        /// Shutdown can be called when when the solver is not active, i.e. 
+        /// when it is done with Solve() or it has gracefully returns from Solve()
+        /// after an abort.
+        /// </summary>
+        public void Shutdown() { _solver.DestructSolver(true); }
+
+        #endregion Solver construction and destruction
+
+        #region Obtaining information about the solution
+
+        public ILinearSolverReport GetReport(LinearSolverReportType reportType)
+        {
+            // We don't support sensitivity report
+            return null;
+        }
+
+        #endregion Obtaining information about the solution
+
+        #region Construction of the problem
+
+        /// <summary>
+        /// Get corresponding Z3 formula of a MSF row.
+        /// </summary>
+        /// <param name="rid">The MSF row id</param>
+        private ArithExpr MkGoalRow(int rid)
+        {
+            // Start with the 0 term
+            List<ArithExpr> row = new List<ArithExpr>();
+
+            // Now, add all the entries of this row
+            foreach (LinearEntry entry in GetRowEntries(rid))
+            {
+                // Get the variable and constant in the row
+                ArithExpr e = _solver.GetVariable(entry.Index);                
+                if (!entry.Value.IsOne)
+                {
+                    e = _solver.Context.MkMul(_solver.GetNumeral(entry.Value, e.Sort), e);
+                }
+                row.Add(e);
+            }
+            switch (row.Count)
+            {
+                case 0: return _solver.GetNumeral(new Rational());
+                case 1: return row[0];
+                default: return _solver.Context.MkAdd(row.ToArray());
+            }
+        }
+
+        /// <summary>
+        /// Adds a MSF row to the Z3 assertions.
+        /// </summary>
+        /// <param name="rid">The MSF row id</param>
+        private void AddRow(int rid)
+        {
+            // Start with the 0 term
+            ArithExpr row = MkGoalRow(rid);
+            _solver.AssertArith(rid, row);
+        }
+
+        /// <summary>
+        /// Set results based on internal solver status
+        /// </summary>
+        private void SetResult(Z3Result status)
+        {
+            switch (status)
+            {
+                case Z3Result.Optimal:
+                    _result = LinearResult.Optimal;
+                    _solutionQuality = LinearSolutionQuality.Exact;
+                    break;
+                case Z3Result.LocalOptimal:
+                    _result = LinearResult.Feasible;
+                    _solutionQuality = LinearSolutionQuality.Approximate;
+                    break;
+                case Z3Result.Feasible:
+                    _result = LinearResult.Feasible;
+                    _solutionQuality = LinearSolutionQuality.Exact;
+                    break;
+                case Z3Result.Infeasible:
+                    _result = LinearResult.InfeasiblePrimal;
+                    _solutionQuality = LinearSolutionQuality.None;
+                    break;
+                case Z3Result.Interrupted:
+                    _result = LinearResult.Interrupted;
+                    _solutionQuality = LinearSolutionQuality.None;
+                    break;
+                default:
+                    Debug.Assert(false, "Unrecognized Z3 Result");
+                    break;
+            } 
+        }
+
+        #endregion Construction of the problem
+
+        #region Solving the problem            
+        
+        /// <summary>
+        /// Starts solving the problem using the Z3 solver.
+        /// </summary>
+        /// <param name="parameters">Parameters to the solver</param>
+        /// <returns>The solution to the problem</returns>
+        public ILinearSolution Solve(ISolverParameters parameters)
+        {
+            // Get the Z3 parameters
+            var z3Params = parameters as Z3BaseParams;
+            Debug.Assert(z3Params != null, "Parameters should be an instance of Z3BaseParams.");
+            
+            _solver.Solve(z3Params, Goals, AddRow, MkGoalRow, SetResult);
+
+            return this;
+        }
+
+        #endregion Solving the problem
+
+        #region ILinearSolution Members
+
+        public Rational GetSolutionValue(int goalIndex)
+        {
+            var goal = Goals.ElementAt(goalIndex);
+            Debug.Assert(goal != null, "Goal should be an element of the goal list.");
+            return GetValue(goal.Index);
+        }
+
+        public void GetSolvedGoal(int goalIndex, out object key, out int vid, out bool minimize, out bool optimal)
+        {
+            var goal = Goals.ElementAt(goalIndex);
+            Debug.Assert(goal != null, "Goal should be an element of the goal list.");
+            key = goal.Key;
+            vid = goal.Index;
+            minimize = goal.Minimize;
+            optimal = _result == LinearResult.Optimal;
+        }
+
+        // LpResult is LP relaxation assignment.
+        
+        public LinearResult LpResult
+        {
+            get { return _result; }
+        }
+
+        public Rational MipBestBound
+        {
+            get
+            {
+                Debug.Assert(GoalCount > 0, "MipBestBound is only applicable for optimization instances.");
+                return GetSolutionValue(0);
+            }
+        }
+
+        public LinearResult MipResult
+        {
+            get { return _result; }
+        }
+
+        public LinearResult Result
+        {
+            get { return _result; }
+        }
+
+        public LinearSolutionQuality SolutionQuality
+        {
+            get { return _solutionQuality; }
+        }
+
+        public int SolvedGoalCount
+        {
+            get { return GoalCount; }
+        }
+
+        #endregion
+
+        public Report GetReport(SolverContext context, Solution solution, SolutionMapping solutionMapping)
+        {
+            LinearSolutionMapping lpSolutionMapping = solutionMapping as LinearSolutionMapping;
+            if (lpSolutionMapping == null && solutionMapping != null)
+                throw new ArgumentException("solutionMapping is not a LinearSolutionMapping", "solutionMapping");
+            return new Z3LinearSolverReport(context, this, solution, lpSolutionMapping);
+        }
+    }
+
+    /// <summary>
+    /// Class implementing the LinearReport.
+    /// </summary>
+    public class Z3LinearSolverReport : LinearReport
+    {
+        public Z3LinearSolverReport(SolverContext context, ISolver solver, Solution solution, LinearSolutionMapping solutionMapping)
+          : base(context, solver, solution, solutionMapping) {
+        }
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3TermDirective.cs

@@ -0,0 +1,15 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using Microsoft.SolverFoundation.Services;
+using System;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    public class Z3TermDirective : Z3BaseDirective
+    {
+    }
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3TermParams.cs

@@ -0,0 +1,23 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using Microsoft.SolverFoundation.Services;
+using System;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    public class Z3TermParams : Z3BaseParams
+    {
+        public Z3TermParams() : base() { }
+
+        public Z3TermParams(Directive directive) : base(directive) { }
+
+        public Z3TermParams(Func<bool> queryAbortFunction) : base(queryAbortFunction) { }
+
+        public Z3TermParams(Z3BaseParams z3Parameters) : base(z3Parameters) { }
+    }
+
+}

examples/msf/SolverFoundation.Plugin.Z3/Z3TermSolver.cs

@@ -0,0 +1,388 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.Threading;
+using System.Globalization;
+using System.Collections.Generic;
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Properties;
+using Microsoft.SolverFoundation.Solvers;
+using Microsoft.SolverFoundation.Services;
+using Microsoft.Z3;
+using System.Linq;
+using System.Diagnostics;
+using System.IO;
+
+namespace Microsoft.SolverFoundation.Plugin.Z3
+{
+    /// <summary>
+    /// The class is implementation of the MSF constraint solver
+    /// using the Microsoft Z3 solver as the backend. 
+    /// This solver supports Int, Real constraints and their arbitrary boolean combinations.
+    /// </summary>
+    public class Z3TermSolver : TermModel, ITermSolver, INonlinearSolution, IReportProvider
+    {
+        private NonlinearResult _result;
+        private Z3BaseSolver _solver;
+
+        /// <summary>Constructor that initializes the base clases</summary>
+        public Z3TermSolver() : base(null) 
+        {
+            _solver = new Z3BaseSolver(this);
+        }
+
+        /// <summary>Constructor that initializes the base clases</summary>
+        public Z3TermSolver(ISolverEnvironment context) : this() { }
+
+        /// <summary>
+        /// Shutdown can be called when when the solver is not active, i.e. 
+        /// when it is done with Solve() or it has gracefully returns from Solve()
+        /// after an abort.
+        /// </summary>
+        public void Shutdown() { _solver.DestructSolver(true); }
+
+        private BoolExpr MkBool(int rid)
+        {
+            var context = _solver.Context;
+
+            if (IsConstant(rid))
+            {
+                Rational lower, upper;
+                GetBounds(rid, out lower, out upper);
+                Debug.Assert(lower == upper);
+                if (lower.IsZero) return context.MkFalse();
+                return context.MkTrue();
+            }
+            if (IsOperation(rid))
+            {
+                BoolExpr[] children;
+                ArithExpr[] operands;
+                TermModelOperation op = GetOperation(rid);
+                switch(op) {
+                   case TermModelOperation.And:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Conjunction requires at least two operands.");
+                        children = (GetOperands(rid)).Select(x => MkBool(x)).ToArray();
+                        return context.MkAnd(children);
+                    case TermModelOperation.Or:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Disjunction requires at least two operands.");
+                        children = (GetOperands(rid)).Select(x => MkBool(x)).ToArray();
+                        return context.MkOr(children);
+                    case TermModelOperation.Not:
+                        Debug.Assert(GetOperandCount(rid) == 1, "Negation is unary.");
+                        return context.MkNot(MkBool(GetOperand(rid, 0)));
+                    case TermModelOperation.If:
+                        Debug.Assert(GetOperandCount(rid) == 3, "If is ternary.");
+                        BoolExpr b = MkBool(GetOperand(rid, 0));
+                        Expr x1 = MkBool(GetOperand(rid, 1));
+                        Expr x2 = MkBool(GetOperand(rid, 2));
+                        return (BoolExpr)context.MkITE(b, x1, x2);
+                    case TermModelOperation.Unequal:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Distinct should have at least two operands.");
+                        return context.MkDistinct((GetOperands(rid)).Select(x => MkTerm(x)).ToArray());
+                    case TermModelOperation.Greater:
+                    case TermModelOperation.Less:
+                    case TermModelOperation.GreaterEqual:
+                    case TermModelOperation.LessEqual:
+                    case TermModelOperation.Equal:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Comparison should have at least two operands.");
+                        operands = (GetOperands(rid)).Select(x => MkTerm(x)).ToArray();
+                        return ReduceComparison(GetOperation(rid), operands);
+                    case TermModelOperation.Identity:
+                        Debug.Assert(GetOperandCount(rid) == 1, "Identity takes exactly one operand.");
+                        return MkBool(GetOperand(rid, 0));
+                    default:
+                        return context.MkEq(MkTerm(rid), _solver.GetNumeral(Rational.One));
+                }
+            }
+            return context.MkEq(MkTerm(rid), _solver.GetNumeral(Rational.One));
+        }
+
+        private ArithExpr MkBoolToArith(BoolExpr e)
+        {
+            var context = _solver.Context;
+            return (ArithExpr)context.MkITE(e, _solver.GetNumeral(Rational.One), _solver.GetNumeral(Rational.Zero));
+        }
+
+        private ArithExpr MkTerm(int rid) 
+        {
+            var context = _solver.Context;
+
+            if (IsConstant(rid))
+            {
+                Rational lower, upper;
+                GetBounds(rid, out lower, out upper);
+                Debug.Assert(lower == upper);
+                return _solver.GetNumeral(lower);
+            }
+            else if (IsOperation(rid)) 
+            {
+                ArithExpr[] operands;
+                TermModelOperation op = GetOperation(rid);
+                switch(op) 
+                {
+                    case TermModelOperation.And:
+                    case TermModelOperation.Or:
+                    case TermModelOperation.Not:
+                    case TermModelOperation.Unequal:
+                    case TermModelOperation.Greater:
+                    case TermModelOperation.Less:
+                    case TermModelOperation.GreaterEqual:
+                    case TermModelOperation.LessEqual:
+                    case TermModelOperation.Equal:
+                        return MkBoolToArith(MkBool(rid));
+                    case TermModelOperation.If:
+                        Debug.Assert(GetOperandCount(rid) == 3, "If is ternary.");
+                        BoolExpr b = MkBool(GetOperand(rid, 0));
+                        Expr x1 = MkTerm(GetOperand(rid, 1));
+                        Expr x2 = MkTerm(GetOperand(rid, 2));
+                        return (ArithExpr)context.MkITE(b, x1, x2);
+                    case TermModelOperation.Plus:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Plus takes at least two operands.");
+                        operands = (GetOperands(rid)).Select(x => MkTerm(x)).ToArray();
+                        return context.MkAdd(operands);
+                    case TermModelOperation.Minus:
+                        Debug.Assert(GetOperandCount(rid) == 1, "Minus takes exactly one operand.");
+                        return context.MkUnaryMinus(MkTerm(GetOperand(rid, 0)));
+                    case TermModelOperation.Times:
+                        Debug.Assert(GetOperandCount(rid) >= 2, "Times requires at least two operands.");
+                        operands = (GetOperands(rid)).Select(x => MkTerm(x)).ToArray();
+                        return context.MkMul(operands);
+                    case TermModelOperation.Identity:
+                        Debug.Assert(GetOperandCount(rid) == 1, "Identity takes exactly one operand.");
+                        return MkTerm(GetOperand(rid, 0));
+                    case TermModelOperation.Abs:
+                        Debug.Assert(GetOperandCount(rid) == 1, "Abs takes exactly one operand.");
+                        ArithExpr e = MkTerm(GetOperand(rid, 0));
+                        ArithExpr minusE = context.MkUnaryMinus(e);
+                        ArithExpr zero = _solver.GetNumeral(Rational.Zero);
+                        return (ArithExpr)context.MkITE(context.MkGe(e, zero), e, minusE);
+                    default:
+                        Console.Error.WriteLine("{0} operation isn't supported.", op);
+                        throw new NotSupportedException();
+                }
+            }
+            else
+            {
+                return _solver.GetVariable(rid);
+            }
+        }
+
+        private BoolExpr ReduceComparison(TermModelOperation type, ArithExpr[] operands)
+        {
+            var context = _solver.Context;
+            Debug.Assert(operands.Length >= 2);            
+            Func<ArithExpr, ArithExpr, BoolExpr> mkComparison;
+            switch (type)
+            {
+                case TermModelOperation.Greater:
+                    mkComparison = (x, y) => context.MkGt(x, y);
+                    break;
+                case TermModelOperation.Less:
+                    mkComparison = (x, y) => context.MkLt(x, y);
+                    break;
+                case TermModelOperation.GreaterEqual:
+                    mkComparison = (x, y) => context.MkGe(x, y);
+                    break;
+                case TermModelOperation.LessEqual:
+                    mkComparison = (x, y) => context.MkLe(x, y);
+                    break;
+                case TermModelOperation.Equal:
+                    mkComparison = (x, y) => context.MkEq(x, y);
+                    break;
+                default:
+                    throw new NotSupportedException();
+            }
+
+            BoolExpr current = mkComparison(operands[0], operands[1]);
+            for (int i = 1; i < operands.Length - 1; ++i)
+                current = context.MkAnd(current, mkComparison(operands[i], operands[i + 1]));
+            return current;
+        }
+
+        private bool IsBoolRow(int rid)
+        {
+            Rational lower, upper;
+            GetBounds(rid, out lower, out upper);
+
+            return lower == upper && lower.IsOne && IsBoolTerm(rid);
+        }
+
+        private bool IsBoolTerm(int rid)
+        {
+            if (IsConstant(rid))
+            {
+                Rational lower, upper;
+                GetBounds(rid, out lower, out upper);
+                Debug.Assert(lower == upper);
+                return lower.IsOne || lower.IsZero;
+            }
+            if (IsOperation(rid))
+            {
+                TermModelOperation op = GetOperation(rid);
+                switch (op)
+                {
+                    case TermModelOperation.And:
+                    case TermModelOperation.Or:
+                    case TermModelOperation.Not:
+                    case TermModelOperation.LessEqual:
+                    case TermModelOperation.Less:
+                    case TermModelOperation.Greater:
+                    case TermModelOperation.GreaterEqual:
+                    case TermModelOperation.Unequal:
+                    case TermModelOperation.Equal:                        
+                        return true;
+                    case TermModelOperation.If:
+                        return IsBoolTerm(GetOperand(rid, 1)) &&
+                                IsBoolTerm(GetOperand(rid, 2));
+                    case TermModelOperation.Identity:
+                        return IsBoolTerm(GetOperand(rid, 0));
+                    default:
+                        return false;
+                }
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Adds a MSF row to the Z3 assertions.
+        /// </summary>
+        /// <param name="rid">The MSF row id</param>
+        private void AddRow(int rid)
+        {
+            if (IsConstant(rid))
+                return;
+
+            if (IsBoolRow(rid))
+            {
+                _solver.AssertBool(MkBool(rid));
+                return;
+            }
+            // Start with the 0 term
+            ArithExpr row = MkTerm(rid);
+            _solver.AssertArith(rid, row);
+        }
+
+        private TermModelOperation[] _supportedOperations =
+                { TermModelOperation.And,
+                  TermModelOperation.Or,
+                  TermModelOperation.Not,
+                  TermModelOperation.Unequal,
+                  TermModelOperation.Greater,
+                  TermModelOperation.Less,
+                  TermModelOperation.GreaterEqual,
+                  TermModelOperation.LessEqual,
+                  TermModelOperation.Equal,
+                  TermModelOperation.If,
+                  TermModelOperation.Plus,
+                  TermModelOperation.Minus,
+                  TermModelOperation.Times,
+                  TermModelOperation.Identity,
+                  TermModelOperation.Abs };
+
+        /// <summary>
+        /// Gets the operations supported by the solver.
+        /// </summary>
+        /// <returns>All the TermModelOperations supported by the solver.</returns>
+        public IEnumerable<TermModelOperation> SupportedOperations
+        {
+            get { return _supportedOperations; }
+        }
+
+        /// <summary>
+        /// Set results based on internal solver status
+        /// </summary>
+        private void SetResult(Z3Result status)
+        {
+            switch (status)
+            {
+                case Z3Result.Optimal:
+                    _result = NonlinearResult.Optimal;
+                    break;
+                case Z3Result.LocalOptimal:
+                    _result = NonlinearResult.LocalOptimal;
+                    break;
+                case Z3Result.Feasible:
+                    _result = NonlinearResult.Feasible;
+                    break;
+                case Z3Result.Infeasible:
+                    _result = NonlinearResult.Infeasible;
+                    break;
+                case Z3Result.Interrupted:
+                    _result = NonlinearResult.Interrupted;
+                    break;
+                default:
+                    Debug.Assert(false, "Unrecognized Z3 Result");
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Starts solving the problem using the Z3 solver.
+        /// </summary>
+        /// <param name="parameters">Parameters to the solver</param>
+        /// <returns>The solution to the problem</returns>
+        public INonlinearSolution Solve(ISolverParameters parameters)
+        {
+            // Get the Z3 parameters
+            var z3Params = parameters as Z3BaseParams;
+            Debug.Assert(z3Params != null, "Parameters should be an instance of Z3BaseParams.");
+
+            _solver.Solve(z3Params, Goals, AddRow, MkTerm, SetResult);
+
+            return this;
+        }
+
+        double INonlinearSolution.GetValue(int vid)
+        {
+            Debug.Assert(_solver.Variables.ContainsKey(vid), "This index should correspond to a variable.");
+            return GetValue(vid).ToDouble();
+        }
+
+        public int SolvedGoalCount
+        {
+            get { return GoalCount; }
+        }
+
+        public double GetSolutionValue(int goalIndex)
+        {
+            var goal = Goals.ElementAt(goalIndex);
+            Debug.Assert(goal != null, "Goal should be an element of the goal list.");
+            return GetValue(goal.Index).ToDouble();
+        }
+
+        public void GetSolvedGoal(int goalIndex, out object key, out int vid, out bool minimize, out bool optimal)
+        {
+            var goal = Goals.ElementAt(goalIndex);
+            Debug.Assert(goal != null, "Goal should be an element of the goal list.");
+            key = goal.Key;
+            vid = goal.Index;
+            minimize = goal.Minimize;
+            optimal = _result == NonlinearResult.Optimal;
+        }
+
+        public NonlinearResult Result
+        {
+            get { return _result; }
+        }
+
+        public Report GetReport(SolverContext context, Solution solution, SolutionMapping solutionMapping)
+        {
+            PluginSolutionMapping pluginSolutionMapping = solutionMapping as PluginSolutionMapping;
+            if (pluginSolutionMapping == null && solutionMapping != null)
+                throw new ArgumentException("solutionMapping is not a LinearSolutionMapping", "solutionMapping");
+            return new Z3TermSolverReport(context, this, solution, pluginSolutionMapping);
+        }
+    }
+
+    public class Z3TermSolverReport : Report
+    {
+        public Z3TermSolverReport(SolverContext context, ISolver solver, Solution solution, PluginSolutionMapping pluginSolutionMapping)
+            : base(context, solver, solution, pluginSolutionMapping)
+        {          
+        }
+    }
+}

examples/msf/Validator/App.config

@@ -0,0 +1,60 @@
+<?xml version="1.0"?>
+<configuration>
+  <configSections>
+    <section name="MsfConfig" 
+             type="Microsoft.SolverFoundation.Services.MsfConfigSection, Microsoft.Solver.Foundation" 
+             allowLocation="true" 
+             allowDefinition="Everywhere" 
+             allowExeDefinition="MachineToApplication" 
+             restartOnExternalChanges="true" 
+             requirePermission="true"/>
+  </configSections>
+  <MsfConfig>
+    <MsfPluginSolvers>      
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver" 
+                       capability="LP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="MILP" 
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver" 
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective" 
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver" 
+                       capability="LP"                        
+                       assembly="SolverFoundation.Plugin.Z3.dll" 
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="MINLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="NLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+    </MsfPluginSolvers>
+  </MsfConfig>
+<startup>
+  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
+</startup>
+</configuration>

examples/msf/Validator/MicrosoftSolverFoundationForExcel.dll.config

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <configSections>
+    <section
+      name="MsfConfig"
+      type="Microsoft.SolverFoundation.Services.MsfConfigSection, Microsoft.Solver.Foundation"
+      allowLocation="true"
+      allowDefinition="Everywhere"
+      allowExeDefinition="MachineToApplication"
+      restartOnExternalChanges="true"
+      requirePermission="true" />
+  </configSections>
+  <MsfConfig>
+    <MsfPluginSolvers>
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver"
+                       capability="MILP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+      <MsfPluginSolver name="Microsoft Z3 MILP Solver"
+                       capability="LP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3MILPParams"/>
+
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="MILP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="LP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="MINLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+      <MsfPluginSolver name="Microsoft Z3 Term Solver"
+                       capability="NLP"
+                       assembly="SolverFoundation.Plugin.Z3.dll"
+                       interface="Microsoft.SolverFoundation.Services.ITermSolver"
+                       solverclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermSolver"
+                       directiveclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermDirective"
+                       parameterclass="Microsoft.SolverFoundation.Plugin.Z3.Z3TermParams"/>
+    </MsfPluginSolvers>
+  </MsfConfig>
+</configuration>

examples/msf/Validator/Program.cs

@@ -0,0 +1,200 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Collections.Generic;
+using Microsoft.SolverFoundation.Common;
+using Microsoft.SolverFoundation.Solvers;
+using Microsoft.SolverFoundation.Plugin.Z3;
+using Microsoft.SolverFoundation.Services;
+using System.Text;
+
+namespace Validator
+{
+    class Program
+    {
+        static void LoadModel(SolverContext context, string fileName)
+        { 
+            string ext = Path.GetExtension(fileName).ToLower();
+
+            if (ext == ".mps")
+            {
+                context.LoadModel(FileFormat.MPS, Path.GetFullPath(fileName));
+            }
+            else if (ext == ".smps")
+            {
+                context.LoadModel(FileFormat.SMPS, Path.GetFullPath(fileName));
+            }
+            else if (ext == ".oml")
+            {
+                context.LoadModel(FileFormat.OML, Path.GetFullPath(fileName));
+            }
+            else
+            {
+                throw new NotSupportedException("This file format hasn't been supported.");
+            }
+        }
+
+        static void ExecuteZ3(string fileName, Z3BaseDirective directive)
+        {
+            SolverContext context = SolverContext.GetContext();
+            try
+            {
+                LoadModel(context, fileName);
+
+                Solution solution = context.Solve(directive);
+                Report report = solution.GetReport();
+                Console.Write("{0}", report);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Skipping unsolvable instance in {0} with error message '{1}'.", fileName, e.Message);
+            }
+            finally
+            {
+                context.ClearModel();
+            }
+        }
+
+        static void ConvertToSMT2(string fileName, Z3BaseDirective directive)
+        {
+            SolverContext context = SolverContext.GetContext();
+            try
+            {
+                LoadModel(context, fileName);
+
+                if (context.CurrentModel.Goals.Any())
+                {
+                    directive.SMT2LogFile = Path.ChangeExtension(fileName, ".smt2");
+                    context.Solve(() => true, directive);
+                }
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Skipping unconvertable instance in {0} with error message '{1}'.", fileName, e.Message);
+            }
+            finally
+            {
+                context.ClearModel();
+            }       
+        }
+
+        static void ValidateZ3(string fileName, Z3BaseDirective directive)
+        {
+            SolverContext context = SolverContext.GetContext();
+            try
+            {
+                LoadModel(context, fileName);
+
+                if (context.CurrentModel.Goals.Any())
+                {
+                    var msfDirective = (directive is Z3MILPDirective) ? (Directive)new MixedIntegerProgrammingDirective() { TimeLimit = 10000 }
+                                            : (Directive)new Directive() { TimeLimit = 10000 };
+                    var sol1 = context.Solve(msfDirective);
+                    
+                    Console.WriteLine("Solved the model using MSF.");
+                    Console.Write("{0}", sol1.GetReport());
+                    var expectedGoals = sol1.Goals.Select(x => x.ToDouble());
+                    context.ClearModel();
+
+                    context.LoadModel(FileFormat.OML, Path.GetFullPath(fileName));
+                    directive.SMT2LogFile = Path.ChangeExtension(fileName, ".smt2");
+                    var sol2 = context.Solve(directive);
+                    //Console.Write("{0}", sol2.GetReport());
+                    var actualGoals = sol2.Goals.Select(x => x.ToDouble());
+
+                    Console.WriteLine("Solved the model using Z3.");
+                    var goalPairs = expectedGoals.Zip(actualGoals, (expected, actual) => new { expected, actual }).ToArray();
+                    bool validated = goalPairs.All(p => Math.Abs(p.expected - p.actual) <= 0.0001);
+                    if (validated)
+                    {
+                        Console.WriteLine("INFO: Two solvers give approximately the same results.");
+                    }
+                    else
+                    {
+                        Console.Error.WriteLine("ERROR: Discrepancy found between results.");
+                        if (!validated && File.Exists(directive.SMT2LogFile))
+                        {
+                            var sb = new StringBuilder();                            
+                            for(int i = 0; i < goalPairs.Length; i++)
+                            {
+                                sb.AppendFormat("\n(echo \"Goal {0}: actual |-> {1:0.0000}, expected |-> {2:0.0000}\")",
+                                    i + 1, goalPairs[i].actual, goalPairs[i].expected);
+                            }
+                            Console.Error.WriteLine(sb.ToString());
+                            File.AppendAllText(directive.SMT2LogFile, sb.ToString());
+                        }
+                    }
+                }
+                else
+                {
+                    Console.WriteLine("Ignoring this instance without having any goal.");
+                }
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Skipping unsolvable instance in {0} with error message '{1}'.", 
+                    fileName, e.Message);
+            }
+            finally
+            {
+                context.ClearModel();
+            }
+        }
+
+        static void Main(string[] args)
+        {
+            Z3BaseDirective directive = new Z3MILPDirective();
+
+            for (int i = 0; i < args.Length; ++i) {
+                if (args[i] == "-s" || args[i] == "-solve")
+                {
+                    ExecuteZ3(args[i + 1], directive);
+                    return;
+                }
+                if (args[i] == "-c" || args[i] == "-convert")
+                {
+                    ConvertToSMT2(args[i + 1], directive);
+                    return;
+                }
+                if (args[i] == "-v" || args[i] == "-validate")
+                {
+                    ValidateZ3(args[i + 1], directive);
+                    return;
+                }
+                if (args[i] == "-t" || args[i] == "-term")
+                {
+                    directive = new Z3TermDirective();
+                }
+            }
+
+            if (args.Length > 0)
+            {
+                ExecuteZ3(args[0], directive);
+                return;
+            }
+
+            Console.WriteLine(@"
+Validator is a simple command line to migrate benchmarks from OML, MPS and SMPS to SMT2 formats.
+
+Commands:
+    -solve <file_name> : solving the model using Z3
+    -convert <file_name> : converting the model into SMT2 format
+    -validate <file_name> : validating by comparing results between Z3 and MSF solvers
+    -term : change the default Z3 MILP solver to Z3 Term solver
+
+    where <file_name> is any file with OML, MPS or SMPS extension.
+
+Examples:
+    Validator.exe -convert model.mps
+    Validator.exe -term -solve model.oml
+
+");
+        }
+    }
+}

examples/msf/Validator/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("testSolver")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Microsoft")]
+[assembly: AssemblyProduct("testSolver")]
+[assembly: AssemblyCopyright("Copyright © Microsoft 2009")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("c03c1084-d119-483f-80fe-c639eae75959")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

examples/msf/Validator/Validator.csproj

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>9.0.21022</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{54835857-129F-44C9-B529-A42158647B36}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Validator</RootNamespace>
+    <AssemblyName>Validator</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>    
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x64' ">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x64\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <CodeAnalysisUseTypeNameInSuppression>true</CodeAnalysisUseTypeNameInSuppression>
+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x64' ">
+    <OutputPath>bin\x64\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <CodeAnalysisUseTypeNameInSuppression>true</CodeAnalysisUseTypeNameInSuppression>
+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x86\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
+    <OutputPath>bin\x86\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Solver.Foundation">
+      <HintPath>..\Microsoft.Solver.Foundation.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core">      
+    </Reference>
+    <Reference Include="System.Xml.Linq">      
+    </Reference>
+    <Reference Include="System.Data.DataSetExtensions">      
+    </Reference>
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+    <None Include="MicrosoftSolverFoundationForExcel.dll.config" />
+  </ItemGroup>  
+  <ItemGroup>
+    <ProjectReference Include="..\SolverFoundation.Plugin.Z3\SolverFoundation.Plugin.Z3.csproj">
+      <Project>{7340e664-f648-4ff7-89b2-f4da424996d3}</Project>
+      <Name>SolverFoundation.Plugin.Z3</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

examples/msf/Z3MSFPlugin.sln

@@ -0,0 +1,125 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SolverFoundation.Plugin.Z3", "SolverFoundation.Plugin.Z3\SolverFoundation.Plugin.Z3.csproj", "{7340E664-F648-4FF7-89B2-F4DA424996D3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SolverFoundation.Plugin.Z3.Tests", "SolverFoundation.Plugin.Z3.Tests\SolverFoundation.Plugin.Z3.Tests.csproj", "{280AEE2F-1FDB-4A27-BE37-14DC154C873B}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Validator", "Validator\Validator.csproj", "{54835857-129F-44C9-B529-A42158647B36}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{F1E99540-BA5E-46DF-9E29-6146A309CD18}"
+	ProjectSection(SolutionItems) = preProject
+		README = README
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		commercial_64|Any CPU = commercial_64|Any CPU
+		commercial_64|Mixed Platforms = commercial_64|Mixed Platforms
+		commercial_64|x64 = commercial_64|x64
+		commercial_64|x86 = commercial_64|x86
+		commercial|Any CPU = commercial|Any CPU
+		commercial|Mixed Platforms = commercial|Mixed Platforms
+		commercial|x64 = commercial|x64
+		commercial|x86 = commercial|x86
+		Debug|Any CPU = Debug|Any CPU
+		Debug|Mixed Platforms = Debug|Mixed Platforms
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|Mixed Platforms = Release|Mixed Platforms
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|Any CPU.ActiveCfg = commercial_64|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|Any CPU.Build.0 = commercial_64|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|Mixed Platforms.ActiveCfg = commercial_64|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|Mixed Platforms.Build.0 = commercial_64|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|x64.ActiveCfg = commercial_64|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|x86.ActiveCfg = commercial_64|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial_64|x86.Build.0 = commercial_64|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|Any CPU.ActiveCfg = commercial|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|Any CPU.Build.0 = commercial|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|Mixed Platforms.ActiveCfg = commercial|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|Mixed Platforms.Build.0 = commercial|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|x64.ActiveCfg = commercial|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|x86.ActiveCfg = commercial|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.commercial|x86.Build.0 = commercial|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|Mixed Platforms.ActiveCfg = Debug|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|Mixed Platforms.Build.0 = Debug|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|x86.ActiveCfg = Debug|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Debug|x86.Build.0 = Debug|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|Mixed Platforms.ActiveCfg = Release|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|Mixed Platforms.Build.0 = Release|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|x64.ActiveCfg = Release|Any CPU
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|x86.ActiveCfg = Release|x86
+		{7340E664-F648-4FF7-89B2-F4DA424996D3}.Release|x86.Build.0 = Release|x86
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|Any CPU.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|Any CPU.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|Mixed Platforms.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|x64.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial_64|x86.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|Any CPU.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|Any CPU.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|Mixed Platforms.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|x64.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.commercial|x86.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Debug|x86.Build.0 = Debug|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|x64.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|x86.ActiveCfg = Release|Any CPU
+		{280AEE2F-1FDB-4A27-BE37-14DC154C873B}.Release|x86.Build.0 = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|Any CPU.ActiveCfg = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|Any CPU.Build.0 = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|Mixed Platforms.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|Mixed Platforms.Build.0 = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|x64.ActiveCfg = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|x64.Build.0 = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|x86.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial_64|x86.Build.0 = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|Any CPU.ActiveCfg = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|Any CPU.Build.0 = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|Mixed Platforms.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|Mixed Platforms.Build.0 = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|x64.ActiveCfg = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|x64.Build.0 = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|x86.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.commercial|x86.Build.0 = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|Mixed Platforms.ActiveCfg = Debug|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|Mixed Platforms.Build.0 = Debug|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|x64.ActiveCfg = Debug|x64
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|x64.Build.0 = Debug|x64
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|x86.ActiveCfg = Debug|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Debug|x86.Build.0 = Debug|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.Release|Any CPU.Build.0 = Release|Any CPU
+		{54835857-129F-44C9-B529-A42158647B36}.Release|Mixed Platforms.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Release|Mixed Platforms.Build.0 = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Release|x64.ActiveCfg = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.Release|x64.Build.0 = Release|x64
+		{54835857-129F-44C9-B529-A42158647B36}.Release|x86.ActiveCfg = Release|x86
+		{54835857-129F-44C9-B529-A42158647B36}.Release|x86.Build.0 = Release|x86
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

examples/python/complex/complex.py

@@ -47,13 +47,13 @@ class ComplexExpr:
         return ComplexExpr(other.r*self.r - other.i*self.i, other.i*self.r + other.r*self.i)
 
     def __pow__(self, k):
-	if k == 0:
-	    return ComplexExpr(1, 0)
-	if k == 1:
-	    return self
-	if k < 0:
-	    return (self ** (-k)).inv()
-	return reduce(lambda x, y: x * y, [self for _ in xrange(k)], ComplexExpr(1, 0))
+        if k == 0:
+            return ComplexExpr(1, 0)
+        if k == 1:
+            return self
+        if k < 0:
+            return (self ** (-k)).inv()
+        return reduce(lambda x, y: x * y, [self for _ in xrange(k)], ComplexExpr(1, 0))
 
     def inv(self):
         den = self.r*self.r + self.i*self.i

examples/python/example.py

@@ -1,3 +1,5 @@
+# Copyright (c) Microsoft Corporation 2015
+
 from z3 import *
 
 x = Real('x')

examples/tptp/tptp5.cpp

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #include <string>
 #include <cstring>
 #include <list>
@@ -809,8 +815,12 @@ class env {
                 r = terms[0] / terms[1];
             }
             else if (!strcmp(ch,"$distinct")) {
-                check_arity(terms.size(), 2);
-                r = terms[0] != terms[1];
+                if (terms.size() == 2) {
+                    r = terms[0] != terms[1];
+                }
+                else {
+                    r = distinct(terms);
+                }
             }
             else if (!strcmp(ch,"$floor") || !strcmp(ch,"$to_int")) {
                 check_arity(terms.size(), 1);
@@ -1089,12 +1099,11 @@ class env {
     }
 
     z3::sort mk_sort(char const* s) {
-        z3::symbol sym = symbol(s);
-        return mk_sort(sym);
+        return m_context.uninterpreted_sort(s);
     }
 
     z3::sort mk_sort(z3::symbol& s) {
-        return z3::sort(m_context, Z3_mk_uninterpreted_sort(m_context, s));
+        return m_context.uninterpreted_sort(s);
     }
     
 public:
@@ -2083,7 +2092,7 @@ bool parse_is_sat_line(char const* line, bool& is_sat) {
         return true;
     }
     return false;
-}
+}    
 
 bool parse_is_sat(char const* filename, bool& is_sat) {
     std::ifstream is(filename);

examples/tptp/tptp5.h

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #ifndef TPTP5_H_
 #define TPTP5_H_
 

examples/tptp/tptp5.lex.cpp

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #line 2 "tptp5.lex.cpp"
 
 #line 4 "tptp5.lex.cpp"

scripts/mk_copyright.py

@@ -0,0 +1,57 @@
+# Copyright (c) 2015 Microsoft Corporation
+
+import os
+import re
+
+cr = re.compile("Copyright")
+aut = re.compile("Automatically generated")
+
+cr_notice = """
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
+"""
+
+def has_cr(file):
+    ins = open(file)
+    lines = 0
+    line = ins.readline()
+    while line and lines < 20:
+	m = cr.search(line)
+	if m:
+	    ins.close()
+	    return True
+	m = aut.search(line)
+	if m:
+	    ins.close()
+	    return True
+	line = ins.readline()
+    ins.close()
+    return False
+
+def add_cr(file):
+    tmp = "%s.tmp" % file
+    ins = open(file)
+    ous = open(tmp,'w')
+    ous.write(cr_notice)
+    line = ins.readline()
+    while line:
+	ous.write(line)
+	line = ins.readline()
+    ins.close()
+    ous.close()
+    os.system("move %s %s" % (tmp, file))
+    
+def add_missing_cr(dir):
+    for root, dirs, files in os.walk(dir):
+	for f in files:
+	    if f.endswith('.cpp') or f.endswith('.h') or f.endswith('.c') or f.endswith('.cs'):
+		path = "%s\\%s" % (root, f)
+		if not has_cr(path):
+		    print "Missing CR for %s" % path
+		    add_cr(path)
+
+add_missing_cr('src')
+add_missing_cr('examples')

scripts/mk_project.py

@@ -9,12 +9,13 @@ from mk_util import *
 
 # Z3 Project definition
 def init_project_def():
-    set_version(4, 4, 0, 0)
+    set_version(4, 4, 1, 0)
     add_lib('util', [])
     add_lib('polynomial', ['util'], 'math/polynomial')
     add_lib('sat', ['util'])
     add_lib('nlsat', ['polynomial', 'sat'])
     add_lib('hilbert', ['util'], 'math/hilbert')
+    add_lib('simplex', ['util'], 'math/simplex')
     add_lib('interval', ['util'], 'math/interval')
     add_lib('realclosure', ['interval'], 'math/realclosure')
     add_lib('subpaving', ['interval'], 'math/subpaving')
@@ -49,37 +50,38 @@ def init_project_def():
     add_lib('smt_params', ['ast', 'simplifier', 'pattern', 'bit_blaster'], 'smt/params')
     add_lib('proto_model', ['model', 'simplifier', 'smt_params'], 'smt/proto_model')
     add_lib('smt', ['bit_blaster', 'macros', 'normal_forms', 'cmd_context', 'proto_model',
-                    'substitution', 'grobner', 'euclid', 'proof_checker', 'pattern', 'parser_util', 'fpa'])
+                    'substitution', 'grobner', 'euclid', 'simplex', 'proof_checker', 'pattern', 'parser_util', 'fpa'])
     add_lib('user_plugin', ['smt'], 'smt/user_plugin')
     add_lib('bv_tactics', ['tactic', 'bit_blaster'], 'tactic/bv')
     add_lib('fuzzing', ['ast'], 'test/fuzzing')
     add_lib('smt_tactic', ['smt'], 'smt/tactic')
-    add_lib('fpa_tactics', ['fpa', 'core_tactics', 'bv_tactics', 'sat_tactic', 'smt_tactic'], 'tactic/fpa')
     add_lib('sls_tactic', ['tactic', 'normal_forms', 'core_tactics', 'bv_tactics'], 'tactic/sls')
     add_lib('qe', ['smt','sat'], 'qe')
     add_lib('duality', ['smt', 'interp', 'qe'])
     add_lib('muz', ['smt', 'sat', 'smt2parser', 'aig_tactic', 'qe'], 'muz/base')
-    add_lib('transforms', ['muz', 'hilbert'], 'muz/transforms')
+    add_lib('dataflow', ['muz'], 'muz/dataflow')
+    add_lib('transforms', ['muz', 'hilbert', 'dataflow'], 'muz/transforms')
     add_lib('rel', ['muz', 'transforms'], 'muz/rel')
-    add_lib('pdr', ['muz', 'transforms', 'arith_tactics', 'smt_tactic'], 'muz/pdr')
+    add_lib('pdr', ['muz', 'transforms', 'arith_tactics', 'core_tactics', 'smt_tactic'], 'muz/pdr')
     add_lib('clp', ['muz', 'transforms'], 'muz/clp')
     add_lib('tab', ['muz', 'transforms'], 'muz/tab')
     add_lib('bmc', ['muz', 'transforms'], 'muz/bmc')
+    add_lib('ddnf', ['muz', 'transforms', 'rel'], 'muz/ddnf')
     add_lib('duality_intf', ['muz', 'transforms', 'duality'], 'muz/duality')
-    add_lib('fp',  ['muz', 'pdr', 'clp', 'tab', 'rel', 'bmc', 'duality_intf'], 'muz/fp')
-    add_lib('smtlogic_tactics', ['arith_tactics', 'bv_tactics', 'nlsat_tactic', 'smt_tactic', 'aig_tactic', 'fp', 'muz','qe'], 'tactic/smtlogics')
+    add_lib('fp',  ['muz', 'pdr', 'clp', 'tab', 'rel', 'bmc', 'duality_intf', 'ddnf'], 'muz/fp')
+    add_lib('nlsat_smt_tactic', ['nlsat_tactic', 'smt_tactic'], 'tactic/nlsat_smt')
+    add_lib('smtlogic_tactics', ['arith_tactics', 'bv_tactics', 'nlsat_tactic', 'smt_tactic', 'aig_tactic', 'fp', 'muz','qe','nlsat_smt_tactic'], 'tactic/smtlogics')
+    add_lib('fpa_tactics', ['fpa', 'core_tactics', 'bv_tactics', 'sat_tactic', 'smt_tactic', 'arith_tactics', 'smtlogic_tactics'], 'tactic/fpa')
     add_lib('ufbv_tactic', ['normal_forms', 'core_tactics', 'macros', 'smt_tactic', 'rewriter'], 'tactic/ufbv')
-    add_lib('portfolio', ['smtlogic_tactics', 'ufbv_tactic', 'fpa_tactics', 'aig_tactic', 'fp',  'qe','sls_tactic', 'subpaving_tactic'], 'tactic/portfolio')
+    add_lib('sat_solver', ['solver', 'core_tactics', 'aig_tactic', 'bv_tactics', 'arith_tactics', 'sat_tactic'], 'sat/sat_solver')
+    add_lib('portfolio', ['smtlogic_tactics', 'sat_solver', 'ufbv_tactic', 'fpa_tactics', 'aig_tactic', 'fp',  'qe','sls_tactic', 'subpaving_tactic'], 'tactic/portfolio')
     add_lib('smtparser', ['portfolio'], 'parsers/smt')
-#    add_dll('foci2', ['util'], 'interp/foci2stub', 
-#            dll_name='foci2', 
-#            export_files=['foci2stub.cpp'])
-#    add_lib('interp', ['solver','foci2'])
+    add_lib('opt', ['smt', 'smtlogic_tactics', 'sls_tactic', 'sat_solver'], 'opt')
     API_files = ['z3_api.h', 'z3_algebraic.h', 'z3_polynomial.h', 'z3_rcf.h', 'z3_interp.h', 'z3_fpa.h']
-    add_lib('api', ['portfolio', 'user_plugin', 'smtparser', 'realclosure', 'interp'],
+    add_lib('api', ['portfolio', 'user_plugin', 'smtparser', 'realclosure', 'interp', 'opt'],
             includes2install=['z3.h', 'z3_v1.h', 'z3_macros.h'] + API_files)
-    add_exe('shell', ['api', 'sat', 'extra_cmds'], exe_name='z3')
-    add_exe('test', ['api', 'fuzzing'], exe_name='test-z3', install=False)
+    add_exe('shell', ['api', 'sat', 'extra_cmds','opt'], exe_name='z3')
+    add_exe('test', ['api', 'fuzzing', 'simplex'], exe_name='test-z3', install=False)
     add_dll('api_dll', ['api', 'sat', 'extra_cmds'], 'api/dll', 
             reexports=['api'], 
             dll_name='libz3', 

scripts/mk_util.py

@@ -85,6 +85,11 @@ VS_PAR=False
 VS_PAR_NUM=8
 GPROF=False
 GIT_HASH=False
+SLOW_OPTIMIZE=False
+USE_OMP=True
+
+FPMATH="Default"
+FPMATH_FLAGS="-mfpmath=sse -msse -msse2"
 
 def check_output(cmd):
     return str(subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]).rstrip('\r\n')
@@ -221,6 +226,8 @@ def test_foci2(cc,foci2lib):
     return exec_compiler_cmd([cc, CPPFLAGS, '-Isrc/interp', 'tstfoci2.cpp', LDFLAGS, foci2lib]) == 0
 
 def test_openmp(cc):
+    if not USE_OMP:
+        return False
     if is_verbose():
         print("Testing OpenMP...")
     t = TempFile('tstomp.cpp')
@@ -237,6 +244,27 @@ def test_openmp(cc):
     else:
         return exec_compiler_cmd([cc, CPPFLAGS, 'tstomp.cpp', LDFLAGS, '-fopenmp']) == 0
 
+def test_fpmath(cc):
+    global FPMATH_FLAGS
+    if is_verbose():
+        print("Testing floating point support...")
+    t = TempFile('tstsse.cpp')
+    t.add('int main() { return 42; }\n')
+    t.commit()
+    if exec_compiler_cmd([cc, CPPFLAGS, 'tstsse.cpp', LDFLAGS, '-mfpmath=sse -msse -msse2']) == 0:
+        FPMATH_FLAGS="-mfpmath=sse -msse -msse2"
+        return "SSE2-GCC"
+    elif exec_compiler_cmd([cc, CPPFLAGS, 'tstsse.cpp', LDFLAGS, '-msse -msse2']) == 0:
+        FPMATH_FLAGS="-msse -msse2"
+        return "SSE2-CLANG"
+    elif exec_compiler_cmd([cc, CPPFLAGS, 'tstsse.cpp', LDFLAGS, '-mfpu=vfp -mfloat-abi=hard']) == 0:
+        FPMATH_FLAGS="-mfpu=vfp -mfloat-abi=hard"
+        return "ARM-VFP"
+    else:
+        FPMATH_FLAGS=""
+        return "UNKNOWN"
+
+
 def find_jni_h(path):
     for root, dirs, files in os.walk(path):
         for f in files:
@@ -527,6 +555,8 @@ def display_help(exit_code):
         print("  -v, --vsproj                  generate Visual Studio Project Files.")
     if IS_WINDOWS:
         print("  -n, --nodotnet                do not generate Microsoft.Z3.dll make rules.")
+    if IS_WINDOWS:
+        print("  --optimize                    generate optimized code during linking.")
     print("  -j, --java                    generate Java bindings.")
     print("  --ml                          generate OCaml bindings.")
     print("  --staticlib                   build Z3 static library.")    
@@ -534,6 +564,7 @@ def display_help(exit_code):
         print("  -g, --gmp                     use GMP.")
         print("  --gprof                       enable gprof")
     print("  -f <path> --foci2=<path>          use foci2 library at path")
+    print("  --noomp                           disable OpenMP and all features that require it.")
     print("")
     print("Some influential environment variables:")
     if not IS_WINDOWS:
@@ -553,13 +584,13 @@ def display_help(exit_code):
 def parse_options():
     global VERBOSE, DEBUG_MODE, IS_WINDOWS, VS_X64, ONLY_MAKEFILES, SHOW_CPPS, VS_PROJ, TRACE, VS_PAR, VS_PAR_NUM
     global DOTNET_ENABLED, JAVA_ENABLED, ML_ENABLED, STATIC_LIB, PREFIX, GMP, FOCI2, FOCI2LIB, PYTHON_PACKAGE_DIR, GPROF, GIT_HASH
-    global LINUX_X64
+    global LINUX_X64, SLOW_OPTIMIZE, USE_OMP
     try:
         options, remainder = getopt.gnu_getopt(sys.argv[1:],
                                                'b:df:sxhmcvtnp:gj',
                                                ['build=', 'debug', 'silent', 'x64', 'help', 'makefiles', 'showcpp', 'vsproj',
                                                 'trace', 'nodotnet', 'staticlib', 'prefix=', 'gmp', 'foci2=', 'java', 'parallel=', 'gprof',
-                                                'githash=', 'x86', 'ml'])
+                                                'githash=', 'x86', 'ml', 'optimize', 'noomp'])
     except:
         print("ERROR: Invalid command line option")
         display_help(1)
@@ -594,6 +625,8 @@ def parse_options():
             DOTNET_ENABLED = False
         elif opt in ('--staticlib'):
             STATIC_LIB = True
+        elif opt in ('--optimize'):
+            SLOW_OPTIMIZE = True
         elif not IS_WINDOWS and opt in ('-p', '--prefix'):
             PREFIX = arg
             PYTHON_PACKAGE_DIR = os.path.join(PREFIX, 'lib', 'python%s' % distutils.sysconfig.get_python_version(), 'dist-packages')
@@ -616,6 +649,8 @@ def parse_options():
             GIT_HASH=arg
         elif opt in ('', '--ml'):
             ML_ENABLED = True
+        elif opt in ('', '--noomp'):
+            USE_OMP = False
         else:
             print("ERROR: Invalid command line option '%s'" % opt)
             display_help(1)
@@ -1722,7 +1757,6 @@ def mk_config():
             'OBJ_EXT=.obj\n'
             'LIB_EXT=.lib\n'
             'AR=lib\n'
-            'AR_FLAGS=/nologo /LTCG\n'
             'AR_OUTFLAG=/OUT:\n'
             'EXE_EXT=.exe\n'
             'LINK=cl\n'
@@ -1741,39 +1775,44 @@ def mk_config():
             extra_opt = ' %s /D Z3GITHASH=%s' % (extra_opt, GIT_HASH)
         if DEBUG_MODE:
             config.write(
+                'AR_FLAGS=/nologo\n'
                 'LINK_FLAGS=/nologo /MDd\n'
                 'SLINK_FLAGS=/nologo /LDd\n')
             if not VS_X64:
                 config.write(
-                    'CXXFLAGS=/c /GL /Zi /nologo /W3 /WX- /Od /Oy- /D WIN32 /D _DEBUG /D Z3DEBUG %s /D _CONSOLE /D _TRACE /D _WINDOWS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze- /arch:SSE2\n' % extra_opt)
+                    'CXXFLAGS=/c /Zi /nologo /W3 /WX- /Od /Oy- /D WIN32 /D _DEBUG /D Z3DEBUG %s /D _CONSOLE /D _TRACE /D _WINDOWS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze- /arch:SSE2\n' % extra_opt)
                 config.write(
-                    'LINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X86 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
-                    'SLINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X86 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n')
+                    'LINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X86 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
+                    'SLINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X86 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n')
             else:
                 config.write(
-                    'CXXFLAGS=/c /GL /Zi /nologo /W3 /WX- /Od /Oy- /D WIN32 /D _AMD64_ /D _DEBUG /D Z3DEBUG %s /D _CONSOLE /D _TRACE /D _WINDOWS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze-\n' % extra_opt)
+                    'CXXFLAGS=/c /Zi /nologo /W3 /WX- /Od /Oy- /D WIN32 /D _AMD64_ /D _DEBUG /D Z3DEBUG %s /D _CONSOLE /D _TRACE /D _WINDOWS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze-\n' % extra_opt)
                 config.write(
-                    'LINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
-                    'SLINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n')
+                    'LINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
+                    'SLINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n')
         else:
             # Windows Release mode
+            LTCG=' /LTCG' if SLOW_OPTIMIZE else ''
+            GL = ' /GL' if SLOW_OPTIMIZE else ''
             config.write(
+                'AR_FLAGS=/nologo%s\n'
                 'LINK_FLAGS=/nologo /MD\n'
-                'SLINK_FLAGS=/nologo /LD\n')
+                'SLINK_FLAGS=/nologo /LD\n'
+                % LTCG)
             if TRACE:
                 extra_opt = '%s /D _TRACE ' % extra_opt
             if not VS_X64:
                 config.write(
-                    'CXXFLAGS=/nologo /c /GL /Zi /W3 /WX- /O2 /Oy- /D _EXTERNAL_RELEASE /D WIN32 /D NDEBUG %s /D _CONSOLE /D _WINDOWS /D ASYNC_COMMANDS /Gm- /EHsc /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze- /arch:SSE2\n' % extra_opt)
+                    'CXXFLAGS=/nologo /c%s /Zi /W3 /WX- /O2 /Oy- /D _EXTERNAL_RELEASE /D WIN32 /D NDEBUG %s /D _CONSOLE /D _WINDOWS /D ASYNC_COMMANDS /Gm- /EHsc /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /analyze- /arch:SSE2\n' % (GL, extra_opt))
                 config.write(
-                    'LINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X86 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
-                    'SLINK_EXTRA_FLAGS=/link /LTCG /DEBUG /MACHINE:X86 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n')
+                    'LINK_EXTRA_FLAGS=/link%s /DEBUG /MACHINE:X86 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT\n'
+                    'SLINK_EXTRA_FLAGS=/link%s /DEBUG /MACHINE:X86 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO\n' % (LTCG, LTCG))
             else:
                 config.write(
-                    'CXXFLAGS=/c /GL /Zi /nologo /W3 /WX- /O2 /D _EXTERNAL_RELEASE /D WIN32 /D NDEBUG %s /D _LIB /D _WINDOWS /D _AMD64_ /D _UNICODE /D UNICODE /Gm- /EHsc /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /TP\n' % extra_opt)
+                    'CXXFLAGS=/c%s /Zi /nologo /W3 /WX- /O2 /D _EXTERNAL_RELEASE /D WIN32 /D NDEBUG %s /D _LIB /D _WINDOWS /D _AMD64_ /D _UNICODE /D UNICODE /Gm- /EHsc /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /TP\n' % (GL, extra_opt))
                 config.write(
-                    'LINK_EXTRA_FLAGS=/link /LTCG /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608\n'
-                    'SLINK_EXTRA_FLAGS=/link /LTCG /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608\n')
+                    'LINK_EXTRA_FLAGS=/link%s /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608\n'
+                    'SLINK_EXTRA_FLAGS=/link%s /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608\n' % (LTCG, LTCG))
 
         # End of Windows VS config.mk
         if is_verbose():
@@ -1787,7 +1826,7 @@ def mk_config():
                 print('OCaml Native:   %s' % OCAMLOPT)
                 print('OCaml Library:  %s' % OCAML_LIB)
     else:
-        global CXX, CC, GMP, FOCI2, CPPFLAGS, CXXFLAGS, LDFLAGS, EXAMP_DEBUG_FLAG
+        global CXX, CC, GMP, FOCI2, CPPFLAGS, CXXFLAGS, LDFLAGS, EXAMP_DEBUG_FLAG, FPMATH_FLAGS
         OS_DEFINES = ""
         ARITH = "internal"
         check_ar()
@@ -1816,9 +1855,11 @@ def mk_config():
         if GIT_HASH:
             CPPFLAGS = '%s -DZ3GITHASH=%s' % (CPPFLAGS, GIT_HASH)
         CXXFLAGS = '%s -fvisibility=hidden -c' % CXXFLAGS
+        FPMATH = test_fpmath(CXX)
+        CXXFLAGS = '%s %s' % (CXXFLAGS, FPMATH_FLAGS)
         HAS_OMP = test_openmp(CXX)
         if HAS_OMP:
-            CXXFLAGS = '%s -fopenmp -mfpmath=sse' % CXXFLAGS
+            CXXFLAGS = '%s -fopenmp' % CXXFLAGS
             LDFLAGS  = '%s -fopenmp' % LDFLAGS
             SLIBEXTRAFLAGS = '%s -fopenmp' % SLIBEXTRAFLAGS
         else:
@@ -1839,7 +1880,7 @@ def mk_config():
             SLIBFLAGS = '-dynamiclib'
         elif sysname == 'Linux':
             CXXFLAGS       = '%s -fno-strict-aliasing -D_LINUX_' % CXXFLAGS
-            OS_DEFINES     = '-D_LINUX'
+            OS_DEFINES     = '-D_LINUX_'
             SO_EXT         = '.so'
             LDFLAGS        = '%s -lrt' % LDFLAGS
             SLIBFLAGS      = '-shared'
@@ -1859,7 +1900,8 @@ def mk_config():
         else:
             raise MKException('Unsupported platform: %s' % sysname)
         if is64():
-            CXXFLAGS     = '%s -fPIC' % CXXFLAGS
+            if sysname[:6] != 'CYGWIN':
+                CXXFLAGS     = '%s -fPIC' % CXXFLAGS
             CPPFLAGS     = '%s -D_AMD64_' % CPPFLAGS
             if sysname == 'Linux':
                 CPPFLAGS = '%s -D_USE_THREAD_LOCAL' % CPPFLAGS
@@ -1871,7 +1913,6 @@ def mk_config():
             CPPFLAGS     = '%s -DZ3DEBUG' % CPPFLAGS
         if TRACE or DEBUG_MODE:
             CPPFLAGS     = '%s -D_TRACE' % CPPFLAGS
-        CXXFLAGS         = '%s -msse -msse2' % CXXFLAGS
         config.write('PREFIX=%s\n' % PREFIX)
         config.write('CC=%s\n' % CC)
         config.write('CXX=%s\n' % CXX)
@@ -1902,6 +1943,7 @@ def mk_config():
             print('OpenMP:         %s' % HAS_OMP)
             print('Prefix:         %s' % PREFIX)
             print('64-bit:         %s' % is64())
+            print('FP math:        %s' % FPMATH) 
             if GPROF:
                 print('gprof:          enabled')
             print('Python version: %s' % distutils.sysconfig.get_python_version())            

scripts/mk_win_dist.py

@@ -180,7 +180,7 @@ def mk_dist_dir_core(x64):
         mk_util.JAVA_ENABLED = JAVA_ENABLED
     mk_win_dist(build_path, dist_path)
     if is_verbose():
-        print("Generated %s distribution folder at '%s'") % (platform, dist_path)
+        print("Generated %s distribution folder at '%s'" % (platform, dist_path))
 
 def mk_dist_dir():
     mk_dist_dir_core(False)
@@ -208,7 +208,7 @@ def mk_zip_core(x64):
         ZIPOUT = zipfile.ZipFile(zfname, 'w', zipfile.ZIP_DEFLATED)
         os.path.walk(dist_path, mk_zip_visitor, '*')
         if is_verbose():
-            print("Generated '%s'") % zfname
+            print("Generated '%s'" % zfname)
     except:
         pass
     ZIPOUT = None
@@ -253,7 +253,7 @@ def cp_vs_runtime_core(x64):
     for f in VS_RUNTIME_FILES:
         shutil.copy(f, bin_dist_path)
         if is_verbose():
-            print("Copied '%s' to '%s'") % (f, bin_dist_path)
+            print("Copied '%s' to '%s'" % (f, bin_dist_path))
 
 def cp_vs_runtime():
     cp_vs_runtime_core(True)

scripts/trackall.sh

@@ -1,7 +1,9 @@
 #!/bin/bash
 
+# Copyright (c) 2015 Microsoft Corporation
 # Script for "cloning" (and tracking) all branches at codeplex.
 # On Windows, this script must be executed in the "git Bash" console.
+
 for branch in `git branch -a | grep remotes | grep -v HEAD | grep -v master`; do
     git branch --track ${branch##*/} $branch
 done

scripts/update_api.py

@@ -568,10 +568,12 @@ def mk_java():
     java_native.write('  public static class ObjArrayPtr { public long[] value; }\n')
     java_native.write('  public static class UIntArrayPtr { public int[] value; }\n')
     java_native.write('  public static native void setInternalErrorHandler(long ctx);\n\n')
-    if IS_WINDOWS or os.uname()[0]=="CYGWIN":
-        java_native.write('  static { System.loadLibrary("%s"); }\n' % get_component('java').dll_name)
-    else:
-        java_native.write('  static { System.loadLibrary("%s"); }\n' % get_component('java').dll_name[3:]) # We need 3: to extract the prexi 'lib' form the dll_name
+
+    java_native.write('  static {\n')
+    java_native.write('    try { System.loadLibrary("z3java"); }\n')
+    java_native.write('    catch (UnsatisfiedLinkError ex) { System.loadLibrary("libz3java"); }\n')
+    java_native.write('  }\n')
+
     java_native.write('\n')
     for name, result, params in _dotnet_decls:
         java_native.write('  protected static native %s INTERNAL%s(' % (type2java(result), java_method_name(name)))
@@ -1010,6 +1012,11 @@ def def_API(name, result, params):
                 log_c.write(" }\n")
                 log_c.write("  Au(a%s);\n" % sz)
                 exe_c.write("in.get_uint_array(%s)" % i)
+            elif ty == INT:
+                log_c.write("U(a%s[i]);" % i)
+                log_c.write(" }\n")
+                log_c.write("  Au(a%s);\n" % sz)
+                exe_c.write("in.get_int_array(%s)" % i)
             else:
                 error ("unsupported parameter for %s, %s" % (ty, name, p))
         elif kind == OUT_ARRAY:

scripts/update_header_guards.py

@@ -0,0 +1,71 @@
+# Copyright (c) 2015 Microsoft Corporation
+
+import os
+import re
+
+ifndef  = re.compile("#ifndef \_(.*)\_H\_")
+doubleu = re.compile("#(.*) (.*)\_\_H\_")
+defn    = re.compile("#define \_(.*)\_H\_")
+endif   = re.compile("#endif /\* \_(.*)\_H\_")
+
+
+def fix_hdr(file):
+    print file
+    tmp = "%s.tmp" % file
+    ins = open(file)
+    ous = open(tmp,'w')
+    line = ins.readline()
+    found = False
+    while line:
+	m = doubleu.search(line)
+	if m:
+	    ous.write("#")
+	    ous.write(m.group(1))
+	    ous.write(" ")
+	    ous.write(m.group(2))
+	    ous.write("_H_\n")
+	    line = ins.readline()
+	    found = True
+	    continue	    
+	m = ifndef.search(line)
+	if m:
+	    print m.group(1)
+	    ous.write("#ifndef ")
+	    ous.write(m.group(1))
+	    ous.write("_H_\n")
+	    line = ins.readline()
+	    found = True
+	    continue
+	m = defn.search(line)
+	if m:
+	    ous.write("#define ")
+	    ous.write(m.group(1))
+	    ous.write("_H_\n")
+	    line = ins.readline()
+	    found = True
+	    continue
+	m = endif.search(line)
+	if m:
+	    ous.write("#endif /* ")
+	    ous.write(m.group(1))
+	    ous.write("_H_ */\n")
+	    line = ins.readline()
+	    found = True
+	    continue
+	ous.write(line)
+	line = ins.readline()
+    ins.close()
+    ous.close()
+    if found:
+	os.system("move %s %s" % (tmp, file))
+    else:
+	os.system("del %s" % tmp)
+    
+def fixup(dir):
+    for root, dirs, files in os.walk(dir):
+	for f in files:
+	    if f.endswith('.h'):
+		path = "%s\\%s" % (root, f)
+		fix_hdr(path)
+
+fixup('src')

src/api/api_arith.cpp

@@ -47,7 +47,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_real(__in Z3_context c, int num, int den) {
+    Z3_ast Z3_API Z3_mk_real(Z3_context c, int num, int den) {
         Z3_TRY;
         LOG_Z3_mk_real(c, num, den);
         RESET_ERROR_CODE();          

src/api/api_array.cpp

@@ -83,7 +83,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
   
-    Z3_ast Z3_API Z3_mk_map(__in Z3_context c, __in Z3_func_decl f, unsigned n, __in Z3_ast const* args) {
+    Z3_ast Z3_API Z3_mk_map(Z3_context c, Z3_func_decl f, unsigned n, Z3_ast const* args) {
         Z3_TRY;
         LOG_Z3_mk_map(c, f, n, args);
         RESET_ERROR_CODE();
@@ -108,7 +108,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_const_array(__in Z3_context c, __in Z3_sort domain, __in Z3_ast v) {
+    Z3_ast Z3_API Z3_mk_const_array(Z3_context c, Z3_sort domain, Z3_ast v) {
         Z3_TRY;
         LOG_Z3_mk_const_array(c, domain, v);
         RESET_ERROR_CODE(); 
@@ -127,7 +127,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_array_default(__in Z3_context c, __in Z3_ast array) {
+    Z3_ast Z3_API Z3_mk_array_default(Z3_context c, Z3_ast array) {
         Z3_TRY;
         LOG_Z3_mk_array_default(c, array);
         RESET_ERROR_CODE(); 
@@ -142,7 +142,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast mk_app_array_core(__in Z3_context c, __in Z3_sort domain, __in Z3_ast v) {
+    Z3_ast mk_app_array_core(Z3_context c, Z3_sort domain, Z3_ast v) {
         RESET_ERROR_CODE();   
         ast_manager & m = mk_c(c)->m();
         expr * _v        = to_expr(v);
@@ -158,13 +158,13 @@ extern "C" {
         return of_ast(r);
     }
 
-    Z3_sort Z3_API Z3_mk_set_sort(__in Z3_context c, __in Z3_sort ty) {
+    Z3_sort Z3_API Z3_mk_set_sort(Z3_context c, Z3_sort ty) {
         Z3_TRY;
         return Z3_mk_array_sort(c, ty, Z3_mk_bool_sort(c));
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_empty_set(__in Z3_context c, __in Z3_sort domain) {
+    Z3_ast Z3_API Z3_mk_empty_set(Z3_context c, Z3_sort domain) {
         Z3_TRY;
         LOG_Z3_mk_empty_set(c, domain);
         RESET_ERROR_CODE();
@@ -173,7 +173,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_full_set(__in Z3_context c, __in Z3_sort domain) {
+    Z3_ast Z3_API Z3_mk_full_set(Z3_context c, Z3_sort domain) {
         Z3_TRY;
         LOG_Z3_mk_full_set(c, domain);
         RESET_ERROR_CODE();
@@ -188,15 +188,15 @@ extern "C" {
     MK_UNARY(Z3_mk_set_complement, mk_c(c)->get_array_fid(), OP_SET_COMPLEMENT, SKIP);
     MK_BINARY(Z3_mk_set_subset, mk_c(c)->get_array_fid(), OP_SET_SUBSET, SKIP);
     
-    Z3_ast Z3_mk_set_member(__in Z3_context c, __in Z3_ast elem, __in Z3_ast set) {
+    Z3_ast Z3_mk_set_member(Z3_context c, Z3_ast elem, Z3_ast set) {
         return Z3_mk_select(c, set, elem);
     }
 
-    Z3_ast Z3_mk_set_add(__in Z3_context c, __in Z3_ast set, __in Z3_ast elem) {
+    Z3_ast Z3_mk_set_add(Z3_context c, Z3_ast set, Z3_ast elem) {
         return Z3_mk_store(c, set, elem, Z3_mk_true(c));
     }
 
-    Z3_ast Z3_mk_set_del(__in Z3_context c, __in Z3_ast set, __in Z3_ast elem) {
+    Z3_ast Z3_mk_set_del(Z3_context c, Z3_ast set, Z3_ast elem) {
         return Z3_mk_store(c, set, elem, Z3_mk_false(c));
     }
 

src/api/api_ast.cpp

@@ -24,6 +24,7 @@ Revision History:
 #include"bv_decl_plugin.h"
 #include"datatype_decl_plugin.h"
 #include"array_decl_plugin.h"
+#include"pb_decl_plugin.h"
 #include"ast_translation.h"
 #include"ast_pp.h"
 #include"ast_ll_pp.h"
@@ -663,12 +664,9 @@ extern "C" {
         Z3_TRY;
         LOG_Z3_get_bool_value(c, a);
         RESET_ERROR_CODE();
+        CHECK_IS_EXPR(a, Z3_L_UNDEF);
         ast_manager & m = mk_c(c)->m();
         ast * n         = to_ast(a);
-        if (!is_expr(n)) {
-            SET_ERROR_CODE(Z3_INVALID_ARG);
-            return Z3_L_UNDEF;
-        }
         if (m.is_true(to_expr(n)))
             return Z3_L_TRUE;
         if (m.is_false(to_expr(n)))
@@ -1081,7 +1079,6 @@ extern "C" {
             case OP_BSREM_I:
             case OP_BUREM_I:
             case OP_BSMOD_I:
-
                 return Z3_OP_UNINTERPRETED;
             default:
                 UNREACHABLE();
@@ -1090,9 +1087,10 @@ extern "C" {
         }
         if (mk_c(c)->get_dt_fid() == _d->get_family_id()) {
             switch(_d->get_decl_kind()) {
-            case OP_DT_CONSTRUCTOR: return Z3_OP_DT_CONSTRUCTOR;
-            case OP_DT_RECOGNISER:  return Z3_OP_DT_RECOGNISER;
-            case OP_DT_ACCESSOR:    return Z3_OP_DT_ACCESSOR;
+            case OP_DT_CONSTRUCTOR:  return Z3_OP_DT_CONSTRUCTOR;
+            case OP_DT_RECOGNISER:   return Z3_OP_DT_RECOGNISER;
+            case OP_DT_ACCESSOR:     return Z3_OP_DT_ACCESSOR;
+            case OP_DT_UPDATE_FIELD: return Z3_OP_DT_UPDATE_FIELD;
             default:
                 UNREACHABLE();
                 return Z3_OP_UNINTERPRETED;
@@ -1186,6 +1184,15 @@ extern "C" {
             }
         }
 
+        if (mk_c(c)->get_pb_fid() == _d->get_family_id()) {
+            switch(_d->get_decl_kind()) {
+            case OP_PB_LE: return Z3_OP_PB_LE;
+            case OP_PB_GE: return Z3_OP_PB_GE;
+            case OP_AT_MOST_K: return Z3_OP_PB_AT_MOST;
+            default: UNREACHABLE();
+            }
+        }
+
         return Z3_OP_UNINTERPRETED;                
         Z3_CATCH_RETURN(Z3_OP_UNINTERPRETED);
     }

src/api/api_ast_map.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_AST_MAP_H_
-#define _API_AST_MAP_H_
+#ifndef API_AST_MAP_H_
+#define API_AST_MAP_H_
 
 #include"api_util.h"
 #include"obj_hashtable.h"

src/api/api_ast_vector.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_AST_VECTOR_H_
-#define _API_AST_VECTOR_H_
+#ifndef API_AST_VECTOR_H_
+#define API_AST_VECTOR_H_
 
 #include"api_util.h"
 

src/api/api_bv.cpp

@@ -159,7 +159,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
        This function is a shorthand for <tt>shl(1, N-1)</tt>
        where <tt>N</tt> are the number of bits of \c s.
     */
-    Z3_ast Z3_API Z3_mk_bvmsb(__in Z3_context c, __in Z3_sort s) {
+    Z3_ast Z3_API Z3_mk_bvmsb(Z3_context c, Z3_sort s) {
         Z3_TRY;
         RESET_ERROR_CODE();
         // Not logging this one, since it is just syntax sugar.
@@ -179,19 +179,19 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_mk_bvsmin(__in Z3_context c, __in Z3_sort s) {
+    Z3_ast Z3_mk_bvsmin(Z3_context c, Z3_sort s) {
         return Z3_mk_bvmsb(c, s);
     }
 
-    Z3_ast Z3_mk_bvsmax(__in Z3_context c, __in Z3_sort s) {
+    Z3_ast Z3_mk_bvsmax(Z3_context c, Z3_sort s) {
         return Z3_mk_bvnot(c, Z3_mk_bvmsb(c, s));
     }
 
-    Z3_ast Z3_mk_bvumax(__in Z3_context c, __in Z3_sort s) {
+    Z3_ast Z3_mk_bvumax(Z3_context c, Z3_sort s) {
         return Z3_mk_int(c, -1, s);
     }
 
-    Z3_ast Z3_API Z3_mk_bvadd_no_overflow(__in Z3_context c, __in Z3_ast t1, __in Z3_ast t2, Z3_bool is_signed) {
+    Z3_ast Z3_API Z3_mk_bvadd_no_overflow(Z3_context c, Z3_ast t1, Z3_ast t2, Z3_bool is_signed) {
         Z3_TRY;
         RESET_ERROR_CODE();
         if (is_signed) {
@@ -235,7 +235,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
     }
 
     // only for signed machine integers
-    Z3_ast Z3_API Z3_mk_bvadd_no_underflow(__in Z3_context c, __in Z3_ast t1, __in Z3_ast t2) {
+    Z3_ast Z3_API Z3_mk_bvadd_no_underflow(Z3_context c, Z3_ast t1, Z3_ast t2) {
         Z3_TRY;
         RESET_ERROR_CODE();
         Z3_ast zero = Z3_mk_int(c, 0, Z3_get_sort(c, t1));
@@ -263,7 +263,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
     }
 
     // only for signed machine integers
-    Z3_ast Z3_API Z3_mk_bvsub_no_overflow(__in Z3_context c, __in Z3_ast t1, __in Z3_ast t2) {
+    Z3_ast Z3_API Z3_mk_bvsub_no_overflow(Z3_context c, Z3_ast t1, Z3_ast t2) {
         Z3_TRY;
         RESET_ERROR_CODE();
         Z3_ast minus_t2 = Z3_mk_bvneg(c, t2);
@@ -291,7 +291,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_bvsub_no_underflow(__in Z3_context c, __in Z3_ast t1, __in Z3_ast t2, Z3_bool is_signed) {
+    Z3_ast Z3_API Z3_mk_bvsub_no_underflow(Z3_context c, Z3_ast t1, Z3_ast t2, Z3_bool is_signed) {
         Z3_TRY;
         RESET_ERROR_CODE();
         if (is_signed) {
@@ -316,7 +316,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_ast Z3_API Z3_mk_bvmul_no_overflow(__in Z3_context c, __in Z3_ast n1, __in Z3_ast n2, Z3_bool is_signed) {
+    Z3_ast Z3_API Z3_mk_bvmul_no_overflow(Z3_context c, Z3_ast n1, Z3_ast n2, Z3_bool is_signed) {
         LOG_Z3_mk_bvmul_no_overflow(c, n1, n2, is_signed);
         RESET_ERROR_CODE();
         if (is_signed) {
@@ -328,13 +328,13 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
     }
 
     // only for signed machine integers
-    Z3_ast Z3_API Z3_mk_bvmul_no_underflow(__in Z3_context c, __in Z3_ast n1, __in Z3_ast n2) {
+    Z3_ast Z3_API Z3_mk_bvmul_no_underflow(Z3_context c, Z3_ast n1, Z3_ast n2) {
         LOG_Z3_mk_bvmul_no_underflow(c, n1, n2);
         MK_BINARY_BODY(Z3_mk_bvmul_no_underflow, mk_c(c)->get_bv_fid(), OP_BSMUL_NO_UDFL, SKIP);
     }
 
     // only for signed machine integers
-    Z3_ast Z3_API Z3_mk_bvneg_no_overflow(__in Z3_context c, __in Z3_ast t) {
+    Z3_ast Z3_API Z3_mk_bvneg_no_overflow(Z3_context c, Z3_ast t) {
         Z3_TRY;
         RESET_ERROR_CODE();
         Z3_ast min = Z3_mk_bvsmin(c, Z3_get_sort(c, t));
@@ -346,7 +346,7 @@ Z3_ast Z3_API NAME(Z3_context c, unsigned i, Z3_ast n) {                \
     }
     
     // only for signed machine integers
-    Z3_ast Z3_API Z3_mk_bvsdiv_no_overflow(__in Z3_context c, __in Z3_ast t1, __in Z3_ast t2) {
+    Z3_ast Z3_API Z3_mk_bvsdiv_no_overflow(Z3_context c, Z3_ast t1, Z3_ast t2) {
         Z3_TRY;
         RESET_ERROR_CODE();
         Z3_sort s = Z3_get_sort(c, t1);

src/api/api_config_params.cpp

@@ -37,9 +37,7 @@ extern "C" {
         catch (z3_exception & ex) {
             // The error handler is only available for contexts
             // Just throw a warning.
-            std::ostringstream buffer;
-            buffer << "Error setting " << param_id << ", " << ex.msg();
-            warning_msg(buffer.str().c_str());
+            warning_msg(ex.msg());
         }
     }
 
@@ -64,9 +62,7 @@ extern "C" {
         catch (z3_exception & ex) {
             // The error handler is only available for contexts
             // Just throw a warning.
-            std::ostringstream buffer;
-            buffer << "Error setting " << param_id << ": " << ex.msg();
-            warning_msg(buffer.str().c_str());
+            warning_msg(ex.msg());
             return Z3_FALSE;
         }
     }
@@ -92,9 +88,7 @@ extern "C" {
         catch (z3_exception & ex) {
             // The error handler is only available for contexts
             // Just throw a warning.
-            std::ostringstream buffer;
-            buffer << "Error setting " << param_id << ": " << ex.msg();
-            warning_msg(buffer.str().c_str());
+            warning_msg(ex.msg());
         }
     }
 

src/api/api_context.cpp

@@ -89,7 +89,7 @@ namespace api {
         m_bv_util(m()),
         m_datalog_util(m()),
         m_fpa_util(m()),
-	m_dtutil(m()),
+        m_dtutil(m()),
         m_last_result(m()),
         m_ast_trail(m()),
         m_replay_stack() {
@@ -111,6 +111,7 @@ namespace api {
         m_basic_fid = m().get_basic_family_id();
         m_arith_fid = m().mk_family_id("arith");
         m_bv_fid    = m().mk_family_id("bv");
+        m_pb_fid    = m().mk_family_id("pb");
         m_array_fid = m().mk_family_id("array");
         m_dt_fid    = m().mk_family_id("datatype");
         m_datalog_fid = m().mk_family_id("datalog_relation");
@@ -515,6 +516,11 @@ extern "C" {
         memory::initialize(0);
     }
 
+    void Z3_API Z3_finalize_memory(void) {
+        LOG_Z3_finalize_memory();
+        memory::finalize();
+    }
+
     Z3_error_code Z3_API Z3_get_error_code(Z3_context c) {
         LOG_Z3_get_error_code(c);
         return mk_c(c)->get_error_code();
@@ -526,7 +532,7 @@ extern "C" {
         // [Leo]: using exception handling, we don't need global error handlers anymore
     }
 
-    void Z3_API Z3_set_error(__in Z3_context c, __in Z3_error_code e) {
+    void Z3_API Z3_set_error(Z3_context c, Z3_error_code e) {
         SET_ERROR_CODE(e);
     }
 
@@ -578,7 +584,7 @@ extern "C" {
     
 };
 
-Z3_API ast_manager& Z3_get_manager(__in Z3_context c) {
+Z3_API ast_manager& Z3_get_manager(Z3_context c) {
     return mk_c(c)->m();
 }
 

src/api/api_context.h

@@ -17,8 +17,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_CONTEXT_H_
-#define _API_CONTEXT_H_
+#ifndef API_CONTEXT_H_
+#define API_CONTEXT_H_
 
 #include"z3.h"
 #include"ast.h"
@@ -78,6 +78,7 @@ namespace api {
         family_id                  m_bv_fid;
         family_id                  m_dt_fid;
         family_id                  m_datalog_fid;
+        family_id                  m_pb_fid;
         family_id                  m_fpa_fid;
         datatype_decl_plugin *     m_dt_plugin;
         
@@ -116,6 +117,7 @@ namespace api {
         bool produce_unsat_cores() const { return m_params.m_unsat_core; }
         bool use_auto_config() const { return m_params.m_auto_config; }
         unsigned get_timeout() const { return m_params.m_timeout; }
+        unsigned get_rlimit() const { return m_params.m_rlimit; }
         arith_util & autil() { return m_arith_util; }
         bv_util & bvutil() { return m_bv_util; }
         datalog::dl_decl_util & datalog_util() { return m_datalog_util; }
@@ -127,6 +129,7 @@ namespace api {
         family_id get_bv_fid() const { return m_bv_fid; }
         family_id get_dt_fid() const { return m_dt_fid; }
         family_id get_datalog_fid() const { return m_datalog_fid; }
+        family_id get_pb_fid() const { return m_pb_fid; }
         family_id get_fpa_fid() const { return m_fpa_fid; }
         datatype_decl_plugin * get_dt_plugin() const { return m_dt_plugin; }
 
@@ -242,6 +245,7 @@ inline api::context * mk_c(Z3_context c) { return reinterpret_cast<api::context*
 #define CHECK_VALID_AST(_a_, _ret_) { if (_a_ == 0 || !CHECK_REF_COUNT(_a_)) { SET_ERROR_CODE(Z3_INVALID_ARG); return _ret_; } }
 #define CHECK_SEARCHING(c) mk_c(c)->check_searching();
 inline bool is_expr(Z3_ast a) { return is_expr(to_ast(a)); }
+#define CHECK_IS_EXPR(_p_, _ret_) { if (!is_expr(_p_)) { SET_ERROR_CODE(Z3_INVALID_ARG); return _ret_; } }
 inline bool is_bool_expr(Z3_context c, Z3_ast a) { return is_expr(a) && mk_c(c)->m().is_bool(to_expr(a)); }
 #define CHECK_FORMULA(_a_, _ret_) { if (_a_ == 0 || !CHECK_REF_COUNT(_a_) || !is_bool_expr(c, _a_)) { SET_ERROR_CODE(Z3_INVALID_ARG); return _ret_; } }
 inline void check_sorts(Z3_context c, ast * n) { mk_c(c)->check_sorts(n); }

src/api/api_datalog.cpp

@@ -125,7 +125,7 @@ namespace api {
                 return "unknown";
             }
         }
-        std::string to_string(unsigned num_queries, expr*const* queries) {
+        std::string to_string(unsigned num_queries, expr* const* queries) {
             std::stringstream str;
             m_context.display_smt2(num_queries, queries, str);
             return str.str();
@@ -287,9 +287,11 @@ extern "C" {
         lbool r = l_undef;
         cancel_eh<api::fixedpoint_context> eh(*to_fixedpoint_ref(d));
         unsigned timeout = to_fixedpoint(d)->m_params.get_uint("timeout", mk_c(c)->get_timeout());
+        unsigned rlimit  = to_fixedpoint(d)->m_params.get_uint("rlimit", mk_c(c)->get_rlimit());
         api::context::set_interruptable si(*(mk_c(c)), eh);        
         {
             scoped_timer timer(timeout, &eh);
+            scoped_rlimit _rlimit(mk_c(c)->m().limit(), rlimit);
             try {
                 r = to_fixedpoint_ref(d)->ctx().query(to_expr(q));
             }
@@ -304,8 +306,8 @@ extern "C" {
     }
 
     Z3_lbool Z3_API Z3_fixedpoint_query_relations(
-        __in Z3_context c,__in Z3_fixedpoint d, 
-        __in unsigned num_relations, Z3_func_decl const relations[]) {
+        Z3_context c,Z3_fixedpoint d, 
+        unsigned num_relations, Z3_func_decl const relations[]) {
         Z3_TRY;
         LOG_Z3_fixedpoint_query_relations(c, d, num_relations, relations);
         RESET_ERROR_CODE();
@@ -466,13 +468,16 @@ extern "C" {
         ast_manager& m = mk_c(c)->m();
         Z3_ast_vector_ref* v = alloc(Z3_ast_vector_ref, m);
         mk_c(c)->save_object(v);
-        expr_ref_vector rules(m);
+        expr_ref_vector rules(m), queries(m);
         svector<symbol> names;
         
-        to_fixedpoint_ref(d)->ctx().get_rules_as_formulas(rules, names);
+        to_fixedpoint_ref(d)->ctx().get_rules_as_formulas(rules, queries, names);
         for (unsigned i = 0; i < rules.size(); ++i) {
             v->m_ast_vector.push_back(rules[i].get());
         }
+        for (unsigned i = 0; i < queries.size(); ++i) {
+            v->m_ast_vector.push_back(m.mk_not(queries[i].get()));
+        }
         RETURN_Z3(of_ast_vector(v));
         Z3_CATCH_RETURN(0);
     }

src/api/api_datalog.h

@@ -16,8 +16,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_DATALOG_H_
-#define _API_DATALOG_H_
+#ifndef API_DATALOG_H_
+#define API_DATALOG_H_
 
 #include"z3.h"
 #include"ast.h"

src/api/api_datatype.cpp

@@ -476,7 +476,7 @@ extern "C" {
             return 0;
         }
         ptr_vector<func_decl> const * decls = dt_util.get_datatype_constructors(_t);
-        if (idx >= decls->size()) {
+        if (!decls || idx >= decls->size()) {
             SET_ERROR_CODE(Z3_INVALID_ARG);
             return 0;
         }
@@ -506,9 +506,9 @@ extern "C" {
             RETURN_Z3(0);
         }
         ptr_vector<func_decl> const * decls = dt_util.get_datatype_constructors(_t);
-        if (idx >= decls->size()) {
+        if (!decls || idx >= decls->size()) {
             SET_ERROR_CODE(Z3_INVALID_ARG);
-            return 0;
+            RETURN_Z3(0);
         }
         func_decl* decl = (*decls)[idx];
         decl = dt_util.get_constructor_recognizer(decl);
@@ -529,7 +529,7 @@ extern "C" {
             RETURN_Z3(0);            
         }
         ptr_vector<func_decl> const * decls = dt_util.get_datatype_constructors(_t);
-        if (idx_c >= decls->size()) {
+        if (!decls || idx_c >= decls->size()) {
             SET_ERROR_CODE(Z3_INVALID_ARG);
             return 0;
         }
@@ -618,4 +618,25 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
+    Z3_ast Z3_datatype_update_field(
+        Z3_context c,  Z3_func_decl f, Z3_ast t, Z3_ast v) {        
+        Z3_TRY;
+        LOG_Z3_datatype_update_field(c, f, t, v);
+        RESET_ERROR_CODE();
+        ast_manager & m = mk_c(c)->m();
+        func_decl* _f      = to_func_decl(f);
+        expr* _t = to_expr(t);
+        expr* _v = to_expr(v);  
+        expr* args[2] = { _t, _v };
+        sort* domain[2] = { m.get_sort(_t), m.get_sort(_v) };
+        parameter param(_f);
+        func_decl * d = m.mk_func_decl(mk_c(c)->get_array_fid(), OP_DT_UPDATE_FIELD, 1, &param, 2, domain);
+        app* r = m.mk_app(d, 2, args);
+        mk_c(c)->save_ast_trail(r);
+        check_sorts(c, r);
+        RETURN_Z3(of_ast(r));
+        Z3_CATCH_RETURN(0);
+    }
+
+
 };

src/api/api_fpa.cpp

@@ -712,7 +712,7 @@ extern "C" {
 
     unsigned Z3_API Z3_fpa_get_sbits(Z3_context c, Z3_sort s) {
         Z3_TRY;
-        LOG_Z3_fpa_get_ebits(c, s);
+        LOG_Z3_fpa_get_sbits(c, s);
         RESET_ERROR_CODE();
         CHECK_NON_NULL(s, 0);
         return mk_c(c)->fpautil().get_sbits(to_sort(s));
@@ -737,7 +737,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_string Z3_API Z3_fpa_get_numeral_significand_string(__in Z3_context c, __in Z3_ast t) {
+    Z3_string Z3_API Z3_fpa_get_numeral_significand_string(Z3_context c, Z3_ast t) {
         Z3_TRY;
         LOG_Z3_fpa_get_numeral_significand_string(c, t);
         RESET_ERROR_CODE();
@@ -765,10 +765,33 @@ extern "C" {
         mpqm.display_decimal(ss, q, sbits);
         return mk_c(c)->mk_external_string(ss.str());
         Z3_CATCH_RETURN("");
-
     }
 
-    Z3_string Z3_API Z3_fpa_get_numeral_exponent_string(__in Z3_context c, __in Z3_ast t) {
+    Z3_bool Z3_API Z3_fpa_get_numeral_significand_uint64(Z3_context c, Z3_ast t, __uint64 * n) {
+        Z3_TRY;
+        LOG_Z3_fpa_get_numeral_significand_uint64(c, t, n);
+        RESET_ERROR_CODE();
+        ast_manager & m = mk_c(c)->m();
+        mpf_manager & mpfm = mk_c(c)->fpautil().fm();
+        unsynch_mpz_manager & mpzm = mpfm.mpz_manager();
+        fpa_decl_plugin * plugin = (fpa_decl_plugin*)m.get_plugin(mk_c(c)->get_fpa_fid());
+        scoped_mpf val(mpfm);
+        bool r = plugin->is_numeral(to_expr(t), val);
+        if (!r) {
+            SET_ERROR_CODE(Z3_INVALID_ARG);
+            return 0;
+        }
+        const mpz & z = mpfm.sig(val);
+        if (!mpzm.is_uint64(z)) {
+            SET_ERROR_CODE(Z3_INVALID_ARG);
+            return 0;
+        }
+        *n = mpzm.get_uint64(z);
+        return 1;
+        Z3_CATCH_RETURN(0);
+    }
+
+    Z3_string Z3_API Z3_fpa_get_numeral_exponent_string(Z3_context c, Z3_ast t) {
         Z3_TRY;
         LOG_Z3_fpa_get_numeral_exponent_string(c, t);
         RESET_ERROR_CODE();
@@ -792,9 +815,9 @@ extern "C" {
         Z3_CATCH_RETURN("");
     }
 
-    Z3_bool Z3_API Z3_fpa_get_numeral_exponent_int64(__in Z3_context c, __in Z3_ast t, __out __int64 * n) {
+    Z3_bool Z3_API Z3_fpa_get_numeral_exponent_int64(Z3_context c, Z3_ast t, __int64 * n) {
         Z3_TRY;
-        LOG_Z3_fpa_get_numeral_exponent_string(c, t);
+        LOG_Z3_fpa_get_numeral_exponent_int64(c, t, n);
         RESET_ERROR_CODE();
         ast_manager & m = mk_c(c)->m();
         mpf_manager & mpfm = mk_c(c)->fpautil().fm();
@@ -815,7 +838,7 @@ extern "C" {
         LOG_Z3_mk_fpa_to_ieee_bv(c, t);
         RESET_ERROR_CODE();
         api::context * ctx = mk_c(c);
-        Z3_ast r = of_ast(ctx->fpautil().mk_float_to_ieee_bv(to_expr(t)));
+        Z3_ast r = of_ast(ctx->fpautil().mk_to_ieee_bv(to_expr(t)));
         RETURN_Z3(r);
         Z3_CATCH_RETURN(0);
     }

src/api/api_goal.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_GOAL_H_
-#define _API_GOAL_H_
+#ifndef API_GOAL_H_
+#define API_GOAL_H_
 
 #include"api_util.h"
 #include"goal.h"

src/api/api_interp.cpp

@@ -207,7 +207,7 @@ extern "C" {
         opts->map[name] = value;
     }
 
-    Z3_ast_vector Z3_API Z3_get_interpolant(__in Z3_context c, __in Z3_ast pf, __in Z3_ast pat, __in Z3_params p){
+    Z3_ast_vector Z3_API Z3_get_interpolant(Z3_context c, Z3_ast pf, Z3_ast pat, Z3_params p){
         Z3_TRY;
         LOG_Z3_get_interpolant(c, pf, pat, p);
         RESET_ERROR_CODE();
@@ -240,7 +240,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    Z3_lbool Z3_API Z3_compute_interpolant(__in Z3_context c, __in Z3_ast pat, __in Z3_params p, __out Z3_ast_vector *out_interp, __out Z3_model *model){
+    Z3_lbool Z3_API Z3_compute_interpolant(Z3_context c, Z3_ast pat, Z3_params p, Z3_ast_vector *out_interp, Z3_model *model){
         Z3_TRY;
         LOG_Z3_compute_interpolant(c, pat, p, out_interp, model);
         RESET_ERROR_CODE();
@@ -290,10 +290,10 @@ extern "C" {
             }
         }
         else {
-            model_ref _m;
-            m_solver.get()->get_model(_m);
+            model_ref mr;
+            m_solver.get()->get_model(mr);
             Z3_model_ref *tmp_val = alloc(Z3_model_ref);
-            tmp_val->m_model = _m.get();
+            tmp_val->m_model = mr.get();
             mk_c(c)->save_object(tmp_val);
             *model = of_model(tmp_val);
         }
@@ -708,15 +708,15 @@ extern "C" {
     def_API('Z3_interpolate', BOOL, (_in(CONTEXT), _in(UINT), _in_array(1, AST), _in_array(1, UINT), _in(PARAMS), _out_array(1, AST), _out(MODEL), _out(LITERALS), _in(UINT), _in(UINT), _in_array(9, AST)))
 */
 
-Z3_lbool Z3_API Z3_interpolate(__in Z3_context ctx,
-                               __in unsigned num,
-                               __in_ecount(num) Z3_ast *cnsts,
-                               __in_ecount(num) unsigned *parents,
-                               __in Z3_params options,
-                               __out_ecount(num - 1) Z3_ast *interps,
-                               __out Z3_model *model,
-                               __out Z3_literals *labels,
-                               __in unsigned incremental,
-                               __in unsigned num_theory,
-                               __in_ecount(num_theory) Z3_ast *theory);
+Z3_lbool Z3_API Z3_interpolate(Z3_context ctx,
+                               unsigned num,
+                               Z3_ast *cnsts,
+                               unsigned *parents,
+                               Z3_params options,
+                               Z3_ast *interps,
+                               Z3_model *model,
+                               Z3_literals *labels,
+                               unsigned incremental,
+                               unsigned num_theory,
+                               Z3_ast *theory);
 #endif

src/api/api_model.cpp

@@ -153,6 +153,7 @@ extern "C" {
         if (v) *v = 0;
         RESET_ERROR_CODE();
         CHECK_NON_NULL(m, Z3_FALSE);
+        CHECK_IS_EXPR(t, Z3_FALSE);
         model * _m = to_model_ref(m);
         expr_ref result(mk_c(c)->m());
         _m->eval(to_expr(t), result, model_completion == Z3_TRUE);

src/api/api_model.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_MODEL_H_
-#define _API_MODEL_H_
+#ifndef API_MODEL_H_
+#define API_MODEL_H_
 
 #include"api_util.h"
 #include"model.h"

src/api/api_opt.cpp

@@ -0,0 +1,251 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    api_opt.cpp
+
+Abstract:
+    API for optimization 
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2013-12-3.
+
+Revision History:
+
+--*/
+#include<iostream>
+#include"z3.h"
+#include"api_log_macros.h"
+#include"api_stats.h"
+#include"api_context.h"
+#include"api_util.h"
+#include"api_model.h"
+#include"opt_context.h"
+#include"cancel_eh.h"
+#include"scoped_timer.h"
+
+
+extern "C" {
+
+    struct Z3_optimize_ref : public api::object {
+        opt::context* m_opt;
+        Z3_optimize_ref():m_opt(0) {}
+        virtual ~Z3_optimize_ref() { dealloc(m_opt); }
+    };
+    inline Z3_optimize_ref * to_optimize(Z3_optimize o) { return reinterpret_cast<Z3_optimize_ref *>(o); }
+    inline Z3_optimize of_optimize(Z3_optimize_ref * o) { return reinterpret_cast<Z3_optimize>(o); }
+    inline opt::context* to_optimize_ptr(Z3_optimize o) { return to_optimize(o)->m_opt; }
+
+    Z3_optimize Z3_API Z3_mk_optimize(Z3_context c) {
+        Z3_TRY;
+        LOG_Z3_mk_optimize(c);
+        RESET_ERROR_CODE();
+        Z3_optimize_ref * o = alloc(Z3_optimize_ref);
+        o->m_opt = alloc(opt::context,mk_c(c)->m());
+        mk_c(c)->save_object(o);
+        RETURN_Z3(of_optimize(o));
+        Z3_CATCH_RETURN(0);
+    }
+
+    void Z3_API Z3_optimize_inc_ref(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_inc_ref(c, o);
+        RESET_ERROR_CODE();
+        to_optimize(o)->inc_ref();
+        Z3_CATCH;
+    }
+
+    void Z3_API Z3_optimize_dec_ref(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_dec_ref(c, o);
+        RESET_ERROR_CODE();
+        to_optimize(o)->dec_ref();
+        Z3_CATCH;
+    }
+    
+    void Z3_API Z3_optimize_assert(Z3_context c, Z3_optimize o, Z3_ast a) {
+        Z3_TRY;
+        LOG_Z3_optimize_assert(c, o, a);
+        RESET_ERROR_CODE();
+        CHECK_FORMULA(a,);        
+        to_optimize_ptr(o)->add_hard_constraint(to_expr(a));
+        Z3_CATCH;
+    }
+
+    unsigned Z3_API Z3_optimize_assert_soft(Z3_context c, Z3_optimize o, Z3_ast a, Z3_string weight, Z3_symbol id) {
+        Z3_TRY;
+        LOG_Z3_optimize_assert_soft(c, o, a, weight, id);
+        RESET_ERROR_CODE();
+        CHECK_FORMULA(a,0);        
+        rational w(weight);
+        return to_optimize_ptr(o)->add_soft_constraint(to_expr(a), w, to_symbol(id));
+        Z3_CATCH_RETURN(0);
+    }
+
+    unsigned Z3_API Z3_optimize_maximize(Z3_context c, Z3_optimize o, Z3_ast t) {
+        Z3_TRY;
+        LOG_Z3_optimize_maximize(c, o, t);
+        RESET_ERROR_CODE();
+        CHECK_VALID_AST(t,0);        
+        return to_optimize_ptr(o)->add_objective(to_app(t), true);
+        Z3_CATCH_RETURN(0);
+    }
+
+    unsigned Z3_API Z3_optimize_minimize(Z3_context c, Z3_optimize o, Z3_ast t) {
+        Z3_TRY;
+        LOG_Z3_optimize_minimize(c, o, t);
+        RESET_ERROR_CODE();
+        CHECK_VALID_AST(t,0);        
+        return to_optimize_ptr(o)->add_objective(to_app(t), false);
+        Z3_CATCH_RETURN(0);
+    }
+
+    void Z3_API Z3_optimize_push(Z3_context c,Z3_optimize d) {
+        Z3_TRY;
+        LOG_Z3_optimize_push(c, d);
+        RESET_ERROR_CODE();
+        to_optimize_ptr(d)->push();
+        Z3_CATCH;
+    }
+
+    void Z3_API Z3_optimize_pop(Z3_context c,Z3_optimize d) {
+        Z3_TRY;
+        LOG_Z3_optimize_pop(c, d);
+        RESET_ERROR_CODE();
+        to_optimize_ptr(d)->pop(1);
+        Z3_CATCH;
+    }
+
+
+    Z3_lbool Z3_API Z3_optimize_check(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_check(c, o);
+        RESET_ERROR_CODE();
+        lbool r = l_undef;
+        cancel_eh<opt::context> eh(*to_optimize_ptr(o));
+        unsigned timeout = to_optimize_ptr(o)->get_params().get_uint("timeout", mk_c(c)->get_timeout());
+        api::context::set_interruptable si(*(mk_c(c)), eh);        
+        {
+            scoped_timer timer(timeout, &eh);
+            try {
+                r = to_optimize_ptr(o)->optimize();
+            }
+            catch (z3_exception& ex) {
+                mk_c(c)->handle_exception(ex);
+                r = l_undef;
+            }
+            // to_optimize_ref(d).cleanup();
+        }
+        return of_lbool(r);
+        Z3_CATCH_RETURN(Z3_L_UNDEF);
+    }
+
+    Z3_string Z3_API Z3_optimize_get_reason_unknown(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_to_string(c, o);
+        RESET_ERROR_CODE();
+        return mk_c(c)->mk_external_string(to_optimize_ptr(o)->reason_unknown());
+        Z3_CATCH_RETURN("");
+    }
+
+    Z3_model Z3_API Z3_optimize_get_model(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_model(c, o);
+        RESET_ERROR_CODE();
+        model_ref _m;
+        to_optimize_ptr(o)->get_model(_m);
+        Z3_model_ref * m_ref = alloc(Z3_model_ref); 
+        if (_m) {
+            m_ref->m_model = _m;
+        }
+        else {
+            m_ref->m_model = alloc(model, mk_c(c)->m());
+        }
+        mk_c(c)->save_object(m_ref);
+        RETURN_Z3(of_model(m_ref));
+        Z3_CATCH_RETURN(0);
+    }
+
+    void Z3_API Z3_optimize_set_params(Z3_context c, Z3_optimize o, Z3_params p) {
+        Z3_TRY;
+        LOG_Z3_optimize_set_params(c, o, p);
+        RESET_ERROR_CODE();
+        param_descrs descrs;
+        to_optimize_ptr(o)->collect_param_descrs(descrs);
+        to_params(p)->m_params.validate(descrs);
+        params_ref pr = to_param_ref(p);
+        to_optimize_ptr(o)->updt_params(pr);
+        Z3_CATCH;
+    }
+    
+    Z3_param_descrs Z3_API Z3_optimize_get_param_descrs(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_param_descrs(c, o);
+        RESET_ERROR_CODE();
+        Z3_param_descrs_ref * d = alloc(Z3_param_descrs_ref);
+        mk_c(c)->save_object(d);
+        to_optimize_ptr(o)->collect_param_descrs(d->m_descrs);
+        Z3_param_descrs r = of_param_descrs(d);
+        RETURN_Z3(r);
+        Z3_CATCH_RETURN(0);
+    }
+    
+    // get lower value or current approximation
+    Z3_ast Z3_API Z3_optimize_get_lower(Z3_context c, Z3_optimize o, unsigned idx) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_lower(c, o, idx);
+        RESET_ERROR_CODE();
+        expr_ref e = to_optimize_ptr(o)->get_lower(idx);
+        mk_c(c)->save_ast_trail(e);
+        RETURN_Z3(of_expr(e));
+        Z3_CATCH_RETURN(0);
+    }
+
+    // get upper or current approximation
+    Z3_ast Z3_API Z3_optimize_get_upper(Z3_context c, Z3_optimize o, unsigned idx) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_upper(c, o, idx);
+        RESET_ERROR_CODE();
+        expr_ref e = to_optimize_ptr(o)->get_upper(idx);
+        mk_c(c)->save_ast_trail(e);
+        RETURN_Z3(of_expr(e));
+        Z3_CATCH_RETURN(0);
+    }
+
+    Z3_string Z3_API Z3_optimize_to_string(Z3_context c, Z3_optimize o) {
+        Z3_TRY;
+        LOG_Z3_optimize_to_string(c, o);
+        RESET_ERROR_CODE();
+        return mk_c(c)->mk_external_string(to_optimize_ptr(o)->to_string());
+        Z3_CATCH_RETURN("");
+    }
+
+    Z3_string Z3_API Z3_optimize_get_help(Z3_context c, Z3_optimize d) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_help(c, d);
+        RESET_ERROR_CODE();
+        std::ostringstream buffer;
+        param_descrs descrs;
+        to_optimize_ptr(d)->collect_param_descrs(descrs);
+        descrs.display(buffer);
+        return mk_c(c)->mk_external_string(buffer.str());
+        Z3_CATCH_RETURN("");
+    }
+
+    Z3_stats Z3_API Z3_optimize_get_statistics(Z3_context c,Z3_optimize d) {
+        Z3_TRY;
+        LOG_Z3_optimize_get_statistics(c, d);
+        RESET_ERROR_CODE();
+        Z3_stats_ref * st = alloc(Z3_stats_ref);
+        to_optimize_ptr(d)->collect_statistics(st->m_stats);
+        mk_c(c)->save_object(st);
+        Z3_stats r = of_stats(st);
+        RETURN_Z3(r);
+        Z3_CATCH_RETURN(0);
+    }
+
+
+
+};

src/api/api_pb.cpp

@@ -0,0 +1,61 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    api_pb.cpp
+
+Abstract:
+    API for pb theory
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2013-11-13.
+
+Revision History:
+
+--*/
+#include<iostream>
+#include"z3.h"
+#include"api_log_macros.h"
+#include"api_context.h"
+#include"api_util.h"
+#include"pb_decl_plugin.h"
+
+extern "C" {
+    
+    Z3_ast Z3_API Z3_mk_atmost(Z3_context c, unsigned num_args, 
+                               Z3_ast const args[], unsigned k) {
+        Z3_TRY;
+        LOG_Z3_mk_atmost(c, num_args, args, k);
+        RESET_ERROR_CODE();
+        parameter param(k);
+        pb_util util(mk_c(c)->m());
+        ast* a = util.mk_at_most_k(num_args, to_exprs(args), k);
+        mk_c(c)->save_ast_trail(a);
+        check_sorts(c, a);
+        RETURN_Z3(of_ast(a));
+        Z3_CATCH_RETURN(0);
+    }
+
+
+    Z3_ast Z3_API Z3_mk_pble(Z3_context c, unsigned num_args, 
+                             Z3_ast const args[], int _coeffs[],
+                             int k) {
+        Z3_TRY;
+        LOG_Z3_mk_pble(c, num_args, args, _coeffs, k);
+        RESET_ERROR_CODE();
+        pb_util util(mk_c(c)->m());
+        vector<rational> coeffs;
+        for (unsigned i = 0; i < num_args; ++i) {
+            coeffs.push_back(rational(_coeffs[i]));
+        }
+        ast* a = util.mk_le(num_args, coeffs.c_ptr(), to_exprs(args), rational(k));
+        mk_c(c)->save_ast_trail(a);
+        check_sorts(c, a);
+        RETURN_Z3(of_ast(a));
+        Z3_CATCH_RETURN(0);
+    }
+
+
+};

src/api/api_polynomial.h

@@ -16,8 +16,8 @@ Author:
 Notes:
     
 --*/
-#ifndef _API_POLYNOMIAL_H_
-#define _API_POLYNOMIAL_H_
+#ifndef API_POLYNOMIAL_H_
+#define API_POLYNOMIAL_H_
 
 #include"polynomial.h"
 

src/api/api_solver.cpp

@@ -254,6 +254,7 @@ extern "C" {
         }
         expr * const * _assumptions = to_exprs(assumptions);
         unsigned timeout     = to_solver(s)->m_params.get_uint("timeout", mk_c(c)->get_timeout());
+        unsigned rlimit      = to_solver(s)->m_params.get_uint("rlimit", mk_c(c)->get_rlimit());
         bool     use_ctrl_c  = to_solver(s)->m_params.get_bool("ctrl_c", false);
         cancel_eh<solver> eh(*to_solver_ref(s));
         api::context::set_interruptable si(*(mk_c(c)), eh);
@@ -261,6 +262,7 @@ extern "C" {
         {
             scoped_ctrl_c ctrlc(eh, false, use_ctrl_c);
             scoped_timer timer(timeout, &eh);
+            scoped_rlimit _rlimit(mk_c(c)->m().limit(), rlimit);
             try {
                 result = to_solver_ref(s)->check_sat(num_assumptions, _assumptions);
             }
@@ -355,6 +357,8 @@ extern "C" {
         init_solver(c, s);
         Z3_stats_ref * st = alloc(Z3_stats_ref);
         to_solver_ref(s)->collect_statistics(st->m_stats);
+        get_memory_statistics(st->m_stats);
+        get_rlimit_statistics(mk_c(c)->m().limit(), st->m_stats);
         mk_c(c)->save_object(st);
         Z3_stats r = of_stats(st);
         RETURN_Z3(r);

src/api/api_solver.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_SOLVER_H_
-#define _API_SOLVER_H_
+#ifndef API_SOLVER_H_
+#define API_SOLVER_H_
 
 #include"api_util.h"
 #include"solver.h"

src/api/api_stats.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_STATS_H_
-#define _API_STATS_H_
+#ifndef API_STATS_H_
+#define API_STATS_H_
 
 #include"api_util.h"
 #include"statistics.h"

src/api/api_tactic.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_TACTIC_H_
-#define _API_TACTIC_H_
+#ifndef API_TACTIC_H_
+#define API_TACTIC_H_
 
 #include"api_goal.h"
 #include"tactical.h"

src/api/api_util.h

@@ -15,8 +15,8 @@ Author:
 Revision History:
 
 --*/
-#ifndef _API_UTIL_H_
-#define _API_UTIL_H_
+#ifndef API_UTIL_H_
+#define API_UTIL_H_
 
 #include"params.h"
 #include"lbool.h"

src/api/c++/z3++.h

@@ -18,8 +18,8 @@ Author:
 Notes:
 
 --*/
-#ifndef __Z3PP_H_
-#define __Z3PP_H_
+#ifndef Z3PP_H_
+#define Z3PP_H_
 
 #include<cassert>
 #include<iostream>
@@ -203,7 +203,12 @@ namespace z3 {
            and in \c ts the predicates for testing if terms of the enumeration sort correspond to an enumeration.
         */
         sort enumeration_sort(char const * name, unsigned n, char const * const * enum_names, func_decl_vector & cs, func_decl_vector & ts);
-        
+        /**
+           \brief create an uninterpreted sort with the name given by the string or symbol.
+         */
+        sort uninterpreted_sort(char const* name);
+        sort uninterpreted_sort(symbol const& name);
+
         func_decl function(symbol const & name, unsigned arity, sort const * domain, sort const & range);
         func_decl function(char const * name, unsigned arity, sort const * domain, sort const & range);
         func_decl function(symbol const&  name, sort_vector const& domain, sort const& range);
@@ -655,6 +660,7 @@ namespace z3 {
         friend expr ite(expr const & c, expr const & t, expr const & e);
 
         friend expr distinct(expr_vector const& args);
+        friend expr concat(expr const& a, expr const& b);
 
         friend expr operator==(expr const & a, expr const & b) {
             check_context(a, b);
@@ -677,7 +683,7 @@ namespace z3 {
 
         friend expr operator+(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 Z3_ast args[2] = { a, b };
                 r = Z3_mk_add(a.ctx(), 2, args);
@@ -697,7 +703,7 @@ namespace z3 {
 
         friend expr operator*(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 Z3_ast args[2] = { a, b };
                 r = Z3_mk_mul(a.ctx(), 2, args);
@@ -724,7 +730,7 @@ namespace z3 {
 
         friend expr operator/(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 r = Z3_mk_div(a.ctx(), a, b);
             }
@@ -742,7 +748,7 @@ namespace z3 {
         friend expr operator/(int a, expr const & b) { return b.ctx().num_val(a, b.get_sort()) / b; }
 
         friend expr operator-(expr const & a) {
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith()) {
                 r = Z3_mk_unary_minus(a.ctx(), a);
             }
@@ -759,7 +765,7 @@ namespace z3 {
 
         friend expr operator-(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 Z3_ast args[2] = { a, b };
                 r = Z3_mk_sub(a.ctx(), 2, args);
@@ -779,7 +785,7 @@ namespace z3 {
 
         friend expr operator<=(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 r = Z3_mk_le(a.ctx(), a, b);
             }
@@ -798,7 +804,7 @@ namespace z3 {
 
         friend expr operator>=(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 r = Z3_mk_ge(a.ctx(), a, b);
             }
@@ -817,7 +823,7 @@ namespace z3 {
 
         friend expr operator<(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 r = Z3_mk_lt(a.ctx(), a, b);
             }
@@ -836,7 +842,7 @@ namespace z3 {
         
         friend expr operator>(expr const & a, expr const & b) {
             check_context(a, b);
-            Z3_ast r;
+            Z3_ast r = 0;
             if (a.is_arith() && b.is_arith()) {
                 r = Z3_mk_gt(a.ctx(), a, b);
             }
@@ -1108,6 +1114,13 @@ namespace z3 {
         ctx.check_error();
         return expr(ctx, r);
     }
+
+    inline expr concat(expr const& a, expr const& b) {
+        check_context(a, b);
+        Z3_ast r = Z3_mk_concat(a.ctx(), a, b);
+        a.ctx().check_error();
+        return expr(a.ctx(), r);
+    }
     
     class func_entry : public object {
         Z3_func_entry m_entry;
@@ -1176,7 +1189,7 @@ namespace z3 {
         
         expr eval(expr const & n, bool model_completion=false) const {
             check_context(*this, n);
-            Z3_ast r;
+            Z3_ast r = 0;
             Z3_bool status = Z3_model_eval(ctx(), m_model, n, model_completion, &r);
             check_error();
             if (status == Z3_FALSE)
@@ -1536,6 +1549,62 @@ namespace z3 {
         }
     };
 
+    class optimize : public object {
+        Z3_optimize m_opt;
+    public:
+        class handle {
+            unsigned m_h;
+        public:
+            handle(unsigned h): m_h(h) {}
+            unsigned h() const { return m_h; }
+        };
+        optimize(context& c):object(c) { m_opt = Z3_mk_optimize(c); Z3_optimize_inc_ref(c, m_opt); }
+        ~optimize() { Z3_optimize_dec_ref(ctx(), m_opt); }
+        operator Z3_optimize() const { return m_opt; }
+        void add(expr const& e) {
+            assert(e.is_bool());
+            Z3_optimize_assert(ctx(), m_opt, e);
+        }
+        handle add(expr const& e, unsigned weight) {
+            assert(e.is_bool());
+            std::stringstream strm;
+            strm << weight; 
+            return handle(Z3_optimize_assert_soft(ctx(), m_opt, e, strm.str().c_str(), 0)); 
+        }
+        handle add(expr const& e, char const* weight) {
+            assert(e.is_bool());
+            return handle(Z3_optimize_assert_soft(ctx(), m_opt, e, weight, 0)); 
+        }
+        handle maximize(expr const& e) {
+            return handle(Z3_optimize_maximize(ctx(), m_opt, e));
+        }
+        handle minimize(expr const& e) {
+            return handle(Z3_optimize_minimize(ctx(), m_opt, e));
+        }
+        void push() {
+            Z3_optimize_push(ctx(), m_opt);
+        }
+        void pop() {
+            Z3_optimize_pop(ctx(), m_opt);
+        }
+        check_result check() { Z3_lbool r = Z3_optimize_check(ctx(), m_opt); check_error(); return to_check_result(r); }
+        model get_model() const { Z3_model m = Z3_optimize_get_model(ctx(), m_opt); check_error(); return model(ctx(), m); }
+        void set(params const & p) { Z3_optimize_set_params(ctx(), m_opt, p); check_error(); }
+        expr lower(handle const& h) {
+            Z3_ast r = Z3_optimize_get_lower(ctx(), m_opt, h.h());
+            check_error();
+            return expr(ctx(), r);
+        }
+        expr upper(handle const& h) {
+            Z3_ast r = Z3_optimize_get_upper(ctx(), m_opt, h.h());
+            check_error();
+            return expr(ctx(), r);
+        }
+        stats statistics() const { Z3_stats r = Z3_optimize_get_statistics(ctx(), m_opt); check_error(); return stats(ctx(), r); }        
+        friend std::ostream & operator<<(std::ostream & out, optimize const & s) { out << Z3_optimize_to_string(s.ctx(), s.m_opt); return out; }
+        std::string help() const { char const * r = Z3_optimize_get_help(ctx(), m_opt); check_error();  return r; }        
+    };
+
     inline tactic fail_if(probe const & p) {
         Z3_tactic r = Z3_tactic_fail_if(p.ctx(), p);
         p.check_error();
@@ -1573,6 +1642,13 @@ namespace z3 {
         for (unsigned i = 0; i < n; i++) { cs.push_back(func_decl(*this, _cs[i])); ts.push_back(func_decl(*this, _ts[i])); }
         return s;
     }
+    inline sort context::uninterpreted_sort(char const* name) {
+        Z3_symbol _name = Z3_mk_string_symbol(*this, name);
+        return to_sort(*this, Z3_mk_uninterpreted_sort(*this, _name));
+    }
+    inline sort context::uninterpreted_sort(symbol const& name) {
+        return to_sort(*this, Z3_mk_uninterpreted_sort(*this, name));
+    }
 
     inline func_decl context::function(symbol const & name, unsigned arity, sort const * domain, sort const & range) {
         array<Z3_sort> args(arity);

src/api/dll/dll.cpp

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 #ifdef _WINDOWS
 
 #include<windows.h>

src/api/dotnet/ASTMap.cs

@@ -98,11 +98,12 @@ namespace Microsoft.Z3
         /// <summary>
         /// The keys stored in the map.
         /// </summary>
-        public ASTVector Keys
+        public AST[] Keys
         {
             get
             {
-                return new ASTVector(Context, Native.Z3_ast_map_keys(Context.nCtx, NativeObject));
+                ASTVector res = new ASTVector(Context, Native.Z3_ast_map_keys(Context.nCtx, NativeObject));
+                return res.ToArray();
             }
         }
 

src/api/dotnet/ASTVector.cs

@@ -99,6 +99,138 @@ namespace Microsoft.Z3
             return Native.Z3_ast_vector_to_string(Context.nCtx, NativeObject);
         }
 
+        /// <summary>
+        /// Translates an AST vector into an AST[]
+        /// </summary>    
+        public AST[] ToArray()
+        {
+            uint n = Size;
+            AST[] res = new AST[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = AST.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into an Expr[]
+        /// </summary>    
+        public Expr[] ToExprArray()
+        {
+            uint n = Size;
+            Expr[] res = new Expr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a BoolExpr[]
+        /// </summary>    
+        public BoolExpr[] ToBoolExprArray()
+        {
+            uint n = Size;
+            BoolExpr[] res = new BoolExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (BoolExpr) Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a BitVecExpr[]
+        /// </summary>    
+        public BitVecExpr[] ToBitVecExprArray()
+        {
+            uint n = Size;
+            BitVecExpr[] res = new BitVecExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (BitVecExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a ArithExpr[]
+        /// </summary>    
+        public ArithExpr[] ToArithExprArray()
+        {
+            uint n = Size;
+            ArithExpr[] res = new ArithExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (ArithExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a ArrayExpr[]
+        /// </summary>    
+        public ArrayExpr[] ToArrayExprArray()
+        {
+            uint n = Size;
+            ArrayExpr[] res = new ArrayExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (ArrayExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a DatatypeExpr[]
+        /// </summary>    
+        public DatatypeExpr[] ToDatatypeExprArray()
+        {
+            uint n = Size;
+            DatatypeExpr[] res = new DatatypeExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (DatatypeExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a FPExpr[]
+        /// </summary>    
+        public FPExpr[] ToFPExprArray()
+        {
+            uint n = Size;
+            FPExpr[] res = new FPExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (FPExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a FPRMExpr[]
+        /// </summary>    
+        public FPRMExpr[] ToFPRMExprArray()
+        {
+            uint n = Size;
+            FPRMExpr[] res = new FPRMExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (FPRMExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a IntExpr[]
+        /// </summary>    
+        public IntExpr[] ToIntExprArray()
+        {
+            uint n = Size;
+            IntExpr[] res = new IntExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (IntExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
+        /// <summary>
+        /// Translates an ASTVector into a RealExpr[]
+        /// </summary>    
+        public RealExpr[] ToRealExprArray()
+        {
+            uint n = Size;
+            RealExpr[] res = new RealExpr[n];
+            for (uint i = 0; i < n; i++)
+                res[i] = (RealExpr)Expr.Create(this.Context, this[i].NativeObject);
+            return res;
+        }
+
         #region Internal
         internal ASTVector(Context ctx, IntPtr obj) : base(ctx, obj) { Contract.Requires(ctx != null); }
         internal ASTVector(Context ctx) : base(ctx, Native.Z3_mk_ast_vector(ctx.nCtx)) { Contract.Requires(ctx != null); }

src/api/dotnet/Context.cs

@@ -449,6 +449,19 @@ namespace Microsoft.Z3
             return MkDatatypeSorts(MkSymbols(names), c);
         }
 
+        /// <summary>
+        /// Update a datatype field at expression t with value v.
+	/// The function performs a record update at t. The field
+	/// that is passed in as argument is updated with value v,
+	/// the remainig fields of t are unchanged.	
+        /// </summary>
+	public Expr MkUpdateField(FuncDecl field, Expr t, Expr v) 
+	{
+	    return Expr.Create(this, Native.Z3_datatype_update_field(
+	                                  nCtx, field.NativeObject,
+                                          t.NativeObject, v.NativeObject));		
+	}
+
         #endregion
         #endregion
 
@@ -2121,31 +2134,31 @@ namespace Microsoft.Z3
         /// <summary>
         /// Create an empty set.
         /// </summary>
-        public Expr MkEmptySet(Sort domain)
+        public ArrayExpr MkEmptySet(Sort domain)
         {
             Contract.Requires(domain != null);
             Contract.Ensures(Contract.Result<Expr>() != null);
 
             CheckContextMatch(domain);
-            return Expr.Create(this, Native.Z3_mk_empty_set(nCtx, domain.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_empty_set(nCtx, domain.NativeObject));
         }
 
         /// <summary>
         /// Create the full set.
         /// </summary>
-        public Expr MkFullSet(Sort domain)
+        public ArrayExpr MkFullSet(Sort domain)
         {
             Contract.Requires(domain != null);
             Contract.Ensures(Contract.Result<Expr>() != null);
 
             CheckContextMatch(domain);
-            return Expr.Create(this, Native.Z3_mk_full_set(nCtx, domain.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_full_set(nCtx, domain.NativeObject));
         }
 
         /// <summary>
         /// Add an element to the set.
         /// </summary>
-        public Expr MkSetAdd(Expr set, Expr element)
+        public ArrayExpr MkSetAdd(ArrayExpr set, Expr element)
         {
             Contract.Requires(set != null);
             Contract.Requires(element != null);
@@ -2153,14 +2166,14 @@ namespace Microsoft.Z3
 
             CheckContextMatch(set);
             CheckContextMatch(element);
-            return Expr.Create(this, Native.Z3_mk_set_add(nCtx, set.NativeObject, element.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_add(nCtx, set.NativeObject, element.NativeObject));
         }
 
 
         /// <summary>
         /// Remove an element from a set.
         /// </summary>
-        public Expr MkSetDel(Expr set, Expr element)
+        public ArrayExpr MkSetDel(ArrayExpr set, Expr element)
         {
             Contract.Requires(set != null);
             Contract.Requires(element != null);
@@ -2168,38 +2181,38 @@ namespace Microsoft.Z3
 
             CheckContextMatch(set);
             CheckContextMatch(element);
-            return Expr.Create(this, Native.Z3_mk_set_del(nCtx, set.NativeObject, element.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_del(nCtx, set.NativeObject, element.NativeObject));
         }
 
         /// <summary>
         /// Take the union of a list of sets.
         /// </summary>
-        public Expr MkSetUnion(params Expr[] args)
+        public ArrayExpr MkSetUnion(params ArrayExpr[] args)
         {
             Contract.Requires(args != null);
             Contract.Requires(Contract.ForAll(args, a => a != null));
 
             CheckContextMatch(args);
-            return Expr.Create(this, Native.Z3_mk_set_union(nCtx, (uint)args.Length, AST.ArrayToNative(args)));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_union(nCtx, (uint)args.Length, AST.ArrayToNative(args)));
         }
 
         /// <summary>
         /// Take the intersection of a list of sets.
         /// </summary>
-        public Expr MkSetIntersection(params Expr[] args)
+        public ArrayExpr MkSetIntersection(params ArrayExpr[] args)
         {
             Contract.Requires(args != null);
             Contract.Requires(Contract.ForAll(args, a => a != null));
             Contract.Ensures(Contract.Result<Expr>() != null);
 
             CheckContextMatch(args);
-            return Expr.Create(this, Native.Z3_mk_set_intersect(nCtx, (uint)args.Length, AST.ArrayToNative(args)));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_intersect(nCtx, (uint)args.Length, AST.ArrayToNative(args)));
         }
 
         /// <summary>
         /// Take the difference between two sets.
         /// </summary>
-        public Expr MkSetDifference(Expr arg1, Expr arg2)
+        public ArrayExpr MkSetDifference(ArrayExpr arg1, ArrayExpr arg2)
         {
             Contract.Requires(arg1 != null);
             Contract.Requires(arg2 != null);
@@ -2207,25 +2220,25 @@ namespace Microsoft.Z3
 
             CheckContextMatch(arg1);
             CheckContextMatch(arg2);
-            return Expr.Create(this, Native.Z3_mk_set_difference(nCtx, arg1.NativeObject, arg2.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_difference(nCtx, arg1.NativeObject, arg2.NativeObject));
         }
 
         /// <summary>
         /// Take the complement of a set.
         /// </summary>
-        public Expr MkSetComplement(Expr arg)
+        public ArrayExpr MkSetComplement(ArrayExpr arg)
         {
             Contract.Requires(arg != null);
             Contract.Ensures(Contract.Result<Expr>() != null);
 
             CheckContextMatch(arg);
-            return Expr.Create(this, Native.Z3_mk_set_complement(nCtx, arg.NativeObject));
+            return (ArrayExpr)Expr.Create(this, Native.Z3_mk_set_complement(nCtx, arg.NativeObject));
         }
 
         /// <summary>
         /// Check for set membership.
         /// </summary>
-        public Expr MkSetMembership(Expr elem, Expr set)
+        public BoolExpr MkSetMembership(Expr elem, ArrayExpr set)
         {
             Contract.Requires(elem != null);
             Contract.Requires(set != null);
@@ -2233,13 +2246,13 @@ namespace Microsoft.Z3
 
             CheckContextMatch(elem);
             CheckContextMatch(set);
-            return Expr.Create(this, Native.Z3_mk_set_member(nCtx, elem.NativeObject, set.NativeObject));
+            return (BoolExpr) Expr.Create(this, Native.Z3_mk_set_member(nCtx, elem.NativeObject, set.NativeObject));
         }
 
         /// <summary>
         /// Check for subsetness of sets.
         /// </summary>
-        public Expr MkSetSubset(Expr arg1, Expr arg2)
+        public BoolExpr MkSetSubset(ArrayExpr arg1, ArrayExpr arg2)
         {
             Contract.Requires(arg1 != null);
             Contract.Requires(arg2 != null);
@@ -2247,7 +2260,37 @@ namespace Microsoft.Z3
 
             CheckContextMatch(arg1);
             CheckContextMatch(arg2);
-            return Expr.Create(this, Native.Z3_mk_set_subset(nCtx, arg1.NativeObject, arg2.NativeObject));
+            return (BoolExpr) Expr.Create(this, Native.Z3_mk_set_subset(nCtx, arg1.NativeObject, arg2.NativeObject));
+        }
+        #endregion
+
+        #region Pseudo-Boolean constraints
+
+        /// <summary>
+        /// Create an at-most-k constraint.
+        /// </summary>
+        public BoolExpr MkAtMost(BoolExpr[] args, uint k) 
+        {
+           Contract.Requires(args != null);
+           Contract.Requires(Contract.Result<BoolExpr[]>() != null);
+           CheckContextMatch(args);
+           return new BoolExpr(this, Native.Z3_mk_atmost(nCtx, (uint) args.Length, 
+                                                          AST.ArrayToNative(args), k));
+        }
+
+        /// <summary>
+        /// Create a pseudo-Boolean less-or-equal constraint.
+        /// </summary>
+        public BoolExpr MkPBLe(int[] coeffs, BoolExpr[] args, int k) 
+        {
+           Contract.Requires(args != null);
+           Contract.Requires(coeffs != null);
+           Contract.Requires(args.Length == coeffs.Length);
+           Contract.Requires(Contract.Result<BoolExpr[]>() != null);
+           CheckContextMatch(args);
+           return new BoolExpr(this, Native.Z3_mk_pble(nCtx, (uint) args.Length, 
+                                                          AST.ArrayToNative(args), 
+                                                          coeffs, k));
         }
         #endregion
 
@@ -3438,6 +3481,18 @@ namespace Microsoft.Z3
         }
         #endregion
 
+        #region Optimization
+        /// <summary>
+        /// Create an Optimization context.
+        /// </summary>
+        public Optimize MkOptimize()
+        {
+            Contract.Ensures(Contract.Result<Optimize>() != null);
+
+            return new Optimize(this);
+        }
+        #endregion
+
         #region Floating-Point Arithmetic
 
         #region Rounding Modes
@@ -4383,6 +4438,7 @@ namespace Microsoft.Z3
             Contract.Invariant(m_Statistics_DRQ != null);
             Contract.Invariant(m_Tactic_DRQ != null);
             Contract.Invariant(m_Fixedpoint_DRQ != null);
+            Contract.Invariant(m_Optimize_DRQ != null);
         }
 
         readonly private AST.DecRefQueue m_AST_DRQ = new AST.DecRefQueue();
@@ -4400,6 +4456,7 @@ namespace Microsoft.Z3
         readonly private Statistics.DecRefQueue m_Statistics_DRQ = new Statistics.DecRefQueue(10);
         readonly private Tactic.DecRefQueue m_Tactic_DRQ = new Tactic.DecRefQueue(10);
         readonly private Fixedpoint.DecRefQueue m_Fixedpoint_DRQ = new Fixedpoint.DecRefQueue(10);
+	readonly private Optimize.DecRefQueue m_Optimize_DRQ = new Optimize.DecRefQueue(10);
 
         /// <summary>
         /// AST DRQ
@@ -4476,6 +4533,11 @@ namespace Microsoft.Z3
         /// </summary>
         public IDecRefQueue Fixedpoint_DRQ { get { Contract.Ensures(Contract.Result<Fixedpoint.DecRefQueue>() != null); return m_Fixedpoint_DRQ; } }
 
+        /// <summary>
+        /// Optimize DRQ
+        /// </summary>
+        public IDecRefQueue Optimize_DRQ { get { Contract.Ensures(Contract.Result<Optimize.DecRefQueue>() != null); return m_Fixedpoint_DRQ; } }
+
 
         internal long refCount = 0;
 
@@ -4518,6 +4580,7 @@ namespace Microsoft.Z3
             Statistics_DRQ.Clear(this);
             Tactic_DRQ.Clear(this);
             Fixedpoint_DRQ.Clear(this);
+            Optimize_DRQ.Clear(this);
 
             m_boolSort = null;
             m_intSort = null;

src/api/dotnet/Deprecated.cs

@@ -0,0 +1,111 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    Deprecated.cs
+
+Abstract:
+
+    Expose deprecated features for use from the managed API 
+    those who use them for experiments.
+
+Author:
+
+    Christoph Wintersteiger (cwinter) 2012-03-15
+
+Notes:
+    
+--*/
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Diagnostics.Contracts;
+
+namespace Microsoft.Z3
+{
+    /// <summary>
+    /// The main interaction with Z3 happens via the Context.
+    /// </summary>
+    [ContractVerification(true)]
+    public class Deprecated 
+    {
+
+        /// <summary>
+        /// Creates a backtracking point.
+        /// </summary>
+        /// <seealso cref="Pop"/>
+         public static void Push(Context ctx) {
+             Native.Z3_push(ctx.nCtx);
+         }
+
+        /// <summary>
+        /// Backtracks <paramref name="n"/> backtracking points.
+        /// </summary>
+        /// <remarks>Note that an exception is thrown if <paramref name="n"/> is not smaller than <c>NumScopes</c></remarks>
+        /// <seealso cref="Push"/>
+         public static void Pop(Context ctx, uint n = 1) {
+             Native.Z3_pop(ctx.nCtx, n);
+         }
+
+        /// <summary>
+        /// Assert a constraint (or multiple) into the solver.
+        /// </summary>        
+         public static void Assert(Context ctx, params BoolExpr[] constraints) 
+         {
+            Contract.Requires(constraints != null);
+            Contract.Requires(Contract.ForAll(constraints, c => c != null));
+
+            ctx.CheckContextMatch(constraints);
+            foreach (BoolExpr a in constraints)
+            {
+                Native.Z3_assert_cnstr(ctx.nCtx, a.NativeObject);
+            }
+         }
+        /// <summary>
+        /// Checks whether the assertions in the context are consistent or not.
+        /// </summary>
+        public static Status Check(Context ctx, List<BoolExpr> core, ref Model model, ref Expr proof, params Expr[] assumptions)
+        {
+            Z3_lbool r;
+            model = null;
+            proof = null;
+            if (assumptions == null || assumptions.Length == 0)
+                r = (Z3_lbool)Native.Z3_check(ctx.nCtx);
+            else {
+                IntPtr mdl = IntPtr.Zero, prf = IntPtr.Zero;
+                uint core_size = 0;
+                IntPtr[] native_core = new IntPtr[assumptions.Length];
+                r = (Z3_lbool)Native.Z3_check_assumptions(ctx.nCtx, 
+                                   (uint)assumptions.Length, AST.ArrayToNative(assumptions),
+                                   ref mdl, ref prf, ref core_size, native_core);
+
+                for (uint i = 0; i < core_size; i++)
+                    core.Add((BoolExpr)Expr.Create(ctx, native_core[i]));
+                if (mdl != IntPtr.Zero) {
+                    model = new Model(ctx, mdl);
+                }
+                if (prf != IntPtr.Zero) {
+                    proof = Expr.Create(ctx, prf);
+                }
+
+            }
+            switch (r)
+            {
+                case Z3_lbool.Z3_L_TRUE: return Status.SATISFIABLE;
+                case Z3_lbool.Z3_L_FALSE: return Status.UNSATISFIABLE;
+                default: return Status.UNKNOWN;
+            }
+        }
+
+        /// <summary>
+        /// Retrieves an assignment to atomic propositions for a satisfiable context.
+        /// </summary>
+         public static BoolExpr GetAssignment(Context ctx) 
+         {
+             IntPtr x = Native.Z3_get_context_assignment(ctx.nCtx);
+             return (BoolExpr)Expr.Create(ctx, x);
+         }
+
+    }
+}

src/api/dotnet/FPNum.cs

@@ -59,6 +59,25 @@ namespace Microsoft.Z3
             }
         }
 
+        /// <summary>
+        /// The significand value of a floating-point numeral as a UInt64
+        /// </summary>
+        /// <remarks>
+        /// This function extracts the significand bits, without the 
+        /// hidden bit or normalization. Throws an exception if the
+        /// significand does not fit into a UInt64.
+        /// </remarks>
+        public UInt64 SignificandUInt64
+        {
+            get
+            {
+                UInt64 result = 0;
+                if (Native.Z3_fpa_get_numeral_significand_uint64(Context.nCtx, NativeObject, ref result) == 0)
+                    throw new Z3Exception("Significand is not a 64 bit unsigned integer");                
+                return result;
+            }
+        }
+
         /// <summary>
         /// Return the exponent value of a floating-point numeral as a string
         /// </summary>

src/api/dotnet/Fixedpoint.cs

@@ -269,14 +269,6 @@ namespace Microsoft.Z3
                              AST.ArrayLength(queries), AST.ArrayToNative(queries));
         }
 
-        BoolExpr[] ToBoolExprs(ASTVector v) {
-            uint n = v.Size;
-            BoolExpr[] res = new BoolExpr[n];
-            for (uint i = 0; i < n; i++)
-                res[i] = new BoolExpr(Context, v[i].NativeObject);
-            return res;
-        }
-
         /// <summary>
         /// Retrieve set of rules added to fixedpoint context.
         /// </summary>                
@@ -286,7 +278,8 @@ namespace Microsoft.Z3
             {
                 Contract.Ensures(Contract.Result<BoolExpr[]>() != null);
 
-                return ToBoolExprs(new ASTVector(Context, Native.Z3_fixedpoint_get_rules(Context.nCtx, NativeObject)));
+                ASTVector av = new ASTVector(Context, Native.Z3_fixedpoint_get_rules(Context.nCtx, NativeObject));
+                return av.ToBoolExprArray();
             }
         }
 
@@ -299,7 +292,21 @@ namespace Microsoft.Z3
             {
                 Contract.Ensures(Contract.Result<BoolExpr[]>() != null);
 
-                return ToBoolExprs(new ASTVector(Context, Native.Z3_fixedpoint_get_assertions(Context.nCtx, NativeObject)));
+                ASTVector av = new ASTVector(Context, Native.Z3_fixedpoint_get_assertions(Context.nCtx, NativeObject));
+                return av.ToBoolExprArray();
+            }
+        }
+
+        /// <summary>
+        /// Fixedpoint statistics.
+        /// </summary>
+        public Statistics Statistics
+        {
+            get
+            {
+                Contract.Ensures(Contract.Result<Statistics>() != null);
+
+                return new Statistics(Context, Native.Z3_fixedpoint_get_statistics(Context.nCtx, NativeObject));
             }
         }
 
@@ -308,16 +315,19 @@ namespace Microsoft.Z3
         /// Add the rules to the current fixedpoint context. 
         /// Return the set of queries in the file.
         /// </summary>                
-	public BoolExpr[] ParseFile(string file) {
-            return ToBoolExprs(new ASTVector(Context, Native.Z3_fixedpoint_from_file(Context.nCtx, NativeObject, file)));
+        public BoolExpr[] ParseFile(string file)
+        {
+            ASTVector av = new ASTVector(Context, Native.Z3_fixedpoint_from_file(Context.nCtx, NativeObject, file));
+            return av.ToBoolExprArray();
         }
 
         /// <summary>
         /// Similar to ParseFile. Instead it takes as argument a string.
-        /// </summary>                
-
-	public BoolExpr[] ParseString(string s) {
-            return ToBoolExprs(new ASTVector(Context, Native.Z3_fixedpoint_from_string(Context.nCtx, NativeObject, s)));
+        /// </summary>
+        public BoolExpr[] ParseString(string s)
+        {
+            ASTVector av = new ASTVector(Context, Native.Z3_fixedpoint_from_string(Context.nCtx, NativeObject, s));
+            return av.ToBoolExprArray();
         }
 
 

src/api/dotnet/Goal.cs

@@ -208,6 +208,21 @@ namespace Microsoft.Z3
             return Native.Z3_goal_to_string(Context.nCtx, NativeObject);
         }
 
+        /// <summary>
+        /// Goal to BoolExpr conversion.
+        /// </summary>
+        /// <returns>A string representation of the Goal.</returns>
+        public BoolExpr AsBoolExpr() {
+            uint n = Size;
+            if (n == 0) 
+                return Context.MkTrue();
+            else if (n == 1)                
+                return Formulas[0];
+            else {
+                return Context.MkAnd(Formulas);
+            }
+        }
+
         #region Internal
         internal Goal(Context ctx, IntPtr obj) : base(ctx, obj) { Contract.Requires(ctx != null); }
 

src/api/dotnet/InterpolationContext.cs

@@ -1,3 +1,9 @@
+
+/*++
+Copyright (c) 2015 Microsoft Corporation
+
+--*/
+
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -47,7 +53,7 @@ namespace Microsoft.Z3
         /// <remarks>For more information on interpolation please refer
         /// too the function Z3_get_interpolant in the C/C++ API, which is 
         /// well documented.</remarks>
-        public Expr[] GetInterpolant(Expr pf, Expr pat, Params p)
+        public BoolExpr[] GetInterpolant(Expr pf, Expr pat, Params p)
         {
             Contract.Requires(pf != null);
             Contract.Requires(pat != null);
@@ -59,11 +65,7 @@ namespace Microsoft.Z3
             CheckContextMatch(p);
 
             ASTVector seq = new ASTVector(this, Native.Z3_get_interpolant(nCtx, pf.NativeObject, pat.NativeObject, p.NativeObject));
-            uint n = seq.Size;
-            Expr[] res = new Expr[n];
-            for (uint i = 0; i < n; i++)
-                res[i] = Expr.Create(this, seq[i].NativeObject);
-            return res;
+            return seq.ToBoolExprArray();
         }
 
         /// <summary> 
@@ -72,7 +74,7 @@ namespace Microsoft.Z3
         /// <remarks>For more information on interpolation please refer
         /// too the function Z3_compute_interpolant in the C/C++ API, which is 
         /// well documented.</remarks>
-        public Z3_lbool ComputeInterpolant(Expr pat, Params p, out ASTVector interp, out Model model)
+        public Z3_lbool ComputeInterpolant(Expr pat, Params p, out BoolExpr[] interp, out Model model)
         {
             Contract.Requires(pat != null);
             Contract.Requires(p != null);
@@ -84,7 +86,7 @@ namespace Microsoft.Z3
 
             IntPtr i = IntPtr.Zero, m = IntPtr.Zero;
             int r = Native.Z3_compute_interpolant(nCtx, pat.NativeObject, p.NativeObject, ref i, ref m);
-            interp = new ASTVector(this, i);
+            interp = new ASTVector(this, i).ToBoolExprArray();
             model = new Model(this, m);
             return (Z3_lbool)r;
         }
@@ -106,7 +108,7 @@ namespace Microsoft.Z3
         /// <remarks>For more information on interpolation please refer
         /// too the function Z3_check_interpolant in the C/C++ API, which is 
         /// well documented.</remarks>
-        public int CheckInterpolant(Expr[] cnsts, uint[] parents, Expr[] interps, out string error, Expr[] theory)
+        public int CheckInterpolant(Expr[] cnsts, uint[] parents, BoolExpr[] interps, out string error, Expr[] theory)
         {
             Contract.Requires(cnsts.Length == parents.Length);
             Contract.Requires(cnsts.Length == interps.Length + 1);

src/api/dotnet/Microsoft.Z3.csproj

@@ -365,6 +365,7 @@
     <Compile Include="IntSymbol.cs" />
     <Compile Include="ListSort.cs" />
     <Compile Include="Model.cs" />
+    <Compile Include="Optimize.cs" />
     <Compile Include="Params.cs" />
     <Compile Include="ParamDescrs.cs" />
     <Compile Include="Pattern.cs" />

src/api/dotnet/Model.cs

@@ -265,12 +265,8 @@ namespace Microsoft.Z3
             Contract.Requires(s != null);
             Contract.Ensures(Contract.Result<Expr[]>() != null);
 
-            ASTVector nUniv = new ASTVector(Context, Native.Z3_model_get_sort_universe(Context.nCtx, NativeObject, s.NativeObject));
-            uint n = nUniv.Size;
-            Expr[] res = new Expr[n];
-            for (uint i = 0; i < n; i++)
-                res[i] = Expr.Create(Context, nUniv[i].NativeObject);
-            return res;
+            ASTVector av = new ASTVector(Context, Native.Z3_model_get_sort_universe(Context.nCtx, NativeObject, s.NativeObject));            
+            return av.ToExprArray();
         }
 
         /// <summary>

src/api/dotnet/Optimize.cs

@@ -0,0 +1,307 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    Optimize.cs
+
+Abstract:
+
+    Z3 Managed API: Optimizes
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2013-12-03
+
+Notes:
+    
+--*/
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.Contracts;
+
+namespace Microsoft.Z3
+{
+    /// <summary>
+    /// Object for managing optimizization context
+    /// </summary>
+    [ContractVerification(true)]
+    public class Optimize : Z3Object
+    {
+        /// <summary>
+        /// A string that describes all available optimize solver parameters.
+        /// </summary>
+        public string Help
+        {
+            get
+            {
+                Contract.Ensures(Contract.Result<string>() != null);
+                return Native.Z3_optimize_get_help(Context.nCtx, NativeObject);
+            }
+        }
+
+        /// <summary>
+        /// Sets the optimize solver parameters.
+        /// </summary>
+        public Params Parameters
+        {
+            set
+            {
+                Contract.Requires(value != null);
+                Context.CheckContextMatch(value);
+                Native.Z3_optimize_set_params(Context.nCtx, NativeObject, value.NativeObject);
+            }
+        }
+
+        /// <summary>
+        /// Retrieves parameter descriptions for Optimize solver.
+        /// </summary>
+        public ParamDescrs ParameterDescriptions
+        {
+            get { return new ParamDescrs(Context, Native.Z3_optimize_get_param_descrs(Context.nCtx, NativeObject)); }
+        }
+
+        /// <summary>
+        /// Assert a constraint (or multiple) into the optimize solver.
+        /// </summary>        
+        public void Assert(params BoolExpr[] constraints)
+        {
+            Contract.Requires(constraints != null);
+            Contract.Requires(Contract.ForAll(constraints, c => c != null));
+
+            Context.CheckContextMatch(constraints);
+            foreach (BoolExpr a in constraints)
+            {
+                Native.Z3_optimize_assert(Context.nCtx, NativeObject, a.NativeObject);
+            }
+        }
+
+        /// <summary>
+        /// Alias for Assert.
+        /// </summary>        
+        public void Add(params BoolExpr[] constraints)
+        {
+            Assert(constraints);
+        }
+
+        /// <summary>
+        /// Handle to objectives returned by objective functions.
+        /// </summary>
+        public class Handle
+        {
+            Optimize opt;
+            uint handle;
+            internal Handle(Optimize opt, uint h)
+            {
+                this.opt = opt;
+                this.handle = h;
+            }
+
+            /// <summary>
+            /// Retrieve a lower bound for the objective handle.
+            /// </summary>        	   	
+            public ArithExpr Lower
+            {
+                get { return opt.GetLower(handle); }
+            }
+
+            /// <summary>
+            /// Retrieve an upper bound for the objective handle.
+            /// </summary>        	   	
+            public ArithExpr Upper
+            {
+                get { return opt.GetUpper(handle); }
+            }
+
+            /// <summary>
+            /// Retrieve the value of an objective.
+            /// </summary>        	   	
+            public ArithExpr Value
+            {
+                get { return Lower; }
+            }
+        }
+
+        /// <summary>
+        /// Assert soft constraint
+        /// </summary>        
+        /// <remarks>
+        /// Return an objective which associates with the group of constraints.
+        /// </remarks>
+        public Handle AssertSoft(BoolExpr constraint, uint weight, string group)
+        {
+            Context.CheckContextMatch(constraint);
+            Symbol s = Context.MkSymbol(group);
+            return new Handle(this, Native.Z3_optimize_assert_soft(Context.nCtx, NativeObject, constraint.NativeObject, weight.ToString(), s.NativeObject));
+        }
+
+
+        /// <summary>
+        /// Check satisfiability of asserted constraints.
+        /// Produce a model that (when the objectives are bounded and 
+        /// don't use strict inequalities) meets the objectives.
+        /// </summary>
+        ///
+        public Status Check()
+        {
+            Z3_lbool r = (Z3_lbool)Native.Z3_optimize_check(Context.nCtx, NativeObject);
+            switch (r)
+            {
+                case Z3_lbool.Z3_L_TRUE:
+                    return Status.SATISFIABLE;
+                case Z3_lbool.Z3_L_FALSE:
+                    return Status.UNSATISFIABLE;
+                default:
+                    return Status.UNKNOWN;
+            }
+        }
+
+        /// <summary>
+        /// Creates a backtracking point.
+        /// </summary>
+        /// <seealso cref="Pop"/>
+        public void Push()
+        {
+            Native.Z3_optimize_push(Context.nCtx, NativeObject);
+        }
+
+        /// <summary>
+        /// Backtrack one backtracking point.
+        /// </summary>
+        /// <remarks>Note that an exception is thrown if Pop is called without a corresponding <c>Push</c></remarks>
+        /// <seealso cref="Push"/>
+        public void Pop()
+        {
+            Native.Z3_optimize_pop(Context.nCtx, NativeObject);
+        }
+
+
+        /// <summary>
+        /// The model of the last <c>Check</c>.
+        /// </summary>
+        /// <remarks>
+        /// The result is <c>null</c> if <c>Check</c> was not invoked before,
+        /// if its results was not <c>SATISFIABLE</c>, or if model production is not enabled.
+        /// </remarks>
+        public Model Model
+        {
+            get
+            {
+                IntPtr x = Native.Z3_optimize_get_model(Context.nCtx, NativeObject);
+                if (x == IntPtr.Zero)
+                    return null;
+                else
+                    return new Model(Context, x);
+            }
+        }
+
+        /// <summary>
+        /// Declare an arithmetical maximization objective.
+        /// Return a handle to the objective. The handle is used as
+        /// to retrieve the values of objectives after calling Check.
+        /// </summary>        	
+        public Handle MkMaximize(ArithExpr e)
+        {
+            return new Handle(this, Native.Z3_optimize_maximize(Context.nCtx, NativeObject, e.NativeObject));
+        }
+
+        /// <summary>
+        /// Declare an arithmetical minimization objective. 
+        /// Similar to MkMaximize.
+        /// </summary>        	
+        public Handle MkMinimize(ArithExpr e)
+        {
+            return new Handle(this, Native.Z3_optimize_minimize(Context.nCtx, NativeObject, e.NativeObject));
+        }
+
+        /// <summary>
+        /// Retrieve a lower bound for the objective handle.
+        /// </summary>        	
+        private ArithExpr GetLower(uint index)
+        {
+            return (ArithExpr)Expr.Create(Context, Native.Z3_optimize_get_lower(Context.nCtx, NativeObject, index));
+        }
+
+
+        /// <summary>
+        /// Retrieve an upper bound for the objective handle.
+        /// </summary>        	
+        private ArithExpr GetUpper(uint index)
+        {
+            return (ArithExpr)Expr.Create(Context, Native.Z3_optimize_get_upper(Context.nCtx, NativeObject, index));
+        }
+
+	/// <summary>
+	/// Return a string the describes why the last to check returned unknown
+	/// </summary>	
+    	public String getReasonUnknown()
+    	{
+            Contract.Ensures(Contract.Result<string>() != null);
+            return Native.Z3_optimize_get_reason_unknown(Context.nCtx, NativeObject);
+    	}
+
+
+        /// <summary>
+        /// Print the context to a string (SMT-LIB parseable benchmark).
+        /// </summary>        	
+        public override string ToString()
+        {
+            return Native.Z3_optimize_to_string(Context.nCtx, NativeObject);
+        }
+
+        /// <summary>
+        /// Optimize statistics.
+        /// </summary>
+        public Statistics Statistics
+        {
+            get
+            {
+                Contract.Ensures(Contract.Result<Statistics>() != null);
+
+                return new Statistics(Context, Native.Z3_optimize_get_statistics(Context.nCtx, NativeObject));
+            }
+        }
+
+
+        #region Internal
+        internal Optimize(Context ctx, IntPtr obj)
+            : base(ctx, obj)
+        {
+            Contract.Requires(ctx != null);
+        }
+        internal Optimize(Context ctx)
+            : base(ctx, Native.Z3_mk_optimize(ctx.nCtx))
+        {
+            Contract.Requires(ctx != null);
+        }
+
+        internal class DecRefQueue : IDecRefQueue
+        {
+            public DecRefQueue() : base() { }
+            public DecRefQueue(uint move_limit) : base(move_limit) { }
+            internal override void IncRef(Context ctx, IntPtr obj)
+            {
+                Native.Z3_optimize_inc_ref(ctx.nCtx, obj);
+            }
+
+            internal override void DecRef(Context ctx, IntPtr obj)
+            {
+                Native.Z3_optimize_dec_ref(ctx.nCtx, obj);
+            }
+        };
+
+        internal override void IncRef(IntPtr o)
+        {
+            Context.Optimize_DRQ.IncAndClear(Context, o);
+            base.IncRef(o);
+        }
+
+        internal override void DecRef(IntPtr o)
+        {
+            Context.Optimize_DRQ.Add(o);
+            base.DecRef(o);
+        }
+        #endregion
+    }
+}

src/api/dotnet/Params.cs

@@ -79,6 +79,7 @@ namespace Microsoft.Z3
             Native.Z3_params_set_symbol(Context.nCtx, NativeObject, name.NativeObject, value.NativeObject);
         }
 
+
         /// <summary>
         /// Adds a parameter setting.
         /// </summary>
@@ -118,6 +119,7 @@ namespace Microsoft.Z3
         /// </summary>
         public void Add(string name, string value)
         {
+            Contract.Requires(name != null);
             Contract.Requires(value != null);
 
             Native.Z3_params_set_symbol(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, Context.MkSymbol(value).NativeObject);

src/api/dotnet/Solver.cs

@@ -178,8 +178,8 @@ namespace Microsoft.Z3
         {
             get
             {
-                ASTVector ass = new ASTVector(Context, Native.Z3_solver_get_assertions(Context.nCtx, NativeObject));
-                return ass.Size;
+                ASTVector assertions = new ASTVector(Context, Native.Z3_solver_get_assertions(Context.nCtx, NativeObject));
+                return assertions.Size;
             }
         }
 
@@ -192,12 +192,8 @@ namespace Microsoft.Z3
             {
                 Contract.Ensures(Contract.Result<BoolExpr[]>() != null);
 
-                ASTVector ass = new ASTVector(Context, Native.Z3_solver_get_assertions(Context.nCtx, NativeObject));
-                uint n = ass.Size;
-                BoolExpr[] res = new BoolExpr[n];
-                for (uint i = 0; i < n; i++)
-                    res[i] = new BoolExpr(Context, ass[i].NativeObject);
-                return res;
+                ASTVector assertions = new ASTVector(Context, Native.Z3_solver_get_assertions(Context.nCtx, NativeObject));
+                return assertions.ToBoolExprArray();
             }
         }
 
@@ -270,18 +266,14 @@ namespace Microsoft.Z3
         /// The result is empty if <c>Check</c> was not invoked before,
         /// if its results was not <c>UNSATISFIABLE</c>, or if core production is disabled.
         /// </remarks>
-        public Expr[] UnsatCore
+        public BoolExpr[] UnsatCore
         {
             get
             {
                 Contract.Ensures(Contract.Result<Expr[]>() != null);
 
-                ASTVector core = new ASTVector(Context, Native.Z3_solver_get_unsat_core(Context.nCtx, NativeObject));
-                uint n = core.Size;
-                Expr[] res = new Expr[n];
-                for (uint i = 0; i < n; i++)
-                    res[i] = Expr.Create(Context, core[i].NativeObject);
-                return res;
+                ASTVector core = new ASTVector(Context, Native.Z3_solver_get_unsat_core(Context.nCtx, NativeObject));                
+                return core.ToBoolExprArray();
             }
         }
 

src/api/dotnet/Symbol.cs

@@ -66,6 +66,47 @@ namespace Microsoft.Z3
                 throw new Z3Exception("Unknown symbol kind encountered");
         }
 
+
+        /// <summary>
+        /// Equality overloading.
+        /// </summary>
+        public static bool operator ==(Symbol s1, Symbol s2)
+        {
+            
+            return Object.ReferenceEquals(s1, s2) ||
+                   (!Object.ReferenceEquals(s1, null) &&
+                    !Object.ReferenceEquals(s2, null) &&
+                    s1.NativeObject == s2.NativeObject);
+        }
+
+        /// <summary>
+        /// Equality overloading.
+        /// </summary>
+        public static bool operator !=(Symbol s1, Symbol s2)
+        {
+            return !(s1.NativeObject == s2.NativeObject);
+        }
+
+        /// <summary>
+        /// Object comparison.
+        /// </summary>
+        public override bool Equals(object o)
+        {
+            Symbol casted = o as Symbol;
+            if (casted == null) return false;
+            return this == casted;
+        }
+
+        /// <summary>
+        /// The Symbols's hash code.
+        /// </summary>
+        /// <returns>A hash code</returns>
+        public override int GetHashCode()
+        {
+            return (int)NativeObject;
+        }
+
+
         #region Internal
         /// <summary>
         /// Symbol constructor

src/api/java/AST.java

@@ -22,10 +22,8 @@ import com.microsoft.z3.enumerations.Z3_ast_kind;
 /**
  * The abstract syntax tree (AST) class.
  **/
-public class AST extends Z3Object
+public class AST extends Z3Object implements Comparable
 {
-    /* Overloaded operators are not translated. */
-
     /**
      * Object comparison.
      * 
@@ -35,7 +33,7 @@ public class AST extends Z3Object
     {
         AST casted = null;
 
-        try
+	try
         {
             casted = AST.class.cast(o);
         } catch (ClassCastException e)
@@ -43,8 +41,13 @@ public class AST extends Z3Object
             return false;
         }
 
-        return this.getNativeObject() == casted.getNativeObject();
-    }
+	return  
+	    (this == casted) || 
+	    (this != null) &&
+	    (casted != null) &&
+	    (getContext().nCtx() == casted.getContext().nCtx()) &&
+	    (Native.isEqAst(getContext().nCtx(), getNativeObject(), casted.getNativeObject()));
+}
 
     /**
      * Object Comparison. 

src/api/java/ASTMap.java

@@ -92,10 +92,10 @@ class ASTMap extends Z3Object
      * 
      * @throws Z3Exception
      **/
-    public ASTVector getKeys()
+    public AST[] getKeys()
     {
-        return new ASTVector(getContext(), Native.astMapKeys(getContext().nCtx(),
-                getNativeObject()));
+        ASTVector av = new ASTVector(getContext(), Native.astMapKeys(getContext().nCtx(), getNativeObject()));
+        return av.ToArray();
     }
 
     /**

src/api/java/ASTVector.java

@@ -119,4 +119,135 @@ public class ASTVector extends Z3Object
         getContext().getASTVectorDRQ().add(o);
         super.decRef(o);
     }
-}
+    
+    /**
+     * Translates the AST vector into an AST[]
+     * */
+    public AST[] ToArray()
+    {
+        int n = size();
+        AST[] res = new AST[n];
+        for (int i = 0; i < n; i++)
+            res[i] = AST.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+    
+    /**
+     * Translates the AST vector into an Expr[]
+     * */
+    public Expr[] ToExprArray() {
+        int n = size();
+        Expr[] res = new Expr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = Expr.create(getContext(), get(i).getNativeObject());
+        return res;	
+    }
+
+    /**
+     * Translates the AST vector into an BoolExpr[]
+     * */  
+    public BoolExpr[] ToBoolExprArray()
+    {
+        int n = size();
+        BoolExpr[] res = new BoolExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (BoolExpr) Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an BitVecExpr[]
+     * */    
+    public BitVecExpr[] ToBitVecExprArray()
+    {
+        int n = size();
+        BitVecExpr[] res = new BitVecExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (BitVecExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an ArithExpr[]
+     * */   
+    public ArithExpr[] ToArithExprExprArray()
+    {
+        int n = size();
+        ArithExpr[] res = new ArithExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (ArithExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an ArrayExpr[]
+     * */  
+    public ArrayExpr[] ToArrayExprArray()
+    {
+        int n = size();
+        ArrayExpr[] res = new ArrayExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (ArrayExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an DatatypeExpr[]
+     * */ 
+    public DatatypeExpr[] ToDatatypeExprArray()
+    {
+        int n = size();
+        DatatypeExpr[] res = new DatatypeExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (DatatypeExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an FPExpr[]
+     * */   
+    public FPExpr[] ToFPExprArray()
+    {
+        int n = size();
+        FPExpr[] res = new FPExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (FPExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an FPRMExpr[]
+     * */
+    public FPRMExpr[] ToFPRMExprArray()
+    {
+        int n = size();
+        FPRMExpr[] res = new FPRMExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (FPRMExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an IntExpr[]
+     * */ 
+    public IntExpr[] ToIntExprArray()
+    {
+        int n = size();
+        IntExpr[] res = new IntExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (IntExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+
+    /**
+     * Translates the AST vector into an RealExpr[]
+     * */   
+    public RealExpr[] ToRealExprArray()
+    {
+        int n = size();
+        RealExpr[] res = new RealExpr[n];
+        for (int i = 0; i < n; i++)
+            res[i] = (RealExpr)Expr.create(getContext(), get(i).getNativeObject());
+        return res;
+    }
+}

src/api/java/Context.java

@@ -361,6 +361,23 @@ public class Context extends IDisposable
         return mkDatatypeSorts(mkSymbols(names), c);
     }
 
+    /**
+     * Update a datatype field at expression t with value v.
+     * The function performs a record update at t. The field
+     * that is passed in as argument is updated with value v,
+     * the remainig fields of t are unchanged.	
+     **/
+    public Expr MkUpdateField(FuncDecl field, Expr t, Expr v) 
+            throws Z3Exception
+    {
+	return Expr.create
+	    (this, 
+	     Native.datatypeUpdateField
+	     (nCtx(), field.getNativeObject(),
+	      t.getNativeObject(), v.getNativeObject()));		
+    }
+
+
     /**
      * Creates a new function declaration.
      **/
@@ -1708,32 +1725,31 @@ public class Context extends IDisposable
     /**
      * Create an empty set.
      **/
-    public Expr mkEmptySet(Sort domain)
+    public ArrayExpr mkEmptySet(Sort domain)
     {
         checkContextMatch(domain);
-        return Expr.create(this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkEmptySet(nCtx(), domain.getNativeObject()));
     }
 
     /**
      * Create the full set.
      **/
-    public Expr mkFullSet(Sort domain)
+    public ArrayExpr mkFullSet(Sort domain)
     {
         checkContextMatch(domain);
-        return Expr.create(this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkFullSet(nCtx(), domain.getNativeObject()));
     }
 
     /**
      * Add an element to the set.
      **/
-    public Expr mkSetAdd(Expr set, Expr element)
+    public ArrayExpr mkSetAdd(ArrayExpr set, Expr element)
     {
         checkContextMatch(set);
         checkContextMatch(element);
-        return Expr.create(
-                this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetAdd(nCtx(), set.getNativeObject(),
                         element.getNativeObject()));
     }
@@ -1741,12 +1757,11 @@ public class Context extends IDisposable
     /**
      * Remove an element from a set.
      **/
-    public Expr mkSetDel(Expr set, Expr element)
+    public ArrayExpr mkSetDel(ArrayExpr set, Expr element)
     {
         checkContextMatch(set);
         checkContextMatch(element);
-        return Expr.create(
-                this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetDel(nCtx(), set.getNativeObject(),
                         element.getNativeObject()));
     }
@@ -1754,11 +1769,10 @@ public class Context extends IDisposable
     /**
      * Take the union of a list of sets.
      **/
-    public Expr mkSetUnion(Expr... args)
+    public ArrayExpr mkSetUnion(ArrayExpr... args)
     {
         checkContextMatch(args);
-        return Expr.create(
-                this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetUnion(nCtx(), (int) args.length,
                         AST.arrayToNative(args)));
     }
@@ -1766,11 +1780,10 @@ public class Context extends IDisposable
     /**
      * Take the intersection of a list of sets.
      **/
-    public Expr mkSetIntersection(Expr... args)
+    public ArrayExpr mkSetIntersection(ArrayExpr... args)
     {
         checkContextMatch(args);
-        return Expr.create(
-                this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetIntersect(nCtx(), (int) args.length,
                         AST.arrayToNative(args)));
     }
@@ -1778,12 +1791,11 @@ public class Context extends IDisposable
     /**
      * Take the difference between two sets.
      **/
-    public Expr mkSetDifference(Expr arg1, Expr arg2)
+    public ArrayExpr mkSetDifference(ArrayExpr arg1, ArrayExpr arg2)
     {
         checkContextMatch(arg1);
         checkContextMatch(arg2);
-        return Expr.create(
-                this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetDifference(nCtx(), arg1.getNativeObject(),
                         arg2.getNativeObject()));
     }
@@ -1791,22 +1803,21 @@ public class Context extends IDisposable
     /**
      * Take the complement of a set.
      **/
-    public Expr mkSetComplement(Expr arg)
+    public ArrayExpr mkSetComplement(ArrayExpr arg)
     {
         checkContextMatch(arg);
-        return Expr.create(this,
+        return (ArrayExpr)Expr.create(this,
                 Native.mkSetComplement(nCtx(), arg.getNativeObject()));
     }
 
     /**
      * Check for set membership.
      **/
-    public Expr mkSetMembership(Expr elem, Expr set)
+    public BoolExpr mkSetMembership(Expr elem, ArrayExpr set)
     {
         checkContextMatch(elem);
         checkContextMatch(set);
-        return Expr.create(
-                this,
+        return (BoolExpr) Expr.create(this,
                 Native.mkSetMember(nCtx(), elem.getNativeObject(),
                         set.getNativeObject()));
     }
@@ -1814,12 +1825,11 @@ public class Context extends IDisposable
     /**
      * Check for subsetness of sets.
      **/
-    public Expr mkSetSubset(Expr arg1, Expr arg2)
+    public BoolExpr mkSetSubset(ArrayExpr arg1, ArrayExpr arg2)
     {
         checkContextMatch(arg1);
         checkContextMatch(arg2);
-        return Expr.create(
-                this,
+        return (BoolExpr) Expr.create(this,
                 Native.mkSetSubset(nCtx(), arg1.getNativeObject(),
                         arg2.getNativeObject()));
     }
@@ -2786,6 +2796,14 @@ public class Context extends IDisposable
         return new Fixedpoint(this);
     }
 
+    /**
+     * Create a Optimize context.
+     **/
+    public Optimize mkOptimize()
+    {
+        return new Optimize(this);
+    }
+
     
     /**
      * Create the floating-point RoundingMode sort.
@@ -3661,6 +3679,7 @@ public class Context extends IDisposable
     private StatisticsDecRefQueue m_Statistics_DRQ = new StatisticsDecRefQueue(10);
     private TacticDecRefQueue m_Tactic_DRQ = new TacticDecRefQueue(10);
     private FixedpointDecRefQueue m_Fixedpoint_DRQ = new FixedpointDecRefQueue(10);
+    private OptimizeDecRefQueue m_Optimize_DRQ = new OptimizeDecRefQueue(10);
 
     public IDecRefQueue getASTDRQ()
     {
@@ -3737,6 +3756,11 @@ public class Context extends IDisposable
         return m_Fixedpoint_DRQ;
     }
 
+    public IDecRefQueue getOptimizeDRQ()
+    {
+        return m_Optimize_DRQ;
+    }
+
     protected long m_refCount = 0;
 
     /**

src/api/java/FPNum.java

@@ -43,6 +43,21 @@ public class FPNum extends FPExpr
         return Native.fpaGetNumeralSignificandString(getContext().nCtx(), getNativeObject());
     }
 
+    /**
+     * The significand value of a floating-point numeral as a UInt64
+     * Remarks: This function extracts the significand bits, without the 
+     * hidden bit or normalization. Throws an exception if the
+     * significand does not fit into a UInt64.
+     * @throws Z3Exception
+     **/
+    public long getSignificandUInt64()
+    {
+        Native.LongPtr res = new Native.LongPtr();
+        if (Native.fpaGetNumeralSignificandUint64(getContext().nCtx(), getNativeObject(), res) ^ true)
+            throw new Z3Exception("Significand is not a 64 bit unsigned integer");
+        return res.value;
+    }
+    
     /**
      * Return the exponent value of a floating-point numeral as a string
      * @throws Z3Exception 

src/api/java/FPSort.java

@@ -43,7 +43,7 @@ public class FPSort extends Sort
      * The number of significand bits.
      */
     public int getSBits() {
-        return Native.fpaGetEbits(getContext().nCtx(), getNativeObject());        
+        return Native.fpaGetSbits(getContext().nCtx(), getNativeObject());        
     }
     
 }

src/api/java/Fixedpoint.java

@@ -213,7 +213,6 @@ public class Fixedpoint extends Z3Object
      **/
     public String getReasonUnknown()
     {
-
         return Native.fixedpointGetReasonUnknown(getContext().nCtx(),
                 getNativeObject());
     }
@@ -295,14 +294,8 @@ public class Fixedpoint extends Z3Object
      **/
     public BoolExpr[] getRules()
     {
-
-        ASTVector v = new ASTVector(getContext(), Native.fixedpointGetRules(
-                getContext().nCtx(), getNativeObject()));
-        int n = v.size();
-        BoolExpr[] res = new BoolExpr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = new BoolExpr(getContext(), v.get(i).getNativeObject());
-        return res;
+        ASTVector v = new ASTVector(getContext(), Native.fixedpointGetRules(getContext().nCtx(), getNativeObject()));
+        return v.ToBoolExprArray();
     }
 
     /**
@@ -312,17 +305,45 @@ public class Fixedpoint extends Z3Object
      **/
     public BoolExpr[] getAssertions()
     {
-
-        ASTVector v = new ASTVector(getContext(), Native.fixedpointGetAssertions(
-                getContext().nCtx(), getNativeObject()));
-        int n = v.size();
-        BoolExpr[] res = new BoolExpr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = new BoolExpr(getContext(), v.get(i).getNativeObject());
-        return res;
+        ASTVector v = new ASTVector(getContext(), Native.fixedpointGetAssertions(getContext().nCtx(), getNativeObject()));
+        return v.ToBoolExprArray();
     }
 
-    Fixedpoint(Context ctx, long obj)
+    /**
+     * Fixedpoint statistics.
+     * 
+     * @throws Z3Exception
+     **/
+    public Statistics getStatistics()
+    {
+        return new Statistics(getContext(), Native.fixedpointGetStatistics(
+                getContext().nCtx(), getNativeObject()));
+    }
+
+    /** 
+     * Parse an SMT-LIB2 file with fixedpoint rules. 
+     * Add the rules to the current fixedpoint context. 
+     * Return the set of queries in the file.
+     **/        
+    public BoolExpr[] ParseFile(String file)
+    {
+        ASTVector av = new ASTVector(getContext(), Native.fixedpointFromFile(getContext().nCtx(), getNativeObject(), file));
+        return av.ToBoolExprArray();
+    }
+
+    /** 
+     * Parse an SMT-LIB2 string with fixedpoint rules. 
+     * Add the rules to the current fixedpoint context. 
+     * Return the set of queries in the file.
+     **/ 
+    public BoolExpr[] ParseString(String s)
+    {
+        ASTVector av = new ASTVector(getContext(), Native.fixedpointFromString(getContext().nCtx(), getNativeObject(), s));
+        return av.ToBoolExprArray();
+    }
+    
+
+    Fixedpoint(Context ctx, long obj) throws Z3Exception
     {
         super(ctx, obj);
     }

src/api/java/FuncDecl.java

@@ -26,31 +26,25 @@ import com.microsoft.z3.enumerations.Z3_parameter_kind;
  **/
 public class FuncDecl extends AST
 {
-    /**
-     * Comparison operator.
-     * 
-     * @return True if {@code a"/> and <paramref name="b} share the
-     *         same context and are equal, false otherwise.
-     **/
-    /* Overloaded operators are not translated. */
-
-    /**
-     * Comparison operator.
-     * 
-     * @return True if {@code a"/> and <paramref name="b} do not
-     *         share the same context or are not equal, false otherwise.
-     **/
-    /* Overloaded operators are not translated. */
-
     /**
      * Object comparison.
      **/
     public boolean equals(Object o)
     {
-        FuncDecl casted = (FuncDecl) o;
-        if (casted == null)
+        FuncDecl casted = null;
+
+        try {
+            casted = FuncDecl.class.cast(o);
+        } catch (ClassCastException e) {
             return false;
-        return this == casted;
+        }
+
+	return  
+	    (this == casted) || 
+	    (this != null) &&
+	    (casted != null) &&
+	    (getContext().nCtx() == casted.getContext().nCtx()) &&
+	    (Native.isEqFuncDecl(getContext().nCtx(), getNativeObject(), casted.getNativeObject()));
     }
 
     /**

src/api/java/Goal.java

@@ -221,6 +221,22 @@ public class Goal extends Z3Object
             return "Z3Exception: " + e.getMessage();
         }
     }
+    
+    /** 
+     * Goal to BoolExpr conversion.
+     *  
+     * Returns a string representation of the Goal.
+     **/
+    public BoolExpr AsBoolExpr() {
+        int n = size();
+        if (n == 0) 
+            return getContext().mkTrue();
+        else if (n == 1)                
+            return getFormulas()[0];
+        else {
+            return getContext().mkAnd(getFormulas());
+        }
+    }
 
     Goal(Context ctx, long obj)
     {

src/api/java/InterpolationContext.java

@@ -73,20 +73,23 @@ public class InterpolationContext extends Context
      * well documented.
      * @throws Z3Exception 
      **/
-    public Expr[] GetInterpolant(Expr pf, Expr pat, Params p)
+    public BoolExpr[] GetInterpolant(Expr pf, Expr pat, Params p)
     {
         checkContextMatch(pf);
         checkContextMatch(pat);
         checkContextMatch(p);
 
         ASTVector seq = new ASTVector(this, Native.getInterpolant(nCtx(), pf.getNativeObject(), pat.getNativeObject(), p.getNativeObject()));
-        int n = seq.size();
-        Expr[] res = new Expr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = Expr.create(this, seq.get(i).getNativeObject());
-        return res;
+        return seq.ToBoolExprArray();
     }
 
+    public class ComputeInterpolantResult 
+    {
+        public Z3_lbool status = Z3_lbool.Z3_L_UNDEF;
+        public BoolExpr[] interp = null;
+        public Model model = null;
+    };
+    
     /**
      * Computes an interpolant.   
      * Remarks: For more information on interpolation please refer
@@ -94,17 +97,20 @@ public class InterpolationContext extends Context
      * well documented.
      * @throws Z3Exception 
      **/
-    public Z3_lbool ComputeInterpolant(Expr pat, Params p, ASTVector interp, Model model)
+    public ComputeInterpolantResult ComputeInterpolant(Expr pat, Params p)
     {
         checkContextMatch(pat);
         checkContextMatch(p);
 
+        ComputeInterpolantResult res = new ComputeInterpolantResult();
         Native.LongPtr n_i = new Native.LongPtr();
         Native.LongPtr n_m = new Native.LongPtr();
-        int r = Native.computeInterpolant(nCtx(), pat.getNativeObject(), p.getNativeObject(), n_i, n_m);
-        interp = new ASTVector(this, n_i.value);
-        model = new Model(this, n_m.value);
-        return Z3_lbool.fromInt(r);
+        res.status = Z3_lbool.fromInt(Native.computeInterpolant(nCtx(), pat.getNativeObject(), p.getNativeObject(), n_i, n_m));        
+        if (res.status == Z3_lbool.Z3_L_FALSE)
+            res.interp = (new ASTVector(this, n_i.value)).ToBoolExprArray();
+        if (res.status == Z3_lbool.Z3_L_TRUE) 
+            res.model = new Model(this, n_m.value);
+        return res;
     }
 
     ///  
@@ -118,16 +124,23 @@ public class InterpolationContext extends Context
         return Native.interpolationProfile(nCtx());
     }
 
+    public class CheckInterpolantResult
+    {
+        public int return_value = 0;
+        public String error = null;
+    }
+    
     ///  
     /// Checks the correctness of an interpolant.
     ///    
     /// Remarks: For more information on interpolation please refer
     /// too the function Z3_check_interpolant in the C/C++ API, which is 
     /// well documented.
-    public int CheckInterpolant(Expr[] cnsts, int[] parents, Expr[] interps, String error, Expr[] theory)
+    public CheckInterpolantResult CheckInterpolant(Expr[] cnsts, int[] parents, BoolExpr[] interps, String error, Expr[] theory)
     {
+        CheckInterpolantResult res = new CheckInterpolantResult();
         Native.StringPtr n_err_str = new Native.StringPtr();
-        int r = Native.checkInterpolant(nCtx(),
+        res.return_value = Native.checkInterpolant(nCtx(),
                                         cnsts.length,
                                         Expr.arrayToNative(cnsts),
                                         parents,
@@ -135,41 +148,52 @@ public class InterpolationContext extends Context
                                         n_err_str,
                                         theory.length,
                                         Expr.arrayToNative(theory));
-        error = n_err_str.value;
-        return r;
+        res.error = n_err_str.value;
+        return res;
     }
 
+    public class ReadInterpolationProblemResult 
+    {
+        public int return_value = 0;
+        public Expr[] cnsts;
+        public int[] parents;
+        public String error;
+        public Expr[] theory;
+    };
+    
     ///  
     /// Reads an interpolation problem from a file.
     ///    
     /// Remarks: For more information on interpolation please refer
     /// too the function Z3_read_interpolation_problem in the C/C++ API, which is 
     /// well documented.
-    public int ReadInterpolationProblem(String filename, Expr[] cnsts, int[] parents, String error, Expr[] theory)
+    public ReadInterpolationProblemResult ReadInterpolationProblem(String filename, Expr[] cnsts, int[] parents, String error, Expr[] theory)
     {
+        ReadInterpolationProblemResult res = new ReadInterpolationProblemResult();
+        
         Native.IntPtr n_num = new Native.IntPtr();
         Native.IntPtr n_num_theory = new Native.IntPtr();
         Native.ObjArrayPtr n_cnsts = new Native.ObjArrayPtr();
         Native.UIntArrayPtr n_parents = new Native.UIntArrayPtr();
         Native.ObjArrayPtr n_theory = new Native.ObjArrayPtr();
         Native.StringPtr n_err_str = new Native.StringPtr();
-        int r = Native.readInterpolationProblem(nCtx(), n_num, n_cnsts, n_parents, filename, n_err_str, n_num_theory, n_theory);
+        res.return_value = Native.readInterpolationProblem(nCtx(), n_num, n_cnsts, n_parents, filename, n_err_str, n_num_theory, n_theory);
         int num = n_num.value;
         int num_theory = n_num_theory.value;
-        error = n_err_str.value;
-        cnsts = new Expr[num];
-        parents = new int[num];
+        res.error = n_err_str.value;
+        res.cnsts = new Expr[num];
+        res.parents = new int[num];
         theory = new Expr[num_theory];
         for (int i = 0; i < num; i++)
         {
-            cnsts[i] = Expr.create(this, n_cnsts.value[i]);
-            parents[i] = n_parents.value[i];
+            res.cnsts[i] = Expr.create(this, n_cnsts.value[i]);
+            res.parents[i] = n_parents.value[i];
         }
         for (int i = 0; i < num_theory; i++)
-            theory[i] = Expr.create(this, n_theory.value[i]);
-        return r;
+            res.theory[i] = Expr.create(this, n_theory.value[i]);
+        return res;
     }
-
+    
     ///  
     /// Writes an interpolation problem to a file.
     ///    

src/api/java/Model.java

@@ -273,11 +273,7 @@ public class Model extends Z3Object
 
         ASTVector nUniv = new ASTVector(getContext(), Native.modelGetSortUniverse(
                 getContext().nCtx(), getNativeObject(), s.getNativeObject()));
-        int n = nUniv.size();
-        Expr[] res = new Expr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = Expr.create(getContext(), nUniv.get(i).getNativeObject());
-        return res;
+        return nUniv.ToExprArray();
     }
 
     /**

src/api/java/Optimize.java

@@ -0,0 +1,278 @@
+/**
+Copyright (c) 2015 Microsoft Corporation
+
+Module Name:
+
+    Optimize.java
+
+Abstract:
+
+    Z3 Java API: Optimizes
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2015-07-16
+
+Notes:
+    
+**/
+
+package com.microsoft.z3;
+
+import com.microsoft.z3.enumerations.Z3_lbool;
+
+
+/**
+ * Object for managing optimizization context
+ **/
+public class Optimize extends Z3Object
+{
+    /**
+     * A string that describes all available optimize solver parameters.
+     **/
+    public String getHelp()
+    {
+	return Native.optimizeGetHelp(getContext().nCtx(), getNativeObject());
+    }
+
+    /**
+     * Sets the optimize solver parameters.
+     *
+     * @throws Z3Exception
+     **/
+    public void setParameters(Params value)
+    {
+	Native.optimizeSetParams(getContext().nCtx(), getNativeObject(), value.getNativeObject());
+    }
+
+    /**
+     * Retrieves parameter descriptions for Optimize solver.
+     **/
+    public ParamDescrs getParameterDescriptions()
+    {
+	return new ParamDescrs(getContext(), Native.optimizeGetParamDescrs(getContext().nCtx(), getNativeObject())); 
+    }
+
+    /**
+     * Assert a constraint (or multiple) into the optimize solver.
+     **/        
+    public void Assert(BoolExpr ... constraints)
+    {
+        getContext().checkContextMatch(constraints);
+        for (BoolExpr a : constraints)
+        {
+            Native.optimizeAssert(getContext().nCtx(), getNativeObject(), a.getNativeObject());
+        }
+    }
+
+    /**
+     * Alias for Assert.
+     **/        
+    public void Add(BoolExpr ... constraints)
+    {
+	Assert(constraints);
+    }
+    
+    /**
+     * Handle to objectives returned by objective functions.
+     **/
+    public class Handle
+    {
+	Optimize opt;
+	int handle;
+	Handle(Optimize opt, int h)
+	{
+	    this.opt = opt;
+	    this.handle = h;
+	}
+	
+	/**
+	 * Retrieve a lower bound for the objective handle.
+	 **/        	   	
+	public ArithExpr getLower()
+	{
+	    return opt.GetLower(handle); 
+	}
+	
+	/**            
+	 * Retrieve an upper bound for the objective handle.
+	 **/        	   	
+	public ArithExpr getUpper()
+	{
+	    return opt.GetUpper(handle); 
+	}
+	
+	/**
+	 * Retrieve the value of an objective.
+	 **/        	   	
+	public ArithExpr getValue()
+	{
+	    return getLower(); 
+	}
+
+	/**
+	 * Print a string representation of the handle.
+	 **/        	   	
+        public String toString() 
+        {
+            return getValue().toString();
+        }
+    }
+
+    /**        
+     * Assert soft constraint
+     *
+     * Return an objective which associates with the group of constraints.
+     *
+     **/        
+
+    public Handle AssertSoft(BoolExpr constraint, int weight, String group)
+    {
+	getContext().checkContextMatch(constraint);
+	Symbol s = getContext().mkSymbol(group);
+	return new Handle(this, Native.optimizeAssertSoft(getContext().nCtx(), getNativeObject(), constraint.getNativeObject(), Integer.toString(weight), s.getNativeObject()));
+    }
+    
+
+    /**        
+     * Check satisfiability of asserted constraints.
+     * Produce a model that (when the objectives are bounded and 
+     * don't use strict inequalities) meets the objectives.
+     **/
+
+    public Status Check()
+    {
+	Z3_lbool r = Z3_lbool.fromInt(Native.optimizeCheck(getContext().nCtx(), getNativeObject()));
+	switch (r) {
+	case Z3_L_TRUE:
+	    return Status.SATISFIABLE;
+	case Z3_L_FALSE:
+	    return Status.UNSATISFIABLE;
+	default:
+	    return Status.UNKNOWN;
+	}
+    }
+    
+    /**
+     * Creates a backtracking point.
+     **/
+    public void Push()
+    {
+	Native.optimizePush(getContext().nCtx(), getNativeObject());
+    }
+
+
+    /** 
+     * Backtrack one backtracking point.
+     *
+     * Note that an exception is thrown if Pop is called without a corresponding Push.
+     **/
+     
+    public void Pop()
+    {
+	Native.optimizePop(getContext().nCtx(), getNativeObject());
+    }
+
+
+    /**
+     * The model of the last Check.
+     *
+     * The result is null if Check was not invoked before,
+     * if its results was not SATISFIABLE, or if model production is not enabled.
+     **/
+    public Model getModel()
+    {
+	long x = Native.optimizeGetModel(getContext().nCtx(), getNativeObject());
+	if (x == 0)
+	    return null;
+	else
+	    return new Model(getContext(), x);
+    }
+
+    /** 
+     *  Declare an arithmetical maximization objective.
+     *  Return a handle to the objective. The handle is used as
+     *  to retrieve the values of objectives after calling Check.
+     **/        	
+    public Handle MkMaximize(ArithExpr e)
+    {
+	return new Handle(this, Native.optimizeMaximize(getContext().nCtx(), getNativeObject(), e.getNativeObject()));
+    }
+    
+    /**
+     *  Declare an arithmetical minimization objective. 
+     *  Similar to MkMaximize.
+     **/        	
+    public Handle MkMinimize(ArithExpr e)
+    {
+	return new Handle(this, Native.optimizeMinimize(getContext().nCtx(), getNativeObject(), e.getNativeObject()));
+    }
+    
+    /**
+     *  Retrieve a lower bound for the objective handle.
+     **/        	
+    private ArithExpr GetLower(int index)
+    {
+	return (ArithExpr)Expr.create(getContext(), Native.optimizeGetLower(getContext().nCtx(), getNativeObject(), index));
+    }
+    
+    
+    /**
+     *  Retrieve an upper bound for the objective handle.
+     **/        	
+    private ArithExpr GetUpper(int index)
+    {
+	return (ArithExpr)Expr.create(getContext(), Native.optimizeGetUpper(getContext().nCtx(), getNativeObject(), index));
+    }
+
+    /**
+     * Return a string the describes why the last to check returned unknown
+     **/
+    public String getReasonUnknown()
+    {
+        return Native.optimizeGetReasonUnknown(getContext().nCtx(),
+                getNativeObject());	
+    }
+    
+    
+    /**
+     *  Print the context to a String (SMT-LIB parseable benchmark).
+     **/        	
+    public String toString()
+    {
+	return Native.optimizeToString(getContext().nCtx(), getNativeObject());
+    }
+    
+    /**
+     *  Optimize statistics.
+     **/
+    public Statistics getStatistics()
+    {
+	return new Statistics(getContext(), Native.optimizeGetStatistics(getContext().nCtx(), getNativeObject()));
+    }
+
+
+    Optimize(Context ctx, long obj) throws Z3Exception
+    {
+	super(ctx, obj);
+    }
+
+    Optimize(Context ctx) throws Z3Exception
+    {
+	super(ctx, Native.mkOptimize(ctx.nCtx()));
+    }
+
+    
+    void incRef(long o)
+    {
+        getContext().getOptimizeDRQ().incAndClear(getContext(), o);
+        super.incRef(o);
+    }
+
+    void decRef(long o)
+    {
+        getContext().getOptimizeDRQ().add(o);
+        super.decRef(o);
+    }
+
+}

src/api/java/OptimizeDecRefQueue.java

@@ -0,0 +1,53 @@
+/**
+Copyright (c) 2012-2015 Microsoft Corporation
+   
+Module Name:
+
+    OptimizeDecRefQueue.java
+
+Abstract:
+
+Author:
+
+    @author Christoph Wintersteiger (cwinter) 2012-03-15
+
+Notes:
+    
+**/ 
+
+package com.microsoft.z3;
+
+class OptimizeDecRefQueue extends IDecRefQueue
+{
+    public OptimizeDecRefQueue() 
+    {
+        super();
+    }
+
+    public OptimizeDecRefQueue(int move_limit) 
+    {
+        super(move_limit);
+    }
+
+    protected void incRef(Context ctx, long obj)
+    {
+        try
+        {
+            Native.fixedpointIncRef(ctx.nCtx(), obj);
+        } catch (Z3Exception e)
+        {
+            // OK.
+        }
+    }
+
+    protected void decRef(Context ctx, long obj)
+    {
+        try
+        {
+            Native.fixedpointDecRef(ctx.nCtx(), obj);
+        } catch (Z3Exception e)
+        {
+            // OK.
+        }
+    }
+};

src/api/java/Solver.java

@@ -176,8 +176,7 @@ public class Solver extends Z3Object
      **/
     public int getNumAssertions()
     {
-        ASTVector assrts = new ASTVector(getContext(), Native.solverGetAssertions(
-                getContext().nCtx(), getNativeObject()));
+        ASTVector assrts = new ASTVector(getContext(), Native.solverGetAssertions(getContext().nCtx(), getNativeObject()));
         return assrts.size();
     }
 
@@ -188,13 +187,8 @@ public class Solver extends Z3Object
      **/
     public BoolExpr[] getAssertions()
     {
-        ASTVector assrts = new ASTVector(getContext(), Native.solverGetAssertions(
-                getContext().nCtx(), getNativeObject()));
-        int n = assrts.size();
-        BoolExpr[] res = new BoolExpr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = new BoolExpr(getContext(), assrts.get(i).getNativeObject());
-        return res;
+        ASTVector assrts = new ASTVector(getContext(), Native.solverGetAssertions(getContext().nCtx(), getNativeObject()));
+        return assrts.ToBoolExprArray();
     }
 
     /**
@@ -282,16 +276,11 @@ public class Solver extends Z3Object
      * 
      * @throws Z3Exception
      **/
-    public Expr[] getUnsatCore()
+    public BoolExpr[] getUnsatCore()
     {
 
-        ASTVector core = new ASTVector(getContext(), Native.solverGetUnsatCore(
-                getContext().nCtx(), getNativeObject()));
-        int n = core.size();
-        Expr[] res = new Expr[n];
-        for (int i = 0; i < n; i++)
-            res[i] = Expr.create(getContext(), core.get(i).getNativeObject());
-        return res;
+        ASTVector core = new ASTVector(getContext(), Native.solverGetUnsatCore(getContext().nCtx(), getNativeObject()));        
+        return core.ToBoolExprArray();
     }
 
     /**