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NativeContext, NativeSolver, NativeModel - updates for Pex (#5878)

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* WiP:  Disposable, MkAdd, MkApp, MkBool, MkBoolSort, MkBound, MkBvSort, MkFalse, MkTrue, MkIntSort

* WiP: Native z3 mk_ functions

* WiP: mk_ functions for NativeContext

* WiP: add utility functions for getting values

* WiP: Adding more native utility functions

* native model pull

* WiP: NativeContext additions for array access

* WiP: use Z3_symbol in place of managed Symbol

* WiP: add solver, model, and array methods

* WiP: MkSimpleSolver, MkReal

* WiP: GetDomain GetRange

* WiP: MkExists

* Override for MkFuncDecl

* MkConstArray, MkSelect

* WiP: code cleanup

* migrate Context reference to NativeContext

* remove local signing from PR

* minor code cleanup

Co-authored-by: jfleisher <jofleish@microsoft.com>
This commit is contained in:
John Fleisher 2022-03-03 13:41:12 -05:00 • committed by GitHub
parent 811cd9d48d
commit a08be497f7
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4 changed files with 1361 additions and 310 deletions
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55
src/api/dotnet/NativeModel.cs
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@ -19,20 +19,11 @@ Notes:
--*/
using System;
using System.Diagnostics;
using System.Collections.Generic;
namespace Microsoft.Z3
{
using Z3_context = System.IntPtr;
using Z3_ast = System.IntPtr;
using Z3_app = System.IntPtr;
using Z3_sort = System.IntPtr;
using Z3_func_decl = System.IntPtr;
using Z3_model = System.IntPtr;
using Z3_func_interp = System.IntPtr;
using Z3_func_entry = System.IntPtr;
using Z3_sort = System.IntPtr;
/// <summary>
/// A Model contains interpretations (assignments) of constants and functions.
@ -67,7 +58,6 @@ namespace Microsoft.Z3
/// <returns>A FunctionInterpretation if the function has an interpretation in the model, null otherwise.</returns>
public NativeFuncInterp FuncInterp(Z3_func_decl f)
{
Z3_sort_kind sk = (Z3_sort_kind)Native.Z3_get_sort_kind(Context.nCtx, Native.Z3_get_range(Context.nCtx, f));
if (Native.Z3_get_arity(Context.nCtx, f) == 0)
@ -235,7 +225,6 @@ namespace Microsoft.Z3
/// </summary>
public Z3_ast Evaluate(Z3_ast t, bool completion = false) => Eval(t, completion);
/// <summary>
/// Evaluate expression to a double, assuming it is a numeral already.
/// </summary>
@ -253,12 +242,16 @@ namespace Microsoft.Z3
/// <summary>
/// One dimensional array of indices where the array is updated
/// </summary>
public KeyValuePair<Z3_ast,Z3_ast>[] Updates;
public KeyValuePair<Z3_ast, Z3_ast>[] Updates;
/// <summary>
/// default Else case
/// </summary>
public Z3_ast Else;
public Z3_sort[] Domain;
public Z3_sort[] Range;
}
/// <summary>
@ -266,26 +259,34 @@ namespace Microsoft.Z3
/// </summary>
/// <param name="t"></param>
/// <returns>null if the argument does evaluate to a sequence of stores to an array</returns>
public ArrayValue TryGetArrayValue(Z3_ast t)
public bool TryGetArrayValue(Z3_ast t, out ArrayValue result)
{
var r = Eval(t, true);
// check that r is a sequence of store over a constant default array.
var updates = new List<KeyValuePair<Z3_ast, Z3_ast>>();
var result = new ArrayValue();
while (true)
{
// check that r is an app, and the decl-kind is Z3_OP_ARRAY_CONST or Z3_OP_ARRAY_STORE
// if it is Z3_OP_ARRAY_CONST then set result.Else and break;
// if it is ARRAY_STORE, then append to 'updates' and continue
// in other cases return null
return null;
//while (true)
//{
// // check that r is an app, and the decl-kind is Z3_OP_ARRAY_CONST or Z3_OP_ARRAY_STORE
// // if it is Z3_OP_ARRAY_CONST then set result.Else and break;
// // if it is ARRAY_STORE, then append to 'updates' and continue
// // in other cases return null
// return false;
//}
if (updates.Any())
{
result = new ArrayValue()
{
Updates = updates.ToArray()
};
return true;
}
#if false
result.Updates = updates.ToArray();
return null;
#endif
result = null;
return false;
}
/// <summary>