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Bugfix and new examples for implicit assumptions in Z3_solver_assert_and_track. Thanks to Amir Ebrahimi for reporting this issue!

Browse source 
(See http://stackoverflow.com/questions/28558683/modeling-constraints-in-z3-and-unsat-core-cases)

Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
This commit is contained in:
Christoph M. Wintersteiger 2015-02-18 16:25:27 +00:00
parent d3fb5f2a4c
commit 9b137d54d3
5 changed files with 111 additions and 3 deletions
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42
examples/dotnet/Program.cs
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@ -2010,6 +2010,47 @@ namespace test_mapi
}
}
/// <summary>
/// Extract unsatisfiable core example with AssertAndTrack
/// </summary>
public static void UnsatCoreAndProofExample2(Context ctx)
{
Console.WriteLine("UnsatCoreAndProofExample2");
Solver solver = ctx.MkSolver();
BoolExpr pa = ctx.MkBoolConst("PredA");
BoolExpr pb = ctx.MkBoolConst("PredB");
BoolExpr pc = ctx.MkBoolConst("PredC");
BoolExpr pd = ctx.MkBoolConst("PredD");
BoolExpr f1 = ctx.MkAnd(new BoolExpr[] { pa, pb, pc });
BoolExpr f2 = ctx.MkAnd(new BoolExpr[] { pa, ctx.MkNot(pb), pc });
BoolExpr f3 = ctx.MkOr(ctx.MkNot(pa), ctx.MkNot(pc));
BoolExpr f4 = pd;
BoolExpr p1 = ctx.MkBoolConst("P1");
BoolExpr p2 = ctx.MkBoolConst("P2");
BoolExpr p3 = ctx.MkBoolConst("P3");
BoolExpr p4 = ctx.MkBoolConst("P4");
solver.AssertAndTrack(f1, p1);
solver.AssertAndTrack(f2, p2);
solver.AssertAndTrack(f3, p3);
solver.AssertAndTrack(f4, p4);
Status result = solver.Check();
if (result == Status.UNSATISFIABLE)
{
Console.WriteLine("unsat");
Console.WriteLine("core: ");
foreach (Expr c in solver.UnsatCore)
{
Console.WriteLine("{0}", c);
}
}
}
public static void FiniteDomainExample(Context ctx)
{
Console.WriteLine("FiniteDomainExample");
@ -2164,6 +2205,7 @@ namespace test_mapi
TreeExample(ctx);
ForestExample(ctx);
UnsatCoreAndProofExample(ctx);
UnsatCoreAndProofExample2(ctx);
}
// These examples need proof generation turned on and auto-config set to false.