public void RemoveNoConstraintsBasedOnVars()
{
IConstraintManager CM = new ConstraintManager();
IExprBuilder builder = GetBuilder();
// Dummy Boogie variable
var bv8TypeIdent = new TypedIdent(Token.NoToken, "bv8", Microsoft.Boogie.Type.GetBvType(8));
var dummyVarBv = new GlobalVariable(Token.NoToken, bv8TypeIdent);
// dummyVar needs a programLocation, otherwise SymbolicVariable constructor raises an exception
var progLoc = new ProgramLocation(dummyVarBv);
dummyVarBv.SetMetadata <ProgramLocation>((int)Symbooglix.Annotation.AnnotationIndex.PROGRAM_LOCATION, progLoc);
var s0 = new SymbolicVariable("s0", dummyVarBv).Expr;
var s1 = new SymbolicVariable("s1", dummyVarBv).Expr;
var s2 = new SymbolicVariable("s2", dummyVarBv).Expr;
// Construct some constraints
Expr c0 = builder.Eq(builder.BVAND(s0, s1), builder.ConstantBV(0, 8));
Expr c1 = builder.Eq(s2, builder.ConstantBV(1, 8));
CM.AddConstraint(c0, progLoc);
CM.AddConstraint(c1, progLoc);
var mockSolver = new MockSolver();
var indepenceSolver = new Symbooglix.Solver.ConstraintIndependenceSolver(mockSolver);
Expr queryExpr = builder.Eq(builder.BVAND(s1, s2), builder.ConstantBV(0, 8));
indepenceSolver.ComputeSatisfiability(new Solver.Query(CM, new Constraint(queryExpr)));
// Check no constraints were removed
Assert.AreEqual(2, mockSolver.Constraints.Count);
Assert.AreSame(queryExpr, mockSolver.QueryExpr);
bool c0Found = false;
bool c1Found = false;
foreach (var constraint in mockSolver.Constraints)
{
if (c0 == constraint.Condition)
{
c0Found = true;
}
if (c1 == constraint.Condition)
{
c1Found = true;
}
}
Assert.IsTrue(c0Found);
Assert.IsTrue(c1Found);
}
public override Expr VisitLiteralExpr(LiteralExpr node)
{
if (node.isBool)
{
return((Expr)Builder.ConstantBool(node.asBool));
}
else if (node.isBigNum)
{
return(Builder.ConstantInt(node.asBigNum.ToBigInteger));
}
else if (node.isBigDec)
{
return(Builder.ConstantReal(node.asBigDec));
}
else if (node.isBvConst)
{
var bv = node.asBvConst;
return(Builder.ConstantBV(bv.Value.ToBigInteger, bv.Bits));
}
else
{
throw new NotSupportedException("Unknown LiteralExpr type");
}
}
public void RemoveNoConstraintsBasedOnVarsAndFunctions()
{
IConstraintManager CM = new ConstraintManager();
IExprBuilder builder = GetBuilder();
// Dummy Boogie variable
var bv8Type = Microsoft.Boogie.Type.GetBvType(8);
var bv8TypeIdent = new TypedIdent(Token.NoToken, "bv8", bv8Type);
var dummyVarBv = new GlobalVariable(Token.NoToken, bv8TypeIdent);
// dummyVar needs a programLocation, otherwise SymbolicVariable constructor raises an exception
var progLoc = new ProgramLocation(dummyVarBv);
dummyVarBv.SetMetadata <ProgramLocation>((int)Symbooglix.Annotation.AnnotationIndex.PROGRAM_LOCATION, progLoc);
var s0 = new SymbolicVariable("s0", dummyVarBv).Expr;
var s1 = new SymbolicVariable("s1", dummyVarBv).Expr;
var s2 = new SymbolicVariable("s2", dummyVarBv).Expr;
// Construct some constraints
Expr c0 = builder.Eq(builder.BVAND(s0, s1), builder.ConstantBV(0, 8));
Expr c1 = builder.Eq(s2, builder.ConstantBV(1, 8));
var FCB = new FunctionCallBuilder();
var foobarFunc = FCB.CreateUninterpretedFunctionCall("foobar", bv8Type, new List <Microsoft.Boogie.Type>()
{
bv8Type
});
// foobar(0bv8) == 0bv8
Expr c2 = builder.Eq(builder.UFC(foobarFunc, builder.ConstantBV(0, 8)), builder.ConstantBV(0, 8));
CM.AddConstraint(c0, progLoc);
CM.AddConstraint(c1, progLoc);
CM.AddConstraint(c2, progLoc);
var mockSolver = new MockSolver();
var indepenceSolver = new Symbooglix.Solver.ConstraintIndependenceSolver(mockSolver);
// The query expression uses the "foobar" function so we need to keep constraints on that function
Expr queryExpr = builder.And(builder.Eq(builder.BVAND(s1, s2), builder.ConstantBV(0, 8)),
builder.NotEq(builder.UFC(foobarFunc, s1), s1)
);
indepenceSolver.ComputeSatisfiability(new Solver.Query(CM, new Constraint(queryExpr)));
// Check no constraints were removed
Assert.AreEqual(3, mockSolver.Constraints.Count);
Assert.AreSame(queryExpr, mockSolver.QueryExpr);
bool c0Found = false;
bool c1Found = false;
bool c2Found = false;
foreach (var constraint in mockSolver.Constraints)
{
if (c0 == constraint.Condition)
{
c0Found = true;
}
if (c1 == constraint.Condition)
{
c1Found = true;
}
if (c2 == constraint.Condition)
{
c2Found = true;
}
}
Assert.IsTrue(c0Found);
Assert.IsTrue(c1Found);
Assert.IsTrue(c2Found);
}
public virtual LiteralExpr ConstantBV(int decimalValue, int bitWidth)
{
return(UB.ConstantBV(decimalValue, bitWidth));
}
public void BitVector()
{
CheckType(BvType.GetBvType(2), builder.ConstantBV(3, 2), "(_ BitVec 2)", "(= symbolic_0 (_ bv3 2) )");
}
