private static void GenerateConstraints(CWExpr choiceExpr, int maxNumVariables, VariableCache.ConstraintMode constraintMode, Context z3Context, Solver z3Solver)
{
VariableCache variableGenerator = VariableCache.Create(constraintMode);
choiceExpr.ToSMTConstraints(z3Context, z3Solver, maxNumVariables, variableGenerator);
variableGenerator.GenerateAdditionalConstraints(z3Context, z3Solver);
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
/* constraint variable in { 0, 1 }
* 0 -> and
* 1 -> or
*/
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(Enum.GetNames(typeof(WCCompound.Logic)).Length - 1)));
this.cond1.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.cond2.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
this.constraintVariable = variableGenerator.GetVarChoiceVariable(orgId);
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(maxNumVars - 1)));
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
/* constraint variable in { 0, 1 }
* 0 -> eq
* 1 -> neq
*/
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(1)));
this.x.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
/* constraint variable in { 0, ..., 5 }
* -> eq, l, leq, neq, g, geq
*/
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(Enum.GetNames(typeof(WCComparison.CompareType)).Length - 1)));
this.arg1.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
//Currently, arg2 may be concretized to a 0 constant, possibly resulting in an '== 0' or '!= 0' condition, which is a simple condition.
this.arg2.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(2)));
this.lhs.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.arg1.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.arg2.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
/* constraint variable in { 0, 1 }
* 0 -> plus
* 1 -> minus
*/
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(0), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(Enum.GetNames(typeof(WEArith.ArithOp)).Length - 1)));
this.lhs.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.arg1.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.arg2.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
/* Traverses the choice tree, creating constraints in the <z3Context>. * Stores identifiers in <constraintVariable>. * <maxNumVars> is the number of distinct WEVars in the original program. Only used in CWEVar.ToSMTConstraints. */ public abstract void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator);
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
this.constraintVariable = variableGenerator.GetFreshVariableName();
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
z3Solver.Assert(z3Context.MkEq(z3Context.MkInt(0), myVariable));
this.condition.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
this.thenBody.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
if (elseBody != null)
{
this.elseBody.ToSMTConstraints(z3Context, z3Solver, maxNumVars, variableGenerator);
}
}
public override void ToSMTConstraints(Context z3Context, Solver z3Solver, int maxNumVars, VariableCache variableGenerator)
{
this.constraintVariable = variableGenerator.GetConstChoiceVariable(orgValue);
ArithExpr myVariable = z3Context.MkIntConst(this.constraintVariable);
//range for variation of constants
//TODO: allow 0?
int lowerBound = Math.Max((int)(this.orgValue / 2), 0);
int upperBound = Math.Max((int)(this.orgValue * 2), 0);
z3Solver.Assert(z3Context.MkLe(z3Context.MkInt(lowerBound), myVariable));
z3Solver.Assert(z3Context.MkLe(myVariable, z3Context.MkInt(upperBound)));
}
