/// <summary>
/// Execute the probe over the goal.
/// </summary>
/// <returns>A probe always produce a double value.
/// "Boolean" probes return 0.0 for false, and a value different from 0.0 for true.</returns>
public double Apply(Goal g)
{
Contract.Requires(g != null);
Context.CheckContextMatch(g);
return Native.Z3_probe_apply(Context.nCtx, NativeObject, g.NativeObject);
}
/// <summary>
/// Apply the probe to a goal.
/// </summary>
public double this[Goal g]
{
get {
Contract.Requires(g != null);
return Apply(g); }
}
/// <summary>
/// Apply the tactic to a goal.
/// </summary>
public ApplyResult this[Goal g]
{
get
{
Contract.Requires(g != null);
Contract.Ensures(Contract.Result<ApplyResult>() != null);
return Apply(g);
}
}
/// <summary>
/// Execute the tactic over the goal.
/// </summary>
public ApplyResult Apply(Goal g, Params p = null)
{
Contract.Requires(g != null);
Contract.Ensures(Contract.Result<ApplyResult>() != null);
Context.CheckContextMatch(g);
if (p == null)
return new ApplyResult(Context, Native.Z3_tactic_apply(Context.nCtx, NativeObject, g.NativeObject));
else
{
Context.CheckContextMatch(p);
return new ApplyResult(Context, Native.Z3_tactic_apply_ex(Context.nCtx, NativeObject, g.NativeObject, p.NativeObject));
}
}
static ApplyResult ApplyTactic(Context ctx, Tactic t, Goal g)
{
Console.WriteLine("\nGoal: " + g);
ApplyResult res = t.Apply(g);
Console.WriteLine("Application result: " + res);
Status q = Status.UNKNOWN;
foreach (Goal sg in res.Subgoals)
if (sg.IsDecidedSat) q = Status.SATISFIABLE;
else if (sg.IsDecidedUnsat) q = Status.UNSATISFIABLE;
switch (q)
{
case Status.UNKNOWN:
Console.WriteLine("Tactic result: Undecided");
break;
case Status.SATISFIABLE:
Console.WriteLine("Tactic result: SAT");
break;
case Status.UNSATISFIABLE:
Console.WriteLine("Tactic result: UNSAT");
break;
}
return res;
}
static void SolveTactical(Context ctx, Tactic t, Goal g, Status sat)
{
Solver s = ctx.MkSolver(t);
Console.WriteLine("\nTactical solver: " + s);
foreach (BoolExpr a in g.Formulas)
s.Assert(a);
Console.WriteLine("Solver: " + s);
if (s.Check() != sat)
throw new TestFailedException();
}
