public void Run() { Dictionary<string, string> cfg = new Dictionary<string, string>() { { "AUTO_CONFIG", "true" } }; using (Context ctx = new Context(cfg)) { RealExpr x = ctx.MkRealConst("x"); RealExpr y = ctx.MkRealConst("y"); RealExpr z = ctx.MkRealConst("z"); Goal g = ctx.MkGoal(); g.Assert(ctx.MkGt(ctx.MkAdd(x, y, z), ctx.MkReal(0))); Probe p = ctx.MkProbe("num-consts"); Console.WriteLine("num-consts: " + p.Apply(g)); Tactic t = ctx.FailIf(ctx.Gt(p, ctx.Const(2))); try { t.Apply(g); } catch (Z3Exception ex) { Console.WriteLine("Tactic failed: " + ex.Message); } Console.WriteLine("trying again..."); g = ctx.MkGoal(); g.Assert(ctx.MkGt(ctx.MkAdd(x, y), ctx.MkReal(0))); Console.WriteLine(t[g]); } }