static void ExecuteZ3(string fileName, Z3BaseDirective directive) { SolverContext context = SolverContext.GetContext(); try { LoadModel(context, fileName); Solution solution = context.Solve(directive); Report report = solution.GetReport(); Console.Write("{0}", report); } catch (Exception e) { Console.WriteLine("Skipping unsolvable instance in {0} with error message '{1}'.", fileName, e.Message); } finally { context.ClearModel(); } }
static void ConvertToSMT2(string fileName, Z3BaseDirective directive) { SolverContext context = SolverContext.GetContext(); try { LoadModel(context, fileName); if (context.CurrentModel.Goals.Any()) { directive.SMT2LogFile = Path.ChangeExtension(fileName, ".smt2"); context.Solve(() => true, directive); } } catch (Exception e) { Console.WriteLine("Skipping unconvertable instance in {0} with error message '{1}'.", fileName, e.Message); } finally { context.ClearModel(); } }
static void ValidateZ3(string fileName, Z3BaseDirective directive) { SolverContext context = SolverContext.GetContext(); try { LoadModel(context, fileName); if (context.CurrentModel.Goals.Any()) { var msfDirective = (directive is Z3MILPDirective) ? (Directive)new MixedIntegerProgrammingDirective() { TimeLimit = 10000 } : (Directive)new Directive() { TimeLimit = 10000 }; var sol1 = context.Solve(msfDirective); Console.WriteLine("Solved the model using MSF."); Console.Write("{0}", sol1.GetReport()); var expectedGoals = sol1.Goals.Select(x => x.ToDouble()); context.ClearModel(); context.LoadModel(FileFormat.OML, Path.GetFullPath(fileName)); directive.SMT2LogFile = Path.ChangeExtension(fileName, ".smt2"); var sol2 = context.Solve(directive); //Console.Write("{0}", sol2.GetReport()); var actualGoals = sol2.Goals.Select(x => x.ToDouble()); Console.WriteLine("Solved the model using Z3."); var goalPairs = expectedGoals.Zip(actualGoals, (expected, actual) => new { expected, actual }).ToArray(); bool validated = goalPairs.All(p => Math.Abs(p.expected - p.actual) <= 0.0001); if (validated) { Console.WriteLine("INFO: Two solvers give approximately the same results."); } else { Console.Error.WriteLine("ERROR: Discrepancy found between results."); if (!validated && File.Exists(directive.SMT2LogFile)) { var sb = new StringBuilder(); for(int i = 0; i < goalPairs.Length; i++) { sb.AppendFormat("\n(echo \"Goal {0}: actual |-> {1:0.0000}, expected |-> {2:0.0000}\")", i + 1, goalPairs[i].actual, goalPairs[i].expected); } Console.Error.WriteLine(sb.ToString()); File.AppendAllText(directive.SMT2LogFile, sb.ToString()); } } } else { Console.WriteLine("Ignoring this instance without having any goal."); } } catch (Exception e) { Console.WriteLine("Skipping unsolvable instance in {0} with error message '{1}'.", fileName, e.Message); } finally { context.ClearModel(); } }