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();
}
}
