internal override Probability CalculateMinimalProbability(Formula formulaToCheck)
{
var isFormulaReturningBoolVisitor = new IsFormulaReturningBoolValueVisitor();
isFormulaReturningBoolVisitor.Visit(formulaToCheck);
if (!isFormulaReturningBoolVisitor.IsFormulaReturningBoolValue)
{
throw new Exception("expected formula which returns a bool");
}
var transformationVisitor = new PrismTransformer();
transformationVisitor.Visit(formulaToCheck);
var formulaToCheckInnerString = transformationVisitor.TransformedFormula;
var formulaToCheckString = "Pmin=? [ " + formulaToCheckInnerString + "]";
using (var fileProperties = new TemporaryFile("props"))
{
File.WriteAllText(fileProperties.FilePath, formulaToCheckString);
var prismArguments = _filePrism.FilePath + " " + fileProperties.FilePath;
var prismProcess = new PrismProcess(_output);
var quantitativeResult = prismProcess.ExecutePrismAndParseResult(prismArguments);
return(new Probability(quantitativeResult.ResultingProbability));
}
}
internal override bool CalculateBoolean(Formula formulaToCheck)
{
var isFormulaReturningBoolValueVisitor = new IsFormulaReturningBoolValueVisitor();
isFormulaReturningBoolValueVisitor.Visit(formulaToCheck);
if (!isFormulaReturningBoolValueVisitor.IsFormulaReturningBoolValue)
{
throw new Exception("expected formula which returns true or false");
}
using (var fileResults = WriteFilesAndExecuteMrmc(formulaToCheck, false))
{
var resultEnumerator = File.ReadLines(fileResults.FilePath).GetEnumerator();
var satisfied = true;
while (resultEnumerator.MoveNext())
{
var result = resultEnumerator.Current;
if (!String.IsNullOrEmpty(result))
{
var parsed = MrmcFormulaParser.Match(result);
if (parsed.Success)
{
var state = Int32.Parse(parsed.Groups["state"].Value);
var probabilityOfState = _initialStates[state];
if (probabilityOfState > 0.0)
{
var isSatisfiedResult = parsed.Groups["satisfied"].Value.Equals("TRUE");
satisfied &= isSatisfiedResult; // TODO: Check PCTL semantics: should formula be true for all initial states >0.0? Or should the initial probability be taken into account for the probability value of the outermost operator.
}
}
else
{
throw new Exception("Expected different output of MRMC");
}
}
}
return(satisfied);
}
}
