/// <summary>
/// Visits the <paramref name="formula." />
/// </summary>
public override void VisitProbabilisticFormula(ProbabilitisticFormula formula)
{
_builder.Append("P { ");
switch (formula.Comparator)
{
case ProbabilisticComparator.LowerThan:
_builder.Append("< ");
break;
case ProbabilisticComparator.LowerEqual:
_builder.Append("<= ");
break;
case ProbabilisticComparator.BiggerThan:
_builder.Append("> ");
break;
case ProbabilisticComparator.BiggerEqual:
_builder.Append(">= ");
break;
default:
throw new ArgumentOutOfRangeException();
}
_builder.Append(formula.CompareToValue.ToString(CultureInfo.InvariantCulture));
_builder.Append(" } [ ");
Visit(formula.Operand);
_builder.Append(" ]");
}
internal override Probability CalculateProbability(Formula formulaToCheck)
{
var workaroundFormula = new ProbabilitisticFormula(formulaToCheck, ProbabilisticComparator.BiggerThan, 0.0);
using (var fileResults = WriteFilesAndExecuteMrmc(workaroundFormula, true))
{
var resultEnumerator = File.ReadLines(fileResults.FilePath).GetEnumerator();
var probability = 0.0;
while (resultEnumerator.MoveNext())
{
var result = resultEnumerator.Current;
if (!String.IsNullOrEmpty(result))
{
var parsed = MrmcProbabilityParser.Match(result);
if (parsed.Success)
{
var state = Int32.Parse(parsed.Groups["state"].Value);
var probabilityOfState = _initialStates[state]; //index in mrmc is 1-based
double probabilityInState;
// Mrmc may return a probability in a state of PositiveInfinity. This is clearly undesired and might be because of a wrong probability matrix
if (parsed.Groups["probability"].Value == "inf")
{
probabilityInState = double.PositiveInfinity;
}
else
{
probabilityInState = Double.Parse(parsed.Groups["probability"].Value, CultureInfo.InvariantCulture);
}
probability += probabilityOfState * probabilityInState;
}
else
{
throw new Exception("Expected different output of MRMC");
}
}
}
return(new Probability(probability));
}
}
/// <summary> /// Visits the <paramref name="formula." /> /// </summary> public abstract void VisitProbabilisticFormula(ProbabilitisticFormula formula);
/// <summary>
/// Visits the <paramref name="formula." />
/// </summary>
public override void VisitProbabilisticFormula(ProbabilitisticFormula formula)
{
_containsInvalidOperators = true;
}
/// <summary>
/// Visits the <paramref name="formula." />
/// </summary>
public override void VisitProbabilisticFormula(ProbabilitisticFormula formula)
{
Visit(formula.Operand);
}