private TransitionInformation ProcessTransitionForWorkUnit(WorkUnit unit, Transition transition)
{
SimulationContext activeContext = unit.Context.CloneCast();
Violation newViolation = null;
TransitionInformation transitionInfo = new TransitionInformation()
{
PreViolation = activeContext.CurrentViolation,
Transition = transition
};
try
{
activeContext.AddVisitedTransition(transitionInfo);
activeContext.CurrentTransition = transition;
transition.Evaluate(activeContext);
newViolation = (Violation)transition.OnSuccess(activeContext);
//
// Associate the transitive violation that is enabled by the current violation.
//
if (newViolation != null)
{
activeContext.CurrentViolation.AddTransitiveViolation(newViolation);
transitionInfo.PostViolation = newViolation;
}
else
{
transitionInfo.PostViolation = transitionInfo.PreViolation;
}
}
catch (ConstraintNotSatisfied ex)
{
activeContext.FailureReason = String.Format("Constraint not satisfied on transition '{0}': {1}", transitionInfo.Transition, ex.Message);
activeContext.Exploitability = 0;
}
if (activeContext.Exploitability == 0)
{
if (activeContext.Global.TrackImpossible)
{
activeContext.Global.AddCompletedSimulationContext(activeContext);
}
return(null);
}
if (this.OnTransition != null)
{
this.OnTransition(transitionInfo);
}
if (Debug)
{
Console.WriteLine("Visited transitions with hash {0},{1},{2} = {3}:",
unit.Context.AssumptionsEquivalenceClass,
unit.Context.TransitionsEquivalenceClass,
unit.Context.ViolationsEquivalenceClass,
unit.Context.InvariantEquivalenceClass
);
foreach (TransitionInformation i in activeContext.VisitedTransitions)
{
Console.WriteLine("\t{0} --> {1} --> {2}",
i.PreViolation,
i.Transition.Label,
i.PostViolation);
}
Console.WriteLine("-------");
}
//
// If the simulation has reached a completion state, log it as successful and return.
//
if (this.IsSimulationComplete != null && this.IsSimulationComplete(activeContext))
{
activeContext.Global.AddCompletedSimulationContext(activeContext);
return(transitionInfo);
}
//
// Add new work units based on the state that we have transitioned to.
//
AddWorkUnits(activeContext, newViolation);
return(transitionInfo);
}
