private void FailuresInclusionCheckBFSAntiChain(Automata spec)
{
Queue <ConfigurationBase> pendingImpl = new Queue <ConfigurationBase>(1000);
Queue <NormalizedFAState> pendingSpec = new Queue <NormalizedFAState>(1000);
Queue <List <ConfigurationBase> > paths = new Queue <List <ConfigurationBase> >(1024);
NormalizedFAState initialSpec = (new NormalizedFAState(spec.InitialState)).TauReachable();
//implementation initial state
pendingImpl.Enqueue(InitialStep);
//specification initial state
pendingSpec.Enqueue(initialSpec);
List <ConfigurationBase> path = new List <ConfigurationBase>();
path.Add(InitialStep);
paths.Enqueue(path);
AntiChain antichain = new AntiChain();
antichain.Add(InitialStep.GetID(), initialSpec.States);
while (pendingImpl.Count > 0)
{
if (CancelRequested)
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
return;
}
ConfigurationBase currentImpl = pendingImpl.Dequeue();
NormalizedFAState currentSpec = pendingSpec.Dequeue();
List <ConfigurationBase> currentPath = paths.Dequeue();
IEnumerable <ConfigurationBase> nextImpl = currentImpl.MakeOneMove();
VerificationOutput.Transitions += nextImpl.Count();
List <string> negatedRefusal = new List <string>();
bool hasTau = false;
//for (int k = 0; k < nextImpl.Length; k++)
foreach (ConfigurationBase next in nextImpl)
{
//ConfigurationBase next = nextImpl[k];
NormalizedFAState nextSpec = currentSpec;
if (next.Event != Constants.TAU)
{
negatedRefusal.Add(next.Event);
nextSpec = currentSpec.NextWithTauReachable(next.Event);
if (nextSpec.States.Count == 0)
{
currentPath.Add(next);
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = currentPath;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.TraceRefinementFailure;
return;
}
}
else
{
hasTau = true;
}
if (!antichain.Add(next.GetID(), nextSpec.States))
{
pendingImpl.Enqueue(next);
pendingSpec.Enqueue(nextSpec);
List <ConfigurationBase> newPath = new List <ConfigurationBase>(currentPath);
newPath.Add(next);
paths.Enqueue(newPath);
}
}
//if the implememtation state is stable, then check for failures inclusion
if (!hasTau)
{
//enabledS is empty if and only if the spec state is divergent.
if (!RefusalContainment(negatedRefusal, currentSpec.GetFailuresNegate()))
{
//return toReturn;
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = currentPath;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.FailuresRefinementFailure;
return;
}
}
}
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.VerificationResult = VerificationResultType.VALID;
FailureType = RefinementCheckingResultType.Valid;
}
private void FailuresDivergenceInclusionCheckBFSAntichain(Automata spec)
{
Stack <ConfigurationBase> pendingImpl = new Stack <ConfigurationBase>(1000);
Stack <NormalizedFAState> pendingSpec = new Stack <NormalizedFAState>(1000);
Queue <List <ConfigurationBase> > paths = new Queue <List <ConfigurationBase> >(1024);
NormalizedFAState initialSpec = (new NormalizedFAState(spec.InitialState)).TauReachable();
//implementation initial state
pendingImpl.Push(InitialStep);
//specification initial state
pendingSpec.Push(initialSpec);
List <ConfigurationBase> path = new List <ConfigurationBase>();
path.Add(InitialStep);
paths.Enqueue(path);
AntiChain antichain = new AntiChain();
antichain.Add(InitialStep.GetID(), initialSpec.States);
while (pendingImpl.Count > 0)
{
if (CancelRequested)
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
return;
}
ConfigurationBase currentImpl = pendingImpl.Pop();
NormalizedFAState currentSpec = pendingSpec.Pop();
List <ConfigurationBase> currentPath = paths.Dequeue();
if (currentSpec.IsDiv())
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.VerificationResult = VerificationResultType.VALID;
FailureType = RefinementCheckingResultType.Valid;
return;
}
bool implIsDiv = currentImpl.IsDivergent();
if (implIsDiv)
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
VerificationOutput.CounterExampleTrace = currentPath;
FailureType = RefinementCheckingResultType.DivCheckingFailure;
return;
}
IEnumerable <ConfigurationBase> nextImpl = currentImpl.MakeOneMove();
VerificationOutput.Transitions += nextImpl.Count();
List <string> negatedRefusal = new List <string>();
bool hasTau = false;
//for (int i = 0; i < nextImpl.Length; i++)
foreach (ConfigurationBase next in nextImpl)
{
NormalizedFAState nextSpec = currentSpec;
if (next.Event != Constants.TAU)
{
negatedRefusal.Add(next.Event);
//nextSpec = currentSpec.Post[nextImpl[i].Event];
nextSpec = currentSpec.NextWithTauReachable(next.Event);
//The following checks if a violation is found.
//First, check for trace refinement, which is necessary for all other refinement as well.
if (nextSpec.States.Count == 0)
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = currentPath;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.TraceRefinementFailure;
return;
}
}
else
{
hasTau = true;
}
if (!antichain.Add(next.GetID(), nextSpec.States))
{
pendingImpl.Push(next);
pendingSpec.Push(nextSpec);
List <ConfigurationBase> newPath = new List <ConfigurationBase>(currentPath);
newPath.Add(next);
paths.Enqueue(newPath);
}
}
//if the implememtation state is stable, then check for failures inclusion
if (!hasTau)
{
//enabledS is empty if and only if the spec state is divergent.
if (!RefusalContainment(negatedRefusal, currentSpec.GetFailuresNegate()))
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = currentPath;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.FailuresRefinementFailure;
return;
}
}
}
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.VerificationResult = VerificationResultType.VALID;
FailureType = RefinementCheckingResultType.Valid;
}
private void FailuresInclusionCheckDFSAntiChain(Automata spec)
{
Stack <ConfigurationBase> pendingImpl = new Stack <ConfigurationBase>(1024);
Stack <NormalizedFAState> pendingSpec = new Stack <NormalizedFAState>(1024);
List <ConfigurationBase> toReturn = new List <ConfigurationBase>();
//The following are for identifying a counterexample trace.
Stack <int> depthStack = new Stack <int>(1000);
depthStack.Push(0);
List <int> depthList = new List <int>(1000);
//The above are for identifying a counterexample trace.
NormalizedFAState initialSpec = (new NormalizedFAState(spec.InitialState)).TauReachable();
//implementation initial state
pendingImpl.Push(InitialStep);
//specification initial state
pendingSpec.Push(initialSpec);
AntiChain antichain = new AntiChain();
antichain.Add(InitialStep.GetID(), initialSpec.States);
while (pendingImpl.Count > 0)
{
if (CancelRequested)
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
return;
}
ConfigurationBase currentImpl = pendingImpl.Pop();
NormalizedFAState currentSpec = pendingSpec.Pop();
//The following are for identifying a counterexample trace.
int depth = depthStack.Pop();
if (depth > 0)
{
while (depthList[depthList.Count - 1] >= depth)
{
int lastIndex = depthList.Count - 1;
depthList.RemoveAt(lastIndex);
toReturn.RemoveAt(lastIndex);
}
}
toReturn.Add(currentImpl);
depthList.Add(depth);
//The above are for identifying a counterexample trace.
//if the implememtation state is stable, then check for failures inclusion
IEnumerable <ConfigurationBase> nextImpl = currentImpl.MakeOneMove();
VerificationOutput.Transitions += nextImpl.Count();
List <string> negatedRefusal = new List <string>();
bool hasTau = false;
//for (int k = 0; k < nextImpl.Length; k++)
foreach (ConfigurationBase next in nextImpl)
{
//ConfigurationBase next = nextImpl[k];
NormalizedFAState nextSpec = currentSpec;
if (next.Event != Constants.TAU)
{
negatedRefusal.Add(next.Event);
nextSpec = currentSpec.NextWithTauReachable(next.Event);
//If the specification has no corresponding state, then it implies that the trace is allowed by the
//implementation but not the specification -- which means trace-refinement is failed.
if (nextSpec.States.Count == 0)
{
toReturn.Add(next);
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = toReturn;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.TraceRefinementFailure;
return;
}
}
else
{
hasTau = true;
}
if (!antichain.Add(next.GetID(), nextSpec.States))
{
pendingImpl.Push(next);
pendingSpec.Push(nextSpec);
depthStack.Push(depth + 1);
}
}
if (!hasTau)
{
if (!RefusalContainment(negatedRefusal, currentSpec.GetFailuresNegate()))
{
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.CounterExampleTrace = toReturn;
VerificationOutput.VerificationResult = VerificationResultType.INVALID;
FailureType = RefinementCheckingResultType.FailuresRefinementFailure;
return;
}
}
}
VerificationOutput.NoOfStates = antichain.GetNoOfStates();
VerificationOutput.VerificationResult = VerificationResultType.VALID;
FailureType = RefinementCheckingResultType.Valid;
}