/// <summary>
/// Replays the transition of the counter example with the zero-baesd <paramref name="transitionIndex" />.
/// </summary>
/// <param name="choiceResolver">The choice resolver that should be used to resolve nondeterministic choices.</param>
/// <param name="transitionIndex">The zero-based index of the transition that should be replayed.</param>
internal unsafe void Replay(ChoiceResolver choiceResolver, int transitionIndex)
{
if (StepCount == 0)
{
return;
}
choiceResolver.Clear();
choiceResolver.PrepareNextState();
choiceResolver.SetChoices(ReplayInfo[transitionIndex]);
fixed(byte *state = States[transitionIndex])
RuntimeModel.Deserialize(state);
foreach (var fault in RuntimeModel.NondeterministicFaults)
{
fault.Reset();
}
if (transitionIndex == 0)
{
RuntimeModel.ExecuteInitialStep();
}
else
{
RuntimeModel.ExecuteStep();
}
RuntimeModel.NotifyFaultActivations();
}
/// <summary>
/// Adds a transition to the <paramref name="model" />'s current state.
/// </summary>
/// <param name="model">The model the transition should be added for.</param>
public void Add(RuntimeModel model)
{
if (_count >= _capacity)
throw new OutOfMemoryException("Unable to store an additional transition. Try increasing the successor state capacity.");
++_computedCount;
// 1. Serialize the model's computed state; that is the successor state of the transition's source state
// modulo any changes resulting from notifications of fault activations
var successorState = _targetStateMemory + _stateVectorSize * _count;
var activatedFaults = FaultSet.FromActivatedFaults(model.NondeterministicFaults);
model.Serialize(successorState);
// 2. Make sure the transition we're about to add is activation-minimal
if (!Add(successorState, activatedFaults))
return;
// 3. Execute fault activation notifications and serialize the updated state if necessary
if (model.NotifyFaultActivations())
model.Serialize(successorState);
// 4. Store the transition
_transitions[_count] = new CandidateTransition
{
TargetState = successorState,
Formulas = new StateFormulaSet(_formulas),
ActivatedFaults = activatedFaults,
IsValid = true,
};
++_count;
}
