/// <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>
/// Deserializes the state at the <paramref name="position" /> of the counter example.
/// </summary>
/// <param name="position">The position of the state within the counter example that should be deserialized.</param>
public unsafe ExecutableModel <TExecutableModel> DeserializeState(int position)
{
Requires.That(States != null, "No counter example has been loaded.");
Requires.InRange(position, nameof(position), 0, StepCount);
using (var pointer = PinnedPointer.Create(GetState(position)))
RuntimeModel.Deserialize((byte *)pointer);
return(RuntimeModel);
}
/// <summary>
/// Gets all transitions towards successor states of <paramref name="state" />.
/// </summary>
/// <param name="state">The state the successors should be returned for.</param>
public override TransitionCollection GetSuccessorTransitions(byte *state)
{
BeginExecution();
ChoiceResolver.PrepareNextState();
while (ChoiceResolver.PrepareNextPath())
{
RuntimeModel.Deserialize(state);
ExecuteTransition();
GenerateTransition();
}
return(EndExecution());
}
/// <summary>
/// Gets all initial transitions of the model.
/// </summary>
public override TransitionCollection GetInitialTransitions()
{
BeginExecution();
ChoiceResolver.PrepareNextState();
fixed(byte *state = RuntimeModel.ConstructionState)
{
while (ChoiceResolver.PrepareNextPath())
{
RuntimeModel.Deserialize(state);
ExecuteInitialTransition();
GenerateTransition();
}
}
return(EndExecution());
}
/// <summary>
/// Restores a previously discovered state.
/// </summary>
private void RestoreState(int stateNumber)
{
fixed(byte *state = _states[stateNumber])
_runtimeModel.Deserialize(state);
}
