/// <summary>
/// Constructor.
/// </summary>
/// <param name="fingerprint">Fingerprint</param>
/// <param name="enabledMachines">Enabled machines</param>
/// <param name="monitorStatus">Monitor status</param>
internal State(Fingerprint fingerprint, HashSet<AbstractMachine> enabledMachines,
Dictionary<Monitor, MonitorStatus> monitorStatus)
{
this.Fingerprint = fingerprint;
this.EnabledMachines = enabledMachines;
this.MonitorStatus = monitorStatus;
}
/// <summary>
/// Checks liveness at a trace cycle.
/// </summary>
/// <param name="root">Cycle start</param>
/// <param name="stateMap">Map of states</param>
internal void CheckLivenessAtTraceCycle(Fingerprint root, Dictionary<TraceStep, State> stateMap)
{
var cycle = new Dictionary<TraceStep, State>();
do
{
var traceStep = this.Runtime.ProgramTrace.Pop();
var state = stateMap[traceStep];
cycle.Add(traceStep, state);
IO.Debug("<LivenessDebug> Cycle contains {0} with {1}.",
traceStep.Type, state.Fingerprint.ToString());
// The state can be safely removed, because the liveness detection
// algorithm currently removes cycles, so a specific state can only
// appear once in the trace.
stateMap.Remove(traceStep);
}
while (this.Runtime.ProgramTrace.Peek() != null && !stateMap[
this.Runtime.ProgramTrace.Peek()].Fingerprint.Equals(root));
if (!this.IsSchedulingFair(cycle))
{
IO.Debug("<LivenessDebug> Scheduling in cycle is unfair.");
return;
}
else if (!this.IsNondeterminismFair(cycle))
{
IO.Debug("<LivenessDebug> Nondeterminism in cycle is unfair.");
return;
}
IO.Debug("<LivenessDebug> Cycle execution is fair.");
var hotMonitors = this.GetHotMonitors(cycle);
foreach (var monitor in hotMonitors)
{
string message = IO.Format("Monitor '{0}' detected infinite execution that " +
"violates a liveness property.", monitor.GetType().Name);
this.Runtime.BugFinder.NotifyAssertionFailure(message, false);
}
if (this.Runtime.Configuration.DepthBound == 0 || hotMonitors.Count > 0)
{
this.Runtime.BugFinder.Stop();
}
}