//internal bool collapseExcludedIsomorphicStates;
//int initTransitions;
//CompoundTerm goal;
/// <summary>
/// Show all transitions from the given node and from the nodes that are reached from
/// the given node etc., until the state space is exhausted or the maximum number
/// of transitions is reached.
/// </summary>
public ReachabilityResult CheckReachability()
{
uint transCnt = 0;
uint stateCount = 0;
//(firstExploration ? (initTransitions < 0 ? maxTransitions : initTransitions) : maxTransitions);
//firstExploration = false;
//excludeIsomorphicStates = false;
if (excludeIsomorphicStates)
{
Set <IState> frontier = new Set <IState>(modelProgram.InitialState);
//stateCount++;
//Set<IState> visited = Set<IState>.EmptySet;
StateContainer <IState> visited = new StateContainer <IState>(this.modelProgram, modelProgram.InitialState);
stateCount++;
// need to add a check about the initial state.
Set <string> transitionPropertyNames = Set <string> .EmptySet;
TransitionProperties transitionProperties;
while (!frontier.IsEmpty)
{
IState sourceIState = frontier.Choose(0);
frontier = frontier.Remove(sourceIState);
foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
{
foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
{
//Node targetNode = GetTargetNode(sourceNode, action);
IState targetIState = modelProgram.GetTargetState(sourceIState, action, transitionPropertyNames, out transitionProperties);
//if (this.modelProgram.IsAccepting(targetIState))
// this.acceptingNodes = this.acceptingNodes.Add(targetNode);
//if (!this.modelProgram.SatisfiesStateInvariant(targetState))
// this.errorNodes = this.errorNodes.Add(targetNode);
//IState isomorphicState;
//Transition t;
transCnt++;
IState isomorphicState;
if (!visited.HasIsomorphic(targetIState, out isomorphicState))
{
frontier = frontier.Add(targetIState);
visited.Add(targetIState);
stateCount++;
//visited.Add(targetIState);
//t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
}
//else
//{
// //if (collapseExcludedIsomorphicStates)
// // t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// //else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
//}
//this.transitions = this.transitions.Add(t);
//this.hiddenTransitions = this.hiddenTransitions.Remove(t);
}
}
}
//Set<IState> frontier = new Set<IState>(stateMap[node]);
//StateContainer<IState> visited = new StateContainer<IState>(this.modelProgram, stateMap[node]);
//while (!frontier.IsEmpty && this.transitions.Count < transCnt)
//{
// IState sourceIState = frontier.Choose(0);
// Node sourceNode = nodeMap[sourceIState];
// frontier = frontier.Remove(sourceIState);
// foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
// {
// foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
// {
// Node targetNode = GetTargetNode(sourceNode, action);
// IState targetIState = stateMap[targetNode];
// IState isomorphicState;
// Transition t;
// if (!visited.HasIsomorphic(targetIState, out isomorphicState))
// {
// frontier = frontier.Add(targetIState);
// //visited = visited.Add(targetIState);
// visited.Add(targetIState);
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// }
// else
// {
// if (collapseExcludedIsomorphicStates)
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
// }
// this.transitions = this.transitions.Add(t);
// this.hiddenTransitions = this.hiddenTransitions.Remove(t);
// }
// }
//}
////Console.WriteLine(dashedTransitions.ToString());
////Console.WriteLine(visited.ToString());
}
else
{
Set <IState> frontier = new Set <IState>(modelProgram.InitialState);
stateCount++;
// need to add a check about the initial state.
Set <IState> visited = new Set <IState>(modelProgram.InitialState);
Set <string> transitionPropertyNames = Set <string> .EmptySet;
TransitionProperties transitionProperties;
while (!frontier.IsEmpty)
{
IState sourceIState = frontier.Choose(0);
frontier = frontier.Remove(sourceIState);
foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
{
foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
{
//Node targetNode = GetTargetNode(sourceNode, action);
IState targetIState = modelProgram.GetTargetState(sourceIState, action, transitionPropertyNames, out transitionProperties);
//Console.WriteLine(sourceIState.ToString());
//Console.WriteLine ("--- " + action + " --->");
//Console.WriteLine (targetIState.ToString());
//Console.WriteLine();
//Console.WriteLine();
//if (this.modelProgram.IsAccepting(targetIState))
// this.acceptingNodes = this.acceptingNodes.Add(targetNode);
//if (!this.modelProgram.SatisfiesStateInvariant(targetState))
// this.errorNodes = this.errorNodes.Add(targetNode);
//IState isomorphicState;
//Transition t;
transCnt++;
if (!visited.Contains(targetIState))
{
frontier = frontier.Add(targetIState);
visited = visited.Add(targetIState);
stateCount++;
//visited.Add(targetIState);
//t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
}
//else
//{
// //if (collapseExcludedIsomorphicStates)
// // t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// //else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
//}
//this.transitions = this.transitions.Add(t);
//this.hiddenTransitions = this.hiddenTransitions.Remove(t);
}
}
}
}
//Console.WriteLine("Checker results");
//Console.WriteLine("Reached states: "+stateCount);
//Console.WriteLine("Number of transitions: "+transCnt);
ReachabilityResult result = new ReachabilityResult(stateCount, transCnt);
return(result);
}
/// <summary>
/// Check if the term represented by goal is reachable. Empty string results in traversing the whole state space.
/// </summary>
/// <param name="goal">The goal term involving the model program name as outer function symbol.</param>
public ReachabilityResult CheckReachability(string goal)
{
uint transCnt = 0;
uint stateCount = 0;
//(firstExploration ? (initTransitions < 0 ? maxTransitions : initTransitions) : maxTransitions);
//firstExploration = false;
//excludeIsomorphicStates = false;
Set<CompoundTerm> goals = processGoal(modelProgram, goal);
Pair<Set<CompoundTerm>, Set<Term>> simpleAndFsmGoals = splitGoals(goals);
if (GoalsSatisfied(simpleAndFsmGoals, modelProgram.InitialState)) goto end;
if (excludeIsomorphicStates)
{
Set<IState> frontier = new Set<IState>(modelProgram.InitialState);
//stateCount++;
//Set<IState> visited = Set<IState>.EmptySet;
StateContainer<IState> visited = new StateContainer<IState>(this.modelProgram, modelProgram.InitialState);
stateCount++;
// need to add a check about the initial state.
Set<string> transitionPropertyNames = Set<string>.EmptySet;
TransitionProperties transitionProperties;
while (!frontier.IsEmpty)
{
IState sourceIState = frontier.Choose(0);
frontier = frontier.Remove(sourceIState);
foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
{
foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
{
//Node targetNode = GetTargetNode(sourceNode, action);
IState targetIState = modelProgram.GetTargetState(sourceIState, action, transitionPropertyNames, out transitionProperties);
//if (this.modelProgram.IsAccepting(targetIState))
// this.acceptingNodes = this.acceptingNodes.Add(targetNode);
//if (!this.modelProgram.SatisfiesStateInvariant(targetState))
// this.errorNodes = this.errorNodes.Add(targetNode);
//IState isomorphicState;
//Transition t;
transCnt++;
IState isomorphicState;
if (!visited.HasIsomorphic(targetIState, out isomorphicState))
{
if (GoalsSatisfied(simpleAndFsmGoals, targetIState)) goto end;
frontier = frontier.Add(targetIState);
visited.Add(targetIState);
stateCount++;
//visited.Add(targetIState);
//t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
}
//else
//{
// //if (collapseExcludedIsomorphicStates)
// // t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// //else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
//}
//this.transitions = this.transitions.Add(t);
//this.hiddenTransitions = this.hiddenTransitions.Remove(t);
}
}
}
//Set<IState> frontier = new Set<IState>(stateMap[node]);
//StateContainer<IState> visited = new StateContainer<IState>(this.modelProgram, stateMap[node]);
//while (!frontier.IsEmpty && this.transitions.Count < transCnt)
//{
// IState sourceIState = frontier.Choose(0);
// Node sourceNode = nodeMap[sourceIState];
// frontier = frontier.Remove(sourceIState);
// foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
// {
// foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
// {
// Node targetNode = GetTargetNode(sourceNode, action);
// IState targetIState = stateMap[targetNode];
// IState isomorphicState;
// Transition t;
// if (!visited.HasIsomorphic(targetIState, out isomorphicState))
// {
// frontier = frontier.Add(targetIState);
// //visited = visited.Add(targetIState);
// visited.Add(targetIState);
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// }
// else
// {
// if (collapseExcludedIsomorphicStates)
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
// }
// this.transitions = this.transitions.Add(t);
// this.hiddenTransitions = this.hiddenTransitions.Remove(t);
// }
// }
//}
////Console.WriteLine(dashedTransitions.ToString());
////Console.WriteLine(visited.ToString());
}
else
{
Set<IState> frontier = new Set<IState>(modelProgram.InitialState);
Console.Out.WriteLine(frontier.ToString());
Console.Out.WriteLine(modelProgram.ToString());
stateCount++;
// need to add a check about the initial state.
Set<IState> visited = new Set<IState>(modelProgram.InitialState);
Set<string> transitionPropertyNames = Set<string>.EmptySet;
TransitionProperties transitionProperties;
while (!frontier.IsEmpty)
{
IState sourceIState = frontier.Choose(0);
frontier = frontier.Remove(sourceIState);
foreach (Symbol aSymbol in this.modelProgram.PotentiallyEnabledActionSymbols(sourceIState))
{
foreach (CompoundTerm action in this.modelProgram.GetActions(sourceIState, aSymbol))
{
//Node targetNode = GetTargetNode(sourceNode, action);
IState targetIState = modelProgram.GetTargetState(sourceIState, action, transitionPropertyNames, out transitionProperties);
//Console.WriteLine(sourceIState.ToString());
//Console.WriteLine ("--- " + action + " --->");
//Console.WriteLine (targetIState.ToString());
//Console.WriteLine();
//Console.WriteLine();
//if (this.modelProgram.IsAccepting(targetIState))
// this.acceptingNodes = this.acceptingNodes.Add(targetNode);
//if (!this.modelProgram.SatisfiesStateInvariant(targetState))
// this.errorNodes = this.errorNodes.Add(targetNode);
//IState isomorphicState;
//Transition t;
transCnt++;
if (!visited.Contains(targetIState))
{
if (GoalsSatisfied(simpleAndFsmGoals, targetIState)) goto end;
frontier = frontier.Add(targetIState);
visited = visited.Add(targetIState);
stateCount++;
//visited.Add(targetIState);
//t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
}
//else
//{
// //if (collapseExcludedIsomorphicStates)
// // t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, nodeMap[isomorphicState]);
// //else
// {
// Term isoNode = nodeMap[isomorphicState];
// t = new Triple<Term, CompoundTerm, Term>(sourceNode, action, targetNode);
// if (!targetNode.Equals(sourceNode) && !targetNode.Equals(isoNode))
// groupingTransitions = groupingTransitions.Add(new Triple<Term, CompoundTerm, Term>(targetNode, new CompoundTerm(new Symbol("IsomorphicTo"), new Sequence<Term>()), isoNode));
// }
//}
//this.transitions = this.transitions.Add(t);
//this.hiddenTransitions = this.hiddenTransitions.Remove(t);
}
}
}
}
//Console.WriteLine("Checker results");
//Console.WriteLine("Reached states: "+stateCount);
//Console.WriteLine("Number of transitions: "+transCnt);
ReachabilityResult result = new ReachabilityResult(stateCount, transCnt);
return result;
end:
ReachabilityResult resReached = new ReachabilityResult(stateCount, transCnt);
resReached.Goal = goal;
resReached.GoalReached = true;
return resReached;
}
public static void RunWithCommandLineArguments(string[] args)
{
MCCmdLineParams settings = new MCCmdLineParams();
if (!Parser.ParseArgumentsWithUsage(args, settings))
{
return;
}
#region load the libraries
List <Assembly> libs = new List <Assembly>();
try
{
if (settings.reference != null)
{
foreach (string l in settings.reference)
{
libs.Add(System.Reflection.Assembly.LoadFrom(l));
}
}
}
catch (Exception e)
{
throw new ModelProgramUserException(e.Message);
}
#endregion
#region load the test cases if any
CompoundTerm goal = null;
if (!String.IsNullOrEmpty(settings.goal))
{
try
{
System.IO.StreamReader goalReader =
new System.IO.StreamReader(settings.goal);
string goalAsString = goalReader.ReadToEnd();
goalReader.Close();
goal = CompoundTerm.Parse(goalAsString);
}
catch (Exception e)
{
throw new ModelProgramUserException("Cannot create goal: " + e.Message);
}
}
else
{
Console.WriteLine("No goal was specified, counting distinct states and transitions.");
Console.WriteLine("Invalid end states check currently not enabled.");
}
#endregion
#region create a model program for each model using the factory method and compose into product
string mpMethodName;
string mpClassName;
ModelProgram mp = null;
if (settings.model != null && settings.model.Length > 0)
{
if (libs.Count == 0)
{
throw new ModelProgramUserException("No reference was provided to load models from.");
}
ReflectionHelper.SplitFullMethodName(settings.model[0], out mpClassName, out mpMethodName);
Type mpType = ReflectionHelper.FindType(libs, mpClassName);
MethodInfo mpMethod = ReflectionHelper.FindMethod(mpType, mpMethodName, Type.EmptyTypes, typeof(ModelProgram));
try
{
mp = (ModelProgram)mpMethod.Invoke(null, null);
}
catch (Exception e)
{
throw new ModelProgramUserException("Invocation of '" + settings.model[0] + "' failed: " + e.ToString());
}
for (int i = 1; i < settings.model.Length; i++)
{
ReflectionHelper.SplitFullMethodName(settings.model[i], out mpClassName, out mpMethodName);
mpType = ReflectionHelper.FindType(libs, mpClassName);
mpMethod = ReflectionHelper.FindMethod(mpType, mpMethodName, Type.EmptyTypes, typeof(ModelProgram));
ModelProgram mp2 = null;
try
{
mp2 = (ModelProgram)mpMethod.Invoke(null, null);
}
catch (Exception e)
{
throw new ModelProgramUserException("Invocation of '" + settings.model[i] + "' failed: " + e.ToString());
}
mp = new ProductModelProgram(mp, mp2);
}
}
#endregion
if (mp == null)
{
Console.WriteLine("ModelProgram was null");
Console.WriteLine("Tried to instantiate:");
if (settings.model != null)
{
foreach (string s in settings.model)
{
Console.WriteLine(s);
}
}
return;
}
Reachability mc = new Reachability();
mc.excludeIsomorphicStates = settings.excludeIsomorphic;
mc.modelProgram = mp;
DateTime before = DateTime.Now;
ReachabilityResult result = mc.CheckReachability();
DateTime after = DateTime.Now;
Console.WriteLine("Results of reachability checking:");
Console.WriteLine();
Console.WriteLine(" States reached: " + result.StateCount);
Console.WriteLine(" Transitions covered: " + result.TransitionCount);
}