public SCC(FiniteAutomaton fa)
{
this.fa = fa;
foreach (FAState st in fa.states)
{
if (!v_index.ContainsKey(st.id))
{
tarjan(st);
}
}
}
////UPGRADE_ISSUE: The following fragment of code could not be parsed and was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1156'"
//public Set < FAState > getNext(String a)
////UPGRADE_ISSUE: The following fragment of code could not be parsed and was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1156'"
//public Set < FAState > getPre(String a)
public virtual void addNext(System.String a, FAState b, FiniteAutomaton auto)
{
if (!next.ContainsKey(a))
{
//UPGRADE_ISSUE: The following fragment of code could not be parsed and was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1156'"
HashSet<FAState> S = new HashSet<FAState>();
S.Add(b);
next.Add(a, S);
}
else
next[a].Add(b);
}
/**
* Simplify a finite automaton by merging simulation equivalent states
* @param fa: a finite automaton
* @param Sim: some simulation rel_specation over states in the spec automaton
*
* @return an equivalent finite automaton
*/
private FiniteAutomaton quotient(FiniteAutomaton fa, HashSet<Pair<FAState,FAState>> rel) {
FiniteAutomaton result=new FiniteAutomaton();
Dictionary<FAState,FAState> map=new Dictionary<FAState,FAState>();
Dictionary<FAState,FAState> reducedMap=new Dictionary<FAState,FAState>();
foreach (FAState state in fa.states)
{
map.Add(state, state);
foreach (FAState state2 in fa.states)
{
if(rel.Contains(new Pair<FAState,FAState>(state,state2)) &&
rel.Contains(new Pair<FAState,FAState>(state2,state))){
map.Add(state,state2);
}
}
}
FAState init=result.createState();
reducedMap.Add(map[fa.InitialState], init);
result.InitialState = init;
foreach (FAState state in fa.states)
{
if(!reducedMap.ContainsKey(map[state])){
reducedMap.Add(map[state], result.createState());
}
if(fa.F.Contains(state)){
result.F.Add(reducedMap[map[state]]);
}
foreach (KeyValuePair<string, HashSet<FAState>> sym_it in state.next)
{
String sym=sym_it.Key;
foreach (FAState to in sym_it.Value)
{
if(!reducedMap.ContainsKey(map[to])){
reducedMap.Add(map[to], result.createState());
}
result.addTransition(reducedMap[map[state]], reducedMap[map[to]], sym);
}
}
}
HashSet<Pair<FAState,FAState>> newrel_spec=new HashSet<Pair<FAState,FAState>>();
foreach (Pair<FAState, FAState> sim in rel)
{
newrel_spec.Add(new Pair<FAState,FAState>(reducedMap[map[sim.Left]],reducedMap[map[sim.Right]]));
}
rel.Clear();
rel = new HashSet<Pair<FAState,FAState>>(newrel_spec);
return result;
}
public InclusionOpt(FiniteAutomaton system, FiniteAutomaton spec){
this.spec=spec;
this.system=system;
}
public bool inclusionTest(){
this.computeSim();
if(quotient_var){
spec=quotient(spec, rel_spec);
system=quotient(system, rel_system);
}
//debug("Spec.:");
//debug(spec.ToString());
//debug("Sim="+showSim(rel_spec));
//debug("System:");
//debug(system.ToString());
//debug("Sim="+showSim(rel_system));
return included();
}
private bool lasso_finding_test(HashSet<Arc> g, HashSet<Arc> h, int init){
if(!Head.ContainsKey(g.ToString())){
HashSet<int> H=new HashSet<int>();
foreach (Arc arc_g in g)
{
if(arc_g.From==init){
H.Add(arc_g.To);
}
}
Head.Add(g.ToString(), H);
}
if(!Tail.ContainsKey(h.ToString())){
FiniteAutomaton fa=new FiniteAutomaton();
OneToOneTreeMap<int,FAState> st=new OneToOneTreeMap<int,FAState>();
foreach (Arc arc_h in h)
{
if(!st.containsKey(arc_h.From))
st.put(arc_h.From, fa.createState());
if(!st.containsKey(arc_h.To))
st.put(arc_h.To, fa.createState());
fa.addTransition(st.getValue(arc_h.From), st.getValue(arc_h.To), arc_h.Label?"1":"0");
}
SCC s=new SCC(fa);
HashSet<int> T=new HashSet<int>();
foreach (FAState state in s.getResult())
{
T.Add(st.getKey(state));
}
int TailSize=0;
HashSet<Arc> isolatedArcs=h;
while(TailSize!=T.Count){
TailSize = T.Count;
HashSet<Arc> isolatedArcsTemp=new HashSet<Arc>();
foreach (Arc arc in isolatedArcs)
{
if(!T.Contains(arc.To)){
isolatedArcsTemp.Add(arc);
}else{
T.Add(arc.From);
}
}
isolatedArcs=isolatedArcsTemp;
}
Tail.Add(h.ToString(), T);
}
HashSet<int> intersection = new HashSet<int>(Head[g.ToString()]);
//intersection.retainAll(Tail[h.ToString()]);
intersection.IntersectWith(Tail[h.ToString()]);
//if(debug){
// if(intersection.isEmpty()){
// //debug("g_graph:"+g+", Head: "+Head.get(g.ToString()));
// //debug("h_graph:"+h+", Tail: "+Tail.get(h.ToString()));
// }
//}
return intersection.Count > 0;
}