internal override Automaton <BDD> GetAutomatonBDD(SimpleList <Variable> variables, IBDDAlgebra alg, int nrOfLabelBits, bool singletonSetSemantics)
{
//the existential variable will shadow any previous occurrence with the same name
//because when looking up the index of var it will be the last occurrence
var varIndex = variables.Count + nrOfLabelBits;
var variablesExt = variables.Append(var);
var autPhi = phi.GetAutomatonBDD(variablesExt, alg, nrOfLabelBits, singletonSetSemantics);
Automaton <BDD> autEx;
if (this.IsFirstOrder)
{
if (singletonSetSemantics)
{
autEx = autPhi.Intersect(BasicAutomata.MkSingleton(varIndex, alg)).Minimize();
}
else
{
autEx = autPhi.Intersect(BasicAutomata.MkIsNonempty(varIndex, alg)).Minimize();
}
}
else
{
autEx = autPhi;
}
//Project away the the existential variable
var newMoves = new List <Move <BDD> >();
foreach (var move in autEx.GetMoves())
{
newMoves.Add(new Move <BDD>(move.SourceState, move.TargetState, alg.OmitBit(move.Label, varIndex)));
}
var aut = Automaton <BDD> .Create(alg, autEx.InitialState, autEx.GetFinalStates(), newMoves);
var res = aut.Determinize();
res = res.Minimize();
return(res);
}
internal override Automaton <BDD> GetAutomatonBDD(SimpleList <Variable> variables, IBDDAlgebra alg, int nrOfLabelBits)
{
//the existential variable will shadow any previous occurrence with the same name
//because when looking up the index of var it will be the last occurrence
var varIndex = variables.Count + nrOfLabelBits;
var variablesExt = variables.Append(var);
var autPhi = phi.GetAutomatonBDD(variablesExt, alg, nrOfLabelBits);
//Project away the the existential variable
var newMoves = new List <Move <BDD> >();
foreach (var move in autPhi.GetMoves())
{
newMoves.Add(new Move <BDD>(move.SourceState, move.TargetState, alg.OmitBit(move.Label, varIndex)));
}
var aut = Automaton <BDD> .Create(alg, autPhi.InitialState, autPhi.GetFinalStates(), newMoves);
var res = aut.Determinize(alg);
res = res.Minimize(alg);
return(res);
}