/**
* Generate a DRA for an LTL formula using scheck
* @param ltl the formula
* @param scheck_path the path to the scheck executable
* @return a shared_ptr to the generated DRA (on failure returns a ptr to 0)
*/
//template <class DRA>
//typename DRA::shared_ptr
public DRA ltl2dra(LTLFormula ltl, BuchiAutomata buchiAutomata)
{
LTLFormula ltl_;
LTLFormula ltl_for_scheck = null;
bool safe = false;
if (ltl.isSafe())
{
safe = true;
ltl_ = ltl.negate();
ltl_for_scheck = ltl_;
}
else if (ltl.isCoSafe())
{
ltl_for_scheck = ltl;
}
else
{
if (_only_syn)
{
// Not syntactically safe -> abort
//typename
//DRA::shared_ptr p;
//return p;
return(null);
}
}
// std::cerr<< "Calling scheck with "
// <<ltl_for_scheck->toStringPrefix() << " : " << safe << std::endl;
//NBA nba = ltl2dba(ltl_for_scheck, buchiAutomata); //, scheck_path, _only_syn
NBA nba = LTL2NBA.ltl2nba(ltl_for_scheck, buchiAutomata); //, scheck_path, _only_syn
if (nba == null)
{
//typename
//DRA::shared_ptr p;
//return p;
return(null);
}
// nba->print(std::cerr);
// safe -> negate DRA
return(DBA2DRA.dba2dra(nba, safe));
// return dba2dra<DRA>(*nba, safe);
// nba is auto-destructed
//<NBA_t,DRA>
}
public void convert(NBA nba, DRA dra_result, int limit) //=0
{
if (nba.size() == 0 || nba.getStartState() == null)
{
// the NBA is empty -> construct DRA that is empty
dra_result.constructEmpty();
return;
}
if (_options.dba_check && nba.isDeterministic())
{
DBA2DRA.dba2dra(nba, dra_result);
return;
}
if (_options.stutter_closure)
{
if (_stutter_information != null && !_stutter_information.isCompletelyInsensitive())
{
//std::cerr <<
//"WARNING: NBA might not be 100% stutter insensitive, applying stutter closure can create invalid results!" <<
//std::endl;
}
NBA nba_closed = NBAStutterClosure.stutter_closure(nba);
if (can_stutter())
{
convert_safra_stuttered(nba_closed, dra_result, limit);
return;
}
convert_safra(nba_closed, dra_result, limit);
return;
}
if (can_stutter())
{
convert_safra_stuttered(nba, dra_result, limit);
return;
}
convert_safra(nba, dra_result, limit);
return;
}