/**
* Convert an LTL formula to a DRA.
* @param ltl the LTL formula
* @param options which operators are allowed
* @return a shared_ptr to the DRA
*/
private DRA ltl2dra(LTLFormula ltl, BuchiAutomata buchiAutomata, LTL2DSTAR_Options options)
{
APSet ap_set = ltl.getAPSet();
LTLFormula ltl_pnf = ltl.toPNF();
if (options.allow_union && ltl_pnf.getRootNode().getType() == type_t.T_OR)
{
LTLFormula ltl_left = ltl_pnf.getSubFormula(ltl_pnf.getRootNode().getLeft());
LTLFormula ltl_right = ltl_pnf.getSubFormula(ltl_pnf.getRootNode().getRight());
LTL2DSTAR_Options rec_opt = options;
rec_opt.recursion();
DRA dra_left = ltl2dra(ltl_left, buchiAutomata, rec_opt);
DRA dra_right = ltl2dra(ltl_right, buchiAutomata, rec_opt);
return(DRA.calculateUnion(dra_left, dra_right, _safra_opt.union_trueloop) as DRA);
}
if (options.safety)
{
LTLSafetyAutomata lsa = new LTLSafetyAutomata();
DRA safety_dra = lsa.ltl2dra(ltl, buchiAutomata);
if (safety_dra != null)
{
return(safety_dra);
}
}
DRA dra = new DRA(ap_set);
NBA nba = LTL2NBA.ltl2nba(ltl_pnf, buchiAutomata);
if (nba == null)
{
throw new Exception("Couldn't create NBA from LTL formula");
}
NBA2DRA nba2dra = new NBA2DRA(_safra_opt);
nba2dra.convert(nba, dra);
if (options.optimizeAcceptance)
{
dra.optimizeAcceptanceCondition();
}
if (options.bisim)
{
DRAOptimizations dra_optimizer = new DRAOptimizations();
dra = dra_optimizer.optimizeBisimulation(dra);
}
return(dra);
}
/**
* Generate a DRA/DSA for the LTL formula
*/
public DRA calculate(LTLFormula ltl, BuchiAutomata ba, LTL2DSTAR_Options ltl_opt)
{
LTLFormula ltl_p = (ltl.toPNF());
//if (ltl_opt.verbose_scheduler) {
// std::cerr << ltl_p->toStringInfix() << std::endl;
//}
LTL2DSTAR_Tree_Start root = new LTL2DSTAR_Tree_Start(ltl_p, ba, ltl_opt, this);
//if (ltl_opt.verbose_scheduler) {
// root.printTree(std::cerr);
//}
root.calculate();
DRA result = root._automaton;
if (result != null)
{
result.setComment(root._comment); //+ getTimingInformation()
}
return(result);
}
/**
* Convert an LTL formula to a DRA.
* @param ltl the LTL formula
* @param options which operators are allowed
* @return a shared_ptr to the DRA
*/
private DRA ltl2dra(LTLFormula ltl, BuchiAutomata buchiAutomata, LTL2DSTAR_Options options)
{
APSet ap_set = ltl.getAPSet();
LTLFormula ltl_pnf = ltl.toPNF();
if (options.allow_union && ltl_pnf.getRootNode().getType() == type_t.T_OR)
{
LTLFormula ltl_left = ltl_pnf.getSubFormula(ltl_pnf.getRootNode().getLeft());
LTLFormula ltl_right = ltl_pnf.getSubFormula(ltl_pnf.getRootNode().getRight());
LTL2DSTAR_Options rec_opt = options;
rec_opt.recursion();
DRA dra_left = ltl2dra(ltl_left, buchiAutomata, rec_opt);
DRA dra_right = ltl2dra(ltl_right,buchiAutomata, rec_opt);
return DRA.calculateUnion(dra_left, dra_right, _safra_opt.union_trueloop) as DRA;
}
if (options.safety)
{
LTLSafetyAutomata lsa = new LTLSafetyAutomata();
DRA safety_dra = lsa.ltl2dra(ltl, buchiAutomata);
if (safety_dra != null)
{
return safety_dra;
}
}
DRA dra = new DRA(ap_set);
NBA nba = LTL2NBA.ltl2nba(ltl_pnf, buchiAutomata);
if (nba == null)
{
throw new Exception("Couldn't create NBA from LTL formula");
}
NBA2DRA nba2dra = new NBA2DRA(_safra_opt);
nba2dra.convert(nba, dra);
if (options.optimizeAcceptance)
{
dra.optimizeAcceptanceCondition();
}
if (options.bisim)
{
DRAOptimizations dra_optimizer = new DRAOptimizations();
dra = dra_optimizer.optimizeBisimulation(dra);
}
return dra;
}
/**
* Generate a DRA/DSA for the LTL formula
*/
public DRA calculate(LTLFormula ltl, BuchiAutomata ba, LTL2DSTAR_Options ltl_opt)
{
LTLFormula ltl_p = (ltl.toPNF());
//if (ltl_opt.verbose_scheduler) {
// std::cerr << ltl_p->toStringInfix() << std::endl;
//}
LTL2DSTAR_Tree_Start root = new LTL2DSTAR_Tree_Start(ltl_p, ba, ltl_opt, this);
//if (ltl_opt.verbose_scheduler) {
// root.printTree(std::cerr);
//}
root.calculate();
DRA result = root._automaton;
if (result != null)
{
result.setComment(root._comment); //+ getTimingInformation()
}
return result;
}
