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toparity: false transitions are not a problem anymore

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* spot/twaalgos/toparity.cc: Do not remove false transitions.
* tests/python/toparity.py: Add a test case with false transitions.
This commit is contained in:
Alexandre Duret-Lutz 2020-04-16 10:54:10 +02:00
parent 1e86463205
commit 875846f51f
2 changed files with 21 additions and 28 deletions
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25
spot/twaalgos/toparity.cc
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@ -1657,7 +1657,7 @@ run()
unsigned initial_state = aut_->get_init_state_number();
auto initial_car_ptr = state2car.find(initial_state);
car_state initial_car;
// If we take an automaton with one state and without transition,
// If we take an automaton with one state and without transition,
// the SCC was useless so state2car doesn't have initial_state
if (initial_car_ptr == state2car.end())
{
@ -1703,34 +1703,13 @@ to_parity_options options;
std::vector<std::string>* names;
}; // car_generator
static const_twa_graph_ptr
remove_false_transitions(const const_twa_graph_ptr& a)
{
// Do not do anything if the automaton has no false transition
for (auto edge : a->edges())
if (edge.cond == bddfalse)
goto doremoval;
return a;
doremoval:
auto res_ = make_twa_graph(a->get_dict());
res_->copy_ap_of(a);
res_->new_states(a->num_states());
for (auto edge : a->edges())
if (edge.cond != bddfalse)
res_->new_edge(edge.src, edge.dst, edge.cond, edge.acc);
res_->set_init_state(a->get_init_state_number());
res_->set_acceptance(a->get_acceptance());
res_->prop_copy(a, twa::prop_set::all());
return res_;
}
}// namespace
twa_graph_ptr
to_parity(const const_twa_graph_ptr &aut, const to_parity_options options)
{
return car_generator(remove_false_transitions(aut), options).run();
return car_generator(aut, options).run();
}
// Old version of CAR.