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remove_fin: fix incorrect state-based output

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* spot/twaalgos/remfin.cc: If no Inf set is used, set sbacc early so
that it is used in the algorithm.
* tests/core/remfin.test: Add more tests.
* NEWS: Mention the bug.
This commit is contained in:
Alexandre Duret-Lutz 2017-08-09 17:43:01 +02:00
parent 30a68d288b
commit df04c715cf
3 changed files with 204 additions and 5 deletions
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11
spot/twaalgos/remfin.cc
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@ -27,7 +27,7 @@
#include <spot/twaalgos/alternation.hh>
#include "spot/priv/enumflags.hh"
//#define TRACE
// #define TRACE
#ifdef TRACE
#define trace std::cerr
#else
@ -672,7 +672,11 @@ namespace spot
res->set_acceptance(aut->num_sets() + extra_sets, new_code);
res->set_init_state(aut->get_init_state_number());
bool sbacc = aut->prop_state_acc().is_true();
// If the input had no Inf, the output is a state-based automaton.
if (allinf == 0U)
res->prop_state_acc(true);
bool sbacc = res->prop_state_acc().is_true();
scc_info si(aut);
unsigned nscc = si.scc_count();
std::vector<unsigned> state_map(nst);
@ -749,9 +753,6 @@ namespace spot
}
}
// If the input had no Inf, the output is a state-based automaton.
if (allinf == 0U)
res->prop_state_acc(true);
res->purge_dead_states();
trace << "before cleanup: " << res->get_acceptance() << '\n';