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remove_fin: never return acceptance "f"

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Fixes #333.

* spot/twaalgos/remfin.cc, spot/twaalgos/remfin.hh,
spot/twaalgos/totgba.cc: Adjust.  The assert() added
to remove_fin() triggered a lot of failure in the test
suite before the different functions were fixed.
* tests/core/remfin.test, tests/python/tra2tba.py:
Adjust expected result.
* NEWS: Mention the bug.
This commit is contained in:
Alexandre Duret-Lutz 2018-03-16 13:52:39 +01:00
parent f2b3653226
commit 1db3472a99
6 changed files with 64 additions and 14 deletions
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12
spot/twaalgos/totgba.cc
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@ -757,6 +757,18 @@ namespace spot
}
}
simplify_acceptance_here(out);
if (out->acc().is_f())
{
// "f" is not generalized-Büchi. Just return an
// empty automaton instead.
auto res = make_twa_graph(out->get_dict());
res->set_generalized_buchi(0);
res->set_init_state(res->new_state());
res->prop_stutter_invariant(true);
res->prop_weak(true);
res->prop_complete(false);
return res;
}
return out;
}