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remfin: add is_buchi_realizable() method

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* NEWS: Update.
* spot/tl/hierarchy.cc: Replace rabin_to_buchi_maybe() with
is_buchi_realizable().
* spot/twaalgos/remfin.cc: Implement it.
* spot/twaalgos/remfin.hh: Declare it.
This commit is contained in:
Alexandre GBAGUIDI AISSE 2017-09-21 16:42:28 +01:00
parent 1b4002401a
commit ebe3a15dcc
4 changed files with 45 additions and 9 deletions
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32
spot/twaalgos/remfin.cc
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@ -220,7 +220,8 @@ namespace spot
auto filter_data = filter_data_t{aut, keep};
auto init = aut->edge_storage(*unknown.begin()).src;
scc_info si(aut, init, filter, &filter_data);
scc_info si(aut, init, filter, &filter_data,
scc_info_options::TRACK_STATES);
for (unsigned uscc = 0; uscc < si.scc_count(); ++uscc)
{
@ -274,8 +275,8 @@ namespace spot
std::vector<bool> keep(aut->edge_vector().size(), true);
for (unsigned scc = 0; scc < si.scc_count(); ++scc)
scc_is_tba_type[scc] = is_scc_tba_type(aut, si, scc, keep,
aut_pairs, final);
scc_is_tba_type[scc] = is_scc_tba_type(aut, si, scc, keep,
aut_pairs, final);
auto res = make_twa_graph(aut->get_dict());
res->copy_ap_of(aut);
@ -785,6 +786,31 @@ namespace spot
}
}
bool
rabin_is_buchi_realizable(const const_twa_graph_ptr& inaut)
{
auto aut = cleanup_acceptance(inaut);
std::vector<acc_cond::rs_pair> pairs;
if (!aut->acc().is_rabin_like(pairs))
return false;
auto aut_pairs = rs_pairs_view(pairs);
if (aut->get_acceptance().is_t())
return false;
// if is TBA type
scc_info si(aut, scc_info_options::TRACK_STATES);
std::vector<bool> final(aut->edge_vector().size(), false);
std::vector<bool> keep(aut->edge_vector().size(), true);
for (unsigned scc = 0; scc < si.scc_count(); ++scc)
if (!is_scc_tba_type(aut, si, scc, keep, aut_pairs, final))
return false;
return true;
}
twa_graph_ptr
rabin_to_buchi_maybe(const const_twa_graph_ptr& aut)
{