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add support for the weak property

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This fixes #119.

* doc/org/tut21.org, doc/org/hoa.org, NEWS: Document it.
* src/twa/twa.hh: Support it in automata.
* src/twaalgos/hoa.cc, src/parseaut/parseaut.yy: Add I/O support.
* src/twaalgos/minimize.cc, src/twaalgos/totgba.cc: Set weak
automata on output.
* src/tests/complement.test, src/tests/parseaut.test,
src/tests/readsave.test, src/tests/remfin.test, src/tests/sccsimpl.test,
src/tests/wdba2.test, wrap/python/tests/automata-io.ipynb: Adjust.
This commit is contained in:
Alexandre Duret-Lutz 2015-11-06 18:31:05 +01:00
parent eecd201273
commit 654888718c
15 changed files with 62 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/twaalgos/hoa.cc
View file

@ -425,7 +425,9 @@ namespace spot
prop(" stutter-invariant");
if (aut->prop_stutter_sensitive())
prop(" stutter-sensitive");
if (aut->prop_inherently_weak())
if (aut->prop_weak())
prop(" weak");
if (aut->prop_inherently_weak() && (verbose || !aut->prop_weak()))
prop(" inherently-weak");
os << nl;

8
src/twaalgos/minimize.cc
View file

@ -482,7 +482,7 @@ namespace spot
auto res = minimize_dfa(det_a, final, non_final);
res->prop_copy(a, { false, false, false, true });
res->prop_deterministic(true);
res->prop_inherently_weak(true);
res->prop_weak(true);
res->prop_state_acc(true);
return res;
}
@ -583,7 +583,7 @@ namespace spot
auto res = minimize_dfa(det_a, final, non_final);
res->prop_copy(a, { false, false, false, true });
res->prop_deterministic(true);
res->prop_inherently_weak(true);
res->prop_weak(true);
return res;
}
@ -605,7 +605,7 @@ namespace spot
// If the input automaton was already weak and deterministic, the
// output is necessary correct.
if (aut_f->prop_inherently_weak() && aut_f->prop_deterministic())
if (aut_f->prop_weak() && aut_f->prop_deterministic())
return min_aut_f;
// if f is a syntactic obligation formula, the WDBA minimization
@ -654,7 +654,7 @@ namespace spot
if (product(min_aut_f, aut_neg_f)->is_empty())
{
// Complement the minimized WDBA.
assert(min_aut_f->prop_inherently_weak());
assert(min_aut_f->prop_weak());
auto neg_min_aut_f = remove_fin(dtwa_complement(min_aut_f));
if (product(aut_f, neg_min_aut_f)->is_empty())
// Finally, we are now sure that it was safe

2
src/twaalgos/totgba.cc
View file

@ -335,7 +335,7 @@ namespace spot
res = make_twa_graph(aut->get_dict());
res->set_init_state(res->new_state());
res->prop_state_acc(true);
res->prop_inherently_weak(true);
res->prop_weak(true);
res->prop_deterministic(true);
res->prop_stutter_invariant(true);
return res;