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sbacc: more fixes related to #312

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The issue also exists with determinism.

* tests/core/sbacc.test: New test case.
* spot/twaalgos/sbacc.cc: Fix it.
* NEWS: Update.
This commit is contained in:
Alexandre Duret-Lutz 2017-12-24 19:07:24 +01:00
parent 5467fa1622
commit ec393708bb
3 changed files with 25 additions and 8 deletions
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13
spot/twaalgos/sbacc.cc
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@ -169,14 +169,17 @@ namespace spot
}
res->merge_edges();
// If the automaton was marked as not complete, and we have
// ignored some unreachable state, then it is possible that the
// result becomes complete.
if (res->prop_complete().is_false())
// If the automaton was marked as not complete or not universal,
// and we have ignored some unreachable state, then it is possible
// that the result becomes complete or universal.
if (res->prop_complete().is_false() || res->prop_universal().is_false())
for (unsigned i = 0; i < ns; ++i)
if (!si.reachable_state(i))
{
res->prop_complete(trival::maybe());
if (res->prop_complete().is_false())
res->prop_complete(trival::maybe());
if (res->prop_universal().is_false())
res->prop_universal(trival::maybe());
break;
}
return res;