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tl: first_match does not preserve syntactic_si

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* spot/tl/formula.cc: Fix it.
* tests/core/kind.test: Add test case.
This commit is contained in:
Alexandre Duret-Lutz 2019-05-06 21:52:05 +02:00
parent ef8de879dc
commit b7cd475632
2 changed files with 5 additions and 3 deletions
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spot/tl/formula.cc
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@ -1632,10 +1632,10 @@ namespace spot
break;
case op::first_match:
props = children[0]->props;
// If first_match(r) == r && !(r;[*]), then it should follow
// that if r is stutter-inv, then first_match(r) is
// stutter-inv, so we do not reset the syntactic_si bit.
assert(is_.sere_formula);
// {(a[+];b*);c*}<>->d is stutter invariant
// {first_match(a[+];b*);c*}<>->d is NOT.
is_.syntactic_si = false;
is_.boolean = false;
is_.ltl_formula = false;
is_.psl_formula = false;