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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-12-17 11:34:54 -08:00
parent 9c8800bdde
commit e1ffaa7faf
1 changed files with 3 additions and 4 deletions
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7
src/ast/rewriter/seq_rewriter.cpp
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@ -3368,9 +3368,8 @@ expr_ref seq_rewriter::mk_regex_inter_normalize(expr* r1, expr* r2) {
result = r2; result = r2;
else if (re().is_dot_plus(r2) && re().get_info(r1).min_length > 0) else if (re().is_dot_plus(r2) && re().get_info(r1).min_length > 0)
result = r1; result = r1;
else { else
result = merge_regex_sets(r1, r2, re().mk_empty(r1->get_sort()), test, compose); result = merge_regex_sets(r1, r2, re().mk_empty(r1->get_sort()), test, compose);
}
return result; return result;
} }
@ -3380,7 +3379,6 @@ expr_ref seq_rewriter::merge_regex_sets(expr* r1, expr* r2, expr* unit,
sort* seq_sort; sort* seq_sort;
expr_ref result(unit, m()); expr_ref result(unit, m());
expr_ref_vector prefix(m()); expr_ref_vector prefix(m());
expr* a, * ar1, * b, * br1;
VERIFY(m_util.is_re(r1, seq_sort)); VERIFY(m_util.is_re(r1, seq_sort));
SASSERT(m_util.is_re(r2)); SASSERT(m_util.is_re(r2));
SASSERT(r2->get_sort() == r1->get_sort()); SASSERT(r2->get_sort() == r1->get_sort());
@ -3414,6 +3412,7 @@ expr_ref seq_rewriter::merge_regex_sets(expr* r1, expr* r2, expr* unit,
if (are_complements(ar, br)) if (are_complements(ar, br))
return expr_ref(unit, m()); return expr_ref(unit, m());
expr* a, * ar1, * b, * br1;
if (test(br, b, br1) && !test(ar, a, ar1)) if (test(br, b, br1) && !test(ar, a, ar1))
std::swap(ar, br); std::swap(ar, br);