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fix #2417

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-07-21 10:57:52 -07:00
parent a9a26e5f2e
commit aff4b3022a
1 changed files with 2 additions and 1 deletions
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3
src/ast/rewriter/seq_rewriter.cpp
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@ -731,6 +731,7 @@ br_status seq_rewriter::mk_seq_extract(expr* a, expr* b, expr* c, expr_ref& resu
t2 = m_autil.mk_add(t2, m_util.str.mk_length(rhs));
}
result = m_util.str.mk_substr(t1, t2, c);
TRACE("seq", tout << result << "\n";);
return BR_REWRITE2;
}
@ -798,7 +799,7 @@ bool seq_rewriter::get_lengths(expr* e, expr_ref_vector& lens, rational& pos) {
else {
return false;
}
return true;
return !pos.is_neg();
}
bool seq_rewriter::cannot_contain_suffix(expr* a, expr* b) {