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fix #2031

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-12-09 08:21:48 +01:00
parent 2ca83d0095
commit 559f57470e
2 changed files with 6 additions and 7 deletions
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5
src/ast/rewriter/seq_rewriter.cpp
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@ -689,11 +689,10 @@ br_status seq_rewriter::mk_seq_extract(expr* a, expr* b, expr* c, expr_ref& resu
if (offset == 0) {
return BR_FAILED;
}
expr_ref len1(m()), pos1(m());
expr_ref pos1(m());
pos1 = m_autil.mk_sub(b, m_autil.mk_int(offset));
len1 = m_autil.mk_sub(c, m_autil.mk_int(offset));
result = m_util.str.mk_concat(as.size() - offset, as.c_ptr() + offset);
result = m_util.str.mk_substr(result, pos1, len1);
result = m_util.str.mk_substr(result, pos1, c);
return BR_REWRITE3;
}