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fix #1677

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-06-18 11:22:01 -07:00
parent 55ebf69648
commit c3b27903f8
3 changed files with 11 additions and 11 deletions
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6
src/ast/rewriter/seq_rewriter.cpp
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@ -1206,8 +1206,7 @@ bool seq_rewriter::is_sequence(expr* e, expr_ref_vector& seq) {
e = todo.back();
todo.pop_back();
if (m_util.str.is_string(e, s)) {
for (unsigned i = s.length(); i > 0; ) {
--i;
for (unsigned i = 0; i < s.length(); ++i) {
seq.push_back(m_util.str.mk_char(s, i));
}
}
@ -1218,14 +1217,13 @@ bool seq_rewriter::is_sequence(expr* e, expr_ref_vector& seq) {
seq.push_back(e1);
}
else if (m_util.str.is_concat(e, e1, e2)) {
todo.push_back(e1);
todo.push_back(e2);
todo.push_back(e1);
}
else {
return false;
}
}
seq.reverse();
return true;
}