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fix #4876

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This commit is contained in:
Nikolaj Bjorner 2020-12-08 12:12:16 -08:00
parent 8ce08d57a0
commit 97683bd48a
1 changed files with 3 additions and 2 deletions
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5
src/ast/rewriter/seq_rewriter.cpp
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@ -1712,8 +1712,9 @@ br_status seq_rewriter::mk_seq_replace_all(expr* a, expr* b, expr* c, expr_ref&
return BR_DONE; return BR_DONE;
} }
expr_ref_vector strs(m()); expr_ref_vector strs(m());
for (unsigned i = 0; i < s1.length() - s2.length(); ++i) { for (unsigned i = 0; i < s1.length(); ++i) {
if (s2 == s1.extract(0, s2.length()-1)) { if (s1.length() >= s2.length() + i &&
s2 == s1.extract(i, s2.length())) {
strs.push_back(c); strs.push_back(c);
i += s2.length(); i += s2.length();
} }