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fix axiomatization of str.replace. Fixes issue #703

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-08-20 06:13:52 -07:00
parent 2d8325ed43
commit 879f792125
2 changed files with 7 additions and 2 deletions
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3
src/ast/seq_decl_plugin.cpp
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@ -144,6 +144,9 @@ zstring zstring::replace(zstring const& src, zstring const& dst) const {
if (length() < src.length()) {
return zstring(*this);
}
if (src.length() == 0) {
return zstring(*this);
}
bool found = false;
for (unsigned i = 0; i < length(); ++i) {
bool eq = !found && i + src.length() <= length();