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swap order in equality for emptiness check to deal with rewriter

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-22 13:03:55 -08:00
parent ec36a9c495
commit 7bc3b4e381
2 changed files with 3 additions and 3 deletions
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2
src/ast/seq_decl_plugin.cpp
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@ -988,7 +988,7 @@ void seq_util::str::get_concat_units(expr* e, expr_ref_vector& es) const {
}
app* seq_util::str::mk_is_empty(expr* s) const {
return m.mk_eq(mk_empty(get_sort(s)), s);
return m.mk_eq(s, mk_empty(get_sort(s)));
}