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remove symbol -> zstring -> symbol round-trips

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-05-22 13:12:49 -07:00
parent 5cb0bac41d
commit 20a67e47ca
13 changed files with 68 additions and 62 deletions
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2
src/ast/rewriter/seq_axioms.cpp
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@ -682,7 +682,7 @@ namespace seq {
// itos(n) does not start with "0" when n > 0
// n = 0 or at(itos(n),0) != "0"
// alternative: n >= 0 => itos(stoi(itos(n))) = itos(n)
expr_ref zs(seq.str.mk_string(symbol("0")), m);
expr_ref zs(seq.str.mk_string("0"), m);
m_rewrite(zs);
expr_ref eq0 = mk_eq(n, zero);
expr_ref at0 = mk_eq(seq.str.mk_at(e, zero), zs);