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fix #4076

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-04-23 21:34:20 -07:00
parent cc8cd2cc2f
commit 04fec3f6a0
1 changed files with 1 additions and 0 deletions
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src/ast/rewriter/seq_rewriter.cpp
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@ -1286,6 +1286,7 @@ br_status seq_rewriter::mk_seq_index(expr* a, expr* b, expr* c, expr_ref& result
if (i > 0) { if (i > 0) {
result = m_util.str.mk_index( result = m_util.str.mk_index(
m_util.str.mk_concat(as.size() - i, as.c_ptr() + i, sort_a), b, c); m_util.str.mk_concat(as.size() - i, as.c_ptr() + i, sort_a), b, c);
result = m().mk_ite(m_autil.mk_ge(result, zero()), m_autil.mk_add(m_autil.mk_int(i), result), minus_one());
return BR_REWRITE1; return BR_REWRITE1;
} }