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some fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-17 07:33:43 -07:00
parent 501aa7927d
commit a83f72b657
6 changed files with 30 additions and 16 deletions
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2
src/ast/rewriter/seq_rewriter.cpp
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@ -1146,7 +1146,7 @@ br_status seq_rewriter::mk_seq_nth(expr* a, expr* b, expr_ref& result) {
expr* es[2] = { a, b};
expr* la = m_util.str.mk_length(a);
result = m().mk_ite(m().mk_and(m_autil.mk_ge(b, m_autil.mk_int(0)), m().mk_not(m_autil.mk_ge(b, la))),
result = m().mk_ite(m().mk_and(m_autil.mk_ge(b, m_autil.mk_int(0)), m().mk_not(m_autil.mk_le(la, b))),
m().mk_app(m_util.get_family_id(), OP_SEQ_NTH_I, 2, es),
m().mk_app(m_util.get_family_id(), OP_SEQ_NTH_U, 2, es));
return BR_REWRITE_FULL;