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fixing bugs in seq

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-23 10:38:49 -05:00
parent 993a0434b4
commit 924f03c6de
5 changed files with 173 additions and 154 deletions
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2
src/ast/rewriter/seq_rewriter.cpp
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@ -383,7 +383,7 @@ br_status seq_rewriter::mk_seq_extract(expr* a, expr* b, expr* c, expr_ref& resu
zstring s;
rational pos, len;
if (m_util.str.is_string(a, s) && m_autil.is_numeral(b, pos) && m_autil.is_numeral(c, len) &&
pos.is_unsigned() && len.is_unsigned() && pos.get_unsigned() <= s.length()) {
pos.is_unsigned() && len.is_unsigned() && pos.get_unsigned() + len.get_unsigned() <= s.length()) {
unsigned _pos = pos.get_unsigned();
unsigned _len = len.get_unsigned();
result = m_util.str.mk_string(s.extract(_pos, _len));