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bug-fixes to sequence theory

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-19 13:57:47 +01:00
parent c9373ebc9f
commit cccd502a4d
4 changed files with 87 additions and 41 deletions
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5
src/ast/rewriter/seq_rewriter.cpp
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@ -374,7 +374,7 @@ br_status seq_rewriter::mk_seq_length(expr* a, expr_ref& result) {
es.push_back(m_autil.mk_numeral(rational(len, rational::ui64()), true));
}
result = m_autil.mk_add(es.size(), es.c_ptr());
return BR_DONE;
return BR_REWRITE2;
}
return BR_FAILED;
}
@ -1170,14 +1170,13 @@ bool seq_rewriter::reduce_eq(expr_ref_vector& ls, expr_ref_vector& rs, expr_ref_
rs.pop_back();
}
else {
expr_ref s2(m_util.str.mk_string(s.extract(0, s.length()-2)), m());
expr_ref s2(m_util.str.mk_string(s.extract(0, s.length()-1)), m());
rs[rs.size()-1] = s2;
}
}
else {
break;
}
TRACE("seq", tout << "change back\n";);
change = true;
lchange = true;
}