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fix bugs exposed by unit tests from Pierre

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-26 09:50:14 -08:00
parent 8e378062e2
commit 6529d43fb1
3 changed files with 11 additions and 2 deletions
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5
src/ast/rewriter/seq_rewriter.cpp
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@ -36,6 +36,7 @@ expr_ref sym_expr::accept(expr* e) {
break;
}
case t_char:
SASSERT(m.get_sort(e) == m.get_sort(m_t));
result = m.mk_eq(e, m_t);
break;
case t_range: {
@ -792,8 +793,8 @@ bool seq_rewriter::is_sequence(expr* e, expr_ref_vector& seq) {
else if (m_util.str.is_empty(e)) {
continue;
}
else if (m_util.str.is_unit(e)) {
seq.push_back(e);
else if (m_util.str.is_unit(e, e1)) {
seq.push_back(e1);
}
else if (m_util.str.is_concat(e, e1, e2)) {
todo.push_back(e1);