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fix for #1015

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-05-10 19:40:00 -07:00
parent f03f471f02
commit d1cfc53495
3 changed files with 36 additions and 1 deletions
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30
src/ast/seq_decl_plugin.cpp
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@ -876,6 +876,36 @@ bool seq_decl_plugin::is_value(app* e) const {
}
}
bool seq_decl_plugin::are_equal(app* a, app* b) const {
if (a == b) return true;
// handle concatenations
return false;
}
bool seq_decl_plugin::are_distinct(app* a, app* b) const {
if (a == b) {
return false;
}
if (is_app_of(a, m_family_id, OP_STRING_CONST) &&
is_app_of(b, m_family_id, OP_STRING_CONST)) {
return true;
}
if (is_app_of(a, m_family_id, OP_SEQ_UNIT) &&
is_app_of(b, m_family_id, OP_SEQ_UNIT)) {
return true;
}
if (is_app_of(a, m_family_id, OP_SEQ_EMPTY) &&
is_app_of(b, m_family_id, OP_SEQ_UNIT)) {
return true;
}
if (is_app_of(b, m_family_id, OP_SEQ_EMPTY) &&
is_app_of(a, m_family_id, OP_SEQ_UNIT)) {
return true;
}
return false;
}
expr* seq_decl_plugin::get_some_value(sort* s) {
seq_util util(*m_manager);
if (util.is_seq(s)) {