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fix ordering for value propagation to ensure values are preferred

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-31 07:33:38 -07:00
parent 009e94d188
commit 62f8cc1289
1 changed files with 7 additions and 1 deletions
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8
src/smt/asserted_formulas.cpp
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@ -514,9 +514,15 @@ bool asserted_formulas::is_gt(expr* lhs, expr* rhs) {
if (lhs == rhs) {
return false;
}
if (m.is_value(rhs)) {
// values are always less in ordering than non-values.
bool v1 = m.is_value(lhs);
bool v2 = m.is_value(rhs);
if (!v1 && v2) {
return true;
}
if (v1 && !v2) {
return false;
}
SASSERT(is_ground(lhs) && is_ground(rhs));
if (depth(lhs) > depth(rhs)) {
return true;