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revert 'fix'

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-16 11:21:03 -07:00
parent e6ee58b628
commit a3f56f0d95
1 changed files with 5 additions and 2 deletions
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7
src/math/lp/nla_monotone_lemmas.cpp
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@ -46,6 +46,11 @@ void monotone::monotonicity_lemma(monic const& m) {
m[i] < val(m[i]) for val(m[i]) < 0
m >= product m[i] for product m[i] < 0
m <= product m[i] for product m[i] > 0
Example:
x <= -2 & y >= 3 => x*y <= -6
*/
void monotone::monotonicity_lemma_gt(const monic& m) {
new_lemma lemma(c(), __FUNCTION__);
@ -53,8 +58,6 @@ void monotone::monotonicity_lemma_gt(const monic& m) {
for (lpvar j : m.vars()) {
auto v = c().val(j);
lemma |= ineq(j, v.is_neg() ? llc::LT : llc::GT, v);
if (v.is_neg())
lemma |= ineq(j, llc::GT, 0);
product *= v;
}
lemma |= ineq(m.var(), product.is_neg() ? llc::GE : llc::LE, product);