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fix #6637

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This commit is contained in:
Nikolaj Bjorner 2023-03-22 08:49:33 +01:00
parent 53ca65a62e
commit 2683a2d6ed
2 changed files with 4 additions and 3 deletions
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5
src/math/lp/nla_divisions.cpp
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@ -58,10 +58,11 @@ namespace nla {
auto monotonicity1 = [&](auto x1, auto& x1val, auto y1, auto& y1val, auto& q1, auto& q1val,
auto x2, auto& x2val, auto y2, auto& y2val, auto& q2, auto& q2val) {
if (y1val >= y2val && y2val > 0 && x1val <= x2val && q1val > q2val) {
new_lemma lemma(c, "y1 >= y2 > 0 & x1 <= x2 => x1/y1 <= x2/y2");
if (y1val >= y2val && y2val > 0 && 0 <= x1val && x1val <= x2val && q1val > q2val) {
new_lemma lemma(c, "y1 >= y2 > 0 & 0 <= x1 <= x2 => x1/y1 <= x2/y2");
lemma |= ineq(term(y1, rational(-1), y2), llc::LT, 0);
lemma |= ineq(y2, llc::LE, 0);
lemma |= ineq(x1, llc::LT, 0);
lemma |= ineq(term(x1, rational(-1), x2), llc::GT, 0);
lemma |= ineq(term(q1, rational(-1), q2), llc::LE, 0);
return true;