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fix #6969

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-10-29 17:43:14 -07:00
parent 9d57bdd2ef
commit 589024aa1c
2 changed files with 20 additions and 9 deletions
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12
src/math/lp/nla_grobner.cpp
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@ -199,14 +199,22 @@ namespace nla {
// IF_VERBOSE(0, verbose_stream() << "factored " << q << " : " << vars << "\n");
term t;
rational lc(1);
auto ql = q;
while (!ql.is_val()) {
lc = lcm(lc, denominator(ql.hi().val()));
ql = q.lo();
}
lc = lcm(denominator(ql.val()), lc);
while (!q.is_val()) {
t.add_monomial(q.hi().val(), q.var());
t.add_monomial(lc*q.hi().val(), q.var());
q = q.lo();
}
vector<ineq> ineqs;
for (auto v : vars)
ineqs.push_back(ineq(v, llc::EQ, rational::zero()));
ineqs.push_back(ineq(t, llc::EQ, -q.val()));
ineqs.push_back(ineq(t, llc::EQ, -lc*q.val()));
for (auto const& i : ineqs)
if (c().ineq_holds(i))
return false;