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add option to reduce pseudo-linear monomials

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-09-04 11:03:58 -07:00
parent 6eee8688c2
commit 98a9a34f2b
5 changed files with 65 additions and 27 deletions
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19
src/math/lp/nla_grobner.cpp
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@ -841,22 +841,6 @@ namespace nla {
m_solver.add(p, dep);
}
bool grobner::is_pseudo_linear(unsigned_vector const& vars) const {
bool has_unbounded = false;
for (auto v : vars) {
if (c().lra.column_is_bounded(v) && c().lra.var_is_int(v)) {
auto lb = c().lra.get_lower_bound(v);
auto ub = c().lra.get_upper_bound(v);
if (ub - lb <= rational(4))
continue;
}
if (has_unbounded)
return false;
has_unbounded = true;
}
return true;
}
void grobner::add_fixed_monic(unsigned j) {
u_dependency* dep = nullptr;
dd::pdd r = m_pdd_manager.mk_val(rational(1));
@ -882,8 +866,7 @@ namespace nla {
TRACE(grobner, for (lpvar j : c().m_to_refine) print_monic(c().emons()[j], tout) << "\n";);
for (lpvar j : c().m_to_refine)
if (!is_pseudo_linear(c().emons()[j].vars()))
q.push_back(j);
q.push_back(j);
while (!q.empty()) {
lpvar j = q.back();