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fix #3225

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-03-10 15:10:18 -07:00
parent dd4eb7f97c
commit 99784a92ef
3 changed files with 12 additions and 16 deletions
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16
src/nlsat/nlsat_solver.cpp
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@ -640,16 +640,6 @@ namespace nlsat {
literal mk_ineq_literal(atom::kind k, unsigned sz, poly * const * ps, bool const * is_even) {
SASSERT(k == atom::LT || k == atom::GT || k == atom::EQ);
if (sz == 0) {
switch (k) {
case atom::LT: return false_literal; // 0 < 0
case atom::EQ: return true_literal; // 0 == 0
case atom::GT: return false_literal; // 0 > 0
default:
UNREACHABLE();
return null_literal;
}
}
bool is_const = true;
polynomial::manager::scoped_numeral cnst(m_pm.m());
m_pm.m().set(cnst, 1);
@ -2657,6 +2647,7 @@ namespace nlsat {
for (clause* c : m_clauses) {
if (solve_var(*c, v, p, q)) {
q = -q;
TRACE("nlsat", tout << "p: " << p << "\nq: " << q << "\n x" << v << "\n";);
m_patch_var.push_back(v);
m_patch_num.push_back(q);
m_patch_denom.push_back(p);
@ -2698,6 +2689,8 @@ namespace nlsat {
u_map<literal> b2l;
scoped_literal_vector lits(m_solver);
svector<bool> even;
polynomial::manager::scoped_numeral cnst(m_pm.m());
m_pm.m().set(cnst, 1);
unsigned num_atoms = m_atoms.size();
for (unsigned j = 0; j < num_atoms; ++j) {
atom* a = m_atoms[j];
@ -2712,9 +2705,12 @@ namespace nlsat {
poly * po = a1.p(i);
m_pm.substitute(po, x, q, p, pr);
change |= pr != po;
TRACE("nlsat", tout << pr << "\n";);
if (m_pm.is_zero(pr)) {
ps.reset();
even.reset();
even.push_back(false);
ps.push_back(pr);
break;
}
if (m_pm.is_const(pr)) {