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fix unsoundness bug

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-05-01 14:45:15 -07:00
parent 869643a551
commit 04c55c34e5
2 changed files with 32 additions and 4 deletions
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15
src/nlsat/nlsat_solver.cpp
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@ -2742,10 +2742,8 @@ namespace nlsat {
while (elim_uncnstr())
;
while (fm())
;
if (!solve_eqs())
return false;
@ -3017,6 +3015,8 @@ namespace nlsat {
if (apply_fm_equality(x, clauses, lo, hi))
return true;
return false;
if (!all_solved)
return false;
@ -3104,6 +3104,13 @@ namespace nlsat {
a1 = m_asm.mk_join(a1, a2);
m_lemma_assumptions = a1;
polynomial_ref A(l.A), B(l.B);
if (m_pm.is_neg(l.A)) {
A = -A;
B = -B;
}
// TODO: this can also replace solve_eqs
for (auto c : clauses) {
if (c->is_removed())
@ -3114,7 +3121,7 @@ namespace nlsat {
m_lemma.reset();
bool is_tautology = false;
for (literal lit : *c) {
lit = substitute_var(x, l.A, l.B, lit);
lit = substitute_var(x, A, B, lit);
m_lemma.push_back(lit);
if (lit == true_literal)
is_tautology = true;
@ -3126,7 +3133,7 @@ namespace nlsat {
IF_VERBOSE(3,
if (cls) {
verbose_stream() << "x" << x << " * " << l.A << " = " << l.B << "\n";
m_display_var(verbose_stream(), x) << " * " << l.A << " = " << l.B << "\n";
display(verbose_stream(), *c) << " -> ";
display(verbose_stream(), *cls) << "\n";
});