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fix

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This commit is contained in:
Valentin Promies 2026-02-20 12:56:27 +01:00
parent 8f9c527444
commit 6d3f3f2c35
2 changed files with 11 additions and 8 deletions
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17
src/nlsat/nlsat_explain.cpp
View file

@ -50,6 +50,7 @@ namespace nlsat {
bool m_factor;
bool m_add_all_coeffs;
bool m_add_zero_disc;
bool m_linear_project;
assignment const & sample() const { return m_solver.sample(); }
assignment & sample() { return m_solver.sample(); }
@ -102,6 +103,8 @@ namespace nlsat {
m_minimize_cores = false;
m_add_all_coeffs = false;
m_add_zero_disc = false;
m_linear_project = false;
}
// display helpers moved to free functions in nlsat_common.h
@ -1144,9 +1147,9 @@ namespace nlsat {
/**
* \brief add cell literals for the linearized projection and categorize the polynomials in ps
* - ps_below will contain all polynomials from ps which have a root below m_assignment w.r.t. x
* - ps_above will contain all polynomials from ps which have a root above m_assignment w.r.t. x
* - ps_equal will contain at least one polynomial from ps which have a root equal to m_assignment
* - ps_below will contain all polynomials from ps which have a root below sample() w.r.t. x
* - ps_above will contain all polynomials from ps which have a root above sample() w.r.t. x
* - ps_equal will contain at least one polynomial from ps which have a root equal to sample()
* - In addition, they may contain additional linear polynomials added as cell boundaries
* - The back elements of ps_below, ps_above, ps_equal are the polynomials used for the cell literals
*/
@ -1159,8 +1162,8 @@ namespace nlsat {
ps_above.reset();
ps_equal.reset();
SASSERT(m_assignment.is_assigned(x));
anum const & x_val = m_assignment.value(x);
SASSERT(sample().is_assigned(x));
anum const & x_val = sample().value(x);
bool lower_inf = true, upper_inf = true;
scoped_anum lower(m_am), upper(m_am);
@ -1177,7 +1180,7 @@ namespace nlsat {
roots.reset();
// Temporarily unassign x, s.t. isolate_roots does not assume p as constant.
m_am.isolate_roots(p, undef_var_assignment(m_assignment, x), roots);
m_am.isolate_roots(p, undef_var_assignment(sample(), x), roots);
unsigned num_roots = roots.size();
if (num_roots == 0)
continue;
@ -1298,7 +1301,7 @@ namespace nlsat {
polynomial_ref_vector ps_above_sample(m_pm);
polynomial_ref_vector ps_equal_sample(m_pm);
var x = m_todo.extract_max_polys(ps);
if (!m_assignment.is_assigned(x)) {
if (!sample().is_assigned(x)) {
// top level projection like original
// we could also do a covering-style projection, sparing some resultants
add_lcs(ps, x);

2
src/nlsat/nlsat_solver.cpp
View file

@ -2197,7 +2197,7 @@ namespace nlsat {
clause.reset();
m_lazy_clause.reset();
m_explain.set_linear_project(true);
m_explain.main_operator(1, &best_literal, m_lazy_clause);
m_explain.compute_conflict_explanation(1, &best_literal, m_lazy_clause);
m_explain.set_linear_project(false);
for (auto l : m_lazy_clause) {