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simplify parallel_tactical2: use std::min and consistent mk_not

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- Replace manual conflict cap with std::min in update_max_conflicts()
- Use mk_not(m, c) instead of mk_not(expr_ref(c, m)) for consistency
  with the existing call pattern at line 349

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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github-actions[bot] 2026-05-14 05:35:11 +00:00 • committed by GitHub
parent 09b75d2122
commit 7ea6e9bed4
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1 changed files with 4 additions and 6 deletions
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10
src/solver/parallel_tactical2.cpp
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@ -471,11 +471,9 @@ class parallel_solver {
unsigned m_shared_clause_limit = 0;
void update_max_conflicts() {
m_config.m_threads_max_conflicts = static_cast<unsigned>(
m_config.m_max_conflict_mul * m_config.m_threads_max_conflicts);
/* cap at the configured global maximum to prevent runaway cube checks */
if (m_config.m_threads_max_conflicts > m_config.m_max_conflicts)
m_config.m_threads_max_conflicts = m_config.m_max_conflicts;
m_config.m_threads_max_conflicts = std::min(
static_cast<unsigned>(m_config.m_max_conflict_mul * m_config.m_threads_max_conflicts),
m_config.m_max_conflicts);
}
/* Check the current cube (passed as additional assumptions).
@ -675,7 +673,7 @@ class parallel_solver {
* as a learned clause: ¬(c₁ ∧ … ∧ cₙ) ≡ ¬c₁ ∨ … ∨ ¬cₙ */
expr_ref_vector neg_lits(m);
for (expr* c : cube_core)
neg_lits.push_back(mk_not(expr_ref(c, m)));
neg_lits.push_back(mk_not(m, c));
expr_ref clause(mk_or(neg_lits), m);
b.collect_clause(m_l2g, id, clause.get());
}