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skip unassigned variables when computing level

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This commit is contained in:
Jakob Rath 2022-01-20 17:46:23 +01:00
parent 0a59387d05
commit 543ad2f205
1 changed files with 3 additions and 1 deletions
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4
src/math/polysat/solver.cpp
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@ -750,8 +750,10 @@ namespace polysat {
void solver::assign_eval(sat::literal lit) {
unsigned level = 0;
// NOTE: constraint may be evaluated even if some variables are still unassigned (e.g., 0*x doesn't depend on x).
for (auto v : lit2cnstr(lit)->vars())
level = std::max(get_level(v), level);
if (is_assigned(v))
level = std::max(get_level(v), level);
m_bvars.eval(lit, level);
m_trail.push_back(trail_instr_t::assign_bool_i);
m_search.push_boolean(lit);