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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-01-19 15:19:07 +01:00
parent 0f03ef4ab0
commit e5767bf2b8
6 changed files with 43 additions and 7 deletions
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27
src/sat/smt/user_solver.cpp
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@ -36,6 +36,10 @@ namespace user_solver {
return n->get_th_var(get_id());
euf::theory_var v = mk_var(n);
ctx.attach_th_var(n, this, v);
expr_ref r(m);
sat::literal_vector explain;
if (ctx.is_fixed(n, r, explain))
m_prop.push_back(prop_info(explain, v, r));
return v;
}
@ -93,6 +97,18 @@ namespace user_solver {
m_pop_eh(m_user_context, num_scopes);
}
void solver::propagate_consequence(prop_info const& prop) {
sat::literal lit = ctx.internalize(prop.m_conseq, false, false, true);
if (s().value(lit) != l_true) {
s().assign(lit, mk_justification(m_qhead));
++m_stats.m_num_propagations;
}
}
void solver::propagate_new_fixed(prop_info const& prop) {
new_fixed_eh(prop.m_var, prop.m_conseq, prop.m_lits.size(), prop.m_lits.data());
}
bool solver::unit_propagate() {
if (m_qhead == m_prop.size())
return false;
@ -100,12 +116,11 @@ namespace user_solver {
ctx.push(value_trail<unsigned>(m_qhead));
unsigned np = m_stats.m_num_propagations;
for (; m_qhead < m_prop.size() && !s().inconsistent(); ++m_qhead) {
auto const& prop = m_prop[m_qhead];
sat::literal lit = ctx.internalize(prop.m_conseq, false, false, true);
if (s().value(lit) != l_true) {
s().assign(lit, mk_justification(m_qhead));
++m_stats.m_num_propagations;
}
auto const& prop = m_prop[m_qhead];
if (prop.m_var == euf::null_theory_var)
propagate_consequence(prop);
else
propagate_new_fixed(prop);
}
return np < m_stats.m_num_propagations;
}