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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-07-22 10:43:50 -07:00
parent 640cf1809d
commit dd5e2e8930
2 changed files with 5 additions and 1 deletions
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src/sat/sat_solver.cpp
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@ -3974,7 +3974,8 @@ namespace sat {
double multiplier = m_config.m_reward_offset * (is_sat ? m_config.m_reward_multiplier : 1.0);
for (unsigned i = qhead; i < m_trail.size(); ++i) {
auto v = m_trail[i].var();
auto reward = multiplier / (m_stats.m_conflict - m_last_conflict[v] + 1);
auto d = std::max(1ull,m_stats.m_conflict - m_last_conflict[v] + 1);
auto reward = multiplier / d;
auto activity = m_activity[v];
set_activity(v, static_cast<unsigned>(m_step_size * reward + ((1.0 - m_step_size) * activity)));
}