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merge

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-10-14 15:16:22 -07:00
commit e9d615e309
204 changed files with 4620 additions and 2435 deletions
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49
src/sat/sat_solver.cpp
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@ -66,18 +66,20 @@ namespace sat {
m_next_simplify = 0;
m_num_checkpoints = 0;
m_simplifications = 0;
m_ext = 0;
m_ext = nullptr;
m_cuber = nullptr;
m_mc.set_solver(this);
}
solver::~solver() {
m_ext = 0;
m_ext = nullptr;
SASSERT(check_invariant());
TRACE("sat", tout << "Delete clauses\n";);
del_clauses(m_clauses);
TRACE("sat", tout << "Delete learned\n";);
del_clauses(m_learned);
dealloc(m_cuber);
m_cuber = nullptr;
}
void solver::del_clauses(clause_vector& clauses) {
@ -1008,14 +1010,39 @@ namespace sat {
}
lbool solver::cube(bool_var_vector& vars, literal_vector& lits, unsigned backtrack_level) {
if (!m_cuber) {
bool is_first = !m_cuber;
if (is_first) {
m_cuber = alloc(lookahead, *this);
}
lbool result = m_cuber->cube(vars, lits, backtrack_level);
m_cuber->update_cube_statistics(m_aux_stats);
if (result == l_false) {
switch (result) {
case l_false:
dealloc(m_cuber);
m_cuber = nullptr;
if (is_first) {
pop_to_base_level();
set_conflict(justification());
}
break;
case l_true: {
lits.reset();
pop_to_base_level();
model const& mdl = m_cuber->get_model();
for (bool_var v = 0; v < mdl.size(); ++v) {
if (value(v) != l_undef) {
continue;
}
literal l(v, false);
if (mdl[v] != l_true) l.neg();
push();
assign_core(l, justification());
}
mk_model();
break;
}
default:
break;
}
return result;
}
@ -1053,7 +1080,7 @@ namespace sat {
init_assumptions(num_lits, lits);
propagate(false);
if (check_inconsistent()) return l_false;
cleanup();
cleanup(m_config.m_force_cleanup);
if (m_config.m_unit_walk) {
return do_unit_walk();
@ -1127,7 +1154,7 @@ namespace sat {
srch.config().set_config(m_config);
srch.import(*this, false);
scoped_rl.push_child(&srch.rlimit());
lbool r = srch.check(num_lits, lits, 0);
lbool r = srch.check(num_lits, lits, nullptr);
m_model = srch.get_model();
// srch.collect_statistics(m_aux_stats);
return r;
@ -1264,7 +1291,7 @@ namespace sat {
if (!canceled) {
rlimit().reset_cancel();
}
set_par(0, 0);
set_par(nullptr, 0);
ls.reset();
uw.reset();
if (finished_id == -1) {
@ -1425,7 +1452,7 @@ namespace sat {
if (should_restart())
return l_undef;
if (at_base_lvl()) {
cleanup(); // cleaner may propagate frozen clauses
cleanup(false); // cleaner may propagate frozen clauses
if (inconsistent()) {
TRACE("sat", tout << "conflict at level 0\n";);
return l_false;
@ -1621,7 +1648,7 @@ namespace sat {
SASSERT(at_base_lvl());
m_cleaner();
m_cleaner(m_config.m_force_cleanup);
CASSERT("sat_simplify_bug", check_invariant());
m_scc();
@ -3662,10 +3689,10 @@ namespace sat {
// Simplification
//
// -----------------------
void solver::cleanup() {
void solver::cleanup(bool force) {
if (!at_base_lvl() || inconsistent())
return;
if (m_cleaner() && m_ext)
if (m_cleaner(force) && m_ext)
m_ext->clauses_modifed();
}