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remove legacy bce

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-02-03 09:39:39 -08:00
parent e95840b640
commit db347c007d
2 changed files with 18 additions and 95 deletions
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4
src/sat/sat_config.cpp
View file

@ -110,8 +110,8 @@ namespace sat {
m_lookahead_global_autarky = p.lookahead_global_autarky();
// These parameters are not exposed
m_simplify_mult1 = _p.get_uint("simplify_mult1", 100);
m_simplify_mult2 = _p.get_double("simplify_mult2", 1.2);
m_simplify_mult1 = _p.get_uint("simplify_mult1", 300);
m_simplify_mult2 = _p.get_double("simplify_mult2", 1.5);
m_simplify_max = _p.get_uint("simplify_max", 500000);
// --------------------------------

109
src/sat/sat_simplifier.cpp
View file

@ -1003,6 +1003,7 @@ namespace sat {
}
enum elim_type {
bce_t,
cce_t,
acce_t,
abce_t,
@ -1024,21 +1025,13 @@ namespace sat {
cce<abce_t>();
}
if (s.bce_enabled() && !s.cce_enabled() && !s.abce_enabled()) {
block_clauses();
cce<bce_t>();
}
if (s.bca_enabled()) {
bca();
}
}
void block_clauses() {
insert_queue();
while (!m_queue.empty() && m_counter >= 0) {
s.checkpoint();
process(m_queue.next());
}
}
void insert_queue() {
unsigned num_vars = s.s.num_vars();
for (bool_var v = 0; v < num_vars; v++) {
@ -1049,55 +1042,6 @@ namespace sat {
}
}
void process(literal l) {
TRACE("blocked_clause", tout << "processing: " << l << "\n";);
if (!process_var(l.var())) {
return;
}
integrity_checker si(s.s);
process_clauses(l);
process_binary(l);
}
void process_binary(literal l) {
model_converter::entry* new_entry = 0;
watch_list & wlist = s.get_wlist(~l);
m_counter -= wlist.size();
for (watched& w : wlist) {
if (!w.is_binary_non_learned_clause()) {
continue;
}
literal l2 = w.get_literal();
s.mark_visited(l2);
if (all_tautology(l)) {
block_binary(w, l, new_entry);
w.set_learned(true);
s.s.set_learned1(l2, l, true);
s.m_num_bce++;
}
s.unmark_visited(l2);
}
}
void process_clauses(literal l) {
model_converter::entry* new_entry = 0;
clause_use_list & occs = s.m_use_list.get(l);
clause_use_list::iterator it = occs.mk_iterator();
for (; !it.at_end(); it.next()) {
clause & c = it.curr();
if (c.is_learned()) continue;
m_counter -= c.size();
SASSERT(c.contains(l));
s.mark_all_but(c, l);
if (all_tautology(l)) {
block_clause(c, l, new_entry);
s.m_num_bce++;
s.set_learned(c);
}
s.unmark_all(c);
}
}
void reset_intersection() {
for (literal l : m_intersection) m_in_intersection[l.index()] = false;
m_intersection.reset();
@ -1359,7 +1303,7 @@ namespace sat {
}
bool above_threshold(unsigned sz0) const {
if (sz0 * 400 < m_covered_clause.size()) IF_VERBOSE(0, verbose_stream() << "above threshold " << sz0 << " " << m_covered_clause.size() << "\n";);
// if (sz0 * 400 < m_covered_clause.size()) IF_VERBOSE(0, verbose_stream() << "above threshold " << sz0 << " " << m_covered_clause.size() << "\n";);
return sz0 * 400 < m_covered_clause.size();
}
@ -1374,6 +1318,7 @@ namespace sat {
switch (et) {
case abce_t:
case bce_t:
k = model_converter::BLOCK_LIT;
break;
case cce_t:
@ -1416,10 +1361,12 @@ namespace sat {
first = false;
}
if (is_tautology || et == abce_t) {
if (is_tautology || et == abce_t || et == bce_t) {
for (literal l : m_covered_clause) s.unmark_visited(l);
m_covered_clause.shrink(sz0);
return is_tautology ? abce_t : no_t;
if (!is_tautology) return no_t;
if (et == bce_t) return bce_t;
return abce_t;
}
/*
@ -1534,6 +1481,7 @@ namespace sat {
case acce_t: s.m_num_acce++; break;
case abce_t: s.m_num_abce++; break;
case ate_t: s.m_num_ate++; break;
case bce_t: s.m_num_bce++; break;
default: break;
}
}
@ -1545,52 +1493,27 @@ namespace sat {
return (sz > 3) || s.s.m_rand(4) == 0;
}
void prepare_block_clause(clause& c, literal l, model_converter::entry*& new_entry, model_converter::kind k) {
void block_covered_clause(clause& c, literal l, model_converter::kind k) {
TRACE("blocked_clause", tout << "new blocked clause: " << c << "\n";);
VERIFY(!s.is_external(l));
if (new_entry == 0)
new_entry = &(mc.mk(k, l.var()));
SASSERT(!s.is_external(l));
model_converter::entry& new_entry = mc.mk(k, l.var());
for (literal lit : c) {
if (lit != l && process_var(lit.var())) {
m_queue.decreased(~lit);
}
}
}
void block_clause(clause& c, literal l, model_converter::entry *& new_entry) {
SASSERT(!s.is_external(l.var()));
prepare_block_clause(c, l, new_entry, model_converter::BLOCK_LIT);
mc.insert(*new_entry, c);
}
void block_covered_clause(clause& c, literal l, model_converter::kind k) {
SASSERT(!s.is_external(l.var()));
model_converter::entry * new_entry = 0;
prepare_block_clause(c, l, new_entry, k);
mc.insert(*new_entry, m_covered_clause, m_elim_stack);
mc.insert(new_entry, m_covered_clause, m_elim_stack);
}
void prepare_block_binary(watched const& w, literal l1, literal blocked, model_converter::entry*& new_entry, model_converter::kind k) {
void block_covered_binary(watched const& w, literal l1, literal blocked, model_converter::kind k) {
SASSERT(!s.is_external(blocked));
if (new_entry == 0)
new_entry = &(mc.mk(k, blocked.var()));
model_converter::entry& new_entry = mc.mk(k, blocked.var());
literal l2 = w.get_literal();
TRACE("blocked_clause", tout << "new blocked clause: " << l2 << " " << l1 << "\n";);
s.set_learned(l1, l2);
mc.insert(new_entry, m_covered_clause, m_elim_stack);
m_queue.decreased(~l2);
}
void block_binary(watched const& w, literal l, model_converter::entry *& new_entry) {
literal l2 = w.get_literal();
prepare_block_binary(w, l, l, new_entry, model_converter::BLOCK_LIT);
mc.insert(*new_entry, l, l2);
}
void block_covered_binary(watched const& w, literal l, literal blocked, model_converter::kind k) {
model_converter::entry * new_entry = 0;
prepare_block_binary(w, l, blocked, new_entry, k);
mc.insert(*new_entry, m_covered_clause, m_elim_stack);
}
void bca() {
m_queue.reset();