mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-08 10:25:18 +00:00
Code Activity

fixes to sls

Browse source
This commit is contained in:
Nikolaj Bjorner 2024-11-16 08:28:17 -08:00
parent 7c5ff7c623
commit 197951cad4
8 changed files with 33 additions and 46 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/ast/sls/sat_ddfw.cpp
View file

@ -43,7 +43,7 @@ namespace sat {
check_without_plugin();
remove_assumptions();
log();
return m_min_sz == 0 ? l_true : l_undef;
return m_min_sz == 0 && m_limit.inc() ? m_last_result : l_undef;
}
void ddfw::check_without_plugin() {
@ -401,7 +401,7 @@ namespace sat {
m_model[i] = to_lbool(value(i));
save_priorities();
if (m_plugin)
m_plugin->on_save_model();
m_last_result = m_plugin->on_save_model();
}
void ddfw::save_best_values() {

3
src/ast/sls/sat_ddfw.h
View file

@ -39,7 +39,7 @@ namespace sat {
//virtual void init_search() = 0;
//virtual void finish_search() = 0;
virtual void on_rescale() = 0;
virtual void on_save_model() = 0;
virtual lbool on_save_model() = 0;
virtual void on_restart() = 0;
};
@ -90,6 +90,7 @@ namespace sat {
unsigned_vector m_flat_use_list;
unsigned_vector m_use_list_index;
unsigned m_use_list_vars = 0, m_use_list_clauses = 0;
lbool m_last_result = l_true;
indexed_uint_set m_unsat;
indexed_uint_set m_unsat_vars; // set of variables that are in unsat clauses

18
src/ast/sls/sls_arith_base.cpp
View file

@ -256,9 +256,6 @@ namespace sls {
num_t eps(1);
if (!is_int(x) && abs(rh - lh) <= eps)
eps = abs(rh - lh) / num_t(2);
// verbose_stream() << a << " " << b << " " << c << "\n";
// verbose_stream() << (-b - root) << " " << (2 * a) << " " << ll << " " << lh << "\n";
// verbose_stream() << (-b + root) << " " << (2 * a) << " " << rl << " " << rh << "\n";
SASSERT(ll <= lh && ll + 1 >= lh);
SASSERT(rl <= rh && rl + 1 >= rh);
SASSERT(!is_square || ll != lh || a * ll * ll + b * ll + c == 0);
@ -571,8 +568,6 @@ namespace sls {
template<typename num_t>
bool arith_base<num_t>::repair(sat::literal lit) {
//verbose_stream() << "repair " << lit << " " << (ctx.is_unit(lit)?"unit":"") << " " << mk_bounded_pp(ctx.atom(lit.var()), m) << "\n";
//verbose_stream() << *atom(lit.var()) << "\n";
m_last_literal = lit;
if (find_nl_moves(lit))
return true;
@ -673,8 +668,6 @@ namespace sls {
return false;
}
// IF_VERBOSE(0, display(verbose_stream(), v) << " := " << new_value << "\n");
#if 0
@ -690,7 +683,6 @@ namespace sls {
SASSERT(ctx.is_true(lit));
ineq.m_args_value += coeff * (new_value - old_value);
num_t dtt_new = dtt(old_sign, ineq);
// verbose_stream() << "dtt " << lit << " " << ineq << " " << dtt_new << "\n";
if (dtt_new != 0)
ctx.flip(bv);
SASSERT(dtt(sign(bv), ineq) == 0);
@ -800,7 +792,6 @@ namespace sls {
SASSERT(ctx.is_true(lit));
ineq.m_args_value += coeff * (new_value - old_value);
num_t dtt_new = dtt(old_sign, ineq);
// verbose_stream() << "dtt " << lit << " " << ineq << " " << dtt_new << "\n";
if (dtt_new != 0)
ctx.flip(bv);
SASSERT(dtt(sign(bv), ineq) == 0);
@ -1006,7 +997,6 @@ namespace sls {
typename arith_base<num_t>::var_t arith_base<num_t>::mk_var(expr* e) {
var_t v = m_expr2var.get(e->get_id(), UINT_MAX);
if (v == UINT_MAX) {
// verbose_stream() << "mk-var " << mk_bounded_pp(e, m) << "\n";
v = m_vars.size();
m_expr2var.setx(e->get_id(), v, UINT_MAX);
m_vars.push_back(var_info(e, a.is_int(e) ? var_sort::INT : var_sort::REAL));
@ -1245,7 +1235,6 @@ namespace sls {
return false;
flet<bool> _tabu(m_use_tabu, false);
TRACE("sls", tout << "repair def " << mk_bounded_pp(vi.m_expr, m) << "\n");
// verbose_stream() << "repair down " << mk_bounded_pp(e, m) << "\n";
switch (vi.m_op) {
case arith_op_kind::LAST_ARITH_OP:
break;
@ -1522,11 +1511,8 @@ namespace sls {
if (old_value == sum)
return true;
//display(verbose_stream() << "repair add v" << v << " ", ad) << " " << old_value << " sum " << sum << "\n";
m_updates.reset();
// display(verbose_stream(), v) << " ";
// verbose_stream() << mk_bounded_pp(m_vars[v].m_expr, m) << " := " << old_value << " " << sum << "\n";
for (auto const& [coeff, w] : coeffs) {
auto delta = divide(w, sum - old_value, coeff);
@ -1590,8 +1576,6 @@ namespace sls {
}
}
// verbose_stream() << "repair product v" << v << "\n";
if (apply_update())
return eval_is_correct(v);
@ -1957,7 +1941,6 @@ namespace sls {
}
else
new_value = val;
//verbose_stream() << v << " " << vi.m_value << " -> " << new_value << "\n";
vi.m_value = new_value;
}
else {
@ -2308,7 +2291,6 @@ namespace sls {
num_t val = i.m_coeff;
for (auto const& [c, v] : i.m_args)
val += c * value(v);
//verbose_stream() << "invariant " << i << "\n";
if (val != i.m_args_value)
verbose_stream() << i << "\n";
SASSERT(val == i.m_args_value);

19
src/ast/sls/sls_smt_plugin.cpp
View file

@ -156,10 +156,8 @@ namespace sls {
if (!e)
return false;
bv_util bv(m);
if (bv.is_bit2bool(e, t) && m_shared_terms.contains(t->get_id())) {
verbose_stream() << "shared bit2bool " << mk_bounded_pp(e, ctx.get_manager()) << "\n";
return true;
}
if (bv.is_bit2bool(e, t) && m_shared_terms.contains(t->get_id()))
return true;
// if arith.is_le(e, s, t) && t is a numeral, s is shared-term....
return false;
@ -175,7 +173,6 @@ namespace sls {
}
void smt_plugin::add_unit(sat::literal lit) {
verbose_stream() << "add unit " << lit << " " << is_shared(lit) << "\n";
if (!is_shared(lit))
return;
std::lock_guard<std::mutex> lock(m_mutex);
@ -222,6 +219,7 @@ namespace sls {
}
void smt_plugin::smt_phase_to_sls() {
IF_VERBOSE(2, verbose_stream() << "SMT -> SLS phase\n");
for (auto v : m_shared_bool_vars) {
auto w = m_smt_bool_var2sls_bool_var[v];
auto phase = ctx.get_best_phase(v);
@ -232,6 +230,7 @@ namespace sls {
}
void smt_plugin::smt_values_to_sls() {
IF_VERBOSE(2, verbose_stream() << "SMT -> SLS values\n");
for (auto const& [t, t_sync] : m_smt2sync_uninterp) {
expr_ref val_t(m);
if (!ctx.get_smt_value(t, val_t))
@ -261,7 +260,9 @@ namespace sls {
if (m_shared_bool_vars.contains(v)) {
auto w = m_smt_bool_var2sls_bool_var[v];
sat::literal sls_lit(w, lit.sign());
IF_VERBOSE(2, verbose_stream() << "unit " << sls_lit << "\n");
if (m_context.is_unit(sls_lit))
continue;
IF_VERBOSE(3, verbose_stream() << "unit " << sls_lit << "\n");
m_ddfw->add(1, &sls_lit);
}
else {
@ -350,15 +351,17 @@ namespace sls {
m_sls2sync_uninterp.insert(sls_t, sync_t);
}
void smt_plugin::on_save_model() {
lbool smt_plugin::on_save_model() {
TRACE("sls", display(tout));
lbool r = l_true;
while (unsat().empty()) {
m_context.check();
r = m_context.check();
if (!m_new_clause_added)
break;
m_ddfw->reinit();
m_new_clause_added = false;
}
export_from_sls();
return r;
}
}

4
src/ast/sls/sls_smt_plugin.h
View file

@ -124,10 +124,10 @@ namespace sls {
m_ddfw->reinit();
}
void on_save_model() override;
lbool on_save_model() override;
void on_model(model_ref& mdl) override {
IF_VERBOSE(3, verbose_stream() << "on-model " << "\n");
IF_VERBOSE(2, verbose_stream() << "on-model " << "\n");
m_sls_model = mdl;
}

11
src/ast/sls/sls_smt_solver.cpp
View file

@ -49,13 +49,14 @@ namespace sls {
}
bool m_on_save_model = false;
void on_save_model() override {
lbool on_save_model() override {
lbool r = l_true;
if (m_on_save_model)
return;
return r;
flet<bool> _on_save_model(m_on_save_model, true);
CTRACE("sls", unsat().empty(), display(tout));
while (unsat().empty()) {
m_context.check();
r = m_context.check();
if (!m_new_constraint)
break;
TRACE("sls", display(tout));
@ -63,10 +64,10 @@ namespace sls {
m_ddfw.reinit();
m_new_constraint = false;
}
return r;
}
void on_model(model_ref& mdl) override {
IF_VERBOSE(1, verbose_stream() << "on-model " << "\n");
void on_model(model_ref& mdl) override {
m_model = mdl;
}

19
src/smt/theory_sls.cpp
View file

@ -105,10 +105,9 @@ namespace smt {
if (!m_smt_plugin)
return;
unsigned scope_lvl = ctx.get_scope_level();
if (ctx.get_search_level() == scope_lvl - n) {
if (ctx.get_search_level() == ctx.get_scope_level() - n) {
auto& lits = ctx.assigned_literals();
for (; m_trail_lim < lits.size() && ctx.get_assign_level(lits[m_trail_lim]) == scope_lvl; ++m_trail_lim)
for (; m_trail_lim < lits.size() && ctx.get_assign_level(lits[m_trail_lim]) == ctx.get_search_level(); ++m_trail_lim)
m_smt_plugin->add_unit(lits[m_trail_lim]);
}
@ -141,7 +140,8 @@ namespace smt {
m_threshold *= 2;
m_smt_plugin->smt_units_to_sls();
bounded_run(m_restart_ls_steps);
m_smt_plugin->sls_activity_to_smt();
if (m_smt_plugin)
m_smt_plugin->sls_activity_to_smt();
}
m_difference_score = 0;
m_difference_score_threshold = 1;
@ -170,11 +170,12 @@ namespace smt {
m_smt_plugin->smt_values_to_sls();
bounded_run(m_final_check_ls_steps);
dec_final_check_ls_steps();
m_smt_plugin->sls_phase_to_smt();
m_smt_plugin->sls_values_to_smt();
if (m_num_guided_sls % 20 == 0)
m_smt_plugin->sls_activity_to_smt();
if (m_smt_plugin) {
m_smt_plugin->sls_phase_to_smt();
m_smt_plugin->sls_values_to_smt();
if (m_num_guided_sls % 20 == 0)
m_smt_plugin->sls_activity_to_smt();
}
return FC_DONE;
}

1
src/smt/theory_sls.h
View file

@ -56,7 +56,6 @@ namespace smt {
bool m_checking = false;
bool m_parallel_mode = true;
unsigned m_threshold = 1;
unsigned m_restart_sls_count = 0;
unsigned m_difference_score = 0;
unsigned m_difference_score_threshold = 0;
unsigned m_num_guided_sls = 0;