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set clean shutdown for local search and re-enable local search when it parallelizes with PB solver

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-06-30 16:06:44 -07:00
parent b2b3bab246
commit 8de2544abb
4 changed files with 24 additions and 9 deletions
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7
src/sat/sat_local_search.cpp
View file

@ -362,7 +362,7 @@ namespace sat {
set_phase(i, phase[i]);
}
void local_search::import(solver const& s, bool _init) {
void local_search::import(solver const& s, bool _init) {
flet<bool> linit(m_initializing, true);
m_is_pb = false;
m_vars.reset();
@ -412,9 +412,10 @@ namespace sat {
[&](unsigned sz, literal const* c, unsigned k) { add_cardinality(sz, c, k); };
std::function<void(unsigned sz, literal const* c, unsigned const* coeffs, unsigned k)> pb =
[&](unsigned sz, literal const* c, unsigned const* coeffs, unsigned k) { add_pb(sz, c, coeffs, k); };
if (ext && (!ext->is_pb() || !ext->extract_pb(card, pb)))
if (ext && (!ext->is_pb() || !ext->extract_pb(card, pb))) {
IF_VERBOSE(0, verbose_stream() << (ext) << " is-pb " << (!ext && ext->is_pb()) << "\n");
throw default_exception("local search is incomplete with extensions beyond PB");
}
if (_init)
init();
}

6
src/sat/sat_parallel.cpp
View file

@ -87,9 +87,15 @@ namespace sat {
parallel::parallel(solver& s): m_num_clauses(0), m_consumer_ready(false), m_scoped_rlimit(s.rlimit()) {}
parallel::~parallel() {
reset();
}
void parallel::reset() {
m_limits.reset();
m_scoped_rlimit.reset();
for (auto* s : m_solvers)
dealloc(s);
m_solvers.reset();
}
void parallel::init_solvers(solver& s, unsigned num_extra_solvers) {

2
src/sat/sat_parallel.h
View file

@ -78,6 +78,8 @@ namespace sat {
~parallel();
void reset();
void init_solvers(solver& s, unsigned num_extra_solvers);
void push_child(reslimit& rl);

18
src/sat/sat_solver.cpp
View file

@ -1243,8 +1243,11 @@ namespace sat {
m_cleaner(true);
return do_local_search(num_lits, lits);
}
if ((m_config.m_num_threads > 1 || m_config.m_local_search_threads > 0 ||
m_config.m_ddfw_threads > 0) && !m_par && !m_ext) {
if ((m_config.m_num_threads > 1 || m_config.m_ddfw_threads > 0) && !m_par && !m_ext) {
SASSERT(scope_lvl() == 0);
return check_par(num_lits, lits);
}
if (m_config.m_local_search_threads > 0 && !m_par && (!m_ext || m_ext->is_pb())) {
SASSERT(scope_lvl() == 0);
return check_par(num_lits, lits);
}
@ -1460,15 +1463,17 @@ namespace sat {
if (!rlimit().inc()) {
return l_undef;
}
if (m_ext)
if (m_ext && !m_ext->is_pb())
return l_undef;
scoped_ptr_vector<i_local_search> ls;
scoped_ptr_vector<solver> uw;
int num_extra_solvers = m_config.m_num_threads - 1;
int num_local_search = static_cast<int>(m_config.m_local_search_threads);
int num_ddfw = m_ext ? 0 : static_cast<int>(m_config.m_ddfw_threads);
int num_threads = num_extra_solvers + 1 + num_local_search + num_ddfw;
vector<reslimit> lims(num_ddfw);
scoped_ptr_vector<i_local_search> ls;
scoped_ptr_vector<solver> uw;
for (int i = 0; i < num_local_search; ++i) {
local_search* l = alloc(local_search);
l->updt_params(m_params);
@ -1477,7 +1482,7 @@ namespace sat {
ls.push_back(l);
}
vector<reslimit> lims(num_ddfw);
// set up ddfw search
for (int i = 0; i < num_ddfw; ++i) {
ddfw* d = alloc(ddfw);
@ -1593,6 +1598,7 @@ namespace sat {
if (!canceled) {
rlimit().reset_cancel();
}
par.reset();
set_par(nullptr, 0);
ls.reset();
uw.reset();