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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-08-28 13:41:50 -07:00
parent 86c11b9349
commit 93ee2a68a4
7 changed files with 60 additions and 33 deletions
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2
src/sat/sat_solver.h
View file

@ -454,7 +454,7 @@ namespace sat {
void display_lookahead_scores(std::ostream& out);
stats const& stats() const { return m_stats; }
stats const& get_stats() const { return m_stats; }
protected:

67
src/sat/sat_solver/inc_sat_solver.cpp
View file

@ -40,6 +40,7 @@ Notes:
#include "model/model_evaluator.h"
#include "sat/sat_solver.h"
#include "sat/sat_params.hpp"
#include "sat/smt/euf_solver.h"
#include "sat/tactic/goal2sat.h"
#include "sat/tactic/sat_tactic.h"
#include "sat/sat_simplifier_params.hpp"
@ -80,6 +81,8 @@ class inc_sat_solver : public solver {
typedef obj_map<expr, sat::literal> dep2asm_t;
dep2asm_t m_dep2asm;
bool is_internalized() const { return m_fmls_head == m_fmls.size(); }
public:
inc_sat_solver(ast_manager& m, params_ref const& p, bool incremental_mode):
@ -120,7 +123,15 @@ public:
ast_translation tr(m, dst_m);
m_solver.pop_to_base_level();
inc_sat_solver* result = alloc(inc_sat_solver, dst_m, p, is_incremental());
result->m_solver.copy(m_solver);
auto* ext = dynamic_cast<euf::solver*>(m_solver.get_extension());
if (ext) {
auto& si = result->m_goal2sat.si(dst_m, m_params, result->m_solver, result->m_map, result->m_dep2asm, is_incremental());
euf::solver::scoped_set_translate st(*ext, tr, result->m_map, si);
result->m_solver.copy(m_solver);
}
else {
result->m_solver.copy(m_solver);
}
result->m_fmls_head = m_fmls_head;
for (expr* f : m_fmls) result->m_fmls.push_back(tr(f));
for (expr* f : m_asmsf) result->m_asmsf.push_back(tr(f));
@ -145,7 +156,7 @@ public:
}
init_preprocess();
m_solver.pop_to_base_level();
dep2asm_t dep2asm;
m_dep2asm.reset();
expr_ref_vector asms(m);
for (unsigned i = 0; i < sz; ++i) {
expr_ref a(m.mk_fresh_const("s", m.mk_bool_sort()), m);
@ -154,7 +165,7 @@ public:
asms.push_back(a);
}
VERIFY(l_true == internalize_formulas());
VERIFY(l_true == internalize_assumptions(sz, asms.c_ptr(), dep2asm));
VERIFY(l_true == internalize_assumptions(sz, asms.c_ptr()));
svector<unsigned> nweights;
for (unsigned i = 0; i < m_asms.size(); ++i) {
nweights.push_back((unsigned) m_weights[i]);
@ -190,10 +201,10 @@ public:
}
TRACE("sat", tout << _assumptions << "\n";);
dep2asm_t dep2asm;
m_dep2asm.reset();
lbool r = internalize_formulas();
if (r != l_true) return r;
r = internalize_assumptions(sz, _assumptions.c_ptr(), dep2asm);
r = internalize_assumptions(sz, _assumptions.c_ptr());
if (r != l_true) return r;
init_reason_unknown();
@ -216,13 +227,13 @@ public:
r = l_undef;
}
else if (sz > 0) {
check_assumptions(dep2asm);
check_assumptions();
}
break;
case l_false:
// TBD: expr_dependency core is not accounted for.
if (!m_asms.empty()) {
extract_core(dep2asm, asm2fml);
extract_core(asm2fml);
}
break;
default:
@ -438,19 +449,19 @@ public:
sat::literal_vector asms;
sat::bool_var_vector bvars;
vector<sat::literal_vector> lconseq;
dep2asm_t dep2asm;
m_dep2asm.reset();
obj_map<expr, expr*> asm2fml;
m_solver.pop_to_base_level();
lbool r = internalize_formulas();
if (r != l_true) return r;
r = internalize_vars(vars, bvars);
if (r != l_true) return r;
r = internalize_assumptions(assumptions.size(), assumptions.c_ptr(), dep2asm);
r = internalize_assumptions(assumptions.size(), assumptions.c_ptr());
if (r != l_true) return r;
r = m_solver.get_consequences(m_asms, bvars, lconseq);
if (r == l_false) {
if (!m_asms.empty()) {
extract_core(dep2asm, asm2fml);
extract_core(asm2fml);
}
return r;
}
@ -465,10 +476,10 @@ public:
// extract original fixed variables
u_map<expr*> asm2dep;
extract_asm2dep(dep2asm, asm2dep);
extract_asm2dep(asm2dep);
for (auto v : vars) {
expr_ref cons(m);
if (extract_fixed_variable(dep2asm, asm2dep, v, bool_var2conseq, lconseq, cons)) {
if (extract_fixed_variable(asm2dep, v, bool_var2conseq, lconseq, cons)) {
conseq.push_back(cons);
}
}
@ -615,7 +626,7 @@ public:
private:
lbool internalize_goal(goal_ref& g, dep2asm_t& dep2asm) {
lbool internalize_goal(goal_ref& g) {
m_solver.pop_to_base_level();
if (m_solver.inconsistent())
return l_false;
@ -662,7 +673,7 @@ private:
// ensure that if goal is already internalized, then import mc from m_solver.
m_goal2sat(*g, m_params, m_solver, m_map, dep2asm, is_incremental());
m_goal2sat(*g, m_params, m_solver, m_map, m_dep2asm, is_incremental());
m_goal2sat.get_interpreted_atoms(atoms);
if (!m_sat_mc) m_sat_mc = alloc(sat2goal::mc, m);
m_sat_mc->flush_smc(m_solver, m_map);
@ -678,7 +689,7 @@ private:
return l_true;
}
lbool internalize_assumptions(unsigned sz, expr* const* asms, dep2asm_t& dep2asm) {
lbool internalize_assumptions(unsigned sz, expr* const* asms) {
if (sz == 0 && get_num_assumptions() == 0) {
m_asms.shrink(0);
return l_true;
@ -690,9 +701,9 @@ private:
for (unsigned i = 0; i < get_num_assumptions(); ++i) {
g->assert_expr(get_assumption(i), m.mk_leaf(get_assumption(i)));
}
lbool res = internalize_goal(g, dep2asm);
lbool res = internalize_goal(g);
if (res == l_true) {
extract_assumptions(sz, asms, dep2asm);
extract_assumptions(sz, asms);
}
return res;
}
@ -741,7 +752,7 @@ private:
return internalized;
}
bool extract_fixed_variable(dep2asm_t& dep2asm, u_map<expr*>& asm2dep, expr* v, u_map<unsigned> const& bool_var2conseq, vector<sat::literal_vector> const& lconseq, expr_ref& conseq) {
bool extract_fixed_variable(u_map<expr*>& asm2dep, expr* v, u_map<unsigned> const& bool_var2conseq, vector<sat::literal_vector> const& lconseq, expr_ref& conseq) {
sat::bool_var_vector bvars;
if (!internalize_var(v, bvars)) {
@ -831,7 +842,7 @@ private:
expr* fml = m_fmls.get(i);
g->assert_expr(fml);
}
lbool res = internalize_goal(g, dep2asm);
lbool res = internalize_goal(g);
if (res != l_undef) {
m_fmls_head = m_fmls.size();
}
@ -839,13 +850,13 @@ private:
return res;
}
void extract_assumptions(unsigned sz, expr* const* asms, dep2asm_t& dep2asm) {
void extract_assumptions(unsigned sz, expr* const* asms) {
m_asms.reset();
unsigned j = 0;
sat::literal lit;
sat::literal_set seen;
for (unsigned i = 0; i < sz; ++i) {
if (dep2asm.find(asms[i], lit)) {
if (m_dep2asm.find(asms[i], lit)) {
SASSERT(lit.var() <= m_solver.num_vars());
if (!seen.contains(lit)) {
m_asms.push_back(lit);
@ -858,7 +869,7 @@ private:
}
}
for (unsigned i = 0; i < get_num_assumptions(); ++i) {
if (dep2asm.find(get_assumption(i), lit)) {
if (m_dep2asm.find(get_assumption(i), lit)) {
SASSERT(lit.var() <= m_solver.num_vars());
if (!seen.contains(lit)) {
m_asms.push_back(lit);
@ -875,15 +886,15 @@ private:
SASSERT(dep2asm.size() == m_asms.size());
}
void extract_asm2dep(dep2asm_t const& dep2asm, u_map<expr*>& asm2dep) {
for (auto const& kv : dep2asm) {
void extract_asm2dep(u_map<expr*>& asm2dep) {
for (auto const& kv : m_dep2asm) {
asm2dep.insert(kv.m_value.index(), kv.m_key);
}
}
void extract_core(dep2asm_t& dep2asm, obj_map<expr, expr*> const& asm2fml) {
void extract_core(obj_map<expr, expr*> const& asm2fml) {
u_map<expr*> asm2dep;
extract_asm2dep(dep2asm, asm2dep);
extract_asm2dep(asm2dep);
sat::literal_vector const& core = m_solver.get_core();
TRACE("sat",
for (auto kv : dep2asm) {
@ -908,9 +919,9 @@ private:
}
}
void check_assumptions(dep2asm_t& dep2asm) {
void check_assumptions() {
sat::model const & ll_m = m_solver.get_model();
for (auto const& kv : dep2asm) {
for (auto const& kv : m_dep2asm) {
sat::literal lit = kv.m_value;
if (sat::value_at(lit, ll_m) != l_true) {
IF_VERBOSE(0, verbose_stream() << mk_pp(kv.m_key, m) << " does not evaluate to true\n";

2
src/sat/smt/euf_ackerman.cpp
View file

@ -169,7 +169,7 @@ namespace euf {
SASSERT(s.s().at_base_lvl());
auto* n = m_queue;
inference* k = nullptr;
unsigned num_prop = static_cast<unsigned>(s.s().stats().m_conflict * s.m_config.m_dack_factor);
unsigned num_prop = static_cast<unsigned>(s.s().get_stats().m_conflict * s.m_config.m_dack_factor);
num_prop = std::min(num_prop, m_table.size());
for (unsigned i = 0; i < num_prop; ++i, n = k) {
k = n->m_next;

3
src/sat/smt/euf_solver.cpp
View file

@ -264,7 +264,8 @@ namespace euf {
solver* solver::copy_core() {
ast_manager& to = m_translate ? m_translate->to() : m;
atom2bool_var& a2b = m_translate_expr2var ? *m_translate_expr2var : m_expr2var;
auto* r = alloc(solver, to, a2b, si);
sat::sat_internalizer& to_si = m_translate_si ? *m_translate_si : si;
auto* r = alloc(solver, to, a2b, to_si);
r->m_config = m_config;
std::function<void*(void*)> copy_justification = [&](void* x) { return (void*)(r->base_ptr() + ((unsigned*)x - base_ptr())); };
r->m_egraph.copy_from(m_egraph, copy_justification);

10
src/sat/smt/euf_solver.h
View file

@ -62,6 +62,7 @@ namespace euf {
sat::lookahead* m_lookahead { nullptr };
ast_translation* m_translate { nullptr };
atom2bool_var* m_translate_expr2var { nullptr };
sat::sat_internalizer* m_translate_si{ nullptr };
scoped_ptr<ackerman> m_ackerman;
euf::enode* m_true { nullptr };
@ -137,8 +138,13 @@ namespace euf {
void set_lookahead(sat::lookahead* s) override { m_lookahead = s; }
struct scoped_set_translate {
solver& s;
scoped_set_translate(solver& s, ast_translation& t, atom2bool_var& a2b):s(s) { s.m_translate = &t; s.m_translate_expr2var = &a2b; }
~scoped_set_translate() { s.m_translate = nullptr; s. m_translate_expr2var = nullptr; }
scoped_set_translate(solver& s, ast_translation& t, atom2bool_var& a2b, sat::sat_internalizer& si) :
s(s) {
s.m_translate = &t;
s.m_translate_expr2var = &a2b;
s.m_translate_si = &si;
}
~scoped_set_translate() { s.m_translate = nullptr; s.m_translate_expr2var = nullptr; s.m_translate_si = nullptr; }
};
double get_reward(literal l, ext_constraint_idx idx, sat::literal_occs_fun& occs) const override { return 0; }
bool is_extended_binary(ext_justification_idx idx, literal_vector & r) override { return false; }

7
src/sat/tactic/goal2sat.cpp
View file

@ -770,6 +770,13 @@ bool goal2sat::has_interpreted_atoms() const {
}
sat::sat_internalizer& goal2sat::si(ast_manager& m, params_ref const& p, sat::solver_core& t, atom2bool_var& a2b, dep2asm_map& dep2asm, bool default_external) {
if (!m_imp)
m_imp = alloc(imp, m, p, t, a2b, dep2asm, default_external);
return *m_imp;
}
sat2goal::mc::mc(ast_manager& m): m(m), m_var2expr(m) {}

2
src/sat/tactic/goal2sat.h
View file

@ -66,6 +66,8 @@ public:
bool has_interpreted_atoms() const;
sat::sat_internalizer& si(ast_manager& m, params_ref const& p, sat::solver_core& t, atom2bool_var& a2b, dep2asm_map& dep2asm, bool default_external = false);
};