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abstract solver API

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-02-06 19:42:01 +01:00
parent 9cf99e26a6
commit d04e72819a
11 changed files with 237 additions and 110 deletions
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63
src/sat/tactic/goal2sat.cpp
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@ -57,7 +57,7 @@ struct goal2sat::imp {
svector<sat::literal> m_result_stack;
obj_map<app, sat::literal> m_cache;
obj_hashtable<expr> m_interface_vars;
sat::solver & m_solver;
sat::solver_core & m_solver;
atom2bool_var & m_map;
dep2asm_map & m_dep2asm;
sat::bool_var m_true;
@ -69,7 +69,7 @@ struct goal2sat::imp {
bool m_xor_solver;
bool m_is_lemma;
imp(ast_manager & _m, params_ref const & p, sat::solver & s, atom2bool_var & map, dep2asm_map& dep2asm, bool default_external):
imp(ast_manager & _m, params_ref const & p, sat::solver_core & s, atom2bool_var & map, dep2asm_map& dep2asm, bool default_external):
m(_m),
pb(m),
m_ext(nullptr),
@ -97,30 +97,30 @@ struct goal2sat::imp {
void mk_clause(sat::literal l) {
TRACE("goal2sat", tout << "mk_clause: " << l << "\n";);
m_solver.mk_clause(1, &l);
m_solver.add_clause(1, &l, false);
}
void set_lemma_mode(bool f) { m_is_lemma = f; }
void mk_clause(sat::literal l1, sat::literal l2) {
TRACE("goal2sat", tout << "mk_clause: " << l1 << " " << l2 << "\n";);
m_solver.mk_clause(l1, l2, m_is_lemma);
m_solver.add_clause(l1, l2, m_is_lemma);
}
void mk_clause(sat::literal l1, sat::literal l2, sat::literal l3) {
TRACE("goal2sat", tout << "mk_clause: " << l1 << " " << l2 << " " << l3 << "\n";);
m_solver.mk_clause(l1, l2, l3, m_is_lemma);
m_solver.add_clause(l1, l2, l3, m_is_lemma);
}
void mk_clause(unsigned num, sat::literal * lits) {
TRACE("goal2sat", tout << "mk_clause: "; for (unsigned i = 0; i < num; i++) tout << lits[i] << " "; tout << "\n";);
m_solver.mk_clause(num, lits, m_is_lemma);
m_solver.add_clause(num, lits, m_is_lemma);
}
sat::bool_var mk_true() {
if (m_true == sat::null_bool_var) {
// create fake variable to represent true;
m_true = m_solver.mk_var(false);
m_true = m_solver.add_var(false);
mk_clause(sat::literal(m_true, false)); // v is true
}
return m_true;
@ -139,7 +139,7 @@ struct goal2sat::imp {
}
else {
bool ext = m_default_external || !is_uninterp_const(t) || m_interface_vars.contains(t);
sat::bool_var v = m_solver.mk_var(ext);
sat::bool_var v = m_solver.add_var(ext);
m_map.insert(t, v);
l = sat::literal(v, sign);
TRACE("sat", tout << "new_var: " << v << ": " << mk_ismt2_pp(t, m) << "\n";);
@ -247,7 +247,7 @@ struct goal2sat::imp {
}
else {
SASSERT(num <= m_result_stack.size());
sat::bool_var k = m_solver.mk_var();
sat::bool_var k = m_solver.add_var(false);
sat::literal l(k, false);
m_cache.insert(t, l);
sat::literal * lits = m_result_stack.end() - num;
@ -286,7 +286,7 @@ struct goal2sat::imp {
}
else {
SASSERT(num <= m_result_stack.size());
sat::bool_var k = m_solver.mk_var();
sat::bool_var k = m_solver.add_var(false);
sat::literal l(k, false);
m_cache.insert(t, l);
// l => /\ lits
@ -329,7 +329,7 @@ struct goal2sat::imp {
m_result_stack.reset();
}
else {
sat::bool_var k = m_solver.mk_var();
sat::bool_var k = m_solver.add_var(false);
sat::literal l(k, false);
m_cache.insert(n, l);
mk_clause(~l, ~c, t);
@ -366,7 +366,7 @@ struct goal2sat::imp {
m_result_stack.reset();
}
else {
sat::bool_var k = m_solver.mk_var();
sat::bool_var k = m_solver.add_var(false);
sat::literal l(k, false);
m_cache.insert(t, l);
mk_clause(~l, l1, ~l2);
@ -390,7 +390,7 @@ struct goal2sat::imp {
return;
}
sat::literal_vector lits;
sat::bool_var v = m_solver.mk_var(true);
sat::bool_var v = m_solver.add_var(true);
lits.push_back(sat::literal(v, true));
convert_pb_args(num, lits);
// ensure that = is converted to xor
@ -472,7 +472,7 @@ struct goal2sat::imp {
m_ext->add_pb_ge(sat::null_bool_var, wlits, k1);
}
else {
sat::bool_var v = m_solver.mk_var(true);
sat::bool_var v = m_solver.add_var(true);
sat::literal lit(v, sign);
m_ext->add_pb_ge(v, wlits, k.get_unsigned());
TRACE("goal2sat", tout << "root: " << root << " lit: " << lit << "\n";);
@ -503,7 +503,7 @@ struct goal2sat::imp {
m_ext->add_pb_ge(sat::null_bool_var, wlits, k1);
}
else {
sat::bool_var v = m_solver.mk_var(true);
sat::bool_var v = m_solver.add_var(true);
sat::literal lit(v, sign);
m_ext->add_pb_ge(v, wlits, k.get_unsigned());
TRACE("goal2sat", tout << "root: " << root << " lit: " << lit << "\n";);
@ -518,8 +518,8 @@ struct goal2sat::imp {
svector<wliteral> wlits;
convert_pb_args(t, wlits);
bool base_assert = (root && !sign && m_solver.num_user_scopes() == 0);
sat::bool_var v1 = base_assert ? sat::null_bool_var : m_solver.mk_var(true);
sat::bool_var v2 = base_assert ? sat::null_bool_var : m_solver.mk_var(true);
sat::bool_var v1 = base_assert ? sat::null_bool_var : m_solver.add_var(true);
sat::bool_var v2 = base_assert ? sat::null_bool_var : m_solver.add_var(true);
m_ext->add_pb_ge(v1, wlits, k.get_unsigned());
k.neg();
for (wliteral& wl : wlits) {
@ -533,7 +533,7 @@ struct goal2sat::imp {
}
else {
sat::literal l1(v1, false), l2(v2, false);
sat::bool_var v = m_solver.mk_var();
sat::bool_var v = m_solver.add_var(false);
sat::literal l(v, false);
mk_clause(~l, l1);
mk_clause(~l, l2);
@ -553,7 +553,7 @@ struct goal2sat::imp {
m_ext->add_at_least(sat::null_bool_var, lits, k.get_unsigned());
}
else {
sat::bool_var v = m_solver.mk_var(true);
sat::bool_var v = m_solver.add_var(true);
sat::literal lit(v, false);
m_ext->add_at_least(v, lits, k.get_unsigned());
m_cache.insert(t, lit);
@ -575,7 +575,7 @@ struct goal2sat::imp {
m_ext->add_at_least(sat::null_bool_var, lits, lits.size() - k.get_unsigned());
}
else {
sat::bool_var v = m_solver.mk_var(true);
sat::bool_var v = m_solver.add_var(true);
sat::literal lit(v, false);
m_ext->add_at_least(v, lits, lits.size() - k.get_unsigned());
m_cache.insert(t, lit);
@ -588,8 +588,8 @@ struct goal2sat::imp {
SASSERT(k.is_unsigned());
sat::literal_vector lits;
convert_pb_args(t->get_num_args(), lits);
sat::bool_var v1 = (root && !sign) ? sat::null_bool_var : m_solver.mk_var(true);
sat::bool_var v2 = (root && !sign) ? sat::null_bool_var : m_solver.mk_var(true);
sat::bool_var v1 = (root && !sign) ? sat::null_bool_var : m_solver.add_var(true);
sat::bool_var v2 = (root && !sign) ? sat::null_bool_var : m_solver.add_var(true);
m_ext->add_at_least(v1, lits, k.get_unsigned());
for (sat::literal& l : lits) {
l.neg();
@ -602,7 +602,7 @@ struct goal2sat::imp {
}
else {
sat::literal l1(v1, false), l2(v2, false);
sat::bool_var v = m_solver.mk_var();
sat::bool_var v = m_solver.add_var(false);
sat::literal l(v, false);
mk_clause(~l, l1);
mk_clause(~l, l2);
@ -897,7 +897,7 @@ struct goal2sat::scoped_set_imp {
};
void goal2sat::operator()(goal const & g, params_ref const & p, sat::solver & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external, bool is_lemma) {
void goal2sat::operator()(goal const & g, params_ref const & p, sat::solver_core & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external, bool is_lemma) {
imp proc(g.m(), p, t, m, dep2asm, default_external);
scoped_set_imp set(this, &proc);
proc.set_lemma_mode(is_lemma);
@ -916,7 +916,7 @@ void goal2sat::get_interpreted_atoms(expr_ref_vector& atoms) {
sat2goal::mc::mc(ast_manager& m): m(m), m_var2expr(m) {}
void sat2goal::mc::flush_smc(sat::solver& s, atom2bool_var const& map) {
void sat2goal::mc::flush_smc(sat::solver_core& s, atom2bool_var const& map) {
s.flush(m_smc);
m_var2expr.resize(s.num_vars());
map.mk_var_inv(m_var2expr);
@ -1157,13 +1157,14 @@ struct sat2goal::imp {
r.assert_expr(fml);
}
void assert_clauses(ref<mc>& mc, sat::solver const & s, sat::clause_vector const& clauses, goal & r, bool asserted) {
void assert_clauses(ref<mc>& mc, sat::solver_core const & s, sat::clause_vector const& clauses, goal & r, bool asserted) {
ptr_buffer<expr> lits;
unsigned small_lbd = 3; // s.get_config().m_gc_small_lbd;
for (sat::clause* cp : clauses) {
checkpoint();
lits.reset();
sat::clause const & c = *cp;
if (asserted || m_learned || c.glue() <= s.get_config().m_gc_small_lbd) {
if (asserted || m_learned || c.glue() <= small_lbd) {
for (sat::literal l : c) {
lits.push_back(lit2expr(mc, l));
}
@ -1172,11 +1173,11 @@ struct sat2goal::imp {
}
}
sat::ba_solver* get_ba_solver(sat::solver const& s) {
sat::ba_solver* get_ba_solver(sat::solver_core const& s) {
return dynamic_cast<sat::ba_solver*>(s.get_extension());
}
void operator()(sat::solver & s, atom2bool_var const & map, goal & r, ref<mc> & mc) {
void operator()(sat::solver_core & s, atom2bool_var const & map, goal & r, ref<mc> & mc) {
if (s.at_base_lvl() && s.inconsistent()) {
r.assert_expr(m.mk_false());
return;
@ -1196,7 +1197,7 @@ struct sat2goal::imp {
// collect binary clauses
svector<sat::solver::bin_clause> bin_clauses;
s.collect_bin_clauses(bin_clauses, m_learned);
s.collect_bin_clauses(bin_clauses, m_learned, false);
for (sat::solver::bin_clause const& bc : bin_clauses) {
checkpoint();
r.assert_expr(m.mk_or(lit2expr(mc, bc.first), lit2expr(mc, bc.second)));
@ -1262,7 +1263,7 @@ struct sat2goal::scoped_set_imp {
}
};
void sat2goal::operator()(sat::solver & t, atom2bool_var const & m, params_ref const & p,
void sat2goal::operator()(sat::solver_core & t, atom2bool_var const & m, params_ref const & p,
goal & g, ref<mc> & mc) {
imp proc(g.m(), p);
scoped_set_imp set(this, &proc);