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prepare for inverse model conversion for formulas

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-11-17 19:55:23 -08:00
parent dc0b2a8acf
commit b3bd9b89b5
7 changed files with 79 additions and 139 deletions
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15
src/sat/tactic/goal2sat.cpp
View file

@ -881,8 +881,9 @@ struct sat2goal::imp {
// Wrapper for sat::model_converter: converts it into an "AST level" model_converter.
class sat_model_converter : public model_converter {
sat::model_converter m_mc;
expr_ref_vector m_var2expr;
model_converter_ref m_cached_mc;
sat::model_converter m_mc;
expr_ref_vector m_var2expr;
generic_model_converter_ref m_fmc; // filter for eliminating fresh variables introduced in the assertion-set --> sat conversion
sat_model_converter(ast_manager & m):
@ -1025,6 +1026,9 @@ struct sat2goal::imp {
if (m_fmc) m_fmc->collect(visitor);
}
void operator()(expr_ref& formula) override {
NOT_IMPLEMENTED_YET();
}
};
typedef ref<sat_model_converter> sat_model_converter_ref;
@ -1033,7 +1037,6 @@ struct sat2goal::imp {
expr_ref_vector m_lit2expr;
unsigned long long m_max_memory;
bool m_learned;
unsigned m_glue;
imp(ast_manager & _m, params_ref const & p):m(_m), m_lit2expr(m) {
updt_params(p);
@ -1041,7 +1044,6 @@ struct sat2goal::imp {
void updt_params(params_ref const & p) {
m_learned = p.get_bool("learned", false);
m_glue = p.get_uint("glue", UINT_MAX);
m_max_memory = megabytes_to_bytes(p.get_uint("max_memory", UINT_MAX));
}
@ -1131,7 +1133,6 @@ struct sat2goal::imp {
checkpoint();
lits.reset();
sat::clause const & c = *cp;
unsigned sz = c.size();
if (asserted || m_learned || c.glue() <= s.get_config().m_gc_small_lbd) {
for (sat::literal l : c) {
lits.push_back(lit2expr(mc, l));
@ -1142,8 +1143,7 @@ struct sat2goal::imp {
}
sat::ba_solver* get_ba_solver(sat::solver const& s) {
sat::extension* ext = s.get_extension();
return dynamic_cast<sat::ba_solver*>(ext);
return dynamic_cast<sat::ba_solver*>(s.get_extension());
}
void operator()(sat::solver const & s, atom2bool_var const & map, goal & r, model_converter_ref & mc) {
@ -1229,7 +1229,6 @@ sat2goal::sat2goal():m_imp(0) {
void sat2goal::collect_param_descrs(param_descrs & r) {
insert_max_memory(r);
r.insert("learned", CPK_BOOL, "(default: false) collect also learned clauses.");
r.insert("glue", CPK_UINT, "(default: max-int) collect learned clauses with glue level below parameter.");
}
struct sat2goal::scoped_set_imp {

13
src/solver/solver.cpp
View file

@ -185,21 +185,20 @@ bool solver::is_literal(ast_manager& m, expr* e) {
void solver::assert_expr(expr* f) {
expr_ref fml(f, get_manager());
if (mc0()) {
(*mc0())(fml);
model_converter_ref mc = get_model_converter();
if (mc) {
(*mc)(fml);
}
assert_expr_core(fml);
}
void solver::assert_expr(expr* f, expr* t) {
// let mc0 be the model converter associated with the solver
// that converts models to their "real state".
ast_manager& m = get_manager();
expr_ref fml(f, m);
expr_ref a(t, m);
if (mc0()) {
(*mc0())(fml);
model_converter_ref mc = get_model_converter();
if (mc) {
(*mc)(fml);
// (*mc0())(a);
}
assert_expr_core(fml, a);

31
src/tactic/bv/bit_blaster_model_converter.cpp
View file

@ -21,6 +21,7 @@ Notes:
#include "tactic/model_converter.h"
#include "ast/bv_decl_plugin.h"
#include "ast/ast_smt2_pp.h"
#include "ast/ast_util.h"
/**
If TO_BOOL == true, then bit-vectors of size n were blasted into n-tuples of Booleans.
@ -171,7 +172,7 @@ struct bit_blaster_model_converter : public model_converter {
return result;
}
virtual void operator()(model_ref & md, unsigned goal_idx) {
void operator()(model_ref & md, unsigned goal_idx) override {
SASSERT(goal_idx == 0);
model * new_model = alloc(model, m());
obj_hashtable<func_decl> bits;
@ -181,11 +182,29 @@ struct bit_blaster_model_converter : public model_converter {
md = new_model;
}
virtual void operator()(model_ref & md) {
void operator()(model_ref & md) override {
operator()(md, 0);
}
/**
\brief simplisic expansion operator for formulas.
It just adds back bit-vector definitions to the formula whether they are used or not.
*/
void operator()(expr_ref& fml) override {
unsigned sz = m_vars.size();
if (sz == 0) return;
expr_ref_vector fmls(m());
fmls.push_back(fml);
for (unsigned i = 0; i < sz; i++) {
fmls.push_back(m().mk_eq(m().mk_const(m_vars.get(i)), m_bits.get(i)));
}
m_vars.reset();
m_bits.reset();
fml = mk_and(fmls);
}
virtual void display(std::ostream & out) {
void display(std::ostream & out) override {
unsigned sz = m_vars.size();
for (unsigned i = 0; i < sz; i++) {
display_add(out, m(), m_vars.get(i), m_bits.get(i));
@ -196,7 +215,7 @@ protected:
bit_blaster_model_converter(ast_manager & m):m_vars(m), m_bits(m) { }
public:
virtual model_converter * translate(ast_translation & translator) {
model_converter * translate(ast_translation & translator) override {
bit_blaster_model_converter * res = alloc(bit_blaster_model_converter, translator.to());
for (func_decl * v : m_vars)
res->m_vars.push_back(translator(v));
@ -207,11 +226,11 @@ public:
};
model_converter * mk_bit_blaster_model_converter(ast_manager & m, obj_map<func_decl, expr*> const & const2bits) {
return alloc(bit_blaster_model_converter<true>, m, const2bits);
return const2bits.empty() ? nullptr : alloc(bit_blaster_model_converter<true>, m, const2bits);
}
model_converter * mk_bv1_blaster_model_converter(ast_manager & m, obj_map<func_decl, expr*> const & const2bits) {
return alloc(bit_blaster_model_converter<false>, m, const2bits);
return const2bits.empty() ? nullptr : alloc(bit_blaster_model_converter<false>, m, const2bits);
}

94
src/tactic/extension_model_converter.cpp
View file

@ -1,94 +0,0 @@
/*++
Copyright (c) 2011 Microsoft Corporation
Module Name:
extension_model_converter.cpp
Abstract:
Model converter that introduces eliminated variables in a model.
Author:
Leonardo (leonardo) 2011-10-21
Notes:
--*/
#include "ast/ast_pp.h"
#include "ast/ast_smt2_pp.h"
#include "model/model_evaluator.h"
#include "model/model_v2_pp.h"
#include "tactic/extension_model_converter.h"
extension_model_converter::~extension_model_converter() {
}
#ifdef _TRACE
static void display_decls_info(std::ostream & out, model_ref & md) {
ast_manager & m = md->get_manager();
unsigned sz = md->get_num_decls();
for (unsigned i = 0; i < sz; i++) {
func_decl * d = md->get_decl(i);
out << d->get_name();
out << " (";
for (unsigned j = 0; j < d->get_arity(); j++)
out << mk_pp(d->get_domain(j), m);
out << mk_pp(d->get_range(), m);
out << ") ";
if (d->get_info())
out << *(d->get_info());
out << " :id " << d->get_id() << "\n";
}
}
#endif
void extension_model_converter::operator()(model_ref & md, unsigned goal_idx) {
SASSERT(goal_idx == 0);
TRACE("extension_mc", model_v2_pp(tout, *md); display_decls_info(tout, md););
model_evaluator ev(*(md.get()));
ev.set_model_completion(true);
ev.set_expand_array_equalities(false);
expr_ref val(m());
unsigned i = m_vars.size();
while (i > 0) {
--i;
expr * def = m_defs.get(i);
ev(def, val);
TRACE("extension_mc", tout << m_vars.get(i)->get_name() << " ->\n" << mk_ismt2_pp(def, m()) << "\n==>\n" << mk_ismt2_pp(val, m()) << "\n";);
func_decl * f = m_vars.get(i);
unsigned arity = f->get_arity();
if (arity == 0) {
md->register_decl(f, val);
}
else {
func_interp * new_fi = alloc(func_interp, m(), arity);
new_fi->set_else(val);
md->register_decl(f, new_fi);
}
}
TRACE("extension_mc", model_v2_pp(tout, *md); display_decls_info(tout, md););
}
void extension_model_converter::insert(func_decl * v, expr * def) {
m_vars.push_back(v);
m_defs.push_back(def);
}
void extension_model_converter::display(std::ostream & out) {
for (unsigned i = 0; i < m_vars.size(); i++) {
display_add(out, m(), m_vars.get(i), m_defs.get(i));
}
}
model_converter * extension_model_converter::translate(ast_translation & translator) {
extension_model_converter * res = alloc(extension_model_converter, translator.to());
for (func_decl* v : m_vars)
res->m_vars.push_back(translator(v));
for (expr* d : m_defs)
res->m_defs.push_back(translator(d));
return res;
}

8
src/tactic/horn_subsume_model_converter.cpp
View file

@ -170,6 +170,10 @@ void horn_subsume_model_converter::add_default_false_interpretation(expr* e, mod
}
void horn_subsume_model_converter::operator()(expr_ref& fml) {
NOT_IMPLEMENTED_YET();
}
void horn_subsume_model_converter::operator()(model_ref& mr) {
func_decl_ref pred(m);
@ -190,11 +194,11 @@ void horn_subsume_model_converter::operator()(model_ref& mr) {
add_default_false_interpretation(body, mr);
SASSERT(m.is_bool(body));
TRACE("mc", tout << "eval: " << h->get_name() << "\n" << mk_pp(body, m) << "\n";);
TRACE("mc", tout << "eval: " << h->get_name() << "\n" << body << "\n";);
expr_ref tmp(body);
mr->eval(tmp, body);
TRACE("mc", tout << "to:\n" << mk_pp(body, m) << "\n";);
TRACE("mc", tout << "to:\n" << body << "\n";);
if (arity == 0) {
expr* e = mr->get_const_interp(h);

13
src/tactic/horn_subsume_model_converter.h
View file

@ -58,9 +58,8 @@ class horn_subsume_model_converter : public model_converter {
public:
horn_subsume_model_converter(ast_manager& m):
m(m), m_funcs(m), m_bodies(m), m_rewrite(m),
m_delay_head(m), m_delay_body(m) {}
horn_subsume_model_converter(ast_manager& m):
m(m), m_funcs(m), m_bodies(m), m_rewrite(m), m_delay_head(m), m_delay_body(m) {}
bool mk_horn(expr* clause, func_decl_ref& pred, expr_ref& body);
@ -72,13 +71,15 @@ public:
void insert(func_decl* p, expr* body) { m_funcs.push_back(p); m_bodies.push_back(body); }
virtual void operator()(model_ref& _m);
void operator()(model_ref& _m) override;
virtual model_converter * translate(ast_translation & translator);
void operator()(expr_ref& fml) override;
model_converter * translate(ast_translation & translator) override;
ast_manager& get_manager() { return m; }
virtual void display(std::ostream & out) {}
void display(std::ostream & out) override {}
};
#endif

44
src/tactic/model_converter.cpp
View file

@ -58,28 +58,33 @@ public:
VERIFY(m_c1 && m_c2);
}
virtual void operator()(model_ref & m) {
void operator()(model_ref & m) override {
this->m_c2->operator()(m);
this->m_c1->operator()(m);
}
virtual void operator()(model_ref & m, unsigned goal_idx) {
void operator()(expr_ref & fml) override {
this->m_c1->operator()(fml);
this->m_c2->operator()(fml);
}
void operator()(model_ref & m, unsigned goal_idx) override {
this->m_c2->operator()(m, goal_idx);
this->m_c1->operator()(m, 0);
}
virtual void operator()(labels_vec & r, unsigned goal_idx) {
void operator()(labels_vec & r, unsigned goal_idx) override {
this->m_c2->operator()(r, goal_idx);
this->m_c1->operator()(r, 0);
}
virtual char const * get_name() const { return "concat-model-converter"; }
char const * get_name() const override { return "concat-model-converter"; }
virtual model_converter * translate(ast_translation & translator) {
model_converter * translate(ast_translation & translator) override {
return this->translate_core<concat_model_converter>(translator);
}
virtual void collect(ast_pp_util& visitor) {
void collect(ast_pp_util& visitor) override {
this->m_c1->collect(visitor);
this->m_c2->collect(visitor);
}
@ -99,12 +104,12 @@ public:
concat_star_converter<model_converter>(mc1, num, mc2s, szs) {
}
virtual void operator()(model_ref & m) {
void operator()(model_ref & m) override {
// TODO: delete method after conversion is complete
UNREACHABLE();
}
virtual void operator()(model_ref & m, unsigned goal_idx) {
void operator()(model_ref & m, unsigned goal_idx) override {
unsigned num = this->m_c2s.size();
for (unsigned i = 0; i < num; i++) {
if (goal_idx < this->m_szs[i]) {
@ -122,7 +127,7 @@ public:
UNREACHABLE();
}
virtual void operator()(labels_vec & r, unsigned goal_idx) {
void operator()(labels_vec & r, unsigned goal_idx) override {
unsigned num = this->m_c2s.size();
for (unsigned i = 0; i < num; i++) {
if (goal_idx < this->m_szs[i]) {
@ -140,9 +145,9 @@ public:
UNREACHABLE();
}
virtual char const * get_name() const { return "concat-star-model-converter"; }
char const * get_name() const override { return "concat-star-model-converter"; }
virtual model_converter * translate(ast_translation & translator) {
model_converter * translate(ast_translation & translator) override {
return this->translate_core<concat_star_model_converter>(translator);
}
};
@ -173,22 +178,28 @@ public:
virtual ~model2mc() {}
virtual void operator()(model_ref & m) {
void operator()(model_ref & m) override {
m = m_model;
}
virtual void operator()(model_ref & m, unsigned goal_idx) {
void operator()(model_ref & m, unsigned goal_idx) override {
m = m_model;
}
virtual void operator()(labels_vec & r, unsigned goal_idx) {
void operator()(labels_vec & r, unsigned goal_idx) {
r.append(m_labels.size(), m_labels.c_ptr());
}
virtual void cancel() {
void operator()(expr_ref& fml) override {
expr_ref r(m_model->get_manager());
m_model->eval(fml, r, false);
fml = r;
}
void cancel() override {
}
virtual void display(std::ostream & out) {
void display(std::ostream & out) override {
out << "(model->model-converter-wrapper\n";
model_v2_pp(out, *m_model);
out << ")\n";
@ -198,6 +209,7 @@ public:
model * m = m_model->translate(translator);
return alloc(model2mc, m);
}
};
model_converter * model2model_converter(model * m) {