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significant update to Horn routines: add module hnf to extract Horn normal form (removed from rule_manager). Associate proof objects with rules to track (all) rewrites, so that proof traces can be tracked back to original rules after transformations

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-03-23 14:11:54 -07:00
parent e73c06a8b0
commit 26f4d3be20
60 changed files with 591 additions and 428 deletions
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2
src/api/z3_api.h
View file

@ -701,7 +701,7 @@ typedef enum
over Boolean connectives 'and' and 'or'.
- Z3_OP_PR_NFF_NEG: Proof for a (negative) NNF step. Examples:
- Z3_OP_PR_NNF_NEG: Proof for a (negative) NNF step. Examples:
\nicebox{
T1: (not s_1) ~ r_1
...

30
src/ast/rewriter/quant_hoist.cpp
View file

@ -80,7 +80,7 @@ public:
instantiate(m, q, exprs, result);
}
unsigned pull_quantifier(bool is_forall, expr_ref& fml, svector<symbol>* names) {
unsigned pull_quantifier(bool is_forall, expr_ref& fml, ptr_vector<sort>* sorts, svector<symbol>* names) {
unsigned index = var_counter().get_next_var(fml);
while (is_quantifier(fml) && (is_forall == to_quantifier(fml)->is_forall())) {
quantifier* q = to_quantifier(fml);
@ -88,6 +88,9 @@ public:
if (names) {
names->append(q->get_num_decls(), q->get_decl_names());
}
if (sorts) {
sorts->append(q->get_num_decls(), q->get_decl_sorts());
}
fml = q->get_expr();
}
if (!has_quantifiers(fml)) {
@ -100,12 +103,29 @@ public:
}
// replace vars by de-bruijn indices
expr_safe_replace rep(m);
svector<symbol> bound_names;
ptr_vector<sort> bound_sorts;
for (unsigned i = 0; i < vars.size(); ++i) {
app* v = vars[i].get();
if (names) {
names->push_back(v->get_decl()->get_name());
bound_names.push_back(v->get_decl()->get_name());
}
rep.insert(v, m.mk_var(index++,m.get_sort(v)));
if (sorts) {
bound_sorts.push_back(m.get_sort(v));
}
rep.insert(v, m.mk_var(index++, m.get_sort(v)));
}
if (names && !bound_names.empty()) {
bound_names.reverse();
bound_names.append(*names);
names->reset();
names->append(bound_names);
}
if (sorts && !bound_sorts.empty()) {
bound_sorts.reverse();
bound_sorts.append(*sorts);
sorts->reset();
sorts->append(bound_sorts);
}
rep(fml);
return index;
@ -270,6 +290,6 @@ void quantifier_hoister::pull_quantifier(bool is_forall, expr_ref& fml, app_ref_
m_impl->pull_quantifier(is_forall, fml, vars);
}
unsigned quantifier_hoister::pull_quantifier(bool is_forall, expr_ref& fml, svector<symbol>* names) {
return m_impl->pull_quantifier(is_forall, fml, names);
unsigned quantifier_hoister::pull_quantifier(bool is_forall, expr_ref& fml, ptr_vector<sort>* sorts, svector<symbol>* names) {
return m_impl->pull_quantifier(is_forall, fml, sorts, names);
}

2
src/ast/rewriter/quant_hoist.h
View file

@ -66,7 +66,7 @@ public:
Return index of maximal variable.
*/
unsigned pull_quantifier(bool is_forall, expr_ref& fml, svector<symbol>* names);
unsigned pull_quantifier(bool is_forall, expr_ref& fml, ptr_vector<sort>* sorts, svector<symbol>* names);
};
#endif

2
src/muz_qe/dl_base.cpp
View file

@ -233,7 +233,7 @@ namespace datalog {
table_fact row;
for(; it!=iend; ++it) {
it->get_fact(row);
to_remove.append(row);
to_remove.push_back(row);
}
remove_facts(to_remove.size(), to_remove.c_ptr());
}

40
src/muz_qe/dl_bmc_engine.cpp
View file

@ -307,7 +307,7 @@ namespace datalog {
r1->to_formula(concl);
scoped_proof _sp(m);
proof* p = m.mk_asserted(fml);
proof* p = r->get_proof();
proof* premises[2] = { pr, p };
positions.push_back(std::make_pair(0, 1));
@ -320,7 +320,7 @@ namespace datalog {
else {
r2->to_formula(concl);
scoped_proof _sp(m);
proof* p = m.mk_asserted(fml);
proof* p = r->get_proof();
if (sub.empty()) {
pr = p;
}
@ -340,7 +340,7 @@ namespace datalog {
pred = r->get_decl(0);
}
scoped_proof _sp(m);
apply(m, b.m_pc.get(), pr);
apply(m, b.m_ctx.get_proof_converter().get(), pr);
b.m_answer = pr;
return l_true;
}
@ -474,6 +474,9 @@ namespace datalog {
}
proof_ref get_proof(model_ref& md, func_decl* pred, app* prop, unsigned level) {
if (b.m_cancel) {
return proof_ref(0, m);
}
TRACE("bmc", tout << "Predicate: " << pred->get_name() << "\n";);
expr_ref prop_r(m), prop_v(m), fml(m), prop_body(m), tmp(m), body(m);
@ -497,7 +500,7 @@ namespace datalog {
SASSERT(r);
r->to_formula(fml);
IF_VERBOSE(1, verbose_stream() << mk_pp(fml, m) << "\n";);
prs.push_back(m.mk_asserted(fml));
prs.push_back(r->get_proof());
unsigned sz = r->get_uninterpreted_tail_size();
ptr_vector<sort> rule_vars;
@ -536,8 +539,9 @@ namespace datalog {
model_ref md;
b.m_solver.get_model(md);
IF_VERBOSE(2, model_smt2_pp(verbose_stream(), m, *md, 0););
proof_ref pr = get_proof(md, b.m_query_pred, to_app(level_query), level);
apply(m, b.m_pc.get(), pr);
proof_ref pr(m);
pr = get_proof(md, b.m_query_pred, to_app(level_query), level);
apply(m, b.m_ctx.get_proof_converter().get(), pr);
b.m_answer = pr;
}
@ -1034,7 +1038,7 @@ namespace datalog {
var_subst vs(m, false);
mk_subst(*rules[i], path, trace, sub);
rules[i]->to_formula(fml);
prs.push_back(m.mk_asserted(fml));
prs.push_back(rules[i]->get_proof());
unsigned sz = trace->get_num_args();
if (sub.empty() && sz == 0) {
pr = prs[0].get();
@ -1112,7 +1116,6 @@ namespace datalog {
}
void mk_answer(model_ref& md, expr_ref& trace, expr_ref& path) {
proof_ref pr(m);
IF_VERBOSE(2, model_smt2_pp(verbose_stream(), m, *md, 0););
md->eval(trace, trace);
md->eval(path, path);
@ -1120,7 +1123,11 @@ namespace datalog {
for (unsigned i = 0; i < b.m_solver.size(); ++i) {
verbose_stream() << mk_pp(b.m_solver.get_formulas()[i], m) << "\n";
});
b.m_answer = get_proof(md, to_app(trace), to_app(path));
scoped_proof _sp(m);
proof_ref pr(m);
pr = get_proof(md, to_app(trace), to_app(path));
apply(m, b.m_ctx.get_proof_converter().get(), pr);
b.m_answer = pr;
}
};
@ -1155,6 +1162,9 @@ namespace datalog {
private:
void get_model(unsigned level) {
if (b.m_cancel) {
return;
}
rule_manager& rm = b.m_ctx.get_rule_manager();
expr_ref level_query = mk_level_predicate(b.m_query_pred, level);
model_ref md;
@ -1212,7 +1222,7 @@ namespace datalog {
r1->to_formula(concl);
scoped_proof _sp(m);
proof* p = m.mk_asserted(fml);
proof* p = r->get_proof();
proof* premises[2] = { pr, p };
positions.push_back(std::make_pair(0, 1));
@ -1225,7 +1235,7 @@ namespace datalog {
else {
r2->to_formula(concl);
scoped_proof _sp(m);
proof* p = m.mk_asserted(fml);
proof* p = r->get_proof();
if (sub.empty()) {
pr = p;
}
@ -1245,7 +1255,7 @@ namespace datalog {
pred = r->get_decl(0);
}
scoped_proof _sp(m);
apply(m, b.m_pc.get(), pr);
apply(m, b.m_ctx.get_proof_converter().get(), pr);
b.m_answer = pr;
}
@ -1409,6 +1419,7 @@ namespace datalog {
m_ctx.ensure_opened();
m_rules.reset();
datalog::rule_manager& rule_manager = m_ctx.get_rule_manager();
datalog::rule_set old_rules(m_ctx.get_rules());
datalog::rule_ref_vector query_rules(rule_manager);
@ -1417,11 +1428,8 @@ namespace datalog {
m_ctx.add_rules(query_rules);
expr_ref bg_assertion = m_ctx.get_background_assertion();
model_converter_ref mc = datalog::mk_skip_model_converter();
m_pc = datalog::mk_skip_proof_converter();
m_ctx.set_output_predicate(m_query_pred);
m_ctx.set_model_converter(mc);
m_ctx.set_proof_converter(m_pc);
m_ctx.apply_default_transformation();
if (m_ctx.get_params().slice()) {

1
src/muz_qe/dl_bmc_engine.h
View file

@ -39,7 +39,6 @@ namespace datalog {
func_decl_ref m_query_pred;
expr_ref m_answer;
volatile bool m_cancel;
proof_converter_ref m_pc;
void checkpoint();

4
src/muz_qe/dl_cmds.cpp
View file

@ -262,8 +262,10 @@ public:
case datalog::OK:
break;
default:
UNREACHABLE();
// exception was raised.
break;
}
break;
}

32
src/muz_qe/dl_context.cpp
View file

@ -231,6 +231,7 @@ namespace datalog {
m_rule_set(*this),
m_rule_fmls(m),
m_background(m),
m_mc(0),
m_closed(false),
m_saturation_was_run(false),
m_last_answer(m),
@ -474,8 +475,11 @@ namespace datalog {
void context::flush_add_rules() {
datalog::rule_manager& rm = get_rule_manager();
datalog::rule_ref_vector rules(rm);
scoped_proof_mode _scp(m, generate_proof_trace()?PGM_FINE:PGM_DISABLED);
for (unsigned i = 0; i < m_rule_fmls.size(); ++i) {
rm.mk_rule(m_rule_fmls[i].get(), rules, m_rule_names[i]);
expr* fml = m_rule_fmls[i].get();
proof* p = generate_proof_trace()?m.mk_asserted(fml):0;
rm.mk_rule(fml, p, rules, m_rule_names[i]);
}
add_rules(rules);
m_rule_fmls.reset();
@ -489,7 +493,11 @@ namespace datalog {
void context::update_rule(expr* rl, symbol const& name) {
datalog::rule_manager& rm = get_rule_manager();
datalog::rule_ref_vector rules(rm);
rm.mk_rule(rl, rules, name);
proof* p = 0;
if (generate_proof_trace()) {
p = m.mk_asserted(rl);
}
rm.mk_rule(rl, p, rules, name);
if (rules.size() != 1) {
std::stringstream strm;
strm << "Rule " << name << " has a non-trivial body. It cannot be modified";
@ -683,7 +691,7 @@ namespace datalog {
todo.push_back(e2);
}
else if (is_quantifier(e)) {
todo.append(to_quantifier(e)->get_expr());
todo.push_back(to_quantifier(e)->get_expr());
}
else if ((m.is_eq(e, e1, e2) || m.is_iff(e, e1, e2)) &&
m.is_true(e1)) {
@ -737,6 +745,9 @@ namespace datalog {
UNREACHABLE();
break;
}
if (generate_proof_trace() && !r->get_proof()) {
m_rule_manager.mk_rule_asserted_proof(*r.get());
}
}
void context::add_rule(rule_ref& r) {
@ -847,7 +858,7 @@ namespace datalog {
void context::transform_rules(rule_transformer& transf) {
SASSERT(m_closed); //we must finish adding rules before we start transforming them
TRACE("dl", display_rules(tout););
if (transf(m_rule_set, m_mc, m_pc)) {
if (transf(m_rule_set, m_mc)) {
//we have already ensured the negation is stratified and transformations
//should not break the stratification
m_rule_set.ensure_closed();
@ -887,9 +898,9 @@ namespace datalog {
m_transf.register_plugin(alloc(datalog::mk_rule_inliner, *this, 34890));
m_transf.register_plugin(alloc(datalog::mk_subsumption_checker, *this, 34880));
m_transf.register_plugin(alloc(datalog::mk_bit_blast, *this, 35000));
m_transf.register_plugin(alloc(datalog::mk_array_blast, *this, 36000));
m_transf.register_plugin(alloc(datalog::mk_karr_invariants, *this, 36010));
m_transf.register_plugin(alloc(datalog::mk_bit_blast, *this, 34870));
m_transf.register_plugin(alloc(datalog::mk_array_blast, *this, 34860));
m_transf.register_plugin(alloc(datalog::mk_karr_invariants, *this, 34850));
transform_rules(m_transf);
}
@ -1035,6 +1046,8 @@ namespace datalog {
}
void context::new_query() {
m_mc = mk_skip_model_converter();
flush_add_rules();
m_last_status = OK;
m_last_answer = 0;
@ -1146,6 +1159,7 @@ namespace datalog {
switch(get_engine()) {
case DATALOG_ENGINE:
return false;
case PDR_ENGINE:
case QPDR_ENGINE:
ensure_pdr();
m_pdr->display_certificate(out);
@ -1239,7 +1253,7 @@ namespace datalog {
ptr_vector<sort> sorts;
get_free_vars(m_rule_fmls[i].get(), sorts);
if (!sorts.empty()) {
rm.mk_rule(m_rule_fmls[i].get(), rule_refs, m_rule_names[i]);
rm.mk_rule(m_rule_fmls[i].get(), 0, rule_refs, m_rule_names[i]);
m_rule_fmls[i] = m_rule_fmls.back();
m_rule_names[i] = m_rule_names.back();
m_rule_fmls.pop_back();
@ -1256,7 +1270,7 @@ namespace datalog {
}
for (unsigned i = 0; i < m_rule_fmls.size(); ++i) {
rules.push_back(m_rule_fmls[i].get());
names.push_back(m_rule_names[i]);
names.push_back(m_rule_names[i]);
}
}

13
src/muz_qe/dl_context.h
View file

@ -42,7 +42,6 @@ Revision History:
#include"params.h"
#include"trail.h"
#include"model_converter.h"
#include"proof_converter.h"
#include"model2expr.h"
#include"smt_params.h"
#include"dl_rule_transformer.h"
@ -142,6 +141,7 @@ namespace datalog {
var_subst & get_var_subst() { return m_var_subst; }
dl_decl_util & get_decl_util() { return m_decl_util; }
bool generate_proof_trace() const { return m_params.generate_proof_trace(); }
bool output_profile() const { return m_params.output_profile(); }
bool fix_unbound_vars() const { return m_params.fix_unbound_vars(); }
symbol default_table() const { return m_params.default_table(); }
@ -315,14 +315,15 @@ namespace datalog {
void reopen();
void ensure_opened();
void set_model_converter(model_converter_ref& mc) { m_mc = mc; }
void set_proof_converter(proof_converter_ref& pc) { m_pc = pc; }
model_converter_ref& get_model_converter() { return m_mc; }
proof_converter_ref& get_proof_converter() { return m_pc; }
void add_proof_converter(proof_converter* pc) { m_pc = concat(m_pc.get(), pc); }
void transform_rules(); // model_converter_ref& mc, proof_converter_ref& pc);
void transform_rules(rule_transformer& transf); // , model_converter_ref& mc, proof_converter_ref& pc);
void transform_rules();
void transform_rules(rule_transformer& transf);
void replace_rules(rule_set & rs);
void apply_default_transformation(); // model_converter_ref& mc, proof_converter_ref& pc);
void apply_default_transformation();
void collect_params(param_descrs& r);

18
src/muz_qe/dl_mk_array_blast.cpp
View file

@ -197,25 +197,18 @@ namespace datalog {
}
fml2 = m.mk_implies(body, head);
rm.mk_rule(fml2, new_rules, r.name());
proof_ref p(m);
rm.mk_rule(fml2, p, new_rules, r.name());
SASSERT(new_rules.size() == 1);
TRACE("dl", new_rules[0]->display(m_ctx, tout << "new rule\n"););
rules.add_rule(new_rules[0].get());
if (m_pc) {
new_rules[0]->to_formula(fml2);
m_pc->insert(fml1, fml2);
}
rm.mk_rule_rewrite_proof(r, *new_rules[0].get());
return true;
}
rule_set * mk_array_blast::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
ref<equiv_proof_converter> epc;
if (pc) {
epc = alloc(equiv_proof_converter, m);
}
m_pc = epc.get();
rule_set * mk_array_blast::operator()(rule_set const & source, model_converter_ref& mc) {
rule_set* rules = alloc(rule_set, m_ctx);
rule_set::iterator it = source.begin(), end = source.end();
@ -227,9 +220,6 @@ namespace datalog {
dealloc(rules);
rules = 0;
}
if (pc) {
pc = concat(pc.get(), epc.get());
}
return rules;
}

3
src/muz_qe/dl_mk_array_blast.h
View file

@ -37,7 +37,6 @@ namespace datalog {
rule_manager& rm;
params_ref m_params;
th_rewriter m_rewriter;
equiv_proof_converter* m_pc;
typedef obj_map<app, var*> defs_t;
@ -55,7 +54,7 @@ namespace datalog {
virtual ~mk_array_blast();
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};

119
src/muz_qe/dl_mk_bit_blast.cpp
View file

@ -21,7 +21,8 @@ Revision History:
#include "bit_blaster_rewriter.h"
#include "rewriter_def.h"
#include "ast_pp.h"
#include "expr_safe_replace.h"
#include "filter_model_converter.h"
namespace datalog {
@ -35,6 +36,73 @@ namespace datalog {
// P(bv(x,y)) :- P_bv(x,y)
// Query
// this model converter should be composed with a filter converter
// that gets rid of the new functions.
class bit_blast_model_converter : public model_converter {
ast_manager& m;
bv_util m_bv;
func_decl_ref_vector m_old_funcs;
func_decl_ref_vector m_new_funcs;
public:
bit_blast_model_converter(ast_manager& m):
m(m),
m_bv(m),
m_old_funcs(m),
m_new_funcs(m) {}
void insert(func_decl* old_f, func_decl* new_f) {
m_old_funcs.push_back(old_f);
m_new_funcs.push_back(new_f);
}
virtual model_converter * translate(ast_translation & translator) {
return alloc(bit_blast_model_converter, m);
}
virtual void operator()(model_ref & model) {
for (unsigned i = 0; i < m_new_funcs.size(); ++i) {
func_decl* p = m_new_funcs[i].get();
func_decl* q = m_old_funcs[i].get();
func_interp* f = model->get_func_interp(p);
expr_ref body(m);
unsigned arity_p = p->get_arity();
unsigned arity_q = q->get_arity();
SASSERT(0 < arity_p);
model->register_decl(p, f);
func_interp* g = alloc(func_interp, m, arity_q);
if (f) {
body = f->get_interp();
SASSERT(!f->is_partial());
SASSERT(body);
}
else {
body = m.mk_false();
}
unsigned idx = 0;
expr_ref arg(m), proj(m);
expr_safe_replace sub(m);
for (unsigned j = 0; j < arity_q; ++j) {
sort* s = q->get_domain(j);
arg = m.mk_var(j, s);
if (m_bv.is_bv_sort(s)) {
expr* args[1] = { arg };
unsigned sz = m_bv.get_bv_size(s);
for (unsigned k = 0; k < sz; ++k) {
proj = m.mk_app(m_bv.get_family_id(), OP_BIT2BOOL, 1, args);
sub.insert(m.mk_var(idx++, m.mk_bool_sort()), proj);
}
}
else {
sub.insert(m.mk_var(idx++, s), arg);
}
}
sub(body);
g->set_else(body);
model->register_decl(q, g);
}
}
};
class expand_mkbv_cfg : public default_rewriter_cfg {
@ -43,7 +111,8 @@ namespace datalog {
ast_manager& m;
bv_util m_util;
expr_ref_vector m_args, m_f_vars, m_g_vars;
func_decl_ref_vector m_pinned;
func_decl_ref_vector m_old_funcs;
func_decl_ref_vector m_new_funcs;
obj_map<func_decl,func_decl*> m_pred2blast;
@ -57,10 +126,14 @@ namespace datalog {
m_args(m),
m_f_vars(m),
m_g_vars(m),
m_pinned(m)
m_old_funcs(m),
m_new_funcs(m)
{}
~expand_mkbv_cfg() {}
func_decl_ref_vector const& old_funcs() const { return m_old_funcs; }
func_decl_ref_vector const& new_funcs() const { return m_new_funcs; }
br_status reduce_app(func_decl * f, unsigned num, expr * const * args, expr_ref & result, proof_ref & result_pr) {
rule_manager& rm = m_context.get_rule_manager();
@ -105,13 +178,18 @@ namespace datalog {
domain.push_back(m.get_sort(m_args[i].get()));
}
g = m_context.mk_fresh_head_predicate(f->get_name(), symbol("bv"), m_args.size(), domain.c_ptr(), f);
m_pinned.push_back(g);
m_old_funcs.push_back(f);
m_new_funcs.push_back(g);
m_pred2blast.insert(f, g);
// Create rule f(mk_mkbv(args)) :- g(args)
fml = m.mk_implies(m.mk_app(g, m_g_vars.size(), m_g_vars.c_ptr()), m.mk_app(f, m_f_vars.size(), m_f_vars.c_ptr()));
rm.mk_rule(fml, m_rules, g->get_name());
proof_ref pr(m);
if (m_context.generate_proof_trace()) {
pr = m.mk_asserted(fml); // or a def?
}
rm.mk_rule(fml, pr, m_rules, g->get_name());
}
result = m.mk_app(g, m_args.size(), m_args.c_ptr());
result_pr = 0;
@ -170,14 +248,11 @@ namespace datalog {
m_blaster.updt_params(m_params);
}
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * operator()(rule_set const & source, model_converter_ref& mc) {
// TODO pc
if (!m_context.get_params().bit_blast()) {
return 0;
}
if (m_context.get_engine() != PDR_ENGINE) {
return 0;
}
rule_manager& rm = m_context.get_rule_manager();
unsigned sz = source.get_num_rules();
expr_ref fml(m);
@ -185,9 +260,13 @@ namespace datalog {
rule_set * result = alloc(rule_set, m_context);
for (unsigned i = 0; i < sz; ++i) {
rule * r = source.get_rule(i);
r->to_formula(fml);
r->to_formula(fml);
if (blast(fml)) {
rm.mk_rule(fml, m_rules, r->name());
proof_ref pr(m);
if (m_context.generate_proof_trace()) {
pr = m.mk_asserted(fml); // loses original proof of r.
}
rm.mk_rule(fml, pr, m_rules, r->name());
}
else {
m_rules.push_back(r);
@ -197,6 +276,18 @@ namespace datalog {
for (unsigned i = 0; i < m_rules.size(); ++i) {
result->add_rule(m_rules.get(i));
}
if (mc) {
filter_model_converter* fmc = alloc(filter_model_converter, m);
bit_blast_model_converter* bvmc = alloc(bit_blast_model_converter, m);
func_decl_ref_vector const& old_funcs = m_rewriter.m_cfg.old_funcs();
func_decl_ref_vector const& new_funcs = m_rewriter.m_cfg.new_funcs();
for (unsigned i = 0; i < old_funcs.size(); ++i) {
fmc->insert(new_funcs[i]);
bvmc->insert(old_funcs[i], new_funcs[i]);
}
mc = concat(mc.get(), concat(bvmc, fmc));
}
return result;
}
@ -210,8 +301,8 @@ namespace datalog {
dealloc(m_impl);
}
rule_set * mk_bit_blast::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
return (*m_impl)(source, mc, pc);
rule_set * mk_bit_blast::operator()(rule_set const & source, model_converter_ref& mc) {
return (*m_impl)(source, mc);
}
};

2
src/muz_qe/dl_mk_bit_blast.h
View file

@ -44,7 +44,7 @@ namespace datalog {
mk_bit_blast(context & ctx, unsigned priority = 35000);
~mk_bit_blast();
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

20
src/muz_qe/dl_mk_coalesce.cpp
View file

@ -133,7 +133,7 @@ namespace datalog {
tail.push_back(to_app(fml));
is_neg.push_back(false);
res = rm.mk(head, tail.size(), tail.c_ptr(), is_neg.c_ptr(), tgt->name());
if (m_pc) {
if (m_ctx.generate_proof_trace()) {
src.to_formula(fml1);
tgt->to_formula(fml2);
res->to_formula(fml);
@ -142,12 +142,13 @@ namespace datalog {
sort* domain[3] = { ps, ps, m.mk_bool_sort() };
func_decl* merge = m.mk_func_decl(symbol("merge-clauses"), 3, domain, ps); // TBD: ad-hoc proof rule
expr* args[3] = { m.mk_asserted(fml1), m.mk_asserted(fml2), fml };
m_pc->insert(m.mk_app(merge, 3, args));
// ...m_pc->insert(m.mk_app(merge, 3, args));
#else
svector<std::pair<unsigned, unsigned> > pos;
vector<expr_ref_vector> substs;
proof* p = m.mk_asserted(fml1);
m_pc->insert(m.mk_hyper_resolve(1, &p, fml, pos, substs));
proof* p = src.get_proof();
p = m.mk_hyper_resolve(1, &p, fml, pos, substs);
res->set_proof(m, p);
#endif
}
tgt = res;
@ -170,13 +171,7 @@ namespace datalog {
return true;
}
rule_set * mk_coalesce::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
m_pc = 0;
ref<replace_proof_converter> rpc;
if (pc) {
rpc = alloc(replace_proof_converter, m);
m_pc = rpc.get();
}
rule_set * mk_coalesce::operator()(rule_set const & source, model_converter_ref& mc) {
rule_set* rules = alloc(rule_set, m_ctx);
rule_set::decl2rules::iterator it = source.begin_grouped_rules(), end = source.end_grouped_rules();
for (; it != end; ++it) {
@ -195,9 +190,6 @@ namespace datalog {
rules->add_rule(r1.get());
}
}
if (pc) {
pc = concat(pc.get(), rpc.get());
}
return rules;
}

3
src/muz_qe/dl_mk_coalesce.h
View file

@ -37,7 +37,6 @@ namespace datalog {
rule_manager& rm;
expr_ref_vector m_sub1, m_sub2;
unsigned m_idx;
replace_proof_converter* m_pc;
void mk_pred(app_ref& pred, app* p1, app* p2);
@ -53,7 +52,7 @@ namespace datalog {
*/
mk_coalesce(context & ctx);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

3
src/muz_qe/dl_mk_coi_filter.cpp
View file

@ -35,8 +35,7 @@ namespace datalog {
rule_set * mk_coi_filter::operator()(
rule_set const & source,
model_converter_ref& mc,
proof_converter_ref& pc)
model_converter_ref& mc)
{
if (source.get_num_rules()==0) {
return 0;

3
src/muz_qe/dl_mk_coi_filter.h
View file

@ -40,8 +40,7 @@ namespace datalog {
rule_set * operator()(rule_set const & source,
model_converter_ref& mc,
proof_converter_ref& pc);
model_converter_ref& mc);
};
};

4
src/muz_qe/dl_mk_explanations.cpp
View file

@ -875,8 +875,8 @@ namespace datalog {
}
}
rule_set * mk_explanations::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
SASSERT(!mc && !pc);
rule_set * mk_explanations::operator()(rule_set const & source, model_converter_ref& mc) {
SASSERT(!mc);
if(source.get_num_rules()==0) {
return 0;
}

2
src/muz_qe/dl_mk_explanations.h
View file

@ -82,7 +82,7 @@ namespace datalog {
return get_union_decl(m_context);
}
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
static expr* get_explanation(relation_base const& r);
};

12
src/muz_qe/dl_mk_extract_quantifiers.cpp
View file

@ -168,7 +168,15 @@ namespace datalog {
fml = m.mk_implies(m.mk_and(fmls.size(), fmls.c_ptr()), r.get_head());
TRACE("dl", tout << "new rule\n" << mk_pp(fml, m) << "\n";);
rule_ref_vector rules(rm);
rm.mk_rule(fml, rules, r.name());
proof_ref pr(m);
if (m_ctx.generate_proof_trace()) {
scoped_proof _scp(m);
expr_ref fml1(m);
r.to_formula(fml1);
pr = m.mk_rewrite(fml1, fml);
pr = m.mk_modus_ponens(r.get_proof(), pr);
}
rm.mk_rule(fml, pr, rules, r.name());
for (unsigned i = 0; i < rules.size(); ++i) {
new_rules.add_rule(rules[i].get());
m_quantifiers.insert(rules[i].get(), alloc(quantifier_ref_vector, qs));
@ -347,7 +355,7 @@ namespace datalog {
m_quantifiers.reset();
}
rule_set * mk_extract_quantifiers::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
rule_set * mk_extract_quantifiers::operator()(rule_set const & source, model_converter_ref& mc) {
reset();
rule_set::iterator it = source.begin(), end = source.end();
for (; !m_has_quantifiers && it != end; ++it) {

2
src/muz_qe/dl_mk_extract_quantifiers.h
View file

@ -77,7 +77,7 @@ namespace datalog {
void set_query(func_decl* q);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
bool has_quantifiers() { return m_has_quantifiers; }

6
src/muz_qe/dl_mk_filter_rules.cpp
View file

@ -90,6 +90,7 @@ namespace datalog {
rule * filter_rule = m_context.get_rule_manager().mk(filter_head, 1, &filter_tail, (const bool *)0);
filter_rule->set_accounting_parent_object(m_context, m_current);
m_result->add_rule(filter_rule);
m_context.get_rule_manager().mk_rule_asserted_proof(*filter_rule);
}
else {
dealloc(key);
@ -135,12 +136,13 @@ namespace datalog {
}
new_is_negated.push_back(r->is_neg_tail(i));
}
if(rule_modified) {
if (rule_modified) {
remove_duplicate_tails(new_tail, new_is_negated);
SASSERT(new_tail.size() == new_is_negated.size());
rule * new_rule = m_context.get_rule_manager().mk(new_head, new_tail.size(), new_tail.c_ptr(), new_is_negated.c_ptr());
new_rule->set_accounting_parent_object(m_context, m_current);
m_result->add_rule(new_rule);
m_context.get_rule_manager().mk_rule_rewrite_proof(*r, *new_rule);
m_modified = true;
}
else {
@ -148,7 +150,7 @@ namespace datalog {
}
}
rule_set * mk_filter_rules::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
rule_set * mk_filter_rules::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc, pc
m_tail2filter.reset();
m_result = alloc(rule_set, m_context);

2
src/muz_qe/dl_mk_filter_rules.h
View file

@ -72,7 +72,7 @@ namespace datalog {
/**
\brief Return a new rule set where only filter rules contain atoms with repeated variables and/or values.
*/
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

7
src/muz_qe/dl_mk_interp_tail_simplifier.cpp
View file

@ -554,11 +554,13 @@ namespace datalog {
bool mk_interp_tail_simplifier::transform_rules(const rule_set & orig, rule_set & tgt) {
bool modified = false;
rule_manager& rm = m_context.get_rule_manager();
rule_set::iterator rit = orig.begin();
rule_set::iterator rend = orig.end();
for (; rit!=rend; ++rit) {
rule_ref new_rule(m_context.get_rule_manager());
rule_ref new_rule(rm);
if (transform_rule(*rit, new_rule)) {
rm.mk_rule_rewrite_proof(**rit, *new_rule.get());
bool is_modified = *rit != new_rule;
modified |= is_modified;
tgt.add_rule(new_rule);
@ -570,8 +572,7 @@ namespace datalog {
return modified;
}
rule_set * mk_interp_tail_simplifier::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_interp_tail_simplifier::operator()(rule_set const & source, model_converter_ref& mc) {
if (source.get_num_rules() == 0) {
return 0;
}

2
src/muz_qe/dl_mk_interp_tail_simplifier.h
View file

@ -93,7 +93,7 @@ namespace datalog {
*/
bool transform_rule(rule * r, rule_ref& res);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

5
src/muz_qe/dl_mk_karr_invariants.cpp
View file

@ -310,7 +310,7 @@ namespace datalog {
m_hb.reset();
for (unsigned i = 0; i < src.size(); ++i) {
vector<rational> v(src.A[i]);
v.append(src.b[i]);
v.push_back(src.b[i]);
if (src.eq[i]) {
m_hb.add_eq(v, rational(0));
}
@ -420,6 +420,7 @@ namespace datalog {
new_rule = rm.mk(r.get_head(), tail.size(), tail.c_ptr(), 0, r.name());
}
rules.add_rule(new_rule);
rm.mk_rule_rewrite_proof(r, *new_rule); // should be weakening rule.
}
class mk_karr_invariants::add_invariant_model_converter : public model_converter {
@ -519,7 +520,7 @@ namespace datalog {
m_hb.set_cancel(true);
}
rule_set * mk_karr_invariants::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
rule_set * mk_karr_invariants::operator()(rule_set const & source, model_converter_ref& mc) {
if (!m_ctx.get_params().karr()) {
return 0;
}

2
src/muz_qe/dl_mk_karr_invariants.h
View file

@ -69,7 +69,7 @@ namespace datalog {
virtual void cancel();
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};

4
src/muz_qe/dl_mk_magic_sets.cpp
View file

@ -317,8 +317,8 @@ namespace datalog {
m_rules.push_back(r);
}
rule_set * mk_magic_sets::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
SASSERT(!mc && !pc);
rule_set * mk_magic_sets::operator()(rule_set const & source, model_converter_ref& mc) {
SASSERT(!mc);
unsigned init_rule_cnt = source.get_num_rules();
{
func_decl_set intentional;

2
src/muz_qe/dl_mk_magic_sets.h
View file

@ -121,7 +121,7 @@ namespace datalog {
*/
mk_magic_sets(context & ctx, rule * goal_rule);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

4
src/muz_qe/dl_mk_partial_equiv.cpp
View file

@ -86,8 +86,8 @@ namespace datalog {
}
rule_set * mk_partial_equivalence_transformer::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_partial_equivalence_transformer::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc
if (source.get_num_rules() == 0) {
return 0;

2
src/muz_qe/dl_mk_partial_equiv.h
View file

@ -35,7 +35,7 @@ namespace datalog {
m(ctx.get_manager()),
m_context(ctx) {}
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
private:

14
src/muz_qe/dl_mk_rule_inliner.cpp
View file

@ -181,10 +181,10 @@ namespace datalog {
}
if (m_unifier.apply(tgt, tail_index, src, res)) {
if (m_pc) {
if (m_context.generate_proof_trace()) {
expr_ref_vector s1 = m_unifier.get_rule_subst(tgt, true);
expr_ref_vector s2 = m_unifier.get_rule_subst(src, false);
datalog::resolve_rule(m_pc, tgt, src, tail_index, s1, s2, *res.get());
datalog::resolve_rule(tgt, src, tail_index, s1, s2, *res.get());
}
return true;
}
@ -837,11 +837,10 @@ namespace datalog {
return done_something;
}
rule_set * mk_rule_inliner::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
rule_set * mk_rule_inliner::operator()(rule_set const & source, model_converter_ref& mc) {
bool something_done = false;
ref<horn_subsume_model_converter> hsmc;
ref<replace_proof_converter> hpc;
if (source.get_num_rules() == 0) {
return 0;
@ -858,11 +857,7 @@ namespace datalog {
if (mc) {
hsmc = alloc(horn_subsume_model_converter, m);
}
if (pc) {
hpc = alloc(replace_proof_converter, m);
}
m_mc = hsmc.get();
m_pc = hpc.get();
scoped_ptr<rule_set> res = alloc(rule_set, m_context);
@ -889,9 +884,6 @@ namespace datalog {
if (mc) {
mc = concat(mc.get(), hsmc.get());
}
if (pc) {
pc = concat(pc.get(), hpc.get());
}
}
return res.detach();

4
src/muz_qe/dl_mk_rule_inliner.h
View file

@ -114,7 +114,6 @@ namespace datalog {
ast_counter m_tail_pred_ctr;
rule_set m_inlined_rules;
horn_subsume_model_converter* m_mc;
replace_proof_converter* m_pc;
//used in try_to_inline_rule and do_eager_inlining
@ -188,7 +187,6 @@ namespace datalog {
m_pinned(m_rm),
m_inlined_rules(m_context),
m_mc(0),
m_pc(0),
m_unifier(ctx),
m_head_index(m),
m_tail_index(m),
@ -198,7 +196,7 @@ namespace datalog {
{}
virtual ~mk_rule_inliner() { }
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

4
src/muz_qe/dl_mk_similarity_compressor.cpp
View file

@ -500,8 +500,8 @@ namespace datalog {
}
}
rule_set * mk_similarity_compressor::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_similarity_compressor::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc
m_modified = false;
unsigned init_rule_cnt = source.get_num_rules();
SASSERT(m_rules.empty());

2
src/muz_qe/dl_mk_similarity_compressor.h
View file

@ -69,7 +69,7 @@ namespace datalog {
public:
mk_similarity_compressor(context & ctx, unsigned threshold_count);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

9
src/muz_qe/dl_mk_simple_joins.cpp
View file

@ -706,19 +706,20 @@ namespace datalog {
negs.c_ptr());
new_rule->set_accounting_parent_object(m_context, orig_r);
m_context.get_rule_manager().mk_rule_rewrite_proof(*orig_r, *new_rule);
result->add_rule(new_rule);
}
while(!m_introduced_rules.empty()) {
while (!m_introduced_rules.empty()) {
result->add_rule(m_introduced_rules.back());
m_context.get_rule_manager().mk_rule_asserted_proof(*m_introduced_rules.back());
m_introduced_rules.pop_back();
}
return result;
}
};
rule_set * mk_simple_joins::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_simple_joins::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc
rule_set rs_aux_copy(m_context);
rs_aux_copy.add_rules(source);
if(!rs_aux_copy.is_closed()) {

2
src/muz_qe/dl_mk_simple_joins.h
View file

@ -53,7 +53,7 @@ namespace datalog {
public:
mk_simple_joins(context & ctx);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

15
src/muz_qe/dl_mk_slice.cpp
View file

@ -164,10 +164,8 @@ namespace datalog {
TRACE("dl", tout << "does not have fact\n" << mk_pp(fact, m) << "\n";);
return false;
}
expr_ref fml(m);
proof_ref new_p(m);
r->to_formula(fml);
new_p = m.mk_asserted(fml);
new_p = r->get_proof();
m_pinned_exprs.push_back(new_p);
m_todo.pop_back();
m_new_proof.insert(p, new_p);
@ -784,6 +782,9 @@ namespace datalog {
rm.fix_unbound_vars(new_rule, false);
TRACE("dl", r.display(m_ctx, tout << "replacing:\n"); new_rule->display(m_ctx, tout << "by:\n"););
if (m_ctx.generate_proof_trace()) {
rm.mk_rule_asserted_proof(*new_rule.get());
}
}
else {
new_rule = &r;
@ -801,7 +802,7 @@ namespace datalog {
}
}
rule_set * mk_slice::operator()(rule_set const & src, model_converter_ref& mc, proof_converter_ref& pc) {
rule_set * mk_slice::operator()(rule_set const & src, model_converter_ref& mc) {
for (unsigned i = 0; i < src.get_num_rules(); ++i) {
if (src.get_rule(i)->has_quantifiers()) {
return 0;
@ -809,8 +810,8 @@ namespace datalog {
}
ref<slice_proof_converter> spc;
ref<slice_model_converter> smc;
if (pc) {
spc = alloc(slice_proof_converter, m_ctx);
if (m_ctx.generate_proof_trace()) {
spc = alloc(slice_proof_converter, m_ctx);
}
if (mc) {
smc = alloc(slice_model_converter, *this, m);
@ -834,7 +835,7 @@ namespace datalog {
m_mc->add_sliceable(it->m_key, it->m_value);
}
}
pc = concat(pc.get(), spc.get());
m_ctx.add_proof_converter(spc.get());
mc = concat(mc.get(), smc.get());
return result;
}

2
src/muz_qe/dl_mk_slice.h
View file

@ -102,7 +102,7 @@ namespace datalog {
virtual ~mk_slice() { }
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
func_decl* get_predicate(func_decl* p) { func_decl* q = p; m_predicates.find(p, q); return q; }

13
src/muz_qe/dl_mk_subsumption_checker.cpp
View file

@ -166,7 +166,8 @@ namespace datalog {
res = m_context.get_rule_manager().mk(head, tail.size(), tail.c_ptr(), tail_neg.c_ptr());
res->set_accounting_parent_object(m_context, r);
m_context.get_rule_manager().fix_unbound_vars(res, true);
m_context.get_rule_manager().mk_rule_rewrite_proof(*r, *res.get());
return true;
}
@ -208,10 +209,10 @@ namespace datalog {
continue;
}
rule * defining_rule;
TRUSTME(m_total_relation_defining_rules.find(head_pred, defining_rule));
if(defining_rule) {
VERIFY(m_total_relation_defining_rules.find(head_pred, defining_rule));
if (defining_rule) {
rule_ref totality_rule(m_context.get_rule_manager());
TRUSTME(transform_rule(defining_rule, subs_index, totality_rule));
VERIFY(transform_rule(defining_rule, subs_index, totality_rule));
if(defining_rule!=totality_rule) {
modified = true;
}
@ -331,8 +332,8 @@ namespace datalog {
}
}
rule_set * mk_subsumption_checker::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_subsumption_checker::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc
m_have_new_total_rule = false;
collect_ground_unconditional_rule_heads(source);

2
src/muz_qe/dl_mk_subsumption_checker.h
View file

@ -84,7 +84,7 @@ namespace datalog {
reset_dealloc_values(m_ground_unconditional_rule_heads);
}
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

5
src/muz_qe/dl_mk_unbound_compressor.cpp
View file

@ -238,6 +238,7 @@ namespace datalog {
unsigned new_rule_index = m_rules.size();
m_rules.push_back(new_rule);
m_context.get_rule_manager().mk_rule_rewrite_proof(*r, *new_rule.get());
m_head_occurrence_ctr.inc(new_rule->get_head()->get_decl());
@ -333,8 +334,8 @@ namespace datalog {
}
}
rule_set * mk_unbound_compressor::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
// TODO mc, pc
rule_set * mk_unbound_compressor::operator()(rule_set const & source, model_converter_ref& mc) {
// TODO mc
m_modified = false;
m_context.get_rel_context().get_rmanager().collect_non_empty_predicates(m_non_empty_rels);

2
src/muz_qe/dl_mk_unbound_compressor.h
View file

@ -82,7 +82,7 @@ namespace datalog {
public:
mk_unbound_compressor(context & ctx);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

15
src/muz_qe/dl_mk_unfold.cpp
View file

@ -42,29 +42,20 @@ namespace datalog {
if (m_unify.unify_rules(r, tail_idx, r2) &&
m_unify.apply(r, tail_idx, r2, new_rule)) {
expr_ref_vector s1 = m_unify.get_rule_subst(r, true);
expr_ref_vector s2 = m_unify.get_rule_subst(r2, false);
resolve_rule(m_pc, r, r2, tail_idx, s1, s2, *new_rule.get());
expr_ref_vector s2 = m_unify.get_rule_subst(r2, false);
resolve_rule(r, r2, tail_idx, s1, s2, *new_rule.get());
expand_tail(*new_rule.get(), tail_idx+r2.get_uninterpreted_tail_size(), src, dst);
}
}
}
}
rule_set * mk_unfold::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
m_pc = 0;
ref<replace_proof_converter> rpc;
if (pc) {
rpc = alloc(replace_proof_converter, m);
m_pc = rpc.get();
}
rule_set * mk_unfold::operator()(rule_set const & source, model_converter_ref& mc) {
rule_set* rules = alloc(rule_set, m_ctx);
rule_set::iterator it = source.begin(), end = source.end();
for (; it != end; ++it) {
expand_tail(**it, 0, source, *rules);
}
if (pc) {
pc = concat(pc.get(), rpc.get());
}
return rules;
}

3
src/muz_qe/dl_mk_unfold.h
View file

@ -35,7 +35,6 @@ namespace datalog {
ast_manager& m;
rule_manager& rm;
rule_unifier m_unify;
replace_proof_converter* m_pc;
void expand_tail(rule& r, unsigned tail_idx, rule_set const& src, rule_set& dst);
@ -45,7 +44,7 @@ namespace datalog {
*/
mk_unfold(context & ctx);
rule_set * operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc);
rule_set * operator()(rule_set const & source, model_converter_ref& mc);
};
};

333
src/muz_qe/dl_rule.cpp
View file

@ -42,13 +42,13 @@ Revision History:
#include"bool_rewriter.h"
#include"qe_lite.h"
#include"expr_safe_replace.h"
#include"hnf.h"
namespace datalog {
rule_manager::rule_manager(context& ctx)
: m(ctx.get_manager()),
m_ctx(ctx),
m_refs(ctx.get_manager()) {}
m_ctx(ctx) {}
bool rule_manager::is_predicate(func_decl * f) const {
return m_ctx.is_predicate(f);
@ -89,72 +89,32 @@ namespace datalog {
}
};
void rule_manager::remove_labels(expr_ref& fml) {
void rule_manager::remove_labels(expr_ref& fml, proof_ref& pr) {
expr_ref tmp(m);
remove_label_cfg r_cfg(m);
rewriter_tpl<remove_label_cfg> rwr(m, false, r_cfg);
rwr(fml, tmp);
if (pr && fml != tmp) {
pr = m.mk_modus_ponens(pr, m.mk_rewrite(fml, tmp));
}
fml = tmp;
}
void rule_manager::mk_rule(expr* fml, rule_ref_vector& rules, symbol const& name) {
void rule_manager::mk_rule(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name) {
scoped_proof_mode _sc(m, m_ctx.generate_proof_trace()?PGM_FINE:PGM_DISABLED);
proof_ref pr(p, m);
expr_ref fml1(m);
m_memoize_disj.reset();
m_refs.reset();
bind_variables(fml, true, fml1);
remove_labels(fml1);
mk_rule_core(fml1, rules, name);
if (fml1 != fml && pr) {
pr = m.mk_asserted(fml1);
}
remove_labels(fml1, pr);
mk_rule_core_new(fml1, pr, rules, name);
}
void rule_manager::mk_rule_core(expr* _fml, rule_ref_vector& rules, symbol const& name) {
app_ref_vector body(m);
app_ref head(m);
expr_ref e(m), fml(_fml, m);
svector<bool> is_negated;
TRACE("dl_rule", tout << mk_pp(fml, m) << "\n";);
quantifier_hoister qh(m);
unsigned index = qh.pull_quantifier(true, fml, 0);
check_app(fml);
head = to_app(fml);
while (m.is_implies(head)) {
e = head->get_arg(0);
th_rewriter th_rwr(m);
th_rwr(e);
body.push_back(ensure_app(e));
e = to_app(head)->get_arg(1);
check_app(e);
head = to_app(e.get());
}
symbol head_name = (name == symbol::null)?head->get_decl()->get_name():name;
flatten_body(body);
if (body.size() == 1 && m.is_or(body[0].get()) && contains_predicate(body[0].get())) {
app* _or = to_app(body[0].get());
for (unsigned i = 0; i < _or->get_num_args(); ++i) {
e = m.mk_implies(_or->get_arg(i), head);
mk_rule_core(e, rules, head_name);
}
return;
}
eliminate_disjunctions(body, rules, head_name);
eliminate_quantifier_body(body, rules, head_name);
hoist_compound(index, head, body);
unsigned sz = body.size();
for (unsigned i = 0; i < sz; ++i) {
app_ref b(body[i].get(), m);
hoist_compound(index, b, body);
body[i] = b;
}
TRACE("dl_rule",
tout << mk_pp(head, m) << " :- ";
for (unsigned i = 0; i < body.size(); ++i) {
tout << mk_pp(body[i].get(), m) << " ";
}
tout << "\n";);
void rule_manager::mk_negations(app_ref_vector& body, svector<bool>& is_negated) {
for (unsigned i = 0; i < body.size(); ++i) {
expr* e = body[i].get(), *e1;
if (m.is_not(e, e1) && is_predicate(e1)) {
@ -165,23 +125,105 @@ namespace datalog {
else {
is_negated.push_back(false);
}
}
check_valid_rule(head, body.size(), body.c_ptr());
}
}
rules.push_back(mk(head.get(), body.size(), body.c_ptr(), is_negated.c_ptr(), name));
if (m_ctx.fix_unbound_vars()) {
unsigned rule_cnt = rules.size();
for (unsigned i=0; i<rule_cnt; ++i) {
rule_ref r(rules[i].get(), *this);
fix_unbound_vars(r, true);
if (r.get()!=rules[i].get()) {
rules[i] = r;
}
}
void rule_manager::mk_rule_core_new(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name) {
hnf h(m);
expr_ref_vector fmls(m);
proof_ref_vector prs(m);
h.set_name(name);
h(fml, p, fmls, prs);
for (unsigned i = 0; i < h.get_fresh_predicates().size(); ++i) {
m_ctx.register_predicate(h.get_fresh_predicates()[i]);
}
for (unsigned i = 0; i < fmls.size(); ++i) {
mk_rule_core2(fmls[i].get(), prs[i].get(), rules, name);
}
}
void rule_manager::mk_rule_core2(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name) {
app_ref_vector body(m);
app_ref head(m);
svector<bool> is_negated;
unsigned index = extract_horn(fml, body, head);
hoist_compound_predicates(index, head, body);
TRACE("dl_rule",
tout << mk_pp(head, m) << " :- ";
for (unsigned i = 0; i < body.size(); ++i) {
tout << mk_pp(body[i].get(), m) << " ";
}
tout << "\n";);
mk_negations(body, is_negated);
check_valid_rule(head, body.size(), body.c_ptr());
rule_ref r(*this);
r = mk(head.get(), body.size(), body.c_ptr(), is_negated.c_ptr(), name);
expr_ref fml1(m);
if (p) {
r->to_formula(fml1);
if (fml1 == fml) {
// no-op.
}
else if (is_quantifier(fml1)) {
p = m.mk_modus_ponens(p, m.mk_symmetry(m.mk_der(to_quantifier(fml1), fml)));
}
else {
p = m.mk_modus_ponens(p, m.mk_rewrite(fml, fml1));
}
}
if (m_ctx.fix_unbound_vars()) {
fix_unbound_vars(r, true);
}
if (p) {
expr_ref fml2(m);
r->to_formula(fml2);
if (fml1 != fml2) {
p = m.mk_modus_ponens(p, m.mk_rewrite(fml1, fml2));
}
r->set_proof(m, p);
}
rules.push_back(r);
}
unsigned rule_manager::extract_horn(expr* fml, app_ref_vector& body, app_ref& head) {
expr* e1, *e2;
unsigned index = m_counter.get_next_var(fml);
if (::is_forall(fml)) {
index += to_quantifier(fml)->get_num_decls();
fml = to_quantifier(fml)->get_expr();
}
if (m.is_implies(fml, e1, e2)) {
expr_ref_vector es(m);
head = ensure_app(e2);
datalog::flatten_and(e1, es);
for (unsigned i = 0; i < es.size(); ++i) {
body.push_back(ensure_app(es[i].get()));
}
}
else {
head = ensure_app(fml);
}
return index;
}
void rule_manager::hoist_compound_predicates(unsigned index, app_ref& head, app_ref_vector& body) {
unsigned sz = body.size();
hoist_compound(index, head, body);
for (unsigned i = 0; i < sz; ++i) {
app_ref b(body[i].get(), m);
hoist_compound(index, b, body);
body[i] = b;
}
}
void rule_manager::mk_query(expr* query, func_decl_ref& qpred, rule_ref_vector& query_rules, rule_ref& query_rule) {
ptr_vector<sort> vars;
svector<symbol> names;
@ -192,7 +234,7 @@ namespace datalog {
// Remove existential prefix.
bind_variables(query, false, q);
quantifier_hoister qh(m);
qh.pull_quantifier(false, q, &names);
qh.pull_quantifier(false, q, 0, &names);
// retrieve free variables.
get_free_vars(q, vars);
if (vars.contains(static_cast<sort*>(0))) {
@ -250,7 +292,12 @@ namespace datalog {
rule_expr = m.mk_forall(vars.size(), vars.c_ptr(), names.c_ptr(), impl);
}
mk_rule(rule_expr, query_rules);
scoped_proof_mode _sc(m, m_ctx.generate_proof_trace()?PGM_FINE:PGM_DISABLED);
proof_ref pr(m);
if (m_ctx.generate_proof_trace()) {
pr = m.mk_asserted(rule_expr);
}
mk_rule(rule_expr, pr, query_rules);
SASSERT(query_rules.size() >= 1);
query_rule = query_rules.back();
}
@ -330,73 +377,6 @@ namespace datalog {
return false;
}
void rule_manager::eliminate_disjunctions(app_ref_vector::element_ref& body, rule_ref_vector& rules, symbol const& name) {
app* b = body.get();
expr* e1;
bool negate_args = false;
bool is_disj = false;
unsigned num_disj = 0;
expr* const* disjs = 0;
if (!contains_predicate(b)) {
return;
}
TRACE("dl_rule", tout << mk_ismt2_pp(b, m) << "\n";);
if (m.is_or(b)) {
is_disj = true;
negate_args = false;
num_disj = b->get_num_args();
disjs = b->get_args();
}
if (m.is_not(b, e1) && m.is_and(e1)) {
is_disj = true;
negate_args = true;
num_disj = to_app(e1)->get_num_args();
disjs = to_app(e1)->get_args();
}
if (is_disj) {
ptr_vector<sort> sorts0, sorts1;
get_free_vars(b, sorts0);
expr_ref_vector args(m);
for (unsigned i = 0; i < sorts0.size(); ++i) {
if (sorts0[i]) {
args.push_back(m.mk_var(i,sorts0[i]));
sorts1.push_back(sorts0[i]);
}
}
app* old_head = 0;
if (m_memoize_disj.find(b, old_head)) {
body = old_head;
}
else {
app_ref head(m);
func_decl_ref f(m);
f = m.mk_fresh_func_decl(name.str().c_str(),"", sorts1.size(), sorts1.c_ptr(), m.mk_bool_sort());
m_ctx.register_predicate(f);
head = m.mk_app(f, args.size(), args.c_ptr());
for (unsigned i = 0; i < num_disj; ++i) {
expr_ref fml(m);
expr* e = disjs[i];
if (negate_args) e = m.mk_not(e);
fml = m.mk_implies(e,head);
mk_rule_core(fml, rules, name);
}
m_memoize_disj.insert(b, head);
m_refs.push_back(b);
m_refs.push_back(head);
// update the body to be the newly introduced head relation
body = head;
}
}
}
void rule_manager::eliminate_disjunctions(app_ref_vector& body, rule_ref_vector& rules, symbol const& name) {
for (unsigned i = 0; i < body.size(); ++i) {
app_ref_vector::element_ref t = body[i];
eliminate_disjunctions(t, rules, name);
}
}
bool rule_manager::is_forall(ast_manager& m, expr* e, quantifier*& q) {
expr* e1, *e2;
@ -415,40 +395,6 @@ namespace datalog {
return false;
}
void rule_manager::eliminate_quantifier_body(app_ref_vector::element_ref& body, rule_ref_vector& rules, symbol const& name) {
quantifier* q;
if (is_forall(m, body.get(), q) && contains_predicate(q)) {
expr* e = q->get_expr();
if (!is_predicate(e)) {
ptr_vector<sort> sorts0, sorts1;
get_free_vars(e, sorts0);
expr_ref_vector args(m);
for (unsigned i = 0; i < sorts0.size(); ++i) {
if (sorts0[i]) {
args.push_back(m.mk_var(i,sorts0[i]));
sorts1.push_back(sorts0[i]);
}
}
app_ref head(m), fml(m);
func_decl_ref f(m);
f = m.mk_fresh_func_decl(name.str().c_str(),"", sorts1.size(), sorts1.c_ptr(), m.mk_bool_sort());
m_ctx.register_predicate(f);
head = m.mk_app(f, args.size(), args.c_ptr());
fml = m.mk_implies(e, head);
mk_rule_core(fml, rules, name);
// update the body to be the newly introduced head relation
body = m.mk_eq(m.mk_true(), m.update_quantifier(q, head));
}
}
}
void rule_manager::eliminate_quantifier_body(app_ref_vector& body, rule_ref_vector& rules, symbol const& name) {
for (unsigned i = 0; i < body.size(); ++i) {
app_ref_vector::element_ref t = body[i];
eliminate_quantifier_body(t, rules, name);
}
}
app_ref rule_manager::ensure_app(expr* e) {
SASSERT(m.is_bool(e));
@ -476,6 +422,7 @@ namespace datalog {
r->m_head = head;
r->m_name = name;
r->m_tail_size = n;
r->m_proof = 0;
m.inc_ref(r->m_head);
app * * uninterp_tail = r->m_tail; //grows upwards
@ -533,6 +480,11 @@ namespace datalog {
if (normalize) {
r->norm_vars(*this);
}
DEBUG_CODE(ptr_vector<sort> sorts;
::get_free_vars(head, sorts);
for (unsigned i = 0; i < n; ++i) {
::get_free_vars(tail[i], sorts);
});
return r;
}
@ -754,6 +706,27 @@ namespace datalog {
r->set_accounting_parent_object(m_ctx, old_r);
}
void rule_manager::mk_rule_rewrite_proof(rule& old_rule, rule& new_rule) {
if (&old_rule != &new_rule &&
!new_rule.get_proof() &&
old_rule.get_proof()) {
expr_ref fml(m);
new_rule.to_formula(fml);
scoped_proof _sc(m);
proof* p = m.mk_rewrite(m.get_fact(old_rule.get_proof()), fml);
new_rule.set_proof(m, m.mk_modus_ponens(old_rule.get_proof(), p));
}
}
void rule_manager::mk_rule_asserted_proof(rule& r) {
if (m_ctx.generate_proof_trace()) {
scoped_proof _scp(m);
expr_ref fml(m);
r.to_formula(fml);
r.set_proof(m, m.mk_asserted(fml));
}
}
void rule_manager::substitute(rule_ref& r, unsigned sz, expr*const* es) {
expr_ref tmp(m);
app_ref new_head(m);
@ -812,10 +785,23 @@ namespace datalog {
for (unsigned i = 0; i < n; i++) {
m.dec_ref(get_tail(i));
}
if (m_proof) {
m.dec_ref(m_proof);
}
this->~rule();
m.get_allocator().deallocate(get_obj_size(n), this);
}
void rule::set_proof(ast_manager& m, proof* p) {
if (p) {
m.inc_ref(p);
}
if (m_proof) {
m.dec_ref(m_proof);
}
m_proof = p;
}
bool rule::is_in_tail(const func_decl * p, bool only_positive) const {
unsigned len = only_positive ? get_positive_tail_size() : get_uninterpreted_tail_size();
for (unsigned i = 0; i < len; i++) {
@ -993,6 +979,9 @@ namespace datalog {
out << '}';
}
out << '\n';
if (m_proof) {
out << mk_pp(m_proof, m) << '\n';
}
}
void rule::to_formula(expr_ref& fml) const {

45
src/muz_qe/dl_rule.h
View file

@ -43,11 +43,9 @@ namespace datalog {
*/
class rule_manager
{
ast_manager& m;
context& m_ctx;
rule_counter m_counter;
obj_map<expr, app*> m_memoize_disj;
expr_ref_vector m_refs;
ast_manager& m;
context& m_ctx;
rule_counter m_counter;
// only the context can create a rule_manager
friend class context;
@ -57,19 +55,13 @@ namespace datalog {
/**
\brief Move functions from predicate tails into the interpreted tail by introducing new variables.
*/
void hoist_compound_predicates(unsigned num_bound, app_ref& head, app_ref_vector& body);
void hoist_compound(unsigned& num_bound, app_ref& fml, app_ref_vector& body);
void flatten_body(app_ref_vector& body);
void remove_labels(expr_ref& fml);
void eliminate_disjunctions(app_ref_vector::element_ref& body, rule_ref_vector& rules, symbol const& name);
void eliminate_disjunctions(app_ref_vector& body, rule_ref_vector& rules, symbol const& name);
void eliminate_quantifier_body(app_ref_vector::element_ref& body, rule_ref_vector& rules, symbol const& name);
void eliminate_quantifier_body(app_ref_vector& body, rule_ref_vector& rules, symbol const& name);
void remove_labels(expr_ref& fml, proof_ref& pr);
app_ref ensure_app(expr* e);
@ -81,6 +73,16 @@ namespace datalog {
void mk_rule_core(expr* fml, rule_ref_vector& rules, symbol const& name);
void mk_negations(app_ref_vector& body, svector<bool>& is_negated);
void mk_rule_core_new(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name);
void mk_rule_core2(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name);
static expr_ref mk_implies(app_ref_vector const& body, expr* head);
unsigned extract_horn(expr* fml, app_ref_vector& body, app_ref& head);
/**
\brief Perform cheap quantifier elimination to reduce the number of variables in the interpreted tail.
*/
@ -99,7 +101,7 @@ namespace datalog {
The formula is of the form (forall (...) (forall (...) (=> (and ...) head)))
*/
void mk_rule(expr* fml, rule_ref_vector& rules, symbol const& name = symbol::null);
void mk_rule(expr* fml, proof* p, rule_ref_vector& rules, symbol const& name = symbol::null);
/**
\brief Create a Datalog query from an expression.
@ -129,7 +131,15 @@ namespace datalog {
/** make sure there are not non-quantified variables that occur only in interpreted predicates */
void fix_unbound_vars(rule_ref& r, bool try_quantifier_elimination);
/**
\brief add proof that new rule is obtained by rewriting old rule.
*/
void mk_rule_rewrite_proof(rule& old_rule, rule& new_rule);
/**
\brief tag rule as asserted.
*/
void mk_rule_asserted_proof(rule& r);
/**
\brief apply substitution to variables of rule.
@ -168,6 +178,7 @@ namespace datalog {
friend class rule_manager;
app * m_head;
proof* m_proof;
unsigned m_tail_size:20;
// unsigned m_reserve:12;
unsigned m_ref_cnt;
@ -199,6 +210,10 @@ namespace datalog {
void get_used_vars(used_vars& uv) const;
public:
proof * get_proof() const { return m_proof; }
void set_proof(ast_manager& m, proof* p);
app * get_head() const { return m_head; }

4
src/muz_qe/dl_rule_transformer.cpp
View file

@ -73,7 +73,7 @@ namespace datalog {
m_dirty=true;
}
bool rule_transformer::operator()(rule_set & rules, model_converter_ref& mc, proof_converter_ref& pc) {
bool rule_transformer::operator()(rule_set & rules, model_converter_ref& mc) {
ensure_ordered();
bool modified = false;
@ -87,7 +87,7 @@ namespace datalog {
for(; it!=end && !m_cancel; ++it) {
plugin & p = **it;
rule_set * new_rules = p(rules, mc, pc);
rule_set * new_rules = p(rules, mc);
if (!new_rules) {
continue;
}

6
src/muz_qe/dl_rule_transformer.h
View file

@ -24,7 +24,6 @@ Revision History:
#include"dl_rule.h"
#include"dl_rule_set.h"
#include"model_converter.h"
#include"proof_converter.h"
namespace datalog {
@ -69,7 +68,7 @@ namespace datalog {
\brief Transform the rule set using the registered transformation plugins. If the rule
set has changed, return true; otherwise return false.
*/
bool operator()(rule_set & rules, model_converter_ref& mc, proof_converter_ref& pc);
bool operator()(rule_set & rules, model_converter_ref& mc);
};
class rule_transformer::plugin {
@ -106,8 +105,7 @@ namespace datalog {
The caller takes ownership of the returned \c rule_set object.
*/
virtual rule_set * operator()(rule_set const & source,
model_converter_ref& mc,
proof_converter_ref& pc) = 0;
model_converter_ref& mc) = 0;
virtual void cancel() { m_cancel = true; }

38
src/muz_qe/dl_util.cpp
View file

@ -511,6 +511,44 @@ namespace datalog {
pc->insert(pr);
}
void resolve_rule(rule const& r1, rule const& r2, unsigned idx,
expr_ref_vector const& s1, expr_ref_vector const& s2, rule& res) {
if (!r1.get_proof()) {
return;
}
SASSERT(r2.get_proof());
ast_manager& m = s1.get_manager();
expr_ref fml(m);
res.to_formula(fml);
vector<expr_ref_vector> substs;
svector<std::pair<unsigned, unsigned> > positions;
substs.push_back(s1);
substs.push_back(s2);
scoped_proof _sc(m);
proof_ref pr(m);
proof_ref_vector premises(m);
premises.push_back(r1.get_proof());
premises.push_back(r2.get_proof());
positions.push_back(std::make_pair(idx+1, 0));
TRACE("dl",
tout << premises[0]->get_id() << " " << mk_pp(premises[0].get(), m) << "\n";
for (unsigned i = 0; i < s1.size(); ++i) {
tout << mk_pp(s1[i], m) << " ";
}
tout << "\n";
tout << premises[1]->get_id() << " " << mk_pp(premises[1].get(), m) << "\n";
for (unsigned i = 0; i < s2.size(); ++i) {
tout << mk_pp(s2[i], m) << " ";
}
tout << "\n";
);
pr = m.mk_hyper_resolve(2, premises.c_ptr(), fml, positions, substs);
res.set_proof(m, pr);
}
class skip_model_converter : public model_converter {
public:
skip_model_converter() {}

3
src/muz_qe/dl_util.h
View file

@ -425,6 +425,9 @@ namespace datalog {
void resolve_rule(replace_proof_converter* pc, rule const& r1, rule const& r2, unsigned idx,
expr_ref_vector const& s1, expr_ref_vector const& s2, rule const& res);
void resolve_rule(rule const& r1, rule const& r2, unsigned idx,
expr_ref_vector const& s1, expr_ref_vector const& s2, rule& res);
model_converter* mk_skip_model_converter();
proof_converter* mk_skip_proof_converter();

18
src/muz_qe/equiv_proof_converter.cpp
View file

@ -22,12 +22,14 @@ Revision History:
#include "dl_util.h"
void equiv_proof_converter::insert(expr* fml1, expr* fml2) {
datalog::scoped_proof _sp(m);
proof_ref p1(m), p2(m), p3(m);
p1 = m.mk_asserted(fml1);
p2 = m.mk_rewrite(fml1, fml2);
p3 = m.mk_modus_ponens(p1, p2);
TRACE("proof_converter", tout << mk_pp(p3.get(), m) << "\n";);
SASSERT(m.has_fact(p3));
m_replace.insert(p3);
if (fml1 != fml2) {
datalog::scoped_proof _sp(m);
proof_ref p1(m), p2(m), p3(m);
p1 = m.mk_asserted(fml1);
p2 = m.mk_rewrite(fml1, fml2);
p3 = m.mk_modus_ponens(p1, p2);
TRACE("proof_converter", tout << mk_pp(p3.get(), m) << "\n";);
SASSERT(m.has_fact(p3));
m_replace.insert(p3);
}
}

14
src/muz_qe/horn_tactic.cpp
View file

@ -113,8 +113,8 @@ class horn_tactic : public tactic {
todo.append(to_app(a)->get_num_args(), to_app(a)->get_args());
}
else if (m.is_ite(a)) {
todo.append(to_app(a)->get_arg(1));
todo.append(to_app(a)->get_arg(2));
todo.push_back(to_app(a)->get_arg(1));
todo.push_back(to_app(a)->get_arg(2));
}
else if (is_predicate(a)) {
register_predicate(a);
@ -270,20 +270,10 @@ class horn_tactic : public tactic {
proof_converter_ref & pc) {
expr_ref fml(m);
bool produce_models = g->models_enabled();
bool produce_proofs = g->proofs_enabled();
if (produce_models) {
mc = datalog::mk_skip_model_converter();
}
if (produce_proofs) {
pc = datalog::mk_skip_proof_converter();
}
func_decl* query_pred = to_app(q)->get_decl();
m_ctx.set_output_predicate(query_pred);
m_ctx.set_model_converter(mc);
m_ctx.set_proof_converter(pc);
m_ctx.get_rules(); // flush adding rules.
m_ctx.apply_default_transformation();

49
src/muz_qe/pdr_context.cpp
View file

@ -950,16 +950,45 @@ namespace pdr {
return out;
}
/**
\brief Ensure that all nodes in the tree have associated models.
get_trace and get_proof_trace rely on models to extract rules.
*/
void model_search::update_models() {
obj_map<expr, model*> models;
ptr_vector<model_node> todo;
todo.push_back(m_root);
while (!todo.empty()) {
model_node* n = todo.back();
if (n->get_model_ptr()) {
models.insert(n->state(), n->get_model_ptr());
}
todo.pop_back();
todo.append(n->children().size(), n->children().c_ptr());
}
todo.push_back(m_root);
while (!todo.empty()) {
model_node* n = todo.back();
model* md = 0;
if (!n->get_model_ptr() && models.find(n->state(), md)) {
model_ref mr(md);
n->set_model(mr);
}
todo.pop_back();
todo.append(n->children().size(), n->children().c_ptr());
}
}
/**
Extract trace comprising of constraints
and predicates that are satisfied from facts to the query.
The resulting trace
*/
expr_ref model_search::get_trace(context const& ctx) const {
expr_ref model_search::get_trace(context const& ctx) {
pred_transformer& pt = get_root().pt();
ast_manager& m = pt.get_manager();
manager& pm = pt.get_pdr_manager();
datalog::context& dctx = ctx.get_context();
datalog::rule_manager& rm = dctx.get_rule_manager();
expr_ref_vector constraints(m), predicates(m);
@ -974,13 +1003,15 @@ namespace pdr {
rule = n->get_rule();
unsigned max_var = vc.get_max_rule_var(*rule);
predicates.push_back(rule->get_head());
children.append(n);
children.push_back(n);
bool first = true;
update_models();
while (!children.empty()) {
SASSERT(children.size() == predicates.size());
expr_ref_vector binding(m);
n = children.back();
children.pop_back();
TRACE("pdr", n->display(tout, 0););
n->mk_instantiate(r0, rule, binding);
max_var = std::max(max_var, vc.get_max_rule_var(*rule));
@ -1026,7 +1057,7 @@ namespace pdr {
return pm.mk_and(constraints);
}
proof_ref model_search::get_proof_trace(context const& ctx) const {
proof_ref model_search::get_proof_trace(context const& ctx) {
pred_transformer& pt = get_root().pt();
ast_manager& m = pt.get_manager();
datalog::context& dctx = ctx.get_context();
@ -1042,8 +1073,10 @@ namespace pdr {
proof* pr = 0;
unifier.set_normalize(false);
todo.push_back(m_root);
update_models();
while (!todo.empty()) {
model_node* n = todo.back();
TRACE("pdr", n->display(tout, 0););
if (cache.find(n->state(), pr)) {
todo.pop_back();
continue;
@ -1066,12 +1099,14 @@ namespace pdr {
continue;
}
proof_ref rl(m);
expr_ref fml0(m);
expr_ref_vector binding(m);
n->mk_instantiate(r0, r1, binding);
r0->to_formula(fml0);
proof_ref p1(m), p2(m);
p1 = m.mk_asserted(fml0);
p1 = r0->get_proof();
if (!p1) {
r0->display(dctx, std::cout);
}
SASSERT(p1);
pfs[0] = p1;
rls[0] = r1;
TRACE("pdr",

7
src/muz_qe/pdr_context.h
View file

@ -240,6 +240,7 @@ namespace pdr {
void erase_leaf(model_node& n);
void remove_node(model_node& n);
void enqueue_leaf(model_node& n); // add leaf to priority queue.
void update_models();
public:
model_search(bool bfs): m_bfs(bfs), m_root(0) {}
~model_search();
@ -253,8 +254,8 @@ namespace pdr {
void set_root(model_node* n);
model_node& get_root() const { return *m_root; }
std::ostream& display(std::ostream& out) const;
expr_ref get_trace(context const& ctx) const;
proof_ref get_proof_trace(context const& ctx) const;
expr_ref get_trace(context const& ctx);
proof_ref get_proof_trace(context const& ctx);
void backtrack_level(bool uses_level, model_node& n);
};
@ -299,7 +300,7 @@ namespace pdr {
decl2rel m_rels; // Map from relation predicate to fp-operator.
func_decl_ref m_query_pred;
pred_transformer* m_query;
model_search m_search;
mutable model_search m_search;
lbool m_last_result;
unsigned m_inductive_lvl;
ptr_vector<core_generalizer> m_core_generalizers;

13
src/muz_qe/pdr_dl_interface.cpp
View file

@ -85,6 +85,7 @@ lbool dl_interface::query(expr * query) {
m_pred2slice.reset();
ast_manager& m = m_ctx.get_manager();
datalog::rule_manager& rule_manager = m_ctx.get_rule_manager();
datalog::rule_set old_rules(m_ctx.get_rules());
func_decl_ref query_pred(m);
datalog::rule_ref_vector query_rules(rule_manager);
@ -105,14 +106,8 @@ lbool dl_interface::query(expr * query) {
m_ctx.display_rules(tout);
);
model_converter_ref mc = datalog::mk_skip_model_converter();
proof_converter_ref pc;
if (m_ctx.get_params().generate_proof_trace()) {
pc = datalog::mk_skip_proof_converter();
}
m_ctx.set_output_predicate(query_pred);
m_ctx.set_model_converter(mc);
m_ctx.set_proof_converter(pc);
m_ctx.apply_default_transformation();
if (m_ctx.get_params().slice()) {
@ -164,8 +159,8 @@ lbool dl_interface::query(expr * query) {
datalog::scoped_restore_proof _sc(m); // update_rules may overwrite the proof mode.
m_context->set_proof_converter(pc);
m_context->set_model_converter(mc);
m_context->set_proof_converter(m_ctx.get_proof_converter());
m_context->set_model_converter(m_ctx.get_model_converter());
m_context->set_query(query_pred);
m_context->set_axioms(bg_assertion);
m_context->update_rules(m_pdr_rules);

6
src/muz_qe/pdr_generalizers.cpp
View file

@ -228,11 +228,13 @@ namespace pdr {
is_lower = !is_lower;
}
vector<term_loc_t> bound;
bound.push_back(std::make_pair(x, i));
if (is_lower) {
m_lb.insert(abs(r), std::make_pair(x, i));
m_lb.insert(abs(r), bound);
}
else {
m_ub.insert(abs(r), std::make_pair(x, i));
m_ub.insert(abs(r), bound);
}
}

8
src/muz_qe/qe_lite.cpp
View file

@ -2492,7 +2492,13 @@ class qe_lite_tactic : public tactic {
new_f = f;
m_qe(new_f, new_pr);
if (produce_proofs) {
new_pr = m.mk_modus_ponens(g->pr(i), new_pr);
expr* fact = m.get_fact(new_pr);
if (to_app(fact)->get_arg(0) != to_app(fact)->get_arg(1)) {
new_pr = m.mk_modus_ponens(g->pr(i), new_pr);
}
else {
new_pr = g->pr(i);
}
}
g->update(i, new_f, new_pr, g->dep(i));
}

13
src/muz_qe/tab_context.cpp
View file

@ -1644,9 +1644,7 @@ namespace datalog {
void resolve_rule(replace_proof_converter& pc, tb::clause const& r1, tb::clause const& r2,
expr_ref_vector const& s1, expr_ref_vector const& s2, tb::clause const& res) const {
unsigned idx = r1.get_predicate_index();
expr_ref fml1 = r1.to_formula();
expr_ref fml2 = r2.to_formula();
expr_ref fml3 = res.to_formula();
expr_ref fml = res.to_formula();
vector<expr_ref_vector> substs;
svector<std::pair<unsigned, unsigned> > positions;
substs.push_back(s1);
@ -1654,13 +1652,12 @@ namespace datalog {
scoped_proof _sc(m);
proof_ref pr(m);
proof_ref_vector premises(m);
premises.push_back(m.mk_asserted(fml1));
premises.push_back(m.mk_asserted(fml2));
premises.push_back(m.mk_asserted(r1.to_formula()));
premises.push_back(m.mk_asserted(r2.to_formula()));
positions.push_back(std::make_pair(idx+1, 0));
pr = m.mk_hyper_resolve(2, premises.c_ptr(), fml3, positions, substs);
pr = m.mk_hyper_resolve(2, premises.c_ptr(), fml, positions, substs);
pc.insert(pr);
}
}
};
tab::tab(context& ctx):

17
src/util/vector.h
View file

@ -151,23 +151,6 @@ public:
}
}
vector(T const & e) :
m_data(0) {
push_back(e);
}
vector(T const & t1, T const & t2) :
m_data(0) {
push_back(t1);
push_back(t2);
}
vector(T const & t1, T const & t2, T const & t3) :
m_data(0) {
push_back(t1);
push_back(t2);
push_back(t3);
}
~vector() {
destroy();