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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/quantifiers/ematching/instantiation_engine.cpp	Lines:	116	129	89.9 %
Date:	2021-11-07	Branches:	177	364	48.6 %


/******************************************************************************
 * Top contributors (to current version):
 *   Andrew Reynolds, Morgan Deters, Tim King
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * Implementation of instantiation engine class
 */

#include "theory/quantifiers/ematching/instantiation_engine.h"

#include "options/quantifiers_options.h"
#include "theory/quantifiers/ematching/inst_strategy_e_matching.h"
#include "theory/quantifiers/ematching/inst_strategy_e_matching_user.h"
#include "theory/quantifiers/ematching/trigger.h"
#include "theory/quantifiers/first_order_model.h"
#include "theory/quantifiers/quantifiers_attributes.h"
#include "theory/quantifiers/term_database.h"
#include "theory/quantifiers/term_util.h"

using namespace cvc5::kind;
using namespace cvc5::context;
using namespace cvc5::theory::quantifiers::inst;

namespace cvc5 {
namespace theory {
namespace quantifiers {

InstantiationEngine::InstantiationEngine(Env& env,
                                         QuantifiersState& qs,
                                         QuantifiersInferenceManager& qim,
                                         QuantifiersRegistry& qr,
                                         TermRegistry& tr)
    : QuantifiersModule(env, qs, qim, qr, tr),
      d_instStrategies(),
      d_isup(),
      d_i_ag(),
      d_quants(),
      d_trdb(d_env, qs, qim, qr, tr),
      d_quant_rel(nullptr)
{
  if (options().quantifiers.relevantTriggers)
  {
    d_quant_rel.reset(new quantifiers::QuantRelevance(env));
  }
  if (options().quantifiers.eMatching)
  {
    // these are the instantiation strategies for E-matching
    // user-provided patterns
    if (options().quantifiers.userPatternsQuant != options::UserPatMode::IGNORE)
    {
      d_isup.reset(
          new InstStrategyUserPatterns(d_env, d_trdb, qs, qim, qr, tr));
      d_instStrategies.push_back(d_isup.get());
    }

    // auto-generated patterns
    d_i_ag.reset(new InstStrategyAutoGenTriggers(
        d_env, d_trdb, qs, qim, qr, tr, d_quant_rel.get()));
    d_instStrategies.push_back(d_i_ag.get());
  }
}

InstantiationEngine::~InstantiationEngine() {}

void InstantiationEngine::presolve() {
  for( unsigned i=0; i<d_instStrategies.size(); ++i ){
    d_instStrategies[i]->presolve();
  }
}

void InstantiationEngine::doInstantiationRound( Theory::Effort effort ){
  size_t lastWaiting = d_qim.numPendingLemmas();
  //iterate over an internal effort level e
  int e = 0;
  int eLimit = effort==Theory::EFFORT_LAST_CALL ? 10 : 2;
  bool finished = false;
  //while unfinished, try effort level=0,1,2....
  while( !finished && e<=eLimit ){
    Debug("inst-engine") << "IE: Prepare instantiation (" << e << ")." << std::endl;
    finished = true;
    //instantiate each quantifier
    for( unsigned i=0; i<d_quants.size(); i++ ){
      Node q = d_quants[i];
      Debug("inst-engine-debug") << "IE: Instantiate " << q << "..." << std::endl;
      //int e_use = d_quantEngine->getRelevance( q )==-1 ? e - 1 : e;
      int e_use = e;
      if( e_use>=0 ){
        Trace("inst-engine-debug") << "inst-engine : " << q << std::endl;
        //check each instantiation strategy
        for( unsigned j=0; j<d_instStrategies.size(); j++ ){
          InstStrategy* is = d_instStrategies[j];
          Trace("inst-engine-debug") << "Do " << is->identify() << " " << e_use << std::endl;
          InstStrategyStatus quantStatus = is->process(q, effort, e_use);
          Trace("inst-engine-debug")
              << " -> unfinished= "
              << (quantStatus == InstStrategyStatus::STATUS_UNFINISHED)
              << ", conflict=" << d_qstate.isInConflict() << std::endl;
          if (d_qstate.isInConflict())
          {
            return;
          }
          else if (quantStatus == InstStrategyStatus::STATUS_UNFINISHED)
          {
            finished = false;
          }
        }
      }
    }
    //do not consider another level if already added lemma at this level
    if (d_qim.numPendingLemmas() > lastWaiting)
    {
      finished = true;
    }
    e++;
  }
}

bool InstantiationEngine::needsCheck( Theory::Effort e ){
  return d_qstate.getInstWhenNeedsCheck(e);
}

void InstantiationEngine::reset_round( Theory::Effort e ){
  //if not, proceed to instantiation round
  //reset the instantiation strategies
  for( unsigned i=0; i<d_instStrategies.size(); ++i ){
    InstStrategy* is = d_instStrategies[i];
    is->processResetInstantiationRound( e );
  }
}

void InstantiationEngine::check(Theory::Effort e, QEffort quant_e)
{
  CodeTimer codeTimer(d_qstate.getStats().d_ematching_time);
  if (quant_e != QEFFORT_STANDARD)
  {
    return;
  }
  double clSet = 0;
  if (Trace.isOn("inst-engine"))
  {
    clSet = double(clock()) / double(CLOCKS_PER_SEC);
    Trace("inst-engine") << "---Instantiation Engine Round, effort = " << e
                         << "---" << std::endl;
  }
  // collect all active quantified formulas belonging to this
  bool quantActive = false;
  d_quants.clear();
  FirstOrderModel* m = d_treg.getModel();
  size_t nquant = m->getNumAssertedQuantifiers();
  for (size_t i = 0; i < nquant; i++)
  {
    Node q = m->getAssertedQuantifier(i, true);
    if (shouldProcess(q) && m->isQuantifierActive(q))
    {
      quantActive = true;
      d_quants.push_back(q);
    }
  }
  Trace("inst-engine-debug")
      << "InstEngine: check: # asserted quantifiers " << d_quants.size() << "/";
  Trace("inst-engine-debug") << nquant << " " << quantActive << std::endl;
  if (quantActive)
  {
    size_t lastWaiting = d_qim.numPendingLemmas();
    doInstantiationRound(e);
    if (d_qstate.isInConflict())
    {
      Assert(d_qim.numPendingLemmas() > lastWaiting);
      Trace("inst-engine") << "Conflict, added lemmas = "
                           << (d_qim.numPendingLemmas() - lastWaiting)
                           << std::endl;
    }
    else if (d_qim.hasPendingLemma())
    {
      Trace("inst-engine") << "Added lemmas = "
                           << (d_qim.numPendingLemmas() - lastWaiting)
                           << std::endl;
    }
  }
  else
  {
    d_quants.clear();
  }
  if (Trace.isOn("inst-engine"))
  {
    double clSet2 = double(clock()) / double(CLOCKS_PER_SEC);
    Trace("inst-engine") << "Finished instantiation engine, time = "
                         << (clSet2 - clSet) << std::endl;
  }
}

bool InstantiationEngine::checkCompleteFor( Node q ) {
  //TODO?
  return false;
}

void InstantiationEngine::checkOwnership(Node q)
{
  if (options().quantifiers.userPatternsQuant == options::UserPatMode::STRICT
      && q.getNumChildren() == 3)
  {
    //if strict triggers, take ownership of this quantified formula
    if (QuantAttributes::hasPattern(q))
    {
      d_qreg.setOwner(q, this, 1);
    }
  }
}

void InstantiationEngine::registerQuantifier(Node q)
{
  if (!shouldProcess(q))
  {
    return;
  }
  if (d_quant_rel)
  {
    d_quant_rel->registerQuantifier(q);
  }
  // take into account user patterns
  if (q.getNumChildren() == 3)
  {
    Node subsPat = d_qreg.substituteBoundVariablesToInstConstants(q[2], q);
    // add patterns
    for (const Node& p : subsPat)
    {
      if (p.getKind() == INST_PATTERN)
      {
        addUserPattern(q, p);
      }
      else if (p.getKind() == INST_NO_PATTERN)
      {
        addUserNoPattern(q, p);
      }
    }
  }
}

void InstantiationEngine::addUserPattern(Node q, Node pat) {
  if (d_isup) {
    d_isup->addUserPattern(q, pat);
  }
}

void InstantiationEngine::addUserNoPattern(Node q, Node pat) {
  if (d_i_ag) {
    d_i_ag->addUserNoPattern(q, pat);
  }
}

bool InstantiationEngine::shouldProcess(Node q)
{
  if (!d_qreg.hasOwnership(q, this))
  {
    return false;
  }
  // also ignore internal quantifiers
  QuantAttributes& qattr = d_qreg.getQuantAttributes();
  if (qattr.isQuantBounded(q))
  {
    return false;
  }
  return true;
}

}  // namespace quantifiers
}  // namespace theory
}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Andrew Reynolds, Morgan Deters, Tim King
4		*
5		* This file is part of the cvc5 project.
6		*
7		* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
8		* in the top-level source directory and their institutional affiliations.
9		* All rights reserved. See the file COPYING in the top-level source
10		* directory for licensing information.
11		* ****************************************************************************
12		*
13		* Implementation of instantiation engine class
14		*/
15
16		#include "theory/quantifiers/ematching/instantiation_engine.h"
17
18		#include "options/quantifiers_options.h"
19		#include "theory/quantifiers/ematching/inst_strategy_e_matching.h"
20		#include "theory/quantifiers/ematching/inst_strategy_e_matching_user.h"
21		#include "theory/quantifiers/ematching/trigger.h"
22		#include "theory/quantifiers/first_order_model.h"
23		#include "theory/quantifiers/quantifiers_attributes.h"
24		#include "theory/quantifiers/term_database.h"
25		#include "theory/quantifiers/term_util.h"
26
27		using namespace cvc5::kind;
28		using namespace cvc5::context;
29		using namespace cvc5::theory::quantifiers::inst;
30
31		namespace cvc5 {
32		namespace theory {
33		namespace quantifiers {
34
35	11880	InstantiationEngine::InstantiationEngine(Env& env,
36		QuantifiersState& qs,
37		QuantifiersInferenceManager& qim,
38		QuantifiersRegistry& qr,
39	11880	TermRegistry& tr)
40		: QuantifiersModule(env, qs, qim, qr, tr),
41		d_instStrategies(),
42		d_isup(),
43		d_i_ag(),
44		d_quants(),
45		d_trdb(d_env, qs, qim, qr, tr),
46	11880	d_quant_rel(nullptr)
47		{
48	11880	if (options().quantifiers.relevantTriggers)
49		{
50	4	d_quant_rel.reset(new quantifiers::QuantRelevance(env));
51		}
52	11880	if (options().quantifiers.eMatching)
53		{
54		// these are the instantiation strategies for E-matching
55		// user-provided patterns
56	11877	if (options().quantifiers.userPatternsQuant != options::UserPatMode::IGNORE)
57		{
58	23754	d_isup.reset(
59	11877	new InstStrategyUserPatterns(d_env, d_trdb, qs, qim, qr, tr));
60	11877	d_instStrategies.push_back(d_isup.get());
61		}
62
63		// auto-generated patterns
64	23754	d_i_ag.reset(new InstStrategyAutoGenTriggers(
65	11877	d_env, d_trdb, qs, qim, qr, tr, d_quant_rel.get()));
66	11877	d_instStrategies.push_back(d_i_ag.get());
67		}
68	11880	}
69
70	23750	InstantiationEngine::~InstantiationEngine() {}
71
72	13147	void InstantiationEngine::presolve() {
73	39435	for( unsigned i=0; i<d_instStrategies.size(); ++i ){
74	26288	d_instStrategies[i]->presolve();
75		}
76	13147	}
77
78	2301	void InstantiationEngine::doInstantiationRound( Theory::Effort effort ){
79	2301	size_t lastWaiting = d_qim.numPendingLemmas();
80		//iterate over an internal effort level e
81	2301	int e = 0;
82	2301	int eLimit = effort==Theory::EFFORT_LAST_CALL ? 10 : 2;
83	2301	bool finished = false;
84		//while unfinished, try effort level=0,1,2....
85	11513	while( !finished && e<=eLimit ){
86	4606	Debug("inst-engine") << "IE: Prepare instantiation (" << e << ")." << std::endl;
87	4606	finished = true;
88		//instantiate each quantifier
89	91064	for( unsigned i=0; i<d_quants.size(); i++ ){
90	172916	Node q = d_quants[i];
91	86458	Debug("inst-engine-debug") << "IE: Instantiate " << q << "..." << std::endl;
92		//int e_use = d_quantEngine->getRelevance( q )==-1 ? e - 1 : e;
93	86458	int e_use = e;
94	86458	if( e_use>=0 ){
95	86458	Trace("inst-engine-debug") << "inst-engine : " << q << std::endl;
96		//check each instantiation strategy
97	259374	for( unsigned j=0; j<d_instStrategies.size(); j++ ){
98	172916	InstStrategy* is = d_instStrategies[j];
99	172916	Trace("inst-engine-debug") << "Do " << is->identify() << " " << e_use << std::endl;
100	172916	InstStrategyStatus quantStatus = is->process(q, effort, e_use);
101	345832	Trace("inst-engine-debug")
102	172916	<< " -> unfinished= "
103	345832	<< (quantStatus == InstStrategyStatus::STATUS_UNFINISHED)
104	172916	<< ", conflict=" << d_qstate.isInConflict() << std::endl;
105	172916	if (d_qstate.isInConflict())
106		{
107		return;
108		}
109	172916	else if (quantStatus == InstStrategyStatus::STATUS_UNFINISHED)
110		{
111	72853	finished = false;
112		}
113		}
114		}
115		}
116		//do not consider another level if already added lemma at this level
117	4606	if (d_qim.numPendingLemmas() > lastWaiting)
118		{
119	1335	finished = true;
120		}
121	4606	e++;
122		}
123		}
124
125	82235	bool InstantiationEngine::needsCheck( Theory::Effort e ){
126	82235	return d_qstate.getInstWhenNeedsCheck(e);
127		}
128
129	30680	void InstantiationEngine::reset_round( Theory::Effort e ){
130		//if not, proceed to instantiation round
131		//reset the instantiation strategies
132	92028	for( unsigned i=0; i<d_instStrategies.size(); ++i ){
133	61348	InstStrategy* is = d_instStrategies[i];
134	61348	is->processResetInstantiationRound( e );
135		}
136	30680	}
137
138	58888	void InstantiationEngine::check(Theory::Effort e, QEffort quant_e)
139		{
140	77976	CodeTimer codeTimer(d_qstate.getStats().d_ematching_time);
141	58888	if (quant_e != QEFFORT_STANDARD)
142		{
143	39800	return;
144		}
145	19088	double clSet = 0;
146	19088	if (Trace.isOn("inst-engine"))
147		{
148		clSet = double(clock()) / double(CLOCKS_PER_SEC);
149		Trace("inst-engine") << "---Instantiation Engine Round, effort = " << e
150		<< "---" << std::endl;
151		}
152		// collect all active quantified formulas belonging to this
153	19088	bool quantActive = false;
154	19088	d_quants.clear();
155	19088	FirstOrderModel* m = d_treg.getModel();
156	19088	size_t nquant = m->getNumAssertedQuantifiers();
157	85264	for (size_t i = 0; i < nquant; i++)
158		{
159	132352	Node q = m->getAssertedQuantifier(i, true);
160	66176	if (shouldProcess(q) && m->isQuantifierActive(q))
161		{
162	43227	quantActive = true;
163	43227	d_quants.push_back(q);
164		}
165		}
166	38176	Trace("inst-engine-debug")
167	19088	<< "InstEngine: check: # asserted quantifiers " << d_quants.size() << "/";
168	19088	Trace("inst-engine-debug") << nquant << " " << quantActive << std::endl;
169	19088	if (quantActive)
170		{
171	2301	size_t lastWaiting = d_qim.numPendingLemmas();
172	2301	doInstantiationRound(e);
173	2301	if (d_qstate.isInConflict())
174		{
175		Assert(d_qim.numPendingLemmas() > lastWaiting);
176		Trace("inst-engine") << "Conflict, added lemmas = "
177		<< (d_qim.numPendingLemmas() - lastWaiting)
178		<< std::endl;
179		}
180	2301	else if (d_qim.hasPendingLemma())
181		{
182	2670	Trace("inst-engine") << "Added lemmas = "
183	2670	<< (d_qim.numPendingLemmas() - lastWaiting)
184	1335	<< std::endl;
185		}
186		}
187		else
188		{
189	16787	d_quants.clear();
190		}
191	19088	if (Trace.isOn("inst-engine"))
192		{
193		double clSet2 = double(clock()) / double(CLOCKS_PER_SEC);
194		Trace("inst-engine") << "Finished instantiation engine, time = "
195		<< (clSet2 - clSet) << std::endl;
196		}
197		}
198
199	652	bool InstantiationEngine::checkCompleteFor( Node q ) {
200		//TODO?
201	652	return false;
202		}
203
204	23848	void InstantiationEngine::checkOwnership(Node q)
205		{
206	47696	if (options().quantifiers.userPatternsQuant == options::UserPatMode::STRICT
207	23848	&& q.getNumChildren() == 3)
208		{
209		//if strict triggers, take ownership of this quantified formula
210		if (QuantAttributes::hasPattern(q))
211		{
212		d_qreg.setOwner(q, this, 1);
213		}
214		}
215	23848	}
216
217	23848	void InstantiationEngine::registerQuantifier(Node q)
218		{
219	23848	if (!shouldProcess(q))
220		{
221	3965	return;
222		}
223	19883	if (d_quant_rel)
224		{
225	344	d_quant_rel->registerQuantifier(q);
226		}
227		// take into account user patterns
228	19883	if (q.getNumChildren() == 3)
229		{
230	8000	Node subsPat = d_qreg.substituteBoundVariablesToInstConstants(q[2], q);
231		// add patterns
232	8436	for (const Node& p : subsPat)
233		{
234	4436	if (p.getKind() == INST_PATTERN)
235		{
236	3904	addUserPattern(q, p);
237		}
238	532	else if (p.getKind() == INST_NO_PATTERN)
239		{
240	8	addUserNoPattern(q, p);
241		}
242		}
243		}
244		}
245
246	3904	void InstantiationEngine::addUserPattern(Node q, Node pat) {
247	3904	if (d_isup) {
248	3904	d_isup->addUserPattern(q, pat);
249		}
250	3904	}
251
252	8	void InstantiationEngine::addUserNoPattern(Node q, Node pat) {
253	8	if (d_i_ag) {
254	8	d_i_ag->addUserNoPattern(q, pat);
255		}
256	8	}
257
258	90024	bool InstantiationEngine::shouldProcess(Node q)
259		{
260	90024	if (!d_qreg.hasOwnership(q, this))
261		{
262	23453	return false;
263		}
264		// also ignore internal quantifiers
265	66571	QuantAttributes& qattr = d_qreg.getQuantAttributes();
266	66571	if (qattr.isQuantBounded(q))
267		{
268	3444	return false;
269		}
270	63127	return true;
271		}
272
273		} // namespace quantifiers
274		} // namespace theory
275	31137	} // namespace cvc5