Head

GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/sets/theory_sets.cpp	Lines:	100	109	91.7 %
Date:	2021-11-07	Branches:	138	310	44.5 %


/******************************************************************************
 * Top contributors (to current version):
 *   Andrew Reynolds, Kshitij Bansal, Andres Noetzli
 *
 * 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.
 * ****************************************************************************
 *
 * Sets theory.
 */

#include "theory/sets/theory_sets.h"

#include "options/sets_options.h"
#include "theory/sets/theory_sets_private.h"
#include "theory/sets/theory_sets_rewriter.h"
#include "theory/theory_model.h"
#include "theory/trust_substitutions.h"

using namespace cvc5::kind;

namespace cvc5 {
namespace theory {
namespace sets {

TheorySets::TheorySets(Env& env, OutputChannel& out, Valuation valuation)
    : Theory(THEORY_SETS, env, out, valuation),
      d_skCache(env.getRewriter()),
      d_state(env, valuation, d_skCache),
      d_im(env, *this, d_state),
      d_internal(
          new TheorySetsPrivate(env, *this, d_state, d_im, d_skCache, d_pnm)),
      d_notify(*d_internal.get(), d_im)
{
  // use the official theory state and inference manager objects
  d_theoryState = &d_state;
  d_inferManager = &d_im;
}

TheorySets::~TheorySets()
{
}

TheoryRewriter* TheorySets::getTheoryRewriter()
{
  return d_internal->getTheoryRewriter();
}

ProofRuleChecker* TheorySets::getProofChecker() { return nullptr; }

bool TheorySets::needsEqualityEngine(EeSetupInfo& esi)
{
  esi.d_notify = &d_notify;
  esi.d_name = "theory::sets::ee";
  esi.d_notifyNewClass = true;
  esi.d_notifyMerge = true;
  esi.d_notifyDisequal = true;
  return true;
}

void TheorySets::finishInit()
{
  Assert(d_equalityEngine != nullptr);

  d_valuation.setUnevaluatedKind(COMPREHENSION);
  // choice is used to eliminate witness
  d_valuation.setUnevaluatedKind(WITNESS);
  // Universe set is not evaluated. This is moreover important for ensuring that
  // we do not eliminate terms whose value involves the universe set.
  d_valuation.setUnevaluatedKind(UNIVERSE_SET);

  // functions we are doing congruence over
  d_equalityEngine->addFunctionKind(SINGLETON);
  d_equalityEngine->addFunctionKind(UNION);
  d_equalityEngine->addFunctionKind(INTERSECTION);
  d_equalityEngine->addFunctionKind(SETMINUS);
  d_equalityEngine->addFunctionKind(MEMBER);
  d_equalityEngine->addFunctionKind(SUBSET);
  // relation operators
  d_equalityEngine->addFunctionKind(PRODUCT);
  d_equalityEngine->addFunctionKind(JOIN);
  d_equalityEngine->addFunctionKind(TRANSPOSE);
  d_equalityEngine->addFunctionKind(TCLOSURE);
  d_equalityEngine->addFunctionKind(JOIN_IMAGE);
  d_equalityEngine->addFunctionKind(IDEN);
  d_equalityEngine->addFunctionKind(APPLY_CONSTRUCTOR);
  // we do congruence over cardinality
  d_equalityEngine->addFunctionKind(CARD);

  // finish initialization internally
  d_internal->finishInit();
}

void TheorySets::postCheck(Effort level) { d_internal->postCheck(level); }

void TheorySets::notifyFact(TNode atom,
                            bool polarity,
                            TNode fact,
                            bool isInternal)
{
  d_internal->notifyFact(atom, polarity, fact);
}

bool TheorySets::collectModelValues(TheoryModel* m,
                                    const std::set<Node>& termSet)
{
  return d_internal->collectModelValues(m, termSet);
}

void TheorySets::computeCareGraph() {
  d_internal->computeCareGraph();
}

TrustNode TheorySets::explain(TNode node)
{
  Node exp = d_internal->explain(node);
  return TrustNode::mkTrustPropExp(node, exp, nullptr);
}

Node TheorySets::getModelValue(TNode node) {
  return Node::null();
}

void TheorySets::preRegisterTerm(TNode node)
{
  d_internal->preRegisterTerm(node);
}

TrustNode TheorySets::ppRewrite(TNode n, std::vector<SkolemLemma>& lems)
{
  Kind nk = n.getKind();
  if (nk == UNIVERSE_SET || nk == COMPLEMENT || nk == JOIN_IMAGE
      || nk == COMPREHENSION)
  {
    if (!options().sets.setsExt)
    {
      std::stringstream ss;
      ss << "Extended set operators are not supported in default mode, try "
            "--sets-ext.";
      throw LogicException(ss.str());
    }
  }
  if (nk == COMPREHENSION)
  {
    // set comprehension is an implicit quantifier, require it in the logic
    if (!logicInfo().isQuantified())
    {
      std::stringstream ss;
      ss << "Set comprehensions require quantifiers in the background logic.";
      throw LogicException(ss.str());
    }
  }
  return d_internal->ppRewrite(n, lems);
}

Theory::PPAssertStatus TheorySets::ppAssert(
    TrustNode tin, TrustSubstitutionMap& outSubstitutions)
{
  TNode in = tin.getNode();
  Debug("sets-proc") << "ppAssert : " << in << std::endl;
  Theory::PPAssertStatus status = Theory::PP_ASSERT_STATUS_UNSOLVED;

  // this is based off of Theory::ppAssert
  if (in.getKind() == EQUAL)
  {
    if (in[0].isVar() && isLegalElimination(in[0], in[1]))
    {
      // We cannot solve for sets if setsExt is enabled, since universe set
      // may appear when this option is enabled, and solving for such a set
      // impacts the semantics of universe set, see
      // regress0/sets/pre-proc-univ.smt2
      if (!in[0].getType().isSet() || !options().sets.setsExt)
      {
        outSubstitutions.addSubstitutionSolved(in[0], in[1], tin);
        status = Theory::PP_ASSERT_STATUS_SOLVED;
      }
    }
    else if (in[1].isVar() && isLegalElimination(in[1], in[0]))
    {
      if (!in[0].getType().isSet() || !options().sets.setsExt)
      {
        outSubstitutions.addSubstitutionSolved(in[1], in[0], tin);
        status = Theory::PP_ASSERT_STATUS_SOLVED;
      }
    }
    else if (in[0].isConst() && in[1].isConst())
    {
      if (in[0] != in[1])
      {
        status = Theory::PP_ASSERT_STATUS_CONFLICT;
      }
    }
  }
  return status;
}

void TheorySets::presolve() {
  d_internal->presolve();
}

bool TheorySets::isEntailed( Node n, bool pol ) {
  return d_internal->isEntailed( n, pol );
}

/**************************** eq::NotifyClass *****************************/

void TheorySets::NotifyClass::eqNotifyNewClass(TNode t)
{
  Debug("sets-eq") << "[sets-eq] eqNotifyNewClass:"
                   << " t = " << t << std::endl;
  d_theory.eqNotifyNewClass(t);
}

void TheorySets::NotifyClass::eqNotifyMerge(TNode t1, TNode t2)
{
  Debug("sets-eq") << "[sets-eq] eqNotifyMerge:"
                   << " t1 = " << t1 << " t2 = " << t2 << std::endl;
  d_theory.eqNotifyMerge(t1, t2);
}

void TheorySets::NotifyClass::eqNotifyDisequal(TNode t1, TNode t2, TNode reason)
{
  Debug("sets-eq") << "[sets-eq] eqNotifyDisequal:"
                   << " t1 = " << t1 << " t2 = " << t2 << " reason = " << reason
                   << std::endl;
  d_theory.eqNotifyDisequal(t1, t2, reason);
}

}  // namespace sets
}  // namespace theory
}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Andrew Reynolds, Kshitij Bansal, Andres Noetzli
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		* Sets theory.
14		*/
15
16		#include "theory/sets/theory_sets.h"
17
18		#include "options/sets_options.h"
19		#include "theory/sets/theory_sets_private.h"
20		#include "theory/sets/theory_sets_rewriter.h"
21		#include "theory/theory_model.h"
22		#include "theory/trust_substitutions.h"
23
24		using namespace cvc5::kind;
25
26		namespace cvc5 {
27		namespace theory {
28		namespace sets {
29
30	15273	TheorySets::TheorySets(Env& env, OutputChannel& out, Valuation valuation)
31		: Theory(THEORY_SETS, env, out, valuation),
32		d_skCache(env.getRewriter()),
33		d_state(env, valuation, d_skCache),
34		d_im(env, *this, d_state),
35		d_internal(
36	15273	new TheorySetsPrivate(env, *this, d_state, d_im, d_skCache, d_pnm)),
37	30546	d_notify(*d_internal.get(), d_im)
38		{
39		// use the official theory state and inference manager objects
40	15273	d_theoryState = &d_state;
41	15273	d_inferManager = &d_im;
42	15273	}
43
44	30536	TheorySets::~TheorySets()
45		{
46	30536	}
47
48	15273	TheoryRewriter* TheorySets::getTheoryRewriter()
49		{
50	15273	return d_internal->getTheoryRewriter();
51		}
52
53	7989	ProofRuleChecker* TheorySets::getProofChecker() { return nullptr; }
54
55	15273	bool TheorySets::needsEqualityEngine(EeSetupInfo& esi)
56		{
57	15273	esi.d_notify = &d_notify;
58	15273	esi.d_name = "theory::sets::ee";
59	15273	esi.d_notifyNewClass = true;
60	15273	esi.d_notifyMerge = true;
61	15273	esi.d_notifyDisequal = true;
62	15273	return true;
63		}
64
65	15273	void TheorySets::finishInit()
66		{
67	15273	Assert(d_equalityEngine != nullptr);
68
69	15273	d_valuation.setUnevaluatedKind(COMPREHENSION);
70		// choice is used to eliminate witness
71	15273	d_valuation.setUnevaluatedKind(WITNESS);
72		// Universe set is not evaluated. This is moreover important for ensuring that
73		// we do not eliminate terms whose value involves the universe set.
74	15273	d_valuation.setUnevaluatedKind(UNIVERSE_SET);
75
76		// functions we are doing congruence over
77	15273	d_equalityEngine->addFunctionKind(SINGLETON);
78	15273	d_equalityEngine->addFunctionKind(UNION);
79	15273	d_equalityEngine->addFunctionKind(INTERSECTION);
80	15273	d_equalityEngine->addFunctionKind(SETMINUS);
81	15273	d_equalityEngine->addFunctionKind(MEMBER);
82	15273	d_equalityEngine->addFunctionKind(SUBSET);
83		// relation operators
84	15273	d_equalityEngine->addFunctionKind(PRODUCT);
85	15273	d_equalityEngine->addFunctionKind(JOIN);
86	15273	d_equalityEngine->addFunctionKind(TRANSPOSE);
87	15273	d_equalityEngine->addFunctionKind(TCLOSURE);
88	15273	d_equalityEngine->addFunctionKind(JOIN_IMAGE);
89	15273	d_equalityEngine->addFunctionKind(IDEN);
90	15273	d_equalityEngine->addFunctionKind(APPLY_CONSTRUCTOR);
91		// we do congruence over cardinality
92	15273	d_equalityEngine->addFunctionKind(CARD);
93
94		// finish initialization internally
95	15273	d_internal->finishInit();
96	15273	}
97
98	265291	void TheorySets::postCheck(Effort level) { d_internal->postCheck(level); }
99
100	711808	void TheorySets::notifyFact(TNode atom,
101		bool polarity,
102		TNode fact,
103		bool isInternal)
104		{
105	711808	d_internal->notifyFact(atom, polarity, fact);
106	711808	}
107
108	7050	bool TheorySets::collectModelValues(TheoryModel* m,
109		const std::set<Node>& termSet)
110		{
111	7050	return d_internal->collectModelValues(m, termSet);
112		}
113
114	8788	void TheorySets::computeCareGraph() {
115	8788	d_internal->computeCareGraph();
116	8788	}
117
118	6549	TrustNode TheorySets::explain(TNode node)
119		{
120	13098	Node exp = d_internal->explain(node);
121	13098	return TrustNode::mkTrustPropExp(node, exp, nullptr);
122		}
123
124		Node TheorySets::getModelValue(TNode node) {
125		return Node::null();
126		}
127
128	83086	void TheorySets::preRegisterTerm(TNode node)
129		{
130	83086	d_internal->preRegisterTerm(node);
131	83086	}
132
133	38367	TrustNode TheorySets::ppRewrite(TNode n, std::vector<SkolemLemma>& lems)
134		{
135	38367	Kind nk = n.getKind();
136	38367	if (nk == UNIVERSE_SET \|\| nk == COMPLEMENT \|\| nk == JOIN_IMAGE
137	38085	\|\| nk == COMPREHENSION)
138		{
139	327	if (!options().sets.setsExt)
140		{
141	4	std::stringstream ss;
142	2	ss << "Extended set operators are not supported in default mode, try "
143		"--sets-ext.";
144	2	throw LogicException(ss.str());
145		}
146		}
147	38365	if (nk == COMPREHENSION)
148		{
149		// set comprehension is an implicit quantifier, require it in the logic
150	45	if (!logicInfo().isQuantified())
151		{
152	2	std::stringstream ss;
153	1	ss << "Set comprehensions require quantifiers in the background logic.";
154	1	throw LogicException(ss.str());
155		}
156		}
157	38364	return d_internal->ppRewrite(n, lems);
158		}
159
160	2323	Theory::PPAssertStatus TheorySets::ppAssert(
161		TrustNode tin, TrustSubstitutionMap& outSubstitutions)
162		{
163	4646	TNode in = tin.getNode();
164	2323	Debug("sets-proc") << "ppAssert : " << in << std::endl;
165	2323	Theory::PPAssertStatus status = Theory::PP_ASSERT_STATUS_UNSOLVED;
166
167		// this is based off of Theory::ppAssert
168	2323	if (in.getKind() == EQUAL)
169		{
170	698	if (in[0].isVar() && isLegalElimination(in[0], in[1]))
171		{
172		// We cannot solve for sets if setsExt is enabled, since universe set
173		// may appear when this option is enabled, and solving for such a set
174		// impacts the semantics of universe set, see
175		// regress0/sets/pre-proc-univ.smt2
176	309	if (!in[0].getType().isSet() \|\| !options().sets.setsExt)
177		{
178	281	outSubstitutions.addSubstitutionSolved(in[0], in[1], tin);
179	281	status = Theory::PP_ASSERT_STATUS_SOLVED;
180		}
181		}
182	389	else if (in[1].isVar() && isLegalElimination(in[1], in[0]))
183		{
184		if (!in[0].getType().isSet() \|\| !options().sets.setsExt)
185		{
186		outSubstitutions.addSubstitutionSolved(in[1], in[0], tin);
187		status = Theory::PP_ASSERT_STATUS_SOLVED;
188		}
189		}
190	389	else if (in[0].isConst() && in[1].isConst())
191		{
192		if (in[0] != in[1])
193		{
194		status = Theory::PP_ASSERT_STATUS_CONFLICT;
195		}
196		}
197		}
198	4646	return status;
199		}
200
201	20560	void TheorySets::presolve() {
202	20560	d_internal->presolve();
203	20560	}
204
205		bool TheorySets::isEntailed( Node n, bool pol ) {
206		return d_internal->isEntailed( n, pol );
207		}
208
209		/************************** eq::NotifyClass ***************************/
210
211	88368	void TheorySets::NotifyClass::eqNotifyNewClass(TNode t)
212		{
213	176736	Debug("sets-eq") << "[sets-eq] eqNotifyNewClass:"
214	88368	<< " t = " << t << std::endl;
215	88368	d_theory.eqNotifyNewClass(t);
216	88368	}
217
218	741580	void TheorySets::NotifyClass::eqNotifyMerge(TNode t1, TNode t2)
219		{
220	1483160	Debug("sets-eq") << "[sets-eq] eqNotifyMerge:"
221	741580	<< " t1 = " << t1 << " t2 = " << t2 << std::endl;
222	741580	d_theory.eqNotifyMerge(t1, t2);
223	741580	}
224
225	119991	void TheorySets::NotifyClass::eqNotifyDisequal(TNode t1, TNode t2, TNode reason)
226		{
227	239982	Debug("sets-eq") << "[sets-eq] eqNotifyDisequal:"
228	119991	<< " t1 = " << t1 << " t2 = " << t2 << " reason = " << reason
229	119991	<< std::endl;
230	119991	d_theory.eqNotifyDisequal(t1, t2, reason);
231	119991	}
232
233		} // namespace sets
234		} // namespace theory
235	31137	} // namespace cvc5