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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/quantifiers/first_order_model.cpp	Lines:	161	180	89.4 %
Date:	2021-09-07	Branches:	246	534	46.1 %


/******************************************************************************
 * Top contributors (to current version):
 *   Andrew Reynolds, Aina Niemetz
 *
 * 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 model engine model class.
 */

#include "theory/quantifiers/first_order_model.h"
#include "options/base_options.h"
#include "options/quantifiers_options.h"
#include "theory/quantifiers/fmf/bounded_integers.h"
#include "theory/quantifiers/fmf/model_engine.h"
#include "theory/quantifiers/quantifiers_attributes.h"
#include "theory/quantifiers/term_database.h"
#include "theory/quantifiers/term_enumeration.h"
#include "theory/quantifiers/term_registry.h"
#include "theory/quantifiers/term_util.h"

using namespace cvc5::kind;
using namespace cvc5::context;

namespace cvc5 {
namespace theory {
namespace quantifiers {

struct ModelBasisAttributeId
{
};
using ModelBasisAttribute = expr::Attribute<ModelBasisAttributeId, bool>;
// for APPLY_UF terms, 1 : term has direct child with model basis attribute,
//                     0 : term has no direct child with model basis attribute.
struct ModelBasisArgAttributeId
{
};
using ModelBasisArgAttribute = expr::Attribute<ModelBasisArgAttributeId, uint64_t>;

FirstOrderModel::FirstOrderModel(QuantifiersState& qs,
                                 QuantifiersRegistry& qr,
                                 TermRegistry& tr)
    : d_model(nullptr),
      d_qreg(qr),
      d_treg(tr),
      d_eq_query(qs, this),
      d_forall_asserts(qs.getSatContext()),
      d_forallRlvComputed(false)
{
}

void FirstOrderModel::finishInit(TheoryModel* m) { d_model = m; }

Node FirstOrderModel::getValue(TNode n) const { return d_model->getValue(n); }
bool FirstOrderModel::hasTerm(TNode a) { return d_model->hasTerm(a); }
Node FirstOrderModel::getRepresentative(TNode a)
{
  return d_model->getRepresentative(a);
}
bool FirstOrderModel::areEqual(TNode a, TNode b)
{
  return d_model->areEqual(a, b);
}
bool FirstOrderModel::areDisequal(TNode a, TNode b)
{
  return d_model->areDisequal(a, b);
}
eq::EqualityEngine* FirstOrderModel::getEqualityEngine()
{
  return d_model->getEqualityEngine();
}
const RepSet* FirstOrderModel::getRepSet() const
{
  return d_model->getRepSet();
}
RepSet* FirstOrderModel::getRepSetPtr() { return d_model->getRepSetPtr(); }
TheoryModel* FirstOrderModel::getTheoryModel() { return d_model; }

Node FirstOrderModel::getInternalRepresentative(Node a, Node q, size_t index)
{
  return d_eq_query.getInternalRepresentative(a, q, index);
}

void FirstOrderModel::assertQuantifier( Node n ){
  if( n.getKind()==FORALL ){
    d_forall_asserts.push_back( n );
  }else if( n.getKind()==NOT ){
    Assert(n[0].getKind() == FORALL);
  }
}

size_t FirstOrderModel::getNumAssertedQuantifiers() const
{
  return d_forall_asserts.size();
}

Node FirstOrderModel::getAssertedQuantifier( unsigned i, bool ordered ) {
  if( !ordered || !d_forallRlvComputed ){
    return d_forall_asserts[i];
  }
  // If we computed the relevant forall assertion vector, in reset_round,
  // then it should have the same size as the default assertion vector.
  Assert(d_forall_rlv_assert.size() == d_forall_asserts.size());
  return d_forall_rlv_assert[i];
}

void FirstOrderModel::initialize() {
  processInitialize( true );
  //this is called after representatives have been chosen and the equality engine has been built
  //for each quantifier, collect all operators we care about
  for( unsigned i=0; i<getNumAssertedQuantifiers(); i++ ){
    Node f = getAssertedQuantifier( i );
    if( d_quant_var_id.find( f )==d_quant_var_id.end() ){
      for(unsigned j=0; j<f[0].getNumChildren(); j++){
        d_quant_var_id[f][f[0][j]] = j;
      }
    }
    processInitializeQuantifier( f );
    //initialize relevant models within bodies of all quantifiers
    std::map< Node, bool > visited;
    initializeModelForTerm( f[1], visited );
  }
  processInitialize( false );
}

void FirstOrderModel::initializeModelForTerm( Node n, std::map< Node, bool >& visited ){
  if( visited.find( n )==visited.end() ){
    visited[n] = true;
    processInitializeModelForTerm( n );
    for( int i=0; i<(int)n.getNumChildren(); i++ ){
      initializeModelForTerm( n[i], visited );
    }
  }
}

Node FirstOrderModel::getSomeDomainElement(TypeNode tn){
  //check if there is even any domain elements at all
  RepSet* rs = d_model->getRepSetPtr();
  if (!rs->hasType(tn) || rs->getNumRepresentatives(tn) == 0)
  {
    Trace("fm-debug") << "Must create domain element for " << tn << "..."
                      << std::endl;
    Node mbt = getModelBasisTerm(tn);
    Trace("fm-debug") << "Add to representative set..." << std::endl;
    rs->add(tn, mbt);
  }
  return rs->getRepresentative(tn, 0);
}

bool FirstOrderModel::initializeRepresentativesForType(TypeNode tn)
{
  RepSet* rs = d_model->getRepSetPtr();
  if (tn.isSort())
  {
    // must ensure uninterpreted type is non-empty.
    if (!rs->hasType(tn))
    {
      // terms in rep_set are now constants which mapped to terms through
      // TheoryModel. Thus, should introduce a constant and a term.
      // For now, we just add an arbitrary term.
      Node var = getSomeDomainElement(tn);
      Trace("mkVar") << "RepSetIterator:: Make variable " << var << " : " << tn
                     << std::endl;
      rs->add(tn, var);
    }
    return true;
  }
  else
  {
    // can we complete it?
    if (d_qreg.getQuantifiersBoundInference().mayComplete(tn))
    {
      Trace("fm-debug") << "  do complete, since cardinality is small ("
                        << tn.getCardinality() << ")..." << std::endl;
      rs->complete(tn);
      // must have succeeded
      Assert(rs->hasType(tn));
      return true;
    }
    Trace("fm-debug") << "  variable cannot be bounded." << std::endl;
    return false;
  }
}

bool FirstOrderModel::isModelBasis(TNode n)
{
  return n.getAttribute(ModelBasisAttribute());
}

EqualityQuery* FirstOrderModel::getEqualityQuery() { return &d_eq_query; }

/** needs check */
bool FirstOrderModel::checkNeeded() {
  return d_forall_asserts.size()>0;
}

void FirstOrderModel::reset_round() {
  d_quant_active.clear();

  // compute which quantified formulas are asserted if necessary
  std::map<Node, bool> qassert;
  if (!d_forall_rlv_vec.empty())
  {
    Trace("fm-relevant-debug")
        << "Mark asserted quantified formulas..." << std::endl;
    for (const Node& q : d_forall_asserts)
    {
      qassert[q] = true;
    }
  }
  //order the quantified formulas
  d_forall_rlv_assert.clear();
  d_forallRlvComputed = false;
  if( !d_forall_rlv_vec.empty() ){
    d_forallRlvComputed = true;
    Trace("fm-relevant") << "Build sorted relevant list..." << std::endl;
    Trace("fm-relevant-debug") << "Add relevant asserted formulas..." << std::endl;
    std::map<Node, bool>::iterator ita;
    for( int i=(int)(d_forall_rlv_vec.size()-1); i>=0; i-- ){
      Node q = d_forall_rlv_vec[i];
      ita = qassert.find(q);
      if (ita != qassert.end())
      {
        Trace("fm-relevant") << "   " << q << std::endl;
        d_forall_rlv_assert.push_back( q );
        qassert.erase(ita);
      }
    }
    Trace("fm-relevant-debug") << "Add remaining asserted formulas..." << std::endl;
    for (const Node& q : d_forall_asserts)
    {
      // if we didn't include it above
      if (qassert.find(q) != qassert.end())
      {
        d_forall_rlv_assert.push_back( q );
      }else{
        Trace("fm-relevant-debug") << "...already included " << q << std::endl;
      }
    }
    Trace("fm-relevant-debug") << "Sizes : " << d_forall_rlv_assert.size() << " " << d_forall_asserts.size() << std::endl;
    Assert(d_forall_rlv_assert.size() == d_forall_asserts.size());
  }
}

void FirstOrderModel::markRelevant( Node q ) {
  // Put q on the back of the vector d_forall_rlv_vec.
  // If we were the last quantifier marked relevant, this is a no-op, return.
  if( q!=d_last_forall_rlv ){
    Trace("fm-relevant") << "Mark relevant : " << q << std::endl;
    std::vector<Node>::iterator itr =
        std::find(d_forall_rlv_vec.begin(), d_forall_rlv_vec.end(), q);
    if (itr != d_forall_rlv_vec.end())
    {
      d_forall_rlv_vec.erase(itr, itr + 1);
    }
    d_forall_rlv_vec.push_back(q);
    d_last_forall_rlv = q;
  }
}

void FirstOrderModel::setQuantifierActive( TNode q, bool active ) {
  d_quant_active[q] = active;
}

bool FirstOrderModel::isQuantifierActive(TNode q) const
{
  std::map<TNode, bool>::const_iterator it = d_quant_active.find(q);
  if( it==d_quant_active.end() ){
    return true;
  }
  return it->second;
}

bool FirstOrderModel::isQuantifierAsserted(TNode q) const
{
  return std::find( d_forall_asserts.begin(), d_forall_asserts.end(), q )!=d_forall_asserts.end();
}

Node FirstOrderModel::getModelBasisTerm(TypeNode tn)
{
  if (d_model_basis_term.find(tn) == d_model_basis_term.end())
  {
    Node mbt;
    if (tn.isClosedEnumerable())
    {
      mbt = d_treg.getTermEnumeration()->getEnumerateTerm(tn, 0);
    }
    else
    {
      if (options::fmfFreshDistConst())
      {
        mbt = d_treg.getTermDatabase()->getOrMakeTypeFreshVariable(tn);
      }
      else
      {
        // The model basis term cannot be an interpreted function, or else we
        // may produce an inconsistent model by choosing an arbitrary
        // equivalence class for it. Hence, we require that it be an existing or
        // fresh variable.
        mbt = d_treg.getTermDatabase()->getOrMakeTypeGroundTerm(tn, true);
      }
    }
    ModelBasisAttribute mba;
    mbt.setAttribute(mba, true);
    d_model_basis_term[tn] = mbt;
    Trace("model-basis-term") << "Choose " << mbt << " as model basis term for "
                              << tn << std::endl;
  }
  return d_model_basis_term[tn];
}

bool FirstOrderModel::isModelBasisTerm(Node n)
{
  return n == getModelBasisTerm(n.getType());
}

Node FirstOrderModel::getModelBasisOpTerm(Node op)
{
  if (d_model_basis_op_term.find(op) == d_model_basis_op_term.end())
  {
    TypeNode t = op.getType();
    std::vector<Node> children;
    children.push_back(op);
    for (int i = 0; i < (int)(t.getNumChildren() - 1); i++)
    {
      children.push_back(getModelBasisTerm(t[i]));
    }
    if (children.size() == 1)
    {
      d_model_basis_op_term[op] = op;
    }
    else
    {
      d_model_basis_op_term[op] =
          NodeManager::currentNM()->mkNode(APPLY_UF, children);
    }
  }
  return d_model_basis_op_term[op];
}

Node FirstOrderModel::getModelBasis(Node q, Node n)
{
  // make model basis
  if (d_model_basis_terms.find(q) == d_model_basis_terms.end())
  {
    for (unsigned j = 0; j < q[0].getNumChildren(); j++)
    {
      d_model_basis_terms[q].push_back(getModelBasisTerm(q[0][j].getType()));
    }
  }
  Node gn = d_qreg.substituteInstConstants(n, q, d_model_basis_terms[q]);
  return gn;
}

void FirstOrderModel::computeModelBasisArgAttribute(Node n)
{
  if (!n.hasAttribute(ModelBasisArgAttribute()))
  {
    // ensure that the model basis terms have been defined
    if (n.getKind() == APPLY_UF)
    {
      getModelBasisOpTerm(n.getOperator());
    }
    uint64_t val = 0;
    // determine if it has model basis attribute
    for (unsigned j = 0, nchild = n.getNumChildren(); j < nchild; j++)
    {
      if (n[j].getAttribute(ModelBasisAttribute()))
      {
        val++;
      }
    }
    ModelBasisArgAttribute mbaa;
    n.setAttribute(mbaa, val);
  }
}

unsigned FirstOrderModel::getModelBasisArg(Node n)
{
  computeModelBasisArgAttribute(n);
  return n.getAttribute(ModelBasisArgAttribute());
}

}  // 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, Aina Niemetz
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 model engine model class.
14		*/
15
16		#include "theory/quantifiers/first_order_model.h"
17		#include "options/base_options.h"
18		#include "options/quantifiers_options.h"
19		#include "theory/quantifiers/fmf/bounded_integers.h"
20		#include "theory/quantifiers/fmf/model_engine.h"
21		#include "theory/quantifiers/quantifiers_attributes.h"
22		#include "theory/quantifiers/term_database.h"
23		#include "theory/quantifiers/term_enumeration.h"
24		#include "theory/quantifiers/term_registry.h"
25		#include "theory/quantifiers/term_util.h"
26
27		using namespace cvc5::kind;
28		using namespace cvc5::context;
29
30		namespace cvc5 {
31		namespace theory {
32		namespace quantifiers {
33
34		struct ModelBasisAttributeId
35		{
36		};
37		using ModelBasisAttribute = expr::Attribute<ModelBasisAttributeId, bool>;
38		// for APPLY_UF terms, 1 : term has direct child with model basis attribute,
39		// 0 : term has no direct child with model basis attribute.
40		struct ModelBasisArgAttributeId
41		{
42		};
43		using ModelBasisArgAttribute = expr::Attribute<ModelBasisArgAttributeId, uint64_t>;
44
45	9926	FirstOrderModel::FirstOrderModel(QuantifiersState& qs,
46		QuantifiersRegistry& qr,
47	9926	TermRegistry& tr)
48		: d_model(nullptr),
49		d_qreg(qr),
50		d_treg(tr),
51		d_eq_query(qs, this),
52		d_forall_asserts(qs.getSatContext()),
53	9926	d_forallRlvComputed(false)
54		{
55	9926	}
56
57	6835	void FirstOrderModel::finishInit(TheoryModel* m) { d_model = m; }
58
59	131965	Node FirstOrderModel::getValue(TNode n) const { return d_model->getValue(n); }
60	8578	bool FirstOrderModel::hasTerm(TNode a) { return d_model->hasTerm(a); }
61	237804	Node FirstOrderModel::getRepresentative(TNode a)
62		{
63	237804	return d_model->getRepresentative(a);
64		}
65		bool FirstOrderModel::areEqual(TNode a, TNode b)
66		{
67		return d_model->areEqual(a, b);
68		}
69		bool FirstOrderModel::areDisequal(TNode a, TNode b)
70		{
71		return d_model->areDisequal(a, b);
72		}
73		eq::EqualityEngine* FirstOrderModel::getEqualityEngine()
74		{
75		return d_model->getEqualityEngine();
76		}
77	169003	const RepSet* FirstOrderModel::getRepSet() const
78		{
79	169003	return d_model->getRepSet();
80		}
81	11247	RepSet* FirstOrderModel::getRepSetPtr() { return d_model->getRepSetPtr(); }
82		TheoryModel* FirstOrderModel::getTheoryModel() { return d_model; }
83
84	76309	Node FirstOrderModel::getInternalRepresentative(Node a, Node q, size_t index)
85		{
86	76309	return d_eq_query.getInternalRepresentative(a, q, index);
87		}
88
89	69004	void FirstOrderModel::assertQuantifier( Node n ){
90	69004	if( n.getKind()==FORALL ){
91	69004	d_forall_asserts.push_back( n );
92		}else if( n.getKind()==NOT ){
93		Assert(n[0].getKind() == FORALL);
94		}
95	69004	}
96
97	102588	size_t FirstOrderModel::getNumAssertedQuantifiers() const
98		{
99	102588	return d_forall_asserts.size();
100		}
101
102	698564	Node FirstOrderModel::getAssertedQuantifier( unsigned i, bool ordered ) {
103	698564	if( !ordered \|\| !d_forallRlvComputed ){
104	462739	return d_forall_asserts[i];
105		}
106		// If we computed the relevant forall assertion vector, in reset_round,
107		// then it should have the same size as the default assertion vector.
108	235825	Assert(d_forall_rlv_assert.size() == d_forall_asserts.size());
109	235825	return d_forall_rlv_assert[i];
110		}
111
112	2046	void FirstOrderModel::initialize() {
113	2046	processInitialize( true );
114		//this is called after representatives have been chosen and the equality engine has been built
115		//for each quantifier, collect all operators we care about
116	11211	for( unsigned i=0; i<getNumAssertedQuantifiers(); i++ ){
117	18330	Node f = getAssertedQuantifier( i );
118	9165	if( d_quant_var_id.find( f )==d_quant_var_id.end() ){
119	3705	for(unsigned j=0; j<f[0].getNumChildren(); j++){
120	2205	d_quant_var_id[f][f[0][j]] = j;
121		}
122		}
123	9165	processInitializeQuantifier( f );
124		//initialize relevant models within bodies of all quantifiers
125	18330	std::map< Node, bool > visited;
126	9165	initializeModelForTerm( f[1], visited );
127		}
128	2046	processInitialize( false );
129	2046	}
130
131	220271	void FirstOrderModel::initializeModelForTerm( Node n, std::map< Node, bool >& visited ){
132	220271	if( visited.find( n )==visited.end() ){
133	159333	visited[n] = true;
134	159333	processInitializeModelForTerm( n );
135	370439	for( int i=0; i<(int)n.getNumChildren(); i++ ){
136	211106	initializeModelForTerm( n[i], visited );
137		}
138		}
139	220271	}
140
141	3534	Node FirstOrderModel::getSomeDomainElement(TypeNode tn){
142		//check if there is even any domain elements at all
143	3534	RepSet* rs = d_model->getRepSetPtr();
144	3534	if (!rs->hasType(tn) \|\| rs->getNumRepresentatives(tn) == 0)
145		{
146	246	Trace("fm-debug") << "Must create domain element for " << tn << "..."
147	123	<< std::endl;
148	246	Node mbt = getModelBasisTerm(tn);
149	123	Trace("fm-debug") << "Add to representative set..." << std::endl;
150	123	rs->add(tn, mbt);
151		}
152	3534	return rs->getRepresentative(tn, 0);
153		}
154
155	7488	bool FirstOrderModel::initializeRepresentativesForType(TypeNode tn)
156		{
157	7488	RepSet* rs = d_model->getRepSetPtr();
158	7488	if (tn.isSort())
159		{
160		// must ensure uninterpreted type is non-empty.
161	1812	if (!rs->hasType(tn))
162		{
163		// terms in rep_set are now constants which mapped to terms through
164		// TheoryModel. Thus, should introduce a constant and a term.
165		// For now, we just add an arbitrary term.
166	14	Node var = getSomeDomainElement(tn);
167	14	Trace("mkVar") << "RepSetIterator:: Make variable " << var << " : " << tn
168	7	<< std::endl;
169	7	rs->add(tn, var);
170		}
171	1812	return true;
172		}
173		else
174		{
175		// can we complete it?
176	5676	if (d_qreg.getQuantifiersBoundInference().mayComplete(tn))
177		{
178	4260	Trace("fm-debug") << " do complete, since cardinality is small ("
179	2130	<< tn.getCardinality() << ")..." << std::endl;
180	2130	rs->complete(tn);
181		// must have succeeded
182	2130	Assert(rs->hasType(tn));
183	2130	return true;
184		}
185	3546	Trace("fm-debug") << " variable cannot be bounded." << std::endl;
186	3546	return false;
187		}
188		}
189
190		bool FirstOrderModel::isModelBasis(TNode n)
191		{
192		return n.getAttribute(ModelBasisAttribute());
193		}
194
195	9926	EqualityQuery* FirstOrderModel::getEqualityQuery() { return &d_eq_query; }
196
197		/** needs check */
198	102741	bool FirstOrderModel::checkNeeded() {
199	102741	return d_forall_asserts.size()>0;
200		}
201
202	28464	void FirstOrderModel::reset_round() {
203	28464	d_quant_active.clear();
204
205		// compute which quantified formulas are asserted if necessary
206	56928	std::map<Node, bool> qassert;
207	28464	if (!d_forall_rlv_vec.empty())
208		{
209	6342	Trace("fm-relevant-debug")
210	3171	<< "Mark asserted quantified formulas..." << std::endl;
211	150621	for (const Node& q : d_forall_asserts)
212		{
213	147450	qassert[q] = true;
214		}
215		}
216		//order the quantified formulas
217	28464	d_forall_rlv_assert.clear();
218	28464	d_forallRlvComputed = false;
219	28464	if( !d_forall_rlv_vec.empty() ){
220	3171	d_forallRlvComputed = true;
221	3171	Trace("fm-relevant") << "Build sorted relevant list..." << std::endl;
222	3171	Trace("fm-relevant-debug") << "Add relevant asserted formulas..." << std::endl;
223	3171	std::map<Node, bool>::iterator ita;
224	10981	for( int i=(int)(d_forall_rlv_vec.size()-1); i>=0; i-- ){
225	15620	Node q = d_forall_rlv_vec[i];
226	7810	ita = qassert.find(q);
227	7810	if (ita != qassert.end())
228		{
229	7476	Trace("fm-relevant") << " " << q << std::endl;
230	7476	d_forall_rlv_assert.push_back( q );
231	7476	qassert.erase(ita);
232		}
233		}
234	3171	Trace("fm-relevant-debug") << "Add remaining asserted formulas..." << std::endl;
235	150621	for (const Node& q : d_forall_asserts)
236		{
237		// if we didn't include it above
238	147450	if (qassert.find(q) != qassert.end())
239		{
240	139974	d_forall_rlv_assert.push_back( q );
241		}else{
242	7476	Trace("fm-relevant-debug") << "...already included " << q << std::endl;
243		}
244		}
245	3171	Trace("fm-relevant-debug") << "Sizes : " << d_forall_rlv_assert.size() << " " << d_forall_asserts.size() << std::endl;
246	3171	Assert(d_forall_rlv_assert.size() == d_forall_asserts.size());
247		}
248	28464	}
249
250	2285	void FirstOrderModel::markRelevant( Node q ) {
251		// Put q on the back of the vector d_forall_rlv_vec.
252		// If we were the last quantifier marked relevant, this is a no-op, return.
253	2285	if( q!=d_last_forall_rlv ){
254	1103	Trace("fm-relevant") << "Mark relevant : " << q << std::endl;
255		std::vector<Node>::iterator itr =
256	1103	std::find(d_forall_rlv_vec.begin(), d_forall_rlv_vec.end(), q);
257	1103	if (itr != d_forall_rlv_vec.end())
258		{
259	139	d_forall_rlv_vec.erase(itr, itr + 1);
260		}
261	1103	d_forall_rlv_vec.push_back(q);
262	1103	d_last_forall_rlv = q;
263		}
264	2285	}
265
266	1522	void FirstOrderModel::setQuantifierActive( TNode q, bool active ) {
267	1522	d_quant_active[q] = active;
268	1522	}
269
270	319908	bool FirstOrderModel::isQuantifierActive(TNode q) const
271		{
272	319908	std::map<TNode, bool>::const_iterator it = d_quant_active.find(q);
273	319908	if( it==d_quant_active.end() ){
274	319747	return true;
275		}
276	161	return it->second;
277		}
278
279	27543	bool FirstOrderModel::isQuantifierAsserted(TNode q) const
280		{
281	27543	return std::find( d_forall_asserts.begin(), d_forall_asserts.end(), q )!=d_forall_asserts.end();
282		}
283
284	87930	Node FirstOrderModel::getModelBasisTerm(TypeNode tn)
285		{
286	87930	if (d_model_basis_term.find(tn) == d_model_basis_term.end())
287		{
288	2160	Node mbt;
289	1080	if (tn.isClosedEnumerable())
290		{
291	562	mbt = d_treg.getTermEnumeration()->getEnumerateTerm(tn, 0);
292		}
293		else
294		{
295	518	if (options::fmfFreshDistConst())
296		{
297		mbt = d_treg.getTermDatabase()->getOrMakeTypeFreshVariable(tn);
298		}
299		else
300		{
301		// The model basis term cannot be an interpreted function, or else we
302		// may produce an inconsistent model by choosing an arbitrary
303		// equivalence class for it. Hence, we require that it be an existing or
304		// fresh variable.
305	518	mbt = d_treg.getTermDatabase()->getOrMakeTypeGroundTerm(tn, true);
306		}
307		}
308		ModelBasisAttribute mba;
309	1080	mbt.setAttribute(mba, true);
310	1080	d_model_basis_term[tn] = mbt;
311	2160	Trace("model-basis-term") << "Choose " << mbt << " as model basis term for "
312	1080	<< tn << std::endl;
313		}
314	87930	return d_model_basis_term[tn];
315		}
316
317	75030	bool FirstOrderModel::isModelBasisTerm(Node n)
318		{
319	75030	return n == getModelBasisTerm(n.getType());
320		}
321
322	11232	Node FirstOrderModel::getModelBasisOpTerm(Node op)
323		{
324	11232	if (d_model_basis_op_term.find(op) == d_model_basis_op_term.end())
325		{
326	2140	TypeNode t = op.getType();
327	2140	std::vector<Node> children;
328	1070	children.push_back(op);
329	2655	for (int i = 0; i < (int)(t.getNumChildren() - 1); i++)
330		{
331	1585	children.push_back(getModelBasisTerm(t[i]));
332		}
333	1070	if (children.size() == 1)
334		{
335		d_model_basis_op_term[op] = op;
336		}
337		else
338		{
339	1070	d_model_basis_op_term[op] =
340	2140	NodeManager::currentNM()->mkNode(APPLY_UF, children);
341		}
342		}
343	11232	return d_model_basis_op_term[op];
344		}
345
346		Node FirstOrderModel::getModelBasis(Node q, Node n)
347		{
348		// make model basis
349		if (d_model_basis_terms.find(q) == d_model_basis_terms.end())
350		{
351		for (unsigned j = 0; j < q[0].getNumChildren(); j++)
352		{
353		d_model_basis_terms[q].push_back(getModelBasisTerm(q[0][j].getType()));
354		}
355		}
356		Node gn = d_qreg.substituteInstConstants(n, q, d_model_basis_terms[q]);
357		return gn;
358		}
359
360	24405	void FirstOrderModel::computeModelBasisArgAttribute(Node n)
361		{
362	24405	if (!n.hasAttribute(ModelBasisArgAttribute()))
363		{
364		// ensure that the model basis terms have been defined
365	4011	if (n.getKind() == APPLY_UF)
366		{
367	4011	getModelBasisOpTerm(n.getOperator());
368		}
369	4011	uint64_t val = 0;
370		// determine if it has model basis attribute
371	11097	for (unsigned j = 0, nchild = n.getNumChildren(); j < nchild; j++)
372		{
373	7086	if (n[j].getAttribute(ModelBasisAttribute()))
374		{
375	908	val++;
376		}
377		}
378		ModelBasisArgAttribute mbaa;
379	4011	n.setAttribute(mbaa, val);
380		}
381	24405	}
382
383	24405	unsigned FirstOrderModel::getModelBasisArg(Node n)
384		{
385	24405	computeModelBasisArgAttribute(n);
386	24405	return n.getAttribute(ModelBasisArgAttribute());
387		}
388
389		} // namespace quantifiers
390		} // namespace theory
391	29502	} // namespace cvc5