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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Morgan Deters, 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 inst match trie class.
*/
#include "theory/quantifiers/inst_match_trie.h"
#include "theory/quantifiers/instantiate.h"
#include "theory/quantifiers/quant_util.h"
#include "theory/quantifiers/quantifiers_state.h"
#include "theory/quantifiers/term_database.h"
#include "theory/uf/equality_engine_iterator.h"
using namespace cvc5::context;
namespace cvc5 {
namespace theory {
namespace quantifiers {
bool InstMatchTrie::existsInstMatch(quantifiers::QuantifiersState& qs,
Node q,
const std::vector<Node>& m,
bool modEq,
ImtIndexOrder* imtio,
unsigned index)
{
return !addInstMatch(qs, q, m, modEq, imtio, true, index);
}
bool InstMatchTrie::addInstMatch(quantifiers::QuantifiersState& qs,
Node f,
const std::vector<Node>& m,
bool modEq,
ImtIndexOrder* imtio,
bool onlyExist,
unsigned index)
{
if (index == f[0].getNumChildren()
|| (imtio && index == imtio->d_order.size()))
{
return false;
}
unsigned i_index = imtio ? imtio->d_order[index] : index;
Node n = m[i_index];
std::map<Node, InstMatchTrie>::iterator it = d_data.find(n);
if (it != d_data.end())
{
bool ret =
it->second.addInstMatch(qs, f, m, modEq, imtio, onlyExist, index + 1);
if (!onlyExist || !ret)
{
return ret;
}
}
if (modEq)
{
// check modulo equality if any other instantiation match exists
if (!n.isNull() && qs.hasTerm(n))
{
eq::EqClassIterator eqc(qs.getRepresentative(n), qs.getEqualityEngine());
while (!eqc.isFinished())
{
Node en = (*eqc);
if (en != n)
{
std::map<Node, InstMatchTrie>::iterator itc = d_data.find(en);
if (itc != d_data.end())
{
if (itc->second.addInstMatch(
qs, f, m, modEq, imtio, true, index + 1))
{
return false;
}
}
}
++eqc;
}
}
}
if (!onlyExist)
{
d_data[n].addInstMatch(qs, f, m, modEq, imtio, false, index + 1);
}
return true;
}
bool InstMatchTrie::removeInstMatch(Node q,
const std::vector<Node>& m,
ImtIndexOrder* imtio,
unsigned index)
{
Assert(index < q[0].getNumChildren());
Assert(!imtio || index < imtio->d_order.size());
unsigned i_index = imtio ? imtio->d_order[index] : index;
Node n = m[i_index];
std::map<Node, InstMatchTrie>::iterator it = d_data.find(n);
if (it != d_data.end())
{
if ((index + 1) == q[0].getNumChildren()
|| (imtio && (index + 1) == imtio->d_order.size()))
{
d_data.erase(n);
return true;
}
return it->second.removeInstMatch(q, m, imtio, index + 1);
}
return false;
}
void InstMatchTrie::print(std::ostream& out,
Node q,
std::vector<TNode>& terms) const
{
if (terms.size() == q[0].getNumChildren())
{
out << " ( ";
for (unsigned i = 0, size = terms.size(); i < size; i++)
{
if (i > 0)
{
out << ", ";
}
out << terms[i];
}
out << " )" << std::endl;
}
else
{
for (const std::pair<const Node, InstMatchTrie>& d : d_data)
{
terms.push_back(d.first);
d.second.print(out, q, terms);
terms.pop_back();
}
}
}
void InstMatchTrie::getInstantiations(
Node q, std::vector<std::vector<Node>>& insts) const
{
std::vector<Node> terms;
getInstantiations(q, insts, terms);
}
void InstMatchTrie::getInstantiations(Node q,
std::vector<std::vector<Node>>& insts,
std::vector<Node>& terms) const
{
if (terms.size() == q[0].getNumChildren())
{
insts.push_back(terms);
}
else
{
for (const std::pair<const Node, InstMatchTrie>& d : d_data)
{
terms.push_back(d.first);
d.second.getInstantiations(q, insts, terms);
terms.pop_back();
}
}
}
void InstMatchTrie::clear() { d_data.clear(); }
void InstMatchTrie::print(std::ostream& out, Node q) const
{
std::vector<TNode> terms;
print(out, q, terms);
}
CDInstMatchTrie::~CDInstMatchTrie()
{
for (std::pair<const Node, CDInstMatchTrie*>& d : d_data)
{
CDInstMatchTrie* current = d.second;
delete current;
}
d_data.clear();
}
bool CDInstMatchTrie::existsInstMatch(quantifiers::QuantifiersState& qs,
Node q,
const std::vector<Node>& m,
bool modEq,
unsigned index)
{
return !addInstMatch(qs, q, m, modEq, index, true);
}
bool CDInstMatchTrie::addInstMatch(quantifiers::QuantifiersState& qs,
Node f,
const std::vector<Node>& m,
bool modEq,
unsigned index,
bool onlyExist)
{
bool reset = false;
if (!d_valid.get())
{
if (onlyExist)
{
return true;
}
else
{
d_valid.set(true);
reset = true;
}
}
if (index == f[0].getNumChildren())
{
return reset;
}
Node n = m[index];
std::map<Node, CDInstMatchTrie*>::iterator it = d_data.find(n);
if (it != d_data.end())
{
bool ret = it->second->addInstMatch(qs, f, m, modEq, index + 1, onlyExist);
if (!onlyExist || !ret)
{
return reset || ret;
}
}
if (modEq)
{
// check modulo equality if any other instantiation match exists
if (!n.isNull() && qs.hasTerm(n))
{
eq::EqClassIterator eqc(qs.getRepresentative(n), qs.getEqualityEngine());
while (!eqc.isFinished())
{
Node en = (*eqc);
if (en != n)
{
std::map<Node, CDInstMatchTrie*>::iterator itc = d_data.find(en);
if (itc != d_data.end())
{
if (itc->second->addInstMatch(qs, f, m, modEq, index + 1, true))
{
return false;
}
}
}
++eqc;
}
}
}
if (!onlyExist)
{
CDInstMatchTrie* imt = new CDInstMatchTrie(qs.getUserContext());
Assert(d_data.find(n) == d_data.end());
d_data[n] = imt;
imt->addInstMatch(qs, f, m, modEq, index + 1, false);
}
return true;
}
bool CDInstMatchTrie::removeInstMatch(Node q,
const std::vector<Node>& m,
unsigned index)
{
if (index == q[0].getNumChildren())
{
if (d_valid.get())
{
d_valid.set(false);
return true;
}
return false;
}
std::map<Node, CDInstMatchTrie*>::iterator it = d_data.find(m[index]);
if (it != d_data.end())
{
return it->second->removeInstMatch(q, m, index + 1);
}
return false;
}
void CDInstMatchTrie::print(std::ostream& out,
Node q,
std::vector<TNode>& terms) const
{
if (d_valid.get())
{
if (terms.size() == q[0].getNumChildren())
{
out << " ( ";
for (unsigned i = 0; i < terms.size(); i++)
{
if (i > 0) out << " ";
out << terms[i];
}
out << " )" << std::endl;
}
else
{
for (const std::pair<const Node, CDInstMatchTrie*>& d : d_data)
{
terms.push_back(d.first);
d.second->print(out, q, terms);
terms.pop_back();
}
}
}
}
void CDInstMatchTrie::getInstantiations(
Node q, std::vector<std::vector<Node>>& insts) const
{
std::vector<Node> terms;
getInstantiations(q, insts, terms);
}
void CDInstMatchTrie::getInstantiations(Node q,
std::vector<std::vector<Node>>& insts,
std::vector<Node>& terms) const
{
if (!d_valid.get())
{
// do nothing
}
else if (terms.size() == q[0].getNumChildren())
{
insts.push_back(terms);
}
else
{
for (const std::pair<const Node, CDInstMatchTrie*>& d : d_data)
{
terms.push_back(d.first);
d.second->getInstantiations(q, insts, terms);
terms.pop_back();
}
}
}
void CDInstMatchTrie::print(std::ostream& out, Node q) const
{
std::vector<TNode> terms;
print(out, q, terms);
}
bool InstMatchTrieOrdered::addInstMatch(quantifiers::QuantifiersState& qs,
Node q,
const std::vector<Node>& m,
bool modEq)
{
return d_imt.addInstMatch(qs, q, m, modEq, d_imtio);
}
bool InstMatchTrieOrdered::existsInstMatch(quantifiers::QuantifiersState& qs,
Node q,
const std::vector<Node>& m,
bool modEq)
{
return d_imt.existsInstMatch(qs, q, m, modEq, d_imtio);
}
} // namespace quantifiers
} // namespace theory
} // namespace cvc5
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