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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/bv/bitblast/node_bitblaster.cpp	Lines:	72	76	94.7 %
Date:	2021-08-06	Branches:	118	296	39.9 %


/******************************************************************************
 * Top contributors (to current version):
 *   Mathias Preiner
 *
 * 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.
 * ****************************************************************************
 *
 * Bitblaster used to bitblast to Boolean Nodes.
 */
#include "theory/bv/bitblast/node_bitblaster.h"

#include "options/bv_options.h"
#include "theory/theory_model.h"
#include "theory/theory_state.h"

namespace cvc5 {
namespace theory {
namespace bv {

NodeBitblaster::NodeBitblaster(TheoryState* s) : TBitblaster<Node>(), d_state(s)
{
}

void NodeBitblaster::bbAtom(TNode node)
{
  node = node.getKind() == kind::NOT ? node[0] : node;

  if (hasBBAtom(node))
  {
    return;
  }

  Node normalized = Rewriter::rewrite(node);
  Node atom_bb =
      normalized.getKind() != kind::CONST_BOOLEAN
              && normalized.getKind() != kind::BITVECTOR_BITOF
          ? d_atomBBStrategies[normalized.getKind()](normalized, this)
          : normalized;

  storeBBAtom(node, Rewriter::rewrite(atom_bb));
}

void NodeBitblaster::storeBBAtom(TNode atom, Node atom_bb)
{
  d_bbAtoms.emplace(atom, atom_bb);
}

void NodeBitblaster::storeBBTerm(TNode node, const Bits& bits)
{
  d_termCache.emplace(node, bits);
}

bool NodeBitblaster::hasBBAtom(TNode lit) const
{
  if (lit.getKind() == kind::NOT)
  {
    lit = lit[0];
  }
  return d_bbAtoms.find(lit) != d_bbAtoms.end();
}

void NodeBitblaster::makeVariable(TNode var, Bits& bits)
{
  Assert(bits.size() == 0);
  for (unsigned i = 0; i < utils::getSize(var); ++i)
  {
    bits.push_back(utils::mkBitOf(var, i));
  }
  d_variables.insert(var);
}

Node NodeBitblaster::getBBAtom(TNode node) const { return node; }

void NodeBitblaster::bbTerm(TNode node, Bits& bits)
{
  Assert(node.getType().isBitVector());
  if (hasBBTerm(node))
  {
    getBBTerm(node, bits);
    return;
  }
  d_termBBStrategies[node.getKind()](node, bits, this);
  Assert(bits.size() == utils::getSize(node));
  storeBBTerm(node, bits);
}

Node NodeBitblaster::getStoredBBAtom(TNode node)
{
  bool negated = false;
  if (node.getKind() == kind::NOT)
  {
    node = node[0];
    negated = true;
  }

  Assert(hasBBAtom(node));
  Node atom_bb = d_bbAtoms.at(node);
  return negated ? atom_bb.negate() : atom_bb;
}

Node NodeBitblaster::getModelFromSatSolver(TNode a, bool fullModel)
{
  if (!hasBBTerm(a))
  {
    return utils::mkConst(utils::getSize(a), 0u);
  }

  bool assignment;
  Bits bits;
  getBBTerm(a, bits);
  Integer value(0);
  Integer one(1), zero(0);
  for (int i = bits.size() - 1; i >= 0; --i)
  {
    Integer bit;
    if (d_state->hasSatValue(bits[i], assignment))
    {
      bit = assignment ? one : zero;
    }
    else
    {
      bit = zero;
    }
    value = value * 2 + bit;
  }
  return utils::mkConst(bits.size(), value);
}

void NodeBitblaster::computeRelevantTerms(std::set<Node>& termSet)
{
  Assert(options::bitblastMode() == options::BitblastMode::EAGER);
  for (const auto& var : d_variables)
  {
    termSet.insert(var);
  }
}

bool NodeBitblaster::collectModelValues(TheoryModel* m,
                                        const std::set<Node>& relevantTerms)
{
  for (const auto& var : relevantTerms)
  {
    if (d_variables.find(var) == d_variables.end()) continue;

    Node const_value = getModelFromSatSolver(var, true);
    Assert(const_value.isNull() || const_value.isConst());
    if (!const_value.isNull())
    {
      if (!m->assertEquality(var, const_value, true))
      {
        return false;
      }
    }
  }
  return true;
}

bool NodeBitblaster::isVariable(TNode node)
{
  return d_variables.find(node) != d_variables.end();
}

}  // namespace bv
}  // namespace theory
}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Mathias Preiner
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		* Bitblaster used to bitblast to Boolean Nodes.
14		*/
15		#include "theory/bv/bitblast/node_bitblaster.h"
16
17		#include "options/bv_options.h"
18		#include "theory/theory_model.h"
19		#include "theory/theory_state.h"
20
21		namespace cvc5 {
22		namespace theory {
23		namespace bv {
24
25	11417	NodeBitblaster::NodeBitblaster(TheoryState* s) : TBitblaster<Node>(), d_state(s)
26		{
27	11417	}
28
29	2535625	void NodeBitblaster::bbAtom(TNode node)
30		{
31	2535625	node = node.getKind() == kind::NOT ? node[0] : node;
32
33	2535625	if (hasBBAtom(node))
34		{
35	2484492	return;
36		}
37
38	102266	Node normalized = Rewriter::rewrite(node);
39		Node atom_bb =
40	51133	normalized.getKind() != kind::CONST_BOOLEAN
41	51079	&& normalized.getKind() != kind::BITVECTOR_BITOF
42	102212	? d_atomBBStrategies[normalized.getKind()](normalized, this)
43	153345	: normalized;
44
45	51133	storeBBAtom(node, Rewriter::rewrite(atom_bb));
46		}
47
48	51133	void NodeBitblaster::storeBBAtom(TNode atom, Node atom_bb)
49		{
50	51133	d_bbAtoms.emplace(atom, atom_bb);
51	51133	}
52
53	91141	void NodeBitblaster::storeBBTerm(TNode node, const Bits& bits)
54		{
55	91141	d_termCache.emplace(node, bits);
56	91141	}
57
58	6921583	bool NodeBitblaster::hasBBAtom(TNode lit) const
59		{
60	6921583	if (lit.getKind() == kind::NOT)
61		{
62		lit = lit[0];
63		}
64	6921583	return d_bbAtoms.find(lit) != d_bbAtoms.end();
65		}
66
67	27809	void NodeBitblaster::makeVariable(TNode var, Bits& bits)
68		{
69	27809	Assert(bits.size() == 0);
70	333920	for (unsigned i = 0; i < utils::getSize(var); ++i)
71		{
72	306111	bits.push_back(utils::mkBitOf(var, i));
73		}
74	27809	d_variables.insert(var);
75	27809	}
76
77		Node NodeBitblaster::getBBAtom(TNode node) const { return node; }
78
79	281308	void NodeBitblaster::bbTerm(TNode node, Bits& bits)
80		{
81	281308	Assert(node.getType().isBitVector());
82	281308	if (hasBBTerm(node))
83		{
84	190850	getBBTerm(node, bits);
85	190850	return;
86		}
87	90458	d_termBBStrategies[node.getKind()](node, bits, this);
88	90458	Assert(bits.size() == utils::getSize(node));
89	90458	storeBBTerm(node, bits);
90		}
91
92	3375301	Node NodeBitblaster::getStoredBBAtom(TNode node)
93		{
94	3375301	bool negated = false;
95	3375301	if (node.getKind() == kind::NOT)
96		{
97	1154761	node = node[0];
98	1154761	negated = true;
99		}
100
101	3375301	Assert(hasBBAtom(node));
102	6750602	Node atom_bb = d_bbAtoms.at(node);
103	6750602	return negated ? atom_bb.negate() : atom_bb;
104		}
105
106	4348	Node NodeBitblaster::getModelFromSatSolver(TNode a, bool fullModel)
107		{
108	4348	if (!hasBBTerm(a))
109		{
110		return utils::mkConst(utils::getSize(a), 0u);
111		}
112
113		bool assignment;
114	8696	Bits bits;
115	4348	getBBTerm(a, bits);
116	8696	Integer value(0);
117	8696	Integer one(1), zero(0);
118	46867	for (int i = bits.size() - 1; i >= 0; --i)
119		{
120	85038	Integer bit;
121	42519	if (d_state->hasSatValue(bits[i], assignment))
122		{
123	37571	bit = assignment ? one : zero;
124		}
125		else
126		{
127	4948	bit = zero;
128		}
129	42519	value = value * 2 + bit;
130		}
131	4348	return utils::mkConst(bits.size(), value);
132		}
133
134	11	void NodeBitblaster::computeRelevantTerms(std::set<Node>& termSet)
135		{
136	11	Assert(options::bitblastMode() == options::BitblastMode::EAGER);
137	36	for (const auto& var : d_variables)
138		{
139	25	termSet.insert(var);
140		}
141	11	}
142
143	1633	bool NodeBitblaster::collectModelValues(TheoryModel* m,
144		const std::set<Node>& relevantTerms)
145		{
146	275582	for (const auto& var : relevantTerms)
147		{
148	273949	if (d_variables.find(var) == d_variables.end()) continue;
149
150	8696	Node const_value = getModelFromSatSolver(var, true);
151	4348	Assert(const_value.isNull() \|\| const_value.isConst());
152	4348	if (!const_value.isNull())
153		{
154	4348	if (!m->assertEquality(var, const_value, true))
155		{
156		return false;
157		}
158		}
159		}
160	1633	return true;
161		}
162
163	176976	bool NodeBitblaster::isVariable(TNode node)
164		{
165	176976	return d_variables.find(node) != d_variables.end();
166		}
167
168		} // namespace bv
169		} // namespace theory
170	29322	} // namespace cvc5