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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/bv/bitblast/node_bitblaster.cpp	Lines:	73	77	94.8 %
Date:	2021-09-13	Branches:	119	292	40.8 %


/******************************************************************************
 * 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(Env& env, TheoryState* s)
    : TBitblaster<Node>(), EnvObj(env), d_state(s)
{
}

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

  if (hasBBAtom(node))
  {
    return;
  }

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

  storeBBAtom(node, 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().bv.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	11475	NodeBitblaster::NodeBitblaster(Env& env, TheoryState* s)
26	11475	: TBitblaster<Node>(), EnvObj(env), d_state(s)
27		{
28	11475	}
29
30	2537132	void NodeBitblaster::bbAtom(TNode node)
31		{
32	2537132	node = node.getKind() == kind::NOT ? node[0] : node;
33
34	2537132	if (hasBBAtom(node))
35		{
36	2486021	return;
37		}
38
39	102222	Node normalized = rewrite(node);
40		Node atom_bb =
41	51111	normalized.getKind() != kind::CONST_BOOLEAN
42	51057	&& normalized.getKind() != kind::BITVECTOR_BITOF
43	102168	? d_atomBBStrategies[normalized.getKind()](normalized, this)
44	153279	: normalized;
45
46	51111	storeBBAtom(node, rewrite(atom_bb));
47		}
48
49	51111	void NodeBitblaster::storeBBAtom(TNode atom, Node atom_bb)
50		{
51	51111	d_bbAtoms.emplace(atom, atom_bb);
52	51111	}
53
54	91041	void NodeBitblaster::storeBBTerm(TNode node, const Bits& bits)
55		{
56	91041	d_termCache.emplace(node, bits);
57	91041	}
58
59	7011150	bool NodeBitblaster::hasBBAtom(TNode lit) const
60		{
61	7011150	if (lit.getKind() == kind::NOT)
62		{
63		lit = lit[0];
64		}
65	7011150	return d_bbAtoms.find(lit) != d_bbAtoms.end();
66		}
67
68	27756	void NodeBitblaster::makeVariable(TNode var, Bits& bits)
69		{
70	27756	Assert(bits.size() == 0);
71	332766	for (unsigned i = 0; i < utils::getSize(var); ++i)
72		{
73	305010	bits.push_back(utils::mkBitOf(var, i));
74		}
75	27756	d_variables.insert(var);
76	27756	}
77
78		Node NodeBitblaster::getBBAtom(TNode node) const { return node; }
79
80	280941	void NodeBitblaster::bbTerm(TNode node, Bits& bits)
81		{
82	280941	Assert(node.getType().isBitVector());
83	280941	if (hasBBTerm(node))
84		{
85	190583	getBBTerm(node, bits);
86	190583	return;
87		}
88	90358	d_termBBStrategies[node.getKind()](node, bits, this);
89	90358	Assert(bits.size() == utils::getSize(node));
90	90358	storeBBTerm(node, bits);
91		}
92
93	3420114	Node NodeBitblaster::getStoredBBAtom(TNode node)
94		{
95	3420114	bool negated = false;
96	3420114	if (node.getKind() == kind::NOT)
97		{
98	1155372	node = node[0];
99	1155372	negated = true;
100		}
101
102	3420114	Assert(hasBBAtom(node));
103	6840228	Node atom_bb = d_bbAtoms.at(node);
104	6840228	return negated ? atom_bb.negate() : atom_bb;
105		}
106
107	4348	Node NodeBitblaster::getModelFromSatSolver(TNode a, bool fullModel)
108		{
109	4348	if (!hasBBTerm(a))
110		{
111		return utils::mkConst(utils::getSize(a), 0u);
112		}
113
114		bool assignment;
115	8696	Bits bits;
116	4348	getBBTerm(a, bits);
117	8696	Integer value(0);
118	8696	Integer one(1), zero(0);
119	46867	for (int i = bits.size() - 1; i >= 0; --i)
120		{
121	85038	Integer bit;
122	42519	if (d_state->hasSatValue(bits[i], assignment))
123		{
124	37571	bit = assignment ? one : zero;
125		}
126		else
127		{
128	4948	bit = zero;
129		}
130	42519	value = value * 2 + bit;
131		}
132	4348	return utils::mkConst(bits.size(), value);
133		}
134
135	11	void NodeBitblaster::computeRelevantTerms(std::set<Node>& termSet)
136		{
137	11	Assert(options().bv.bitblastMode == options::BitblastMode::EAGER);
138	36	for (const auto& var : d_variables)
139		{
140	25	termSet.insert(var);
141		}
142	11	}
143
144	1620	bool NodeBitblaster::collectModelValues(TheoryModel* m,
145		const std::set<Node>& relevantTerms)
146		{
147	275569	for (const auto& var : relevantTerms)
148		{
149	273949	if (d_variables.find(var) == d_variables.end()) continue;
150
151	8696	Node const_value = getModelFromSatSolver(var, true);
152	4348	Assert(const_value.isNull() \|\| const_value.isConst());
153	4348	if (!const_value.isNull())
154		{
155	4348	if (!m->assertEquality(var, const_value, true))
156		{
157		return false;
158		}
159		}
160		}
161	1620	return true;
162		}
163
164	186570	bool NodeBitblaster::isVariable(TNode node)
165		{
166	186570	return d_variables.find(node) != d_variables.end();
167		}
168
169		} // namespace bv
170		} // namespace theory
171	29514	} // namespace cvc5