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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/prop/cadical.cpp	Lines:	65	85	76.5 %
Date:	2021-09-19	Branches:	39	142	27.5 %


/******************************************************************************
 * Top contributors (to current version):
 *   Mathias Preiner, Andres Noetzli, Liana Hadarean
 *
 * 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.
 * ****************************************************************************
 *
 * Wrapper for CaDiCaL SAT Solver.
 *
 * Implementation of the CaDiCaL SAT solver for cvc5 (bit-vectors).
 */

#include "prop/cadical.h"

#include "base/check.h"
#include "util/statistics_registry.h"

namespace cvc5 {
namespace prop {

using CadicalLit = int;
using CadicalVar = int;

// helper functions
namespace {

SatValue toSatValue(int result)
{
  if (result == 10) return SAT_VALUE_TRUE;
  if (result == 20) return SAT_VALUE_FALSE;
  Assert(result == 0);
  return SAT_VALUE_UNKNOWN;
}

/* Note: CaDiCaL returns lit/-lit for true/false. Older versions returned 1/-1.
 */
SatValue toSatValueLit(int value)
{
  if (value > 0) return SAT_VALUE_TRUE;
  Assert(value < 0);
  return SAT_VALUE_FALSE;
}

CadicalLit toCadicalLit(const SatLiteral lit)
{
  return lit.isNegated() ? -lit.getSatVariable() : lit.getSatVariable();
}

CadicalVar toCadicalVar(SatVariable var) { return var; }

}  // namespace helper functions

CadicalSolver::CadicalSolver(StatisticsRegistry& registry,
                             const std::string& name)
    : d_solver(new CaDiCaL::Solver()),
      // Note: CaDiCaL variables start with index 1 rather than 0 since negated
      //       literals are represented as the negation of the index.
      d_nextVarIdx(1),
      d_inSatMode(false),
      d_statistics(registry, name)
{
}

void CadicalSolver::init()
{
  d_true = newVar();
  d_false = newVar();

  d_solver->set("quiet", 1);  // CaDiCaL is verbose by default
  d_solver->add(toCadicalVar(d_true));
  d_solver->add(0);
  d_solver->add(-toCadicalVar(d_false));
  d_solver->add(0);
}

CadicalSolver::~CadicalSolver() {}

ClauseId CadicalSolver::addClause(SatClause& clause, bool removable)
{
  for (const SatLiteral& lit : clause)
  {
    d_solver->add(toCadicalLit(lit));
  }
  d_solver->add(0);
  ++d_statistics.d_numClauses;
  return ClauseIdError;
}

ClauseId CadicalSolver::addXorClause(SatClause& clause,
                                     bool rhs,
                                     bool removable)
{
  Unreachable() << "CaDiCaL does not support adding XOR clauses.";
}

SatVariable CadicalSolver::newVar(bool isTheoryAtom,
                                  bool preRegister,
                                  bool canErase)
{
  ++d_statistics.d_numVariables;
  return d_nextVarIdx++;
}

SatVariable CadicalSolver::trueVar() { return d_true; }

SatVariable CadicalSolver::falseVar() { return d_false; }

SatValue CadicalSolver::solve()
{
  TimerStat::CodeTimer codeTimer(d_statistics.d_solveTime);
  d_assumptions.clear();
  SatValue res = toSatValue(d_solver->solve());
  d_inSatMode = (res == SAT_VALUE_TRUE);
  ++d_statistics.d_numSatCalls;
  return res;
}

SatValue CadicalSolver::solve(long unsigned int&)
{
  Unimplemented() << "Setting limits for CaDiCaL not supported yet";
};

SatValue CadicalSolver::solve(const std::vector<SatLiteral>& assumptions)
{
  TimerStat::CodeTimer codeTimer(d_statistics.d_solveTime);
  d_assumptions.clear();
  for (const SatLiteral& lit : assumptions)
  {
    d_solver->assume(toCadicalLit(lit));
    d_assumptions.push_back(lit);
  }
  SatValue res = toSatValue(d_solver->solve());
  d_inSatMode = (res == SAT_VALUE_TRUE);
  ++d_statistics.d_numSatCalls;
  return res;
}

bool CadicalSolver::setPropagateOnly()
{
  d_solver->limit("decisions", 0); /* Gets reset after next solve() call. */
  return true;
}

void CadicalSolver::getUnsatAssumptions(std::vector<SatLiteral>& assumptions)
{
  for (const SatLiteral& lit : d_assumptions)
  {
    if (d_solver->failed(toCadicalLit(lit)))
    {
      assumptions.push_back(lit);
    }
  }
}

void CadicalSolver::interrupt() { d_solver->terminate(); }

SatValue CadicalSolver::value(SatLiteral l)
{
  Assert(d_inSatMode);
  return toSatValueLit(d_solver->val(toCadicalLit(l)));
}

SatValue CadicalSolver::modelValue(SatLiteral l)
{
  Assert(d_inSatMode);
  return value(l);
}

unsigned CadicalSolver::getAssertionLevel() const
{
  Unreachable() << "CaDiCaL does not support assertion levels.";
}

bool CadicalSolver::ok() const { return d_inSatMode; }

CadicalSolver::Statistics::Statistics(StatisticsRegistry& registry,
                                      const std::string& prefix)
    : d_numSatCalls(registry.registerInt(prefix + "cadical::calls_to_solve", 0)),
      d_numVariables(registry.registerInt(prefix + "cadical::variables", 0)),
      d_numClauses(registry.registerInt(prefix + "cadical::clauses", 0)),
      d_solveTime(registry.registerTimer(prefix + "cadical::solve_time"))
  {
}

}  // namespace prop
}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Mathias Preiner, Andres Noetzli, Liana Hadarean
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		* Wrapper for CaDiCaL SAT Solver.
14		*
15		* Implementation of the CaDiCaL SAT solver for cvc5 (bit-vectors).
16		*/
17
18		#include "prop/cadical.h"
19
20		#include "base/check.h"
21		#include "util/statistics_registry.h"
22
23		namespace cvc5 {
24		namespace prop {
25
26		using CadicalLit = int;
27		using CadicalVar = int;
28
29		// helper functions
30		namespace {
31
32	32992	SatValue toSatValue(int result)
33		{
34	32992	if (result == 10) return SAT_VALUE_TRUE;
35	14209	if (result == 20) return SAT_VALUE_FALSE;
36		Assert(result == 0);
37		return SAT_VALUE_UNKNOWN;
38		}
39
40		/* Note: CaDiCaL returns lit/-lit for true/false. Older versions returned 1/-1.
41		*/
42	576560	SatValue toSatValueLit(int value)
43		{
44	576560	if (value > 0) return SAT_VALUE_TRUE;
45	384943	Assert(value < 0);
46	384943	return SAT_VALUE_FALSE;
47		}
48
49	19699984	CadicalLit toCadicalLit(const SatLiteral lit)
50		{
51	19699984	return lit.isNegated() ? -lit.getSatVariable() : lit.getSatVariable();
52		}
53
54	12298	CadicalVar toCadicalVar(SatVariable var) { return var; }
55
56		} // namespace helper functions
57
58	6149	CadicalSolver::CadicalSolver(StatisticsRegistry& registry,
59	6149	const std::string& name)
60	6149	: d_solver(new CaDiCaL::Solver()),
61		// Note: CaDiCaL variables start with index 1 rather than 0 since negated
62		// literals are represented as the negation of the index.
63		d_nextVarIdx(1),
64		d_inSatMode(false),
65	12298	d_statistics(registry, name)
66		{
67	6149	}
68
69	6149	void CadicalSolver::init()
70		{
71	6149	d_true = newVar();
72	6149	d_false = newVar();
73
74	6149	d_solver->set("quiet", 1); // CaDiCaL is verbose by default
75	6149	d_solver->add(toCadicalVar(d_true));
76	6149	d_solver->add(0);
77	6149	d_solver->add(-toCadicalVar(d_false));
78	6149	d_solver->add(0);
79	6149	}
80
81	12292	CadicalSolver::~CadicalSolver() {}
82
83	5188228	ClauseId CadicalSolver::addClause(SatClause& clause, bool removable)
84		{
85	19386600	for (const SatLiteral& lit : clause)
86		{
87	14198372	d_solver->add(toCadicalLit(lit));
88		}
89	5188228	d_solver->add(0);
90	5188228	++d_statistics.d_numClauses;
91	5188228	return ClauseIdError;
92		}
93
94		ClauseId CadicalSolver::addXorClause(SatClause& clause,
95		bool rhs,
96		bool removable)
97		{
98		Unreachable() << "CaDiCaL does not support adding XOR clauses.";
99		}
100
101	1332819	SatVariable CadicalSolver::newVar(bool isTheoryAtom,
102		bool preRegister,
103		bool canErase)
104		{
105	1332819	++d_statistics.d_numVariables;
106	1332819	return d_nextVarIdx++;
107		}
108
109	43	SatVariable CadicalSolver::trueVar() { return d_true; }
110
111	157	SatVariable CadicalSolver::falseVar() { return d_false; }
112
113		SatValue CadicalSolver::solve()
114		{
115		TimerStat::CodeTimer codeTimer(d_statistics.d_solveTime);
116		d_assumptions.clear();
117		SatValue res = toSatValue(d_solver->solve());
118		d_inSatMode = (res == SAT_VALUE_TRUE);
119		++d_statistics.d_numSatCalls;
120		return res;
121		}
122
123		SatValue CadicalSolver::solve(long unsigned int&)
124		{
125		Unimplemented() << "Setting limits for CaDiCaL not supported yet";
126		};
127
128	32992	SatValue CadicalSolver::solve(const std::vector<SatLiteral>& assumptions)
129		{
130	65984	TimerStat::CodeTimer codeTimer(d_statistics.d_solveTime);
131	32992	d_assumptions.clear();
132	2582729	for (const SatLiteral& lit : assumptions)
133		{
134	2549737	d_solver->assume(toCadicalLit(lit));
135	2549737	d_assumptions.push_back(lit);
136		}
137	32992	SatValue res = toSatValue(d_solver->solve());
138	32992	d_inSatMode = (res == SAT_VALUE_TRUE);
139	32992	++d_statistics.d_numSatCalls;
140	65984	return res;
141		}
142
143		bool CadicalSolver::setPropagateOnly()
144		{
145		d_solver->limit("decisions", 0); /* Gets reset after next solve() call. */
146		return true;
147		}
148
149	14209	void CadicalSolver::getUnsatAssumptions(std::vector<SatLiteral>& assumptions)
150		{
151	2389524	for (const SatLiteral& lit : d_assumptions)
152		{
153	2375315	if (d_solver->failed(toCadicalLit(lit)))
154		{
155	109534	assumptions.push_back(lit);
156		}
157		}
158	14209	}
159
160		void CadicalSolver::interrupt() { d_solver->terminate(); }
161
162	576560	SatValue CadicalSolver::value(SatLiteral l)
163		{
164	576560	Assert(d_inSatMode);
165	576560	return toSatValueLit(d_solver->val(toCadicalLit(l)));
166		}
167
168	576554	SatValue CadicalSolver::modelValue(SatLiteral l)
169		{
170	576554	Assert(d_inSatMode);
171	576554	return value(l);
172		}
173
174		unsigned CadicalSolver::getAssertionLevel() const
175		{
176		Unreachable() << "CaDiCaL does not support assertion levels.";
177		}
178
179		bool CadicalSolver::ok() const { return d_inSatMode; }
180
181	6149	CadicalSolver::Statistics::Statistics(StatisticsRegistry& registry,
182	6149	const std::string& prefix)
183	12298	: d_numSatCalls(registry.registerInt(prefix + "cadical::calls_to_solve", 0)),
184	12298	d_numVariables(registry.registerInt(prefix + "cadical::variables", 0)),
185	12298	d_numClauses(registry.registerInt(prefix + "cadical::clauses", 0)),
186	24596	d_solveTime(registry.registerTimer(prefix + "cadical::solve_time"))
187		{
188	6149	}
189
190		} // namespace prop
191	29577	} // namespace cvc5