lib/Sat/MinisatCore.cpp

/********************************************************************
 * AUTHORS: Vijay Ganesh, Dan Liew, Mate Soos
 *
 * BEGIN DATE: November, 2005
 *
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********************************************************************/

#define __STDC_FORMAT_MACROS
#include "stp/Sat/MinisatCore.h"
#include "minisat/core/Solver.h"
//#include "utils/System.h"
//#include "simp/SimpSolver.h"

namespace MiniSat
{
}
using namespace MiniSat;

namespace stp
{

uint8_t MinisatCore::value(uint32_t x) const
{
  return Minisat::toInt(s->value(x));
}

MinisatCore::MinisatCore()
{
  s = new Minisat::Solver;
}

MinisatCore::~MinisatCore()
{
  delete s;
}

void MinisatCore::setMaxConflicts(int64_t max_confl)
{
  s->setConfBudget(max_confl);
}

bool MinisatCore::addClause(
    const SATSolver::vec_literals& ps) // Add a clause to the solver.
{
  return s->addClause(ps);
}

bool MinisatCore::okay() const // FALSE means solver is in a conflicting state
{
  return s->okay();
}

// *Doesn't solve*, just does a single unit propagate.
// returns false if UNSAT.
bool MinisatCore::propagateWithAssumptions(
    const stp::SATSolver::vec_literals& assumps)
{
  if (!s->simplify())
    return false;

  setMaxConflicts(0);
  Minisat::lbool ret = s->solveLimited(assumps);
  assert(s->conflicts ==0);
  return ret != (Minisat::lbool)Minisat::l_False;
}

bool MinisatCore::solve(bool& timeout_expired) // Search without assumptions.
{
  if (!s->simplify())
    return false;

  Minisat::vec<Minisat::Lit> assumps;
  Minisat::lbool ret = s->solveLimited(assumps);
  if (ret == (Minisat::lbool)Minisat::l_Undef)
  {
    timeout_expired = true;
  }

  return ret == (Minisat::lbool)Minisat::l_True;
}

uint8_t MinisatCore::modelValue(uint32_t x) const
{
  return Minisat::toInt(s->modelValue(x));
}

uint32_t MinisatCore::newVar()
{
  return s->newVar();
}

void MinisatCore::setVerbosity(int v)
{
  s->verbosity = v;
}

unsigned long MinisatCore::nVars() const
{
  return s->nVars();
}

void MinisatCore::printStats() const
{
  //s->printStats();
}

int MinisatCore::nClauses()
{
  return s->nClauses();
}

bool MinisatCore::simplify()
{
  return s->simplify();
}
}