ManyCore (SAT4J core 2.3.3 API)

java.lang.Object
- org.sat4j.tools.ManyCore<S>

Type Parameters:
S - the type of the solver (ISolver of IPBSolver)

All Implemented Interfaces:

Serializable, IProblem, ISolver, RandomAccessModel, OutcomeListener
```
public class ManyCore<S extends ISolver>
extends Object
implements ISolver, OutcomeListener
```
A class allowing to run several solvers in parallel. Note that each solver will have its own copy of the CNF, so it is not a memory efficient implementation. There is no sharing of information yet between the solvers.

Author:

leberre

See Also:
Serialized Form

Field Summary

Fields
Modifier and Type Field and Description

protected int numberOfSolvers

protected List<S> solvers

Fields
Modifier and Type	Field and Description
`protected int`	`numberOfSolvers`
`protected List<S>`	`solvers`

Constructor Summary

Constructors
Constructor and Description
`ManyCore(ASolverFactory<S> factory, String... solverNames)`
`ManyCore(S... solverObjects)`
`ManyCore(String[] names, S... solverObjects)` Create a parallel solver from a list of solvers and a list of names.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addAllClauses(IVec<IVecInt> clauses)` Create clauses from a set of set of literals.
`IConstr`	`addAtLeast(IVecInt literals, int degree)` Create a cardinality constraint of the type "at least n of those literals must be satisfied"
`IConstr`	`addAtMost(IVecInt literals, int degree)` Create a cardinality constraint of the type "at most n of those literals must be satisfied"
`IConstr`	`addBlockingClause(IVecInt literals)` Add a clause in order to prevent an assignment to occur.
`IConstr`	`addClause(IVecInt literals)` Create a clause from a set of literals The literals are represented by non null integers such that opposite literals a represented by opposite values.
`IConstr`	`addExactly(IVecInt literals, int n)` Create a cardinality constraint of the type "exactly n of those literals must be satisfied".
`void`	`clearLearntClauses()` Remove clauses learned during the solving process.
`void`	`expireTimeout()` Expire the timeout of the solver.
`int[]`	`findModel()` Look for a model satisfying all the clauses available in the problem.
`int[]`	`findModel(IVecInt assumps)` Look for a model satisfying all the clauses available in the problem.
`String`	`getLogPrefix()`
`<I extends ISolverService> SearchListener<I>`	`getSearchListener()` Get the current SearchListener.
`List<S>`	`getSolvers()`
`ISolver`	`getSolvingEngine()` Retrieve the real engine in case the engine is decorated by one or several decorator.
`Map<String,Number>`	`getStat()` To obtain a map of the available statistics from the solver.
`int`	`getTimeout()` Useful to check the internal timeout of the solver.
`long`	`getTimeoutMs()` Useful to check the internal timeout of the solver.
`boolean`	`isDBSimplificationAllowed()` Indicate whether the solver is allowed to simplify the formula by propagating the truth value of top level satisfied variables.
`boolean`	`isSatisfiable()` Check the satisfiability of the set of constraints contained inside the solver.
`boolean`	`isSatisfiable(boolean globalTimeout)` Check the satisfiability of the set of constraints contained inside the solver.
`boolean`	`isSatisfiable(IVecInt assumps)` Check the satisfiability of the set of constraints contained inside the solver.
`boolean`	`isSatisfiable(IVecInt assumps, boolean globalTimeout)` Check the satisfiability of the set of constraints contained inside the solver.
`boolean`	`isSolverKeptHot()` Ask to the solver if it is in "hot" mode, meaning that the heuristics is not reset after call is isSatisfiable().
`boolean`	`isVerbose()` To know if the solver is in verbose mode (output allowed) or not.
`int[]`	`model()` Provide a model (if any) for a satisfiable formula.
`boolean`	`model(int var)` Provide the truth value of a specific variable in the model.
`int[]`	`modelWithInternalVariables()` That method is designed to be used to retrieve the real model of the current set of constraints, i.e. to provide the truth value of boolean variables used internally in the solver (for encoding purposes for instance).
`int`	`nConstraints()` To know the number of constraints currently available in the solver.
`int`	`newVar()` Create a new variable in the solver (and thus in the vocabulary).
`int`	`newVar(int howmany)` Declare `howmany` variables in the problem (and thus in the vocabulary), that will be represented using the Dimacs format by integers ranging from 1 to howmany.
`int`	`nextFreeVarId(boolean reserve)` Ask the solver for a free variable identifier, in Dimacs format (i.e. a positive number).
`int`	`nVars()` To know the number of variables used in the solver as declared by newVar() In case the method newVar() has not been used, the method returns the number of variables used in the solver.
`void`	`onFinishWithAnswer(boolean finished, boolean result, int index)`
`int[]`	`primeImplicant()` Provide a prime implicant, i.e. a set of literal that is sufficient to satisfy all constraints of the problem.
`boolean`	`primeImplicant(int p)` Check if a given literal is part of the prime implicant computed by the `IProblem.primeImplicant()` method.
`void`	`printInfos(PrintWriter out)` To print additional informations regarding the problem.
`void`	`printInfos(PrintWriter out, String prefix)` To print additional informations regarding the problem.
`void`	`printStat(PrintStream out, String prefix)` Deprecated.
`void`	`printStat(PrintWriter out)` Display statistics to the given output writer
`void`	`printStat(PrintWriter out, String prefix)` Display statistics to the given output writer
`int`	`realNumberOfVariables()` Retrieve the real number of variables used in the solver.
`void`	`registerLiteral(int p)` Tell the solver to consider that the literal is in the CNF.
`boolean`	`removeConstr(IConstr c)` Remove a constraint returned by one of the add method from the solver.
`boolean`	`removeSubsumedConstr(IConstr c)` Remove a constraint returned by one of the add method from the solver that is subsumed by a constraint already in the solver or to be added to the solver.
`void`	`reset()` Clean up the internal state of the solver.
`void`	`setDBSimplificationAllowed(boolean status)` Set whether the solver is allowed to simplify the formula by propagating the truth value of top level satisfied variables.
`void`	`setExpectedNumberOfClauses(int nb)` To inform the solver of the expected number of clauses to read.
`void`	`setKeepSolverHot(boolean value)` Changed the behavior of the SAT solver heuristics between successive calls.
`void`	`setLogPrefix(String prefix)` Set the prefix used to display information.
`<I extends ISolverService> void`	`setSearchListener(SearchListener<I> sl)` Allow the user to hook a listener to the solver to be notified of the main steps of the search process.
`void`	`setTimeout(int t)` To set the internal timeout of the solver.
`void`	`setTimeoutMs(long t)` To set the internal timeout of the solver.
`void`	`setTimeoutOnConflicts(int count)` To set the internal timeout of the solver.
`void`	`setVerbose(boolean value)` Set the verbosity of the solver
`String`	`toString(String prefix)` Display a textual representation of the solver configuration.
`IVecInt`	`unsatExplanation()` Retrieve an explanation of the inconsistency in terms of assumption literals.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - solvers
```
protected final List<S extends ISolver> solvers
```
  - numberOfSolvers
```
protected final int numberOfSolvers
```
- Constructor Detail
  - ManyCore
```
public ManyCore(ASolverFactory<S> factory,
        String... solverNames)
```
  - ManyCore
```
public ManyCore(String[] names,
        S... solverObjects)
```
    Create a parallel solver from a list of solvers and a list of names.
    
    Parameters:
    names - a String to describe each solver in the messages.
    solverObjects - the solvers
  - ManyCore
```
public ManyCore(S... solverObjects)
```
- Method Detail
  - addAllClauses
```
public void addAllClauses(IVec<IVecInt> clauses)
                   throws ContradictionException
```
    Description copied from interface: ISolver
    
    Create clauses from a set of set of literals. This is convenient to create in a single call all the clauses (mandatory for the distributed version of the solver). It is mainly a loop to addClause().
    
    Specified by:
    
    addAllClauses in interface ISolver
    
    Parameters:
    clauses - a vector of set (VecInt) of literals in the dimacs format. The vector can be reused since the solver is not supposed to keep a reference to that vector.
    
    Throws:
    
    ContradictionException - iff the vector of literals is empty or if it contains only falsified literals after unit propagation
    See Also:
    ISolver.addClause(IVecInt)
  - addAtLeast
```
public IConstr addAtLeast(IVecInt literals,
                 int degree)
                   throws ContradictionException
```
    Description copied from interface: ISolver
    
    Create a cardinality constraint of the type "at least n of those literals must be satisfied"
    
    Specified by:
    
    addAtLeast in interface ISolver
    
    Parameters:
    literals - a set of literals. The vector can be reused since the solver is not supposed to keep a reference to that vector.
    degree - the degree (n) of the cardinality constraint
    
    Returns:
    a reference to the constraint added in the solver, to use in removeConstr().
    
    Throws:
    
    ContradictionException - iff the vector of literals is empty or if degree literals are not remaining unfalsified after unit propagation
    See Also:
    ISolver.removeConstr(IConstr)
  - addAtMost
```
public IConstr addAtMost(IVecInt literals,
                int degree)
                  throws ContradictionException
```
    Description copied from interface: ISolver
    
    Create a cardinality constraint of the type "at most n of those literals must be satisfied"
    
    Specified by:
    
    addAtMost in interface ISolver
    
    Parameters:
    literals - a set of literals The vector can be reused since the solver is not supposed to keep a reference to that vector.
    degree - the degree (n) of the cardinality constraint
    
    Returns:
    a reference to the constraint added in the solver, to use in removeConstr().
    
    Throws:
    
    ContradictionException - iff the vector of literals is empty or if it contains more than degree satisfied literals after unit propagation
    See Also:
    ISolver.removeConstr(IConstr)
  - addExactly
```
public IConstr addExactly(IVecInt literals,
                 int n)
                   throws ContradictionException
```
    Description copied from interface: ISolver
    
    Create a cardinality constraint of the type "exactly n of those literals must be satisfied".
    
    Specified by:
    
    addExactly in interface ISolver
    
    Parameters:
    literals - a set of literals. The vector can be reused since the solver is not supposed to keep a reference to that vector.
    n - the number of literals that must be satisfied
    
    Returns:
    a reference to the constraint added to the solver. It might return an object representing a group of constraints.
    
    Throws:
    
    ContradictionException - iff the constraint is trivially unsatisfiable.
  - addClause
```
public IConstr addClause(IVecInt literals)
                  throws ContradictionException
```
    Description copied from interface: ISolver
    
    Create a clause from a set of literals The literals are represented by non null integers such that opposite literals a represented by opposite values. (classical Dimacs way of representing literals).
    
    Specified by:
    
    addClause in interface ISolver
    
    Parameters:
    literals - a set of literals
    
    Returns:
    a reference to the constraint added in the solver, to use in removeConstr().
    
    Throws:
    
    ContradictionException - iff the vector of literals is empty or if it contains only falsified literals after unit propagation
    See Also:
    ISolver.removeConstr(IConstr)
  - clearLearntClauses
```
public void clearLearntClauses()
```
    Description copied from interface: ISolver
    
    Remove clauses learned during the solving process.
    
    Specified by:
    
    clearLearntClauses in interface ISolver
  - expireTimeout
```
public void expireTimeout()
```
    Description copied from interface: ISolver
    
    Expire the timeout of the solver.
    
    Specified by:
    
    expireTimeout in interface ISolver
  - getStat
```
public Map<String,Number> getStat()
```
    Description copied from interface: ISolver
    
    To obtain a map of the available statistics from the solver. Note that some keys might be specific to some solvers.
    
    Specified by:
    
    getStat in interface ISolver
    
    Returns:
    a Map with the name of the statistics as key.
  - getTimeout
```
public int getTimeout()
```
    Description copied from interface: ISolver
    
    Useful to check the internal timeout of the solver.
    
    Specified by:
    
    getTimeout in interface ISolver
    
    Returns:
    the internal timeout of the solver (in seconds)
  - getTimeoutMs
```
public long getTimeoutMs()
```
    Description copied from interface: ISolver
    
    Useful to check the internal timeout of the solver.
    
    Specified by:
    
    getTimeoutMs in interface ISolver
    
    Returns:
    the internal timeout of the solver (in milliseconds)
  - newVar
```
public int newVar()
```
    Description copied from interface: ISolver
    
    Create a new variable in the solver (and thus in the vocabulary). WE STRONGLY ENCOURAGE TO PRECOMPUTE THE NUMBER OF VARIABLES NEEDED AND TO USE newVar(howmany) INSTEAD. IF YOU EXPERIENCE A PROBLEM OF EFFICIENCY WHEN READING/BUILDING YOUR SAT INSTANCE, PLEASE CHECK THAT YOU ARE NOT USING THAT METHOD.
    
    Specified by:
    
    newVar in interface ISolver
    
    Returns:
    the number of variables available in the vocabulary, which is the identifier of the new variable.
  - newVar
```
public int newVar(int howmany)
```
    Description copied from interface: IProblem
    
    Declare howmany variables in the problem (and thus in the vocabulary), that will be represented using the Dimacs format by integers ranging from 1 to howmany. That feature allows encodings to create additional variables with identifier starting at howmany+1.
    
    Specified by:
    
    newVar in interface IProblem
    
    Parameters:
    howmany - number of variables to create
    
    Returns:
    the total number of variables available in the solver (the highest variable number)
    See Also:
    IProblem.nVars()
  - printStat
```
@Deprecated
public void printStat(PrintStream out,
                        String prefix)
```
    Deprecated.
    
    Description copied from interface: ISolver
    
    Display statistics to the given output stream Please use writers instead of stream.
    
    Specified by:
    
    printStat in interface ISolver
    
    prefix - the prefix to put in front of each line
    See Also:
    ISolver.printStat(PrintWriter, String)
  - printStat
```
public void printStat(PrintWriter out,
             String prefix)
```
    Description copied from interface: ISolver
    
    Display statistics to the given output writer
    
    Specified by:
    
    printStat in interface ISolver
    
    prefix - the prefix to put in front of each line
  - removeConstr
```
public boolean removeConstr(IConstr c)
```
    Description copied from interface: ISolver
    
    Remove a constraint returned by one of the add method from the solver. All learned clauses will be cleared. Current implementation does not handle properly the case of unit clauses.
    
    Specified by:
    
    removeConstr in interface ISolver
    
    Parameters:
    c - a constraint returned by one of the add method.
    
    Returns:
    true if the constraint was successfully removed.
  - reset
```
public void reset()
```
    Description copied from interface: ISolver
    
    Clean up the internal state of the solver. Note that such method should also be called when you no longer need the solver because the state of the solver may prevent the GC to proceed. There is a known issue for instance where failing to call reset() on a solver will keep timer threads alive and exhausts memory.
    
    Specified by:
    
    reset in interface ISolver
  - setExpectedNumberOfClauses
```
public void setExpectedNumberOfClauses(int nb)
```
    Description copied from interface: ISolver
    
    To inform the solver of the expected number of clauses to read. This is an optional method, that is called when the p cnf line is read in dimacs formatted input file. Note that this method is supposed to be called AFTER a call to newVar(int)
    
    Specified by:
    
    setExpectedNumberOfClauses in interface ISolver
    
    Parameters:
    nb - the expected number of clauses.
    See Also:
    IProblem.newVar(int)
  - setTimeout
```
public void setTimeout(int t)
```
    Description copied from interface: ISolver
    
    To set the internal timeout of the solver. When the timeout is reached, a timeout exception is launched by the solver.
    
    Specified by:
    
    setTimeout in interface ISolver
    
    Parameters:
    t - the timeout (in s)
  - setTimeoutMs
```
public void setTimeoutMs(long t)
```
    Description copied from interface: ISolver
    
    To set the internal timeout of the solver. When the timeout is reached, a timeout exception is launched by the solver.
    
    Specified by:
    
    setTimeoutMs in interface ISolver
    
    Parameters:
    t - the timeout (in milliseconds)
  - setTimeoutOnConflicts
```
public void setTimeoutOnConflicts(int count)
```
    Description copied from interface: ISolver
    
    To set the internal timeout of the solver. When the timeout is reached, a timeout exception is launched by the solver. Here the timeout is given in number of conflicts. That way, the behavior of the solver should be the same across different architecture.
    
    Specified by:
    
    setTimeoutOnConflicts in interface ISolver
    
    Parameters:
    count - the timeout (in number of conflicts)
  - toString
```
public String toString(String prefix)
```
    Description copied from interface: ISolver
    
    Display a textual representation of the solver configuration.
    
    Specified by:
    
    toString in interface ISolver
    
    Parameters:
    prefix - the prefix to use on each line.
    
    Returns:
    a textual description of the solver internals.
  - findModel
```
public int[] findModel()
                throws TimeoutException
```
    Description copied from interface: IProblem
    
    Look for a model satisfying all the clauses available in the problem. It is an alternative to isSatisfiable() and model() methods, as shown in the pseudo-code: if (isSatisfiable()) { return model(); } return null;
    
    Specified by:
    
    findModel in interface IProblem
    
    Returns:
    a model of the formula as an array of literals to satisfy, or null if no model is found
    
    Throws:
    
    TimeoutException - if a model cannot be found within the given timeout.
  - findModel
```
public int[] findModel(IVecInt assumps)
                throws TimeoutException
```
    Description copied from interface: IProblem
    
    Look for a model satisfying all the clauses available in the problem. It is an alternative to isSatisfiable(IVecInt) and model() methods, as shown in the pseudo-code: if (isSatisfiable(assumpt)) { return model(); } return null;
    
    Specified by:
    
    findModel in interface IProblem
    
    Returns:
    a model of the formula as an array of literals to satisfy, or null if no model is found
    
    Throws:
    
    TimeoutException - if a model cannot be found within the given timeout.
  - isSatisfiable
```
public boolean isSatisfiable()
                      throws TimeoutException
```
    Description copied from interface: IProblem
    
    Check the satisfiability of the set of constraints contained inside the solver.
    
    Specified by:
    
    isSatisfiable in interface IProblem
    
    Returns:
    true if the set of constraints is satisfiable, else false.
    
    Throws:
    
    TimeoutException
  - isSatisfiable
```
public boolean isSatisfiable(IVecInt assumps,
                    boolean globalTimeout)
                      throws TimeoutException
```
    Description copied from interface: IProblem
    
    Check the satisfiability of the set of constraints contained inside the solver.
    
    Specified by:
    
    isSatisfiable in interface IProblem
    
    Parameters:
    assumps - a set of literals (represented by usual non null integers in Dimacs format).
    globalTimeout - whether that call is part of a global process (i.e. optimization) or not. if (global), the timeout will not be reset between each call.
    
    Returns:
    true if the set of constraints is satisfiable when literals are satisfied, else false.
    
    Throws:
    
    TimeoutException
  - isSatisfiable
```
public boolean isSatisfiable(boolean globalTimeout)
                      throws TimeoutException
```
    Description copied from interface: IProblem
    
    Check the satisfiability of the set of constraints contained inside the solver.
    
    Specified by:
    
    isSatisfiable in interface IProblem
    
    Parameters:
    globalTimeout - whether that call is part of a global process (i.e. optimization) or not. if (global), the timeout will not be reset between each call.
    
    Returns:
    true if the set of constraints is satisfiable, else false.
    
    Throws:
    
    TimeoutException
  - isSatisfiable
```
public boolean isSatisfiable(IVecInt assumps)
                      throws TimeoutException
```
    Description copied from interface: IProblem
    
    Check the satisfiability of the set of constraints contained inside the solver.
    
    Specified by:
    
    isSatisfiable in interface IProblem
    
    Parameters:
    assumps - a set of literals (represented by usual non null integers in Dimacs format).
    
    Returns:
    true if the set of constraints is satisfiable when literals are satisfied, else false.
    
    Throws:
    
    TimeoutException
  - model
```
public int[] model()
```
    Description copied from interface: IProblem
    
    Provide a model (if any) for a satisfiable formula. That method should be called AFTER isSatisfiable() or isSatisfiable(IVecInt) if the formula is satisfiable. Else an exception UnsupportedOperationException is launched.
    
    Specified by:
    
    model in interface IProblem
    
    Returns:
    a model of the formula as an array of literals to satisfy.
    See Also:
    IProblem.isSatisfiable(), IProblem.isSatisfiable(IVecInt)
  - model
```
public boolean model(int var)
```
    Description copied from interface: RandomAccessModel
    
    Provide the truth value of a specific variable in the model. That method should be called AFTER isSatisfiable() if the formula is satisfiable. Else an exception UnsupportedOperationException is launched.
    
    Specified by:
    
    model in interface RandomAccessModel
    
    Parameters:
    var - the variable id in Dimacs format
    
    Returns:
    the truth value of that variable in the model
    See Also:
    #model()
  - nConstraints
```
public int nConstraints()
```
    Description copied from interface: IProblem
    
    To know the number of constraints currently available in the solver. (without taking into account learned constraints).
    
    Specified by:
    
    nConstraints in interface IProblem
    
    Returns:
    the number of constraints added to the solver
  - nVars
```
public int nVars()
```
    Description copied from interface: IProblem
    
    To know the number of variables used in the solver as declared by newVar() In case the method newVar() has not been used, the method returns the number of variables used in the solver.
    
    Specified by:
    
    nVars in interface IProblem
    
    Returns:
    the number of variables created using newVar().
    See Also:
    IProblem.newVar(int)
  - printInfos
```
public void printInfos(PrintWriter out,
              String prefix)
```
    Description copied from interface: IProblem
    
    To print additional informations regarding the problem.
    
    Specified by:
    
    printInfos in interface IProblem
    
    Parameters:
    out - the place to print the information
    prefix - the prefix to put in front of each line
  - onFinishWithAnswer
```
public void onFinishWithAnswer(boolean finished,
                      boolean result,
                      int index)
```
    Specified by:
    
    onFinishWithAnswer in interface OutcomeListener
  - isDBSimplificationAllowed
```
public boolean isDBSimplificationAllowed()
```
    Description copied from interface: ISolver
    
    Indicate whether the solver is allowed to simplify the formula by propagating the truth value of top level satisfied variables. Note that the solver should not be allowed to perform such simplification when constraint removal is planned.
    
    Specified by:
    
    isDBSimplificationAllowed in interface ISolver
  - setDBSimplificationAllowed
```
public void setDBSimplificationAllowed(boolean status)
```
    Description copied from interface: ISolver
    
    Set whether the solver is allowed to simplify the formula by propagating the truth value of top level satisfied variables. Note that the solver should not be allowed to perform such simplification when constraint removal is planned.
    
    Specified by:
    
    setDBSimplificationAllowed in interface ISolver
  - setSearchListener
```
public <I extends ISolverService> void setSearchListener(SearchListener<I> sl)
```
    Description copied from interface: ISolver
    
    Allow the user to hook a listener to the solver to be notified of the main steps of the search process.
    
    Specified by:
    
    setSearchListener in interface ISolver
    
    Parameters:
    sl - a Search Listener.
  - getSearchListener
```
public <I extends ISolverService> SearchListener<I> getSearchListener()
```
    Description copied from interface: ISolver
    
    Get the current SearchListener.
    
    Specified by:
    
    getSearchListener in interface ISolver
    
    Returns:
    a Search Listener.
    Since:
    
    2.2
  - nextFreeVarId
```
public int nextFreeVarId(boolean reserve)
```
    Description copied from interface: ISolver
    
    Ask the solver for a free variable identifier, in Dimacs format (i.e. a positive number). Note that a previous call to newVar(max) will reserve in the solver the variable identifier from 1 to max, so nextFreeVarId() would return max+1, even if some variable identifiers smaller than max are not used. By default, the method will always answer by the maximum variable identifier used so far + 1. The number of variables reserved in the solver is accessible through the ISolver.realNumberOfVariables() method.
    
    Specified by:
    
    nextFreeVarId in interface ISolver
    
    Parameters:
    reserve - if true, the maxVarId is updated in the solver, i.e. successive calls to nextFreeVarId(true) will return increasing variable id while successive calls to nextFreeVarId(false) will always answer the same.
    
    Returns:
    a variable identifier not in use in the constraints already inside the solver.
    See Also:
    ISolver.realNumberOfVariables()
  - addBlockingClause
```
public IConstr addBlockingClause(IVecInt literals)
                          throws ContradictionException
```
    Description copied from interface: ISolver
    
    Add a clause in order to prevent an assignment to occur. This happens usually when iterating over models for instance.
    
    Specified by:
    
    addBlockingClause in interface ISolver
    
    Returns:
    
    Throws:
    
    ContradictionException
  - removeSubsumedConstr
```
public boolean removeSubsumedConstr(IConstr c)
```
    Description copied from interface: ISolver
    
    Remove a constraint returned by one of the add method from the solver that is subsumed by a constraint already in the solver or to be added to the solver. Unlike the removeConstr() method, learned clauses will NOT be cleared. That method is expected to be used to remove constraints used in the optimization process. In order to prevent a wrong from the user, the method will only work if the argument is the last constraint added to the solver. An illegal argument exception will be thrown in other cases.
    
    Specified by:
    
    removeSubsumedConstr in interface ISolver
    
    Parameters:
    c - a constraint returned by one of the add method. It must be the latest constr added to the solver.
    
    Returns:
    true if the constraint was successfully removed.
  - isVerbose
```
public boolean isVerbose()
```
    Description copied from interface: ISolver
    
    To know if the solver is in verbose mode (output allowed) or not.
    
    Specified by:
    
    isVerbose in interface ISolver
    
    Returns:
    true if the solver is verbose.
  - setVerbose
```
public void setVerbose(boolean value)
```
    Description copied from interface: ISolver
    
    Set the verbosity of the solver
    
    Specified by:
    
    setVerbose in interface ISolver
    
    Parameters:
    value - true to allow the solver to output messages on the console, false either.
  - setLogPrefix
```
public void setLogPrefix(String prefix)
```
    Description copied from interface: ISolver
    
    Set the prefix used to display information.
    
    Specified by:
    
    setLogPrefix in interface ISolver
    
    Parameters:
    prefix - the prefix to be in front of each line of text
  - getLogPrefix
```
public String getLogPrefix()
```
    Specified by:
    
    getLogPrefix in interface ISolver
    
    Returns:
    the string used to prefix the output.
  - unsatExplanation
```
public IVecInt unsatExplanation()
```
    Description copied from interface: ISolver
    
    Retrieve an explanation of the inconsistency in terms of assumption literals. This is only application when isSatisfiable(assumps) is used. Note that !isSatisfiable(assumps)&&assumps.contains(unsatExplanation()) should hold.
    
    Specified by:
    
    unsatExplanation in interface ISolver
    
    Returns:
    a subset of the assumptions used when calling isSatisfiable(assumps). Will return null if not applicable (i.e. no assumptions used).
    See Also:
    IProblem.isSatisfiable(IVecInt), IProblem.isSatisfiable(IVecInt, boolean)
  - primeImplicant
```
public int[] primeImplicant()
```
    Description copied from interface: IProblem
    
    Provide a prime implicant, i.e. a set of literal that is sufficient to satisfy all constraints of the problem.
    
    Specified by:
    
    primeImplicant in interface IProblem
    
    Returns:
    a prime implicant of the formula as an array of literal, Dimacs format.
  - primeImplicant
```
public boolean primeImplicant(int p)
```
    Description copied from interface: IProblem
    
    Check if a given literal is part of the prime implicant computed by the IProblem.primeImplicant() method.
    
    Specified by:
    
    primeImplicant in interface IProblem
    
    Parameters:
    p - a literal in Dimacs format
    
    Returns:
    true iff p belongs to IProblem.primeImplicant()
    Since:
    
    2.3.2
  - getSolvers
```
public List<S> getSolvers()
```
  - modelWithInternalVariables
```
public int[] modelWithInternalVariables()
```
    Description copied from interface: ISolver
    
    That method is designed to be used to retrieve the real model of the current set of constraints, i.e. to provide the truth value of boolean variables used internally in the solver (for encoding purposes for instance). If no variables are added in the solver, then Arrays.equals(model(),modelWithInternalVariables()). In case new variables are added to the solver, then the number of models returned by that method is greater of equal to the number of models returned by model() when using a ModelIterator.
    
    Specified by:
    
    modelWithInternalVariables in interface ISolver
    
    Returns:
    an array of literals, in Dimacs format, corresponding to a model of the formula over all the variables declared in the solver.
    See Also:
    IProblem.model(), ModelIterator
  - realNumberOfVariables
```
public int realNumberOfVariables()
```
    Description copied from interface: ISolver
    
    Retrieve the real number of variables used in the solver. In many cases, realNumberOfVariables()==nVars(). However, when working with SAT encodings or translation from MAXSAT to PMS, one can have realNumberOfVariables()>nVars(). Those additional variables are supposed to be created using the ISolver.nextFreeVarId(boolean) method.
    
    Specified by:
    
    realNumberOfVariables in interface ISolver
    
    Returns:
    the number of variables reserved in the solver.
    See Also:
    ISolver.nextFreeVarId(boolean)
  - registerLiteral
```
public void registerLiteral(int p)
```
    Description copied from interface: ISolver
    
    Tell the solver to consider that the literal is in the CNF. Since model() only return the truth value of the literals that appear in the solver, it is sometimes required that the solver provides a default truth value for a given literal. This happens for instance for MaxSat.
    
    Specified by:
    
    registerLiteral in interface ISolver
    
    Parameters:
    p - the literal in Dimacs format that should appear in the model.
  - isSolverKeptHot
```
public boolean isSolverKeptHot()
```
    Description copied from interface: ISolver
    
    Ask to the solver if it is in "hot" mode, meaning that the heuristics is not reset after call is isSatisfiable(). This is only useful in case of repeated calls to the solver with same set of variables.
    
    Specified by:
    
    isSolverKeptHot in interface ISolver
    
    Returns:
    true iff the solver keep the heuristics value unchanged across calls.
  - setKeepSolverHot
```
public void setKeepSolverHot(boolean value)
```
    Description copied from interface: ISolver
    
    Changed the behavior of the SAT solver heuristics between successive calls. If the value is true, then the solver will be "hot" on reuse, i.e. the heuristics will not be reset. Else the heuristics will be reset.
    
    Specified by:
    
    setKeepSolverHot in interface ISolver
    
    Parameters:
    value - true to keep the heuristics values across calls, false either.
  - getSolvingEngine
```
public ISolver getSolvingEngine()
```
    Description copied from interface: ISolver
    
    Retrieve the real engine in case the engine is decorated by one or several decorator. This can be used for instance to setup the engine, which requires to bypass all the decorators. It is thus safe to downcast the ISolver to an ICDCL interface. We cannot directly return an ICDCL object because we are not on the same abstraction level here.
    
    Specified by:
    
    getSolvingEngine in interface ISolver
    
    Returns:
    the solver
  - printStat
```
public void printStat(PrintWriter out)
```
    Description copied from interface: ISolver
    
    Display statistics to the given output writer
    
    Specified by:
    
    printStat in interface ISolver
    
    Since:
    
    2.3.3
    
    See Also:
    ISolver.setLogPrefix(String)
  - printInfos
```
public void printInfos(PrintWriter out)
```
    Description copied from interface: IProblem
    
    To print additional informations regarding the problem.
    
    Specified by:
    
    printInfos in interface IProblem
    
    Parameters:
    out - the place to print the information
    Since:
    
    2.3.3
    
    See Also:
    #setLogPrefix(String)

Class ManyCore<S extends ISolver>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

solvers

numberOfSolvers

Constructor Detail

ManyCore

ManyCore

ManyCore

Method Detail

addAllClauses

addAtLeast

addAtMost

addExactly

addClause

clearLearntClauses

expireTimeout

getStat

getTimeout

getTimeoutMs

newVar

newVar

printStat

printStat

removeConstr

reset

setExpectedNumberOfClauses

setTimeout

setTimeoutMs

setTimeoutOnConflicts

toString

findModel

findModel

isSatisfiable

isSatisfiable

isSatisfiable

isSatisfiable

model

model

nConstraints

nVars

printInfos

onFinishWithAnswer

isDBSimplificationAllowed

setDBSimplificationAllowed

setSearchListener

getSearchListener

nextFreeVarId

addBlockingClause

removeSubsumedConstr

isVerbose

setVerbose

setLogPrefix

getLogPrefix

unsatExplanation

primeImplicant

primeImplicant

getSolvers

modelWithInternalVariables

realNumberOfVariables

registerLiteral

isSolverKeptHot

setKeepSolverHot

getSolvingEngine

printStat

printInfos