org.sosy_lab.solver.api

Interface OptEnvironment

All Superinterfaces:

AutoCloseable, BasicProverEnvironment<Void>

All Known Implementing Classes:

LoggingOptEnvironment

public interface OptEnvironment
extends BasicProverEnvironment<Void>, AutoCloseable

Interface for optimization modulo SMT.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	OptEnvironment.OptStatus Status of the optimization problem.

Method Summary

Modifier and Type	Method and Description
OptEnvironment.OptStatus	check() Optimize the objective function subject to the previously imposed constraints.
String	dump()
Optional<Rational>	lower(int handle, Rational epsilon)
int	maximize(Formula objective) Add the maximization objective.
int	minimize(Formula objective) Add minimization objective.
Optional<Rational>	upper(int handle, Rational epsilon)

Methods inherited from interface org.sosy_lab.solver.api.BasicProverEnvironment

addConstraint, close, evaluate, getModel, isUnsat, pop, push, push

Method Detail

maximize

int maximize(Formula objective)

Add the maximization objective. Note: push/pop may be used for switching objectives

Returns:

Objective handle, to be used for retrieving the value.

minimize

int minimize(Formula objective)

Add minimization objective. Note: push/pop may be used for switching objectives

Returns:

Objective handle, to be used for retrieving the value.

check

OptEnvironment.OptStatus check()
                        throws InterruptedException,
                               SolverException

Optimize the objective function subject to the previously imposed constraints.

Returns:

Status of the optimization problem.

Throws:

InterruptedException

SolverException

upper

Optional<Rational> upper(int handle,
                         Rational epsilon)

Parameters:

epsilon - Value to substitute for the epsilon.

Returns:

Upper approximation of the optimized value, or absent optional if the objective is unbounded.

lower

Optional<Rational> lower(int handle,
                         Rational epsilon)

Parameters:

epsilon - Value to substitute for the epsilon.

Returns:

Lower approximation of the optimized value, or absent optional if the objective is unbounded.

dump

String dump()