Solver interface class with a pointer to a Couenne cut generator. More...
#include <CouenneSolverInterface.hpp>
Public Member Functions | |
CouenneSolverInterface (CouenneCutGenerator *cg=NULL) | |
Constructor. | |
CouenneSolverInterface (const CouenneSolverInterface &src) | |
Copy constructor. | |
~CouenneSolverInterface () | |
Destructor. | |
virtual OsiSolverInterface * | clone (bool copyData=true) const |
Clone. | |
virtual bool | isProvenPrimalInfeasible () const |
we need to overwrite this since we might have internal knowledge | |
virtual bool | isProvenOptimal () const |
we need to overwrite this since we might have internal knowledge | |
CouenneCutGenerator * | CutGen () |
Return cut generator pointer. | |
void | setCutGenPtr (CouenneCutGenerator *cg) |
Set cut generator pointer after setup, to avoid changes in the pointer due to cut generator cloning (it happens twice in the algorithm). | |
virtual void | initialSolve () |
Solve initial LP relaxation. | |
virtual void | resolve () |
Resolve an LP relaxation after problem modification. | |
virtual void | resolve_nobt () |
Resolve an LP without applying bound tightening beforehand. | |
virtual int | tightenBounds (int lightweight) |
Tighten bounds on all variables (including continuous). | |
bool | isProvenDualInfeasible () const |
set doingResolve_ | |
virtual double | getObjValue () const |
Get the objective function value. | |
Methods for strong branching. | |
virtual void | markHotStart () |
Create a hot start snapshot of the optimization process. | |
virtual void | solveFromHotStart () |
Optimize starting from the hot start snapshot. | |
virtual void | unmarkHotStart () |
Delete the hot start snapshot. | |
Protected Member Functions | |
virtual int | tightenBoundsCLP (int lightweight) |
Copy of the Clp version --- not light version. | |
virtual int | tightenBoundsCLP_Light (int lightweight) |
Copy of the Clp version --- light version. | |
Protected Attributes | |
CouenneCutGenerator * | cutgen_ |
The pointer to the Couenne cut generator. | |
bool | knowInfeasible_ |
Flag indicating that infeasibility was detected during solveFromHotStart. | |
bool | knowOptimal_ |
Flag indicating that optimality was detected during solveFromHotStart. | |
bool | knowDualInfeasible_ |
Flag indicating this problem's continuous relaxation is unbounded. |
Solver interface class with a pointer to a Couenne cut generator.
Its main purposes are:
1) to apply bound tightening before re-solving 2) to replace OsiSolverInterface::isInteger () with problem_ -> [expression] -> isInteger () 3) to use NLP solution at branching
Definition at line 27 of file CouenneSolverInterface.hpp.
Couenne::CouenneSolverInterface< T >::CouenneSolverInterface | ( | CouenneCutGenerator * | cg = NULL |
) | [inline] |
Couenne::CouenneSolverInterface< T >::CouenneSolverInterface | ( | const CouenneSolverInterface< T > & | src | ) | [inline] |
Couenne::CouenneSolverInterface< T >::~CouenneSolverInterface | ( | ) | [inline] |
Destructor.
Definition at line 52 of file CouenneSolverInterface.cpp.
virtual OsiSolverInterface* Couenne::CouenneSolverInterface< T >::clone | ( | bool | copyData = true |
) | const [inline, virtual] |
Clone.
Definition at line 41 of file CouenneSolverInterface.hpp.
bool Couenne::CouenneSolverInterface< T >::isProvenPrimalInfeasible | ( | ) | const [inline, virtual] |
we need to overwrite this since we might have internal knowledge
Definition at line 91 of file CouenneSolverInterface.cpp.
bool Couenne::CouenneSolverInterface< T >::isProvenOptimal | ( | ) | const [inline, virtual] |
we need to overwrite this since we might have internal knowledge
Definition at line 96 of file CouenneSolverInterface.cpp.
CouenneCutGenerator* Couenne::CouenneSolverInterface< T >::CutGen | ( | ) | [inline] |
Return cut generator pointer.
Definition at line 51 of file CouenneSolverInterface.hpp.
void Couenne::CouenneSolverInterface< T >::setCutGenPtr | ( | CouenneCutGenerator * | cg | ) | [inline] |
Set cut generator pointer after setup, to avoid changes in the pointer due to cut generator cloning (it happens twice in the algorithm).
Definition at line 57 of file CouenneSolverInterface.hpp.
void Couenne::CouenneSolverInterface< T >::initialSolve | ( | ) | [inline, virtual] |
Solve initial LP relaxation.
Definition at line 60 of file CouenneSolverInterface.cpp.
void Couenne::CouenneSolverInterface< T >::resolve | ( | ) | [inline, virtual] |
Resolve an LP relaxation after problem modification.
Definition at line 111 of file CouenneSolverInterface.cpp.
virtual void Couenne::CouenneSolverInterface< T >::resolve_nobt | ( | ) | [inline, virtual] |
Resolve an LP without applying bound tightening beforehand.
Definition at line 70 of file CouenneSolverInterface.hpp.
void Couenne::CouenneSolverInterface< T >::markHotStart | ( | ) | [inline, virtual] |
Create a hot start snapshot of the optimization process.
Definition at line 290 of file CouenneSolverInterface.cpp.
void Couenne::CouenneSolverInterface< T >::solveFromHotStart | ( | ) | [inline, virtual] |
Optimize starting from the hot start snapshot.
Definition at line 302 of file CouenneSolverInterface.cpp.
void Couenne::CouenneSolverInterface< T >::unmarkHotStart | ( | ) | [inline, virtual] |
Delete the hot start snapshot.
Definition at line 296 of file CouenneSolverInterface.cpp.
int Couenne::CouenneSolverInterface< T >::tightenBounds | ( | int | lightweight | ) | [inline, virtual] |
Tighten bounds on all variables (including continuous).
Definition at line 19 of file CouenneLPtightenBounds.cpp.
bool Couenne::CouenneSolverInterface< T >::isProvenDualInfeasible | ( | ) | const [inline] |
set doingResolve_
is this problem unbounded?
Definition at line 101 of file CouenneSolverInterface.cpp.
double Couenne::CouenneSolverInterface< T >::getObjValue | ( | ) | const [inline, virtual] |
Get the objective function value.
Modified due to possible constant objectives passed to Couenne
Definition at line 331 of file CouenneSolverInterface.cpp.
int Couenne::CouenneSolverInterface< T >::tightenBoundsCLP | ( | int | lightweight | ) | [inline, protected, virtual] |
Copy of the Clp version --- not light version.
Definition at line 23 of file CouenneLPtightenBoundsCLP.cpp.
int Couenne::CouenneSolverInterface< T >::tightenBoundsCLP_Light | ( | int | lightweight | ) | [inline, protected, virtual] |
Copy of the Clp version --- light version.
Definition at line 21 of file CouenneLPtightenBoundsCLP-light.cpp.
CouenneCutGenerator* Couenne::CouenneSolverInterface< T >::cutgen_ [protected] |
The pointer to the Couenne cut generator.
Gives us a lot of information, for instance the nlp solver pointer, and the chance to do bound tightening before resolve ().
Definition at line 112 of file CouenneSolverInterface.hpp.
bool Couenne::CouenneSolverInterface< T >::knowInfeasible_ [protected] |
Flag indicating that infeasibility was detected during solveFromHotStart.
Definition at line 115 of file CouenneSolverInterface.hpp.
bool Couenne::CouenneSolverInterface< T >::knowOptimal_ [protected] |
Flag indicating that optimality was detected during solveFromHotStart.
Definition at line 118 of file CouenneSolverInterface.hpp.
bool Couenne::CouenneSolverInterface< T >::knowDualInfeasible_ [protected] |
Flag indicating this problem's continuous relaxation is unbounded.
Definition at line 121 of file CouenneSolverInterface.hpp.