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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* */
/* This file is part of the program and library */
/* SCIP --- Solving Constraint Integer Programs */
/* */
/* Copyright 2002-2022 Zuse Institute Berlin */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* */
/* You should have received a copy of the Apache-2.0 license */
/* along with SCIP; see the file LICENSE. If not visit scipopt.org. */
/* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**@file event_estim.h
* @ingroup EVENTS
* @brief event handler for tree size estimation and restarts
*
* This event handler plugin provides different methods for approximating the current fraction of the search
* that has already been completed and for estimating the total tree size at completion.
* It can trigger restarts of the current run if the current run seems hopeless.
*
* For details about the available approximations of search completion, please see
*
* Anderson, Hendel, Le Bodic, Pfetsch
* Estimating The Size of Branch-and-Bound Trees
* under preparation
*
* This code is a largely enriched version of a code that was used for clairvoyant restarts, see
*
* Anderson, Hendel, Le Bodic, Viernickel
* Clairvoyant Restarts in Branch-and-Bound Search Using Online Tree-Size Estimation
* AAAI-19: Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence, 2018
*
* @author Gregor Hendel
*/
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
#ifndef __SCIP_EVENT_ESTIM_H__
#define __SCIP_EVENT_ESTIM_H__
#include "scip/type_scip.h"
#include "scip/def.h"
#ifdef __cplusplus
extern "C" {
#endif
/** creates event handler for tree size estimation */
SCIP_EXPORT
SCIP_RETCODE SCIPincludeEventHdlrEstim(
SCIP* scip /**< SCIP data structure */
);
/* return an estimation of the final tree size */
SCIP_EXPORT
SCIP_Real SCIPgetTreesizeEstimation(
SCIP* scip /**< SCIP data structure */
);
#ifdef __cplusplus
}
#endif
#endif