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CPAIOR 2019 : Sixteenth International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research


Conference Series : Integration of AI and OR Techniques in Constraint Programming
When Jun 4, 2019 - Jun 7, 2019
Where Thessaloniki, Greece
Abstract Registration Due Nov 18, 2018
Submission Deadline Nov 27, 2018
Notification Due Jan 31, 2019
Final Version Due Mar 1, 2019
Categories    computer science   artificial intelligence   operations research   constraint programming

Call For Papers

The 16th International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research will be held in Thessaloniki, Greece, June 4 – 7, 2019.

The aim of the conference is to bring together interested researchers from Constraint Programming (CP), Artificial Intelligence (AI), and Operations Research (OR) to present new techniques or applications and to provide an opportunity for researchers in one area to learn about techniques in the others. A main objective of this conference series is also to give these researchers the opportunity to show how the integration of techniques from different fields can lead to interesting results on large and complex problems. Therefore, papers that actively combine, integrate, or contrast approaches from more than one of the areas are especially solicited. High quality papers from a single area are also welcome, if they are of interest to other communities involved. Application papers showcasing CP/AI/OR techniques on novel and challenging applications or experience reports on such applications are strongly encouraged.

The program committee invites submissions that include but are not limited to the following topics:

Inference and relaxation methods: constraint propagation, cutting planes, global constraints, graph algorithms, dynamic programming, Lagrangian and convex relaxations, heuristic functions based on constraint relaxation.
Search methods: branch and bound, intelligent backtracking, incomplete search, randomized search, portfolios, column generation, Benders decompositions or any other decomposition methods, local search, meta-heuristics.
AI and Machine Learning techniques applied to solve optimization and Operations Research problems.
Integration methods: solver communication, model transformations and solver selection, parallel and distributed solving, combining machine learning with combinatorial optimization.
Modeling methods: comparison of models, symmetry breaking, uncertainty, dominance relationships.
Innovative applications of CP/AI/OR techniques.
Implementation of CP/AI/OR techniques and optimization systems.

Submissions are of two types: regular papers (submitted for publication and presentation) and extended abstracts (submitted for presentation only). Outstanding regular paper submissions may be invited to be published directly in the journal Constraints through a ‘fast track’ process.

This year’s conference will, as last year, give a distinguished paper award and a student paper award.


Regular papers should present original unpublished work and can be of two types:

long papers (at most 15 pages plus references)
short papers (at most 8 pages plus references)

Both long and short papers will undergo rigorous review and are subject to the same criteria of quality. Both types are also eligible for distinguished paper or student paper award. Short papers are particularly encouraged for interesting and novel work in progress, for which the practical or theoretical relevance is not yet fully identified.

The conference proceedings will be published in the Springer Lecture Notes in Computer Science series. All regular papers should be prepared in the format used for that series (

Submission schedule for regular papers (both long and short):

Abstracts: November 18, 2018
Full papers: November 27, 2018
Rebuttal Phase: January 6 – 20, 2019
Notification: January 31, 2019
Camera-ready version: March 1, 2019


Extended abstracts should be 1 or 2 pages in length and may present preliminary work or work already published in other outlets. The extended abstracts are submitted for presentation only (if accepted), and will not be formally published in the LNCS conference volume. A collection of the accepted extended abstracts will be published on the conference website. A submission representing work submitted or published in another outlet should state that outlet. Extended abstracts will be reviewed to ensure appropriateness for the conference.

Submission schedule for extended abstracts:

Abstract: March 1, 2019
Notification: March 16, 2019


A selection of outstanding submissions to the technical program will be offered the opportunity to be published exclusively through a ‘fast track’ process in the journal Constraints.

If the authors opt for this option, their papers will be published on the web site of the conference so they are available for consultation. After the conference the extended version should be submitted to the Constraints journal and the process will be accelerated by the fact that the Editors will ask the same PC members to review it. Invited authors who select to fast track their paper will receive a 1-page extended abstract in the conference proceedings and will be invited to present at the conference on the same ground as any other accepted submission.

Submission Process

All papers are to be submitted electronically in PDF format by following the instructions at the URL


For any queries on the submission process, please contact the Program Chairs Louis-Martin Rousseau and Kostas Stergiou at:

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