Call for Papers

The 22nd International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research (CPAIOR 2025) will be held in Melbourne, Australia, from November 10 to November 13, 2025. The conference will be co-located with ICAPS 2025 and KR 2025.

While the conference will take place later in the year than usual, papers are still due in December 2024, in order to not interfere with the usual sequence of conference deadlines.

Aim and Scope

The aim of CPAIOR is to promote a space where researchers from Constraint Programming (CP), Artificial Intelligence (AI), and Operations Research (OR) present innovative techniques, new applications, and original cutting-edge ideas, thereby encouraging researchers from one area to learn from the others. Of particular interest to the conference are papers that integrate concepts and methodologies from these different fields, either proposing interesting new techniques for complex/practical problems or expanding our theoretical insights and cross-field understanding. However, high-quality original papers from a single area are welcome when also relevant to the other communities involved. The conference also strongly encourages regular papers or experience reports showcasing CP/AI/OR techniques on challenging real-world applications.

Topics of Interest

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

• New methodologies in the interface between predictive and prescriptive pipelines, such as machine learning techniques applied to tackle optimization problems and, conversely, CP/OR techniques to address AI and machine learning tasks.
• Novel relaxation and inference methods based on constraint propagation, polyhedral techniques/cutting planes, convex/second-order conic optimization, graph-based algorithms, dynamic programming, and decision diagrams for optimization.
• New search perspectives involving enumeration/branch-and-bound strategies, innovative decomposition techniques (e.g., based on column generation/Benders), intelligent backtracking, incomplete search, and learning-based heuristics.
• Advanced integrated methods that expose new model transformations, communication strategies across MIP/CP/SAT solvers, distributed solution techniques, and solver selection (e.g., portfolio approaches).
• Innovative models and applications of CP/AI/OR techniques.
• Implementation or evaluation of CP/AI/OR techniques and optimization systems.

Submission Types

Submissions are of two types:

1. Regular Papers: Submitted for publication and presentation.

   • 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 eligible for awards. Short papers are particularly encouraged for interesting and novel work in progress.

2. Extended Abstracts: Submitted for presentation only (not formally published in LNCS, but a collection will be published on the conference website).

   • Length: One or two pages.
   • May present preliminary work or work already published in other outlets (should state the outlet).

Submission Guidelines

• Review Process: Single-blind (author names are visible to reviewers, reviewer names are hidden from authors).
• Proceedings: Published in the Springer Lecture Notes in Computer Science series (LNCS).
• Format: Papers should be prepared in the LNCS format. Instructions and templates can be found on the Springer website.
• Submission Platform: OpenReview.net
• Originality: Papers submitted to CPAIOR must not be under review at a different venue at the same time.

Important Dates (Regular Papers)

• Abstracts Due: December 8, 2024 (AoE)
• Full Papers Due: December 15, 2024 (AoE, no extension possible)
• Rebuttal Phase: January 26-29, 2025 (AoE)
• Notification of Acceptance: February 10, 2025

Important Dates (Extended Abstracts)

• Abstracts Due: August 2025 (TBA)
• Notification of Acceptance: September 2025 (TBA)

Awards

The conference will recognize a Distinguished Paper Award and a Student Paper Award.

Registration

• Early registration deadline: September 3, 2025.
• More details can be found on the registration page.

Contact Information

For any queries on the submission process, please contact the Program Chair Guido Tack at cpaior2025@gmail.com.