*[apologize for multiple postings]* *** 35th International Symposium on Logic-Based Program Synthesis and Transformation (LOPSTR 2025). *** September 9-10, 2025 - University of Calabria, Rende, Italy https://lopstr.github.io/2025/ Part of ICLP 2025 and co-located with PPDP 2025 https://iclp25.demacs.unical.it/ ## IMPORTANT DATES - Abstract submission: May 9, 2025 (AoE) - Paper submission: May 16, 2025 (AoE) - Author notification: June 27, 2025 (AoE) - Camera-ready: July 17, 2025 (AoE) - Symposium: September 9-10, 2025 ## OVERVIEW The aim of the LOPSTR series is to stimulate and promote international research and collaboration on logic-based program development. LOPSTR is open to contributions to logic-based program development in any programming language paradigm. LOPSTR has a reputation for being a lively, friendly forum for presenting and discussing work in progress. LOPSTR 2025 will be held at the University of Calabria, Rende, Italy. It will be co-located with ICLP 2025 and PPDP 2025. At least one of the authors of an accepted paper is expected to attend the conference and present the paper. Information about venue and travel will be available on the ICLP 2025 website. Topics of interest include all aspects of logic-based program development, all stages of the software life cycle, and issues of both programming-in-the-small and programming-in-the-large, including, but not limited to: - synthesis - transformation - specialization - inversion - composition - optimisation - specification - analysis and verification - testing and certification - program and model manipulation - AI methods for program development - verification and testing of AI-based systems - transformational techniques in software engineering - logic-based methods for security - logic-based methods for cyber-physical and distributed systems - applications, tools, and industrial practice Survey papers that present some aspects of the above topics from a new perspective and papers that describe experience with industrial applications and case studies are also welcome. ## PAPER SUBMISSION Submissions can be made in two categories: - Regular Papers (15 pages max.) - Short Papers (8 pages max.) References will NOT count towards the page limit. Additional pages may be used for appendices not intended for publication. Reviewers are not required to read the appendices, and thus papers should be intelligible without them. All submissions must be written in English. Submissions must not substantially overlap with papers/tools that have been published or that are simultaneously submitted to a journal, conference, or workshop with refereed proceedings. Submissions of Regular Papers must describe original work. Work that already appeared in unpublished or informally published workshop proceedings may be submitted (please contact the PC Chairs in case of questions). Submissions of Short Papers may include presentations of exciting if not fully polished research or tool demonstrations that are of academic and industrial interest. Tool demonstrations should describe the relevant system, usability, and implementation aspects of a tool. All accepted papers will be included in the conference proceedings and published by Springer as a Lecture Notes in Computer Science (LNCS) volume. After the symposium, a selection of a few best papers will be invited for submission to rapid publication in the Journal of Theory and Practice of Logic Programming (TPLP). Authors of selected papers will be invited to revise and/or extend their submissions to be considered for publication. The papers submitted to TPLP will be subject to the journal's standard reviewing process. ## SUBMISSION GUIDELINES Authors should submit an electronic copy of the paper (written in English) in PDF, formatted in the Lecture Notes in Computer Science style. Each submission must include on its first page the paper title; authors and their affiliations; contact author's email; abstract; and three to four keywords which will be used to assist the PC in selecting appropriate reviewers for the paper. Authors should consult Springer's authors' instructions on the author's page, and use their proceedings templates, either for LaTeX (available also in Overleaf) or for Word, for the preparation of their papers. Springer encourages authors to include their ORCIDs in their papers. In addition, upon acceptance, the corresponding author of each paper, acting on behalf of all of the authors of that paper, must complete and sign a Consent-to-Publish form. The corresponding author signing the copyright form should match the corresponding author marked on the paper. Once the files have been sent to Springer, changes relating to the authorship of the papers cannot be made. Page numbers (and, if possible, line numbers) should appear on the manuscript to help the reviewers in writing their report. So, for LaTeX, we recommend that authors use: \pagestyle{plain} \usepackage{lineno} \linenumbers Papers should be submitted via EasyChair: https://easychair.org/conferences/?conf=lopstr2025 ## PROGRAM CHAIRS Santiago Escobar, Univesitat Politecnica de Valencia, Spain Laura Titolo, Code Metal, USA ## PUBLICITY CHAIR Manuel Borroto, University of Calabria, Italy ## HISTORY LOPSTR is a renowned symposium that has been held for more than 30 years. The first meeting was held in Manchester, UK in 1991. Information about previous symposia: http://lopstr.webs.upv.es/. You can find the contents of past LOPSTR symposia at DBLP (https://dblp.uni-trier.de/db/conf/lopstr/index.html) and past LNCS proceedings at Springer (https://link.springer.com/conference/lopstr).