WPTE 2026
12th International Workshop on Rewriting Techniques for Program Transformations and Evaluation
Lisbon, Portugal
Sunday, 19th July 2026
About
The aim of WPTE is to bring together researchers working on program transformations, evaluation, and operationally based programming language semantics, using rewriting methods, in order to share the techniques and recent developments and to exchange ideas to encourage further activation of research in this area.
Important Dates
- Submission, in all three categories:
22nd April 2026 Extended: 29th April 2026 (AoE), at https://submissions.floc26.org/wpte/
- Notification of acceptance: 25th May 2026
- Early registration for the workshop: 1st June 2026
- Final version for informal proceedings: 29th June 2026
- Workshop: 19th July 2026
- Submission to post-proceedings/special issue: autumn 2026 (tbd)
Invited Speakers
Accepted Contributions
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Sound Rewrites for Measurement-Bearing Expressions via Token-Sensitive Enclosure Semantics by David B. Hulak, Arthur Freitas Ramos and Ruy J.G.B. de Queiroz
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A Cyclic Proof System for Trace Formula Implication with Least and Greatest Fixpoints by Takumi Sato and Koji Nakazawa
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Improvement Theory for Probabilistic Call-by-Need by David Sabel and Manfred Schmidt-Schauß
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On Comparing Python Programs Based on Differences in Rewrite Sequences to Support Grading Programming Exercises by Misaki Kojima and Naoki Nishida
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Tactic-driven code fusion by Katarzyna Marek and Clément Pit Claudel
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An Interactive Proof Mode for Dafny Based on Back Translation of Verification Obligations by Ștefan Ciobâcă, K. Rustan M. Leino, Ștefan-Alexandru Mercas and Roxana-Mihaela Timon
Programme Outline
- Session 1 (09:00-10:00)
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- 09:00-10:00: (invited talk)
Staging for Synthesis and Analysis by Nada Amin
- Session 2 (10:30-12:30)
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- 10:30-12:30:
four contributed presentations
- Session 3 (14:30-15:30)
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- 14:30-15:30: (invited talk)
Fully Abstract Normal Form Bisimulation for Call-by-Value PCF by Nikos Tzevelekos
- Session 4 (16:00-17:30)
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- 16:00-17:00:
two contributed presentations
- 17:00-17:30:
business meeting
Topics of Interest
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Correctness of program transformations, optimizations and translations.
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Program transformations for proving termination, confluence, and other properties.
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Correctness of evaluation strategies.
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Operational semantics of programs, operationally-based program equivalences such as contextual equivalences and bisimulations.
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Cost-models for arguing about the optimizing power of transformations and the costs of evaluation.
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Program transformations for verification and theorem proving purposes.
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Translation, simulation, equivalence of programs with different formalisms, and evaluation strategies.
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Program transformations for applying rewriting techniques to programs in specific programming languages.
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Program transformations for program inversions and program synthesis.
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Program transformation and evaluation for Haskell and rewriting.
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Rewriting-based transformations for bidirectional programming and reversible computation.
Program Committee
- Martin Avanzini, Inria Sophia Antipolis
- Carsten Fuhs (co-chair), Birkbeck, University of London
- Jan-Christoph Kassing, RWTH Aachen University
- Thomas Kœhler, ICube Lab, CNRS, Université de Strasbourg
- Misaki Kojima, Nagoya University
- Rubén Rubio, Universidad Complutense de Madrid
- Traian Şerbănuţă, University of Bucharest
- Germán Vidal, Universitat Politècnica de València
- Janis Voigtländer (co-chair), University of Duisburg-Essen
Steering Committee
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Ștefan Ciobâcă, Alexandru Ioan Cuza University, Iași
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Horatiu Cirstea, LORIA, Université de Lorraine
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Santiago Escobar, Universitat Politècnica de València
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Cynthia Kop, Radboud University Nijmegen
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Joachim Niehren, Inria Lille
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Naoki Nishida, Nagoya University
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David Sabel, RheinMain University of Applied Sciences, Wiesbaden
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Manfred Schmidt-Schauß, Goethe-University, Frankfurt am Main
Previous WPTEs