4 Search Results for "Reniers, Michel"

Document
DOI: 10.4230/LIPIcs.ITP.2025.15
Certified Implementability of Global Multiparty Protocols

Authors: Elaine Li and Thomas Wies

Published in: LIPIcs, Volume 352, 16th International Conference on Interactive Theorem Proving (ITP 2025)

Abstract
Implementability is the decision problem at the heart of top-down approaches to protocol verification. In this paper, we present a mechanization of a recently proposed precise implementability characterization by Li et al. for a large class of protocols that subsumes many existing formalisms in the literature. Our protocols and implementations model asynchronous commmunication, and can exhibit infinite behavior. We improve upon their pen-and-paper results by unifying distinct formalisms, simplifying existing proof arguments, elaborating on the construction of canonical implementations, and even uncovering a subtle bug in the semantics for infinite words. As a corollary of our mechanization, we show that the original characterization of implementability applies even to protocols with infinitely many participants. We also contribute a reusable library for reasoning about generic communicating state machines. Our mechanization consists of about 15k lines of Rocq code. We believe that our mechanization can provide the foundation for deductively proving the implementability of protocols beyond the reach of prior work, extracting certified implementations for finite protocols, and investigating implementability under alternative asynchronous communication models.
Cite as

Elaine Li and Thomas Wies. Certified Implementability of Global Multiparty Protocols. In 16th International Conference on Interactive Theorem Proving (ITP 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 352, pp. 15:1-15:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{li_et_al:LIPIcs.ITP.2025.15,
  author =	{Li, Elaine and Wies, Thomas},
  title =	{{Certified Implementability of Global Multiparty Protocols}},
  booktitle =	{16th International Conference on Interactive Theorem Proving (ITP 2025)},
  pages =	{15:1--15:20},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-396-6},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{352},
  editor =	{Forster, Yannick and Keller, Chantal},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ITP.2025.15},
  URN =		{urn:nbn:de:0030-drops-246139},
  doi =		{10.4230/LIPIcs.ITP.2025.15},
  annote =	{Keywords: Asynchronous protocols, communicating state machines, labeled transition systems, infinite semantics, realizability, multiparty session types, choreographies, deadlock freedom}
}
Document
DOI: 10.4230/LIPIcs.CONCUR.2025.35
From Bisimulation to Traces: The Impact of Parallel Composition on Finite Bases

Authors: Rowin Versteeg, Valentina Castiglioni, and Bas Luttik

Published in: LIPIcs, Volume 348, 36th International Conference on Concurrency Theory (CONCUR 2025)

Abstract
We consider process algebras with inaction, action prefix, non-deterministic choice and interleaving parallel composition modulo the behavioural equivalences in van Glabbeek’s linear time-branching time spectrum, and study the existence of finite bases (i.e., finite sound and complete axiomatisations) for these algebras. We prove that if the alphabet of actions is infinite and the behavioural equivalence is either simulation equivalence or trace equivalence, then a finite basis exists and is obtained by extending the known ground-complete axiomatisations for these behavioural equivalences. We prove that if the alphabet of actions is finite, then a finite basis does not exist for these equivalences. We also prove for all behavioural equivalences between ready simulation and completed traces there cannot exist a finite basis irrespective of the cardinality of the alphabet of actions (provided that it is non-empty). Finally, we prove that these results are maintained if the process algebra is extended with a constant for successful termination.
Cite as

Rowin Versteeg, Valentina Castiglioni, and Bas Luttik. From Bisimulation to Traces: The Impact of Parallel Composition on Finite Bases. In 36th International Conference on Concurrency Theory (CONCUR 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 348, pp. 35:1-35:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{versteeg_et_al:LIPIcs.CONCUR.2025.35,
  author =	{Versteeg, Rowin and Castiglioni, Valentina and Luttik, Bas},
  title =	{{From Bisimulation to Traces: The Impact of Parallel Composition on Finite Bases}},
  booktitle =	{36th International Conference on Concurrency Theory (CONCUR 2025)},
  pages =	{35:1--35:18},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-389-8},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{348},
  editor =	{Bouyer, Patricia and van de Pol, Jaco},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2025.35},
  URN =		{urn:nbn:de:0030-drops-239854},
  doi =		{10.4230/LIPIcs.CONCUR.2025.35},
  annote =	{Keywords: Equational basis, Parallel composition, Preorders, Equivalences, Linear time - branching time spectrum}
}
Document
DOI: 10.4230/LITES.8.2.4
A Hybrid Programming Language for Formal Modeling and Verification of Hybrid Systems

Authors: Eduard Kamburjan, Stefan Mitsch, and Reiner Hähnle

Published in: LITES, Volume 8, Issue 2 (2022): Special Issue on Distributed Hybrid Systems. Leibniz Transactions on Embedded Systems, Volume 8, Issue 2

Abstract
Designing and modeling complex cyber-physical systems (CPS) faces the double challenge of combined discrete-continuous dynamics and concurrent behavior. Existing formal modeling and verification languages for CPS expose the underlying proof search technology. They lack high-level structuring elements and are not efficiently executable. The ensuing modeling gap renders formal CPS models hard to understand and to validate. We propose a high-level programming-based approach to formal modeling and verification of hybrid systems as a hybrid extension of an Active Objects language. Well-structured hybrid active programs and requirements allow automatic, reachability-preserving translation into differential dynamic logic, a logic for hybrid (discrete-continuous) programs. Verification is achieved by discharging the resulting formulas with the theorem prover KeYmaera X. We demonstrate the usability of our approach with case studies.
Cite as

Eduard Kamburjan, Stefan Mitsch, and Reiner Hähnle. A Hybrid Programming Language for Formal Modeling and Verification of Hybrid Systems. In LITES, Volume 8, Issue 2 (2022): Special Issue on Distributed Hybrid Systems. Leibniz Transactions on Embedded Systems, Volume 8, Issue 2, pp. 04:1-04:34, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@Article{kamburjan_et_al:LITES.8.2.4,
  author =	{Kamburjan, Eduard and Mitsch, Stefan and H\"{a}hnle, Reiner},
  title =	{{A Hybrid Programming Language for Formal Modeling and Verification of Hybrid Systems}},
  journal =	{Leibniz Transactions on Embedded Systems},
  pages =	{04:1--04:34},
  ISSN =	{2199-2002},
  year =	{2022},
  volume =	{8},
  number =	{2},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LITES.8.2.4},
  URN =		{urn:nbn:de:0030-drops-192965},
  doi =		{10.4230/LITES.8.2.4},
  annote =	{Keywords: Active Objects, Differential Dynamic Logic, Hybrid Systems}
}
Document
DOI: 10.4230/DagSemProc.06351.12
The Formal Specification Language mCRL2

Authors: Jan Friso Groote, Aad Mathijssen, Michel Reniers, Yaroslav Usenko, and Muck van Weerdenburg

Published in: Dagstuhl Seminar Proceedings, Volume 6351, Methods for Modelling Software Systems (MMOSS) (2007)

Abstract
We introduce mCRL2, a specification language that can be used to specify and analyse the behaviour of distributed systems. This language is the successor of the mCRL specification language. The mCRL2 language extends a timed basic process algebra with the possibility to define and use abstract data types. The mCRL2 data language features predefined and higher-order data types. The process algebraic part of mCRL2 allows a faithful translation of coloured Petri nets and component based systems: we have introduced multiactions and we have separated communication and parallelism.
Cite as

Jan Friso Groote, Aad Mathijssen, Michel Reniers, Yaroslav Usenko, and Muck van Weerdenburg. The Formal Specification Language mCRL2. In Methods for Modelling Software Systems (MMOSS). Dagstuhl Seminar Proceedings, Volume 6351, pp. 1-34, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{groote_et_al:DagSemProc.06351.12,
  author =	{Groote, Jan Friso and Mathijssen, Aad and Reniers, Michel and Usenko, Yaroslav and van Weerdenburg, Muck},
  title =	{{The Formal Specification Language mCRL2}},
  booktitle =	{Methods for Modelling Software Systems (MMOSS)},
  pages =	{1--34},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{6351},
  editor =	{Ed Brinksma and David Harel and Angelika Mader and Perdita Stevens and Roel Wieringa},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.06351.12},
  URN =		{urn:nbn:de:0030-drops-8626},
  doi =		{10.4230/DagSemProc.06351.12},
  annote =	{Keywords: Specification language, abstract data types, process algebra, operational semantics}
}
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