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Documents authored by Muscholl, Anca

Document
DOI: 10.4230/DagRep.13.5.96
Regular Transformations (Dagstuhl Seminar 23202)

Authors: Rajeev Alur, Mikołaj Bojańczyk, Emmanuel Filiot, Anca Muscholl, and Sarah Winter

Published in: Dagstuhl Reports, Volume 13, Issue 5 (2023)

Abstract
This report documents the program and the outcomes of the Dagstuhl Seminar 23202 "Regular Transformations". The goal of this seminar was to advance on a list of topics about transducers that have gathered much interest recently, and to explore new connections between the theory of regular transformations and its applications in linguistics.
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Rajeev Alur, Mikołaj Bojańczyk, Emmanuel Filiot, Anca Muscholl, and Sarah Winter. Regular Transformations (Dagstuhl Seminar 23202). In Dagstuhl Reports, Volume 13, Issue 5, pp. 96-113, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@Article{alur_et_al:DagRep.13.5.96,
  author =	{Alur, Rajeev and Boja\'{n}czyk, Miko{\l}aj and Filiot, Emmanuel and Muscholl, Anca and Winter, Sarah},
  title =	{{Regular Transformations (Dagstuhl Seminar 23202)}},
  pages =	{96--113},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2023},
  volume =	{13},
  number =	{5},
  editor =	{Alur, Rajeev and Boja\'{n}czyk, Miko{\l}aj and Filiot, Emmanuel and Muscholl, Anca and Winter, Sarah},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagRep.13.5.96},
  URN =		{urn:nbn:de:0030-drops-193663},
  doi =		{10.4230/DagRep.13.5.96},
  annote =	{Keywords: transducers; (poly-)regular functions; linguistic transformations}
}
Document
DOI: 10.4230/LIPIcs.CONCUR.2023.24
Model-Checking Parametric Lock-Sharing Systems Against Regular Constraints

Authors: Corto Mascle, Anca Muscholl, and Igor Walukiewicz

Published in: LIPIcs, Volume 279, 34th International Conference on Concurrency Theory (CONCUR 2023)

Abstract
In parametric lock-sharing systems processes can spawn new processes to run in parallel, and can create new locks. The behavior of every process is given by a pushdown automaton. We consider infinite behaviors of such systems under strong process fairness condition. A result of a potentially infinite execution of a system is a limit configuration, that is a potentially infinite tree. The verification problem is to determine if a given system has a limit configuration satisfying a given regular property. This formulation of the problem encompasses verification of reachability as well as of many liveness properties. We show that this verification problem, while undecidable in general, is decidable for nested lock usage. We show Exptime-completeness of the verification problem. The main source of complexity is the number of parameters in the spawn operation. If the number of parameters is bounded, our algorithm works in Ptime for properties expressed by parity automata with a fixed number of ranks.
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Corto Mascle, Anca Muscholl, and Igor Walukiewicz. Model-Checking Parametric Lock-Sharing Systems Against Regular Constraints. In 34th International Conference on Concurrency Theory (CONCUR 2023). Leibniz International Proceedings in Informatics (LIPIcs), Volume 279, pp. 24:1-24:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{mascle_et_al:LIPIcs.CONCUR.2023.24,
  author =	{Mascle, Corto and Muscholl, Anca and Walukiewicz, Igor},
  title =	{{Model-Checking Parametric Lock-Sharing Systems Against Regular Constraints}},
  booktitle =	{34th International Conference on Concurrency Theory (CONCUR 2023)},
  pages =	{24:1--24:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-299-0},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{279},
  editor =	{P\'{e}rez, Guillermo A. and Raskin, Jean-Fran\c{c}ois},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2023.24},
  URN =		{urn:nbn:de:0030-drops-190184},
  doi =		{10.4230/LIPIcs.CONCUR.2023.24},
  annote =	{Keywords: Parametric systems, Locks, Model-checking}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.CONCUR.2022
LIPIcs, Volume 243, CONCUR 2022, Complete Volume

Authors: Bartek Klin, Sławomir Lasota, and Anca Muscholl

Published in: LIPIcs, Volume 243, 33rd International Conference on Concurrency Theory (CONCUR 2022)

Abstract
LIPIcs, Volume 243, CONCUR 2022, Complete Volume
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33rd International Conference on Concurrency Theory (CONCUR 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 243, pp. 1-712, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@Proceedings{klin_et_al:LIPIcs.CONCUR.2022,
  title =	{{LIPIcs, Volume 243, CONCUR 2022, Complete Volume}},
  booktitle =	{33rd International Conference on Concurrency Theory (CONCUR 2022)},
  pages =	{1--712},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-246-4},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{243},
  editor =	{Klin, Bartek and Lasota, S{\l}awomir and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2022},
  URN =		{urn:nbn:de:0030-drops-170623},
  doi =		{10.4230/LIPIcs.CONCUR.2022},
  annote =	{Keywords: LIPIcs, Volume 243, CONCUR 2022, Complete Volume}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.CONCUR.2022.0
Front Matter, Table of Contents, Preface, Conference Organization

Authors: Bartek Klin, Sławomir Lasota, and Anca Muscholl

Published in: LIPIcs, Volume 243, 33rd International Conference on Concurrency Theory (CONCUR 2022)

Abstract
Front Matter, Table of Contents, Preface, Conference Organization
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33rd International Conference on Concurrency Theory (CONCUR 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 243, pp. 0:i-0:x, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@InProceedings{klin_et_al:LIPIcs.CONCUR.2022.0,
  author =	{Klin, Bartek and Lasota, S{\l}awomir and Muscholl, Anca},
  title =	{{Front Matter, Table of Contents, Preface, Conference Organization}},
  booktitle =	{33rd International Conference on Concurrency Theory (CONCUR 2022)},
  pages =	{0:i--0:x},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-246-4},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{243},
  editor =	{Klin, Bartek and Lasota, S{\l}awomir and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2022.0},
  URN =		{urn:nbn:de:0030-drops-170631},
  doi =		{10.4230/LIPIcs.CONCUR.2022.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Conference Organization}
}
Document
Track B: Automata, Logic, Semantics, and Theory of Programming
DOI: 10.4230/LIPIcs.ICALP.2022.125
Distributed Controller Synthesis for Deadlock Avoidance

Authors: Hugo Gimbert, Corto Mascle, Anca Muscholl, and Igor Walukiewicz

Published in: LIPIcs, Volume 229, 49th International Colloquium on Automata, Languages, and Programming (ICALP 2022)

Abstract
We consider the distributed control synthesis problem for systems with locks. The goal is to find local controllers so that the global system does not deadlock. With no restriction this problem is undecidable even for three processes each using a fixed number of locks. We propose two restrictions that make distributed control decidable. The first one is to allow each process to use at most two locks. The problem then becomes complete for the second level of the polynomial time hierarchy, and even in Ptime under some additional assumptions. The dining philosophers problem satisfies these assumptions. The second restriction is a nested usage of locks. In this case the synthesis problem is Nexptime-complete. The drinking philosophers problem falls in this case.
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Hugo Gimbert, Corto Mascle, Anca Muscholl, and Igor Walukiewicz. Distributed Controller Synthesis for Deadlock Avoidance. In 49th International Colloquium on Automata, Languages, and Programming (ICALP 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 229, pp. 125:1-125:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@InProceedings{gimbert_et_al:LIPIcs.ICALP.2022.125,
  author =	{Gimbert, Hugo and Mascle, Corto and Muscholl, Anca and Walukiewicz, Igor},
  title =	{{Distributed Controller Synthesis for Deadlock Avoidance}},
  booktitle =	{49th International Colloquium on Automata, Languages, and Programming (ICALP 2022)},
  pages =	{125:1--125:20},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-235-8},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{229},
  editor =	{Boja\'{n}czyk, Miko{\l}aj and Merelli, Emanuela and Woodruff, David P.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2022.125},
  URN =		{urn:nbn:de:0030-drops-164668},
  doi =		{10.4230/LIPIcs.ICALP.2022.125},
  annote =	{Keywords: Distributed Synthesis, Concurrency, Lock Synchronisation, Deadlock Avoidance}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.CSL.2020
LIPIcs, Volume 152, CSL'20, Complete Volume

Authors: Maribel Fernández and Anca Muscholl

Published in: LIPIcs, Volume 152, 28th EACSL Annual Conference on Computer Science Logic (CSL 2020)

Abstract
LIPIcs, Volume 152, CSL'20, Complete Volume
Cite as

28th EACSL Annual Conference on Computer Science Logic (CSL 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 152, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)

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@Proceedings{fernandez_et_al:LIPIcs.CSL.2020,
  title =	{{LIPIcs, Volume 152, CSL'20, Complete Volume}},
  booktitle =	{28th EACSL Annual Conference on Computer Science Logic (CSL 2020)},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-132-0},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{152},
  editor =	{Fern\'{a}ndez, Maribel and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2020},
  URN =		{urn:nbn:de:0030-drops-117841},
  doi =		{10.4230/LIPIcs.CSL.2020},
  annote =	{Keywords: Theory of computation, Logic}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.CSL.2020.0
Front Matter, Table of Contents, Preface, Conference Organization

Authors: Maribel Fernández and Anca Muscholl

Published in: LIPIcs, Volume 152, 28th EACSL Annual Conference on Computer Science Logic (CSL 2020)

Abstract
Front Matter, Table of Contents, Preface, Conference Organization
Cite as

28th EACSL Annual Conference on Computer Science Logic (CSL 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 152, pp. 0:i-0:xviii, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)

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@InProceedings{fernandez_et_al:LIPIcs.CSL.2020.0,
  author =	{Fern\'{a}ndez, Maribel and Muscholl, Anca},
  title =	{{Front Matter, Table of Contents, Preface, Conference Organization}},
  booktitle =	{28th EACSL Annual Conference on Computer Science Logic (CSL 2020)},
  pages =	{0:i--0:xviii},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-132-0},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{152},
  editor =	{Fern\'{a}ndez, Maribel and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2020.0},
  URN =		{urn:nbn:de:0030-drops-116431},
  doi =		{10.4230/LIPIcs.CSL.2020.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Conference Organization}
}
Document
DOI: 10.4230/LIPIcs.MFCS.2019.69
On Synthesis of Resynchronizers for Transducers

Authors: Sougata Bose, Shankara Narayanan Krishna, Anca Muscholl, Vincent Penelle, and Gabriele Puppis

Published in: LIPIcs, Volume 138, 44th International Symposium on Mathematical Foundations of Computer Science (MFCS 2019)

Abstract
We study two formalisms that allow to compare transducers over words under origin semantics: rational and regular resynchronizers, and show that the former are captured by the latter. We then consider some instances of the following synthesis problem: given transducers T_1,T_2, construct a rational (resp. regular) resynchronizer R, if it exists, such that T_1 is contained in R(T_2) under the origin semantics. We show that synthesis of rational resynchronizers is decidable for functional, and even finite-valued, one-way transducers, and undecidable for relational one-way transducers. In the two-way setting, synthesis of regular resynchronizers is shown to be decidable for unambiguous two-way transducers. For larger classes of two-way transducers, the decidability status is open.
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Sougata Bose, Shankara Narayanan Krishna, Anca Muscholl, Vincent Penelle, and Gabriele Puppis. On Synthesis of Resynchronizers for Transducers. In 44th International Symposium on Mathematical Foundations of Computer Science (MFCS 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 138, pp. 69:1-69:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@InProceedings{bose_et_al:LIPIcs.MFCS.2019.69,
  author =	{Bose, Sougata and Krishna, Shankara Narayanan and Muscholl, Anca and Penelle, Vincent and Puppis, Gabriele},
  title =	{{On Synthesis of Resynchronizers for Transducers}},
  booktitle =	{44th International Symposium on Mathematical Foundations of Computer Science (MFCS 2019)},
  pages =	{69:1--69:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-117-7},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{138},
  editor =	{Rossmanith, Peter and Heggernes, Pinar and Katoen, Joost-Pieter},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.MFCS.2019.69},
  URN =		{urn:nbn:de:0030-drops-110133},
  doi =		{10.4230/LIPIcs.MFCS.2019.69},
  annote =	{Keywords: String transducers, resynchronizers, synthesis}
}
Document
Track B: Automata, Logic, Semantics, and Theory of Programming
DOI: 10.4230/LIPIcs.ICALP.2019.122
Equivalence of Finite-Valued Streaming String Transducers Is Decidable (Track B: Automata, Logic, Semantics, and Theory of Programming)

Authors: Anca Muscholl and Gabriele Puppis

Published in: LIPIcs, Volume 132, 46th International Colloquium on Automata, Languages, and Programming (ICALP 2019)

Abstract
In this paper we provide a positive answer to a question left open by Alur and and Deshmukh in 2011 by showing that equivalence of finite-valued copyless streaming string transducers is decidable.
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Anca Muscholl and Gabriele Puppis. Equivalence of Finite-Valued Streaming String Transducers Is Decidable (Track B: Automata, Logic, Semantics, and Theory of Programming). In 46th International Colloquium on Automata, Languages, and Programming (ICALP 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 132, pp. 122:1-122:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@InProceedings{muscholl_et_al:LIPIcs.ICALP.2019.122,
  author =	{Muscholl, Anca and Puppis, Gabriele},
  title =	{{Equivalence of Finite-Valued Streaming String Transducers Is Decidable}},
  booktitle =	{46th International Colloquium on Automata, Languages, and Programming (ICALP 2019)},
  pages =	{122:1--122:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-109-2},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{132},
  editor =	{Baier, Christel and Chatzigiannakis, Ioannis and Flocchini, Paola and Leonardi, Stefano},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2019.122},
  URN =		{urn:nbn:de:0030-drops-106988},
  doi =		{10.4230/LIPIcs.ICALP.2019.122},
  annote =	{Keywords: String transducers, equivalence, Ehrenfeucht conjecture}
}
Document
Invited Talk
DOI: 10.4230/LIPIcs.STACS.2019.2
The Many Facets of String Transducers (Invited Talk)

Authors: Anca Muscholl and Gabriele Puppis

Published in: LIPIcs, Volume 126, 36th International Symposium on Theoretical Aspects of Computer Science (STACS 2019)

Abstract
Regular word transductions extend the robust notion of regular languages from a qualitative to a quantitative reasoning. They were already considered in early papers of formal language theory, but turned out to be much more challenging. The last decade brought considerable research around various transducer models, aiming to achieve similar robustness as for automata and languages. In this paper we survey some older and more recent results on string transducers. We present classical connections between automata, logic and algebra extended to transducers, some genuine definability questions, and review approaches to the equivalence problem.
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Anca Muscholl and Gabriele Puppis. The Many Facets of String Transducers (Invited Talk). In 36th International Symposium on Theoretical Aspects of Computer Science (STACS 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 126, pp. 2:1-2:21, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@InProceedings{muscholl_et_al:LIPIcs.STACS.2019.2,
  author =	{Muscholl, Anca and Puppis, Gabriele},
  title =	{{The Many Facets of String Transducers}},
  booktitle =	{36th International Symposium on Theoretical Aspects of Computer Science (STACS 2019)},
  pages =	{2:1--2:21},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-100-9},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{126},
  editor =	{Niedermeier, Rolf and Paul, Christophe},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.STACS.2019.2},
  URN =		{urn:nbn:de:0030-drops-102410},
  doi =		{10.4230/LIPIcs.STACS.2019.2},
  annote =	{Keywords: String transducers, complexity}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2018.22
Origin-Equivalence of Two-Way Word Transducers Is in PSPACE

Authors: Sougata Bose, Anca Muscholl, Vincent Penelle, and Gabriele Puppis

Published in: LIPIcs, Volume 122, 38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018)

Abstract
We consider equivalence and containment problems for word transductions. These problems are known to be undecidable when the transductions are relations between words realized by non-deterministic transducers, and become decidable when restricting to functions from words to words. Here we prove that decidability can be equally recovered the origin semantics, that was introduced by Bojanczyk in 2014. We prove that the equivalence and containment problems for two-way word transducers in the origin semantics are PSPACE-complete. We also consider a variant of the containment problem where two-way transducers are compared under the origin semantics, but in a more relaxed way, by allowing distortions of the origins. The possible distortions are described by means of a resynchronization relation. We propose MSO-definable resynchronizers and show that they preserve the decidability of the containment problem under resynchronizations. {}
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Sougata Bose, Anca Muscholl, Vincent Penelle, and Gabriele Puppis. Origin-Equivalence of Two-Way Word Transducers Is in PSPACE. In 38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 122, pp. 22:1-22:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{bose_et_al:LIPIcs.FSTTCS.2018.22,
  author =	{Bose, Sougata and Muscholl, Anca and Penelle, Vincent and Puppis, Gabriele},
  title =	{{Origin-Equivalence of Two-Way Word Transducers Is in PSPACE}},
  booktitle =	{38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018)},
  pages =	{22:1--22:18},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-093-4},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{122},
  editor =	{Ganguly, Sumit and Pandya, Paritosh},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2018.22},
  URN =		{urn:nbn:de:0030-drops-99213},
  doi =		{10.4230/LIPIcs.FSTTCS.2018.22},
  annote =	{Keywords: Transducers, origin semantics, equivalence}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2018.30
On Canonical Models for Rational Functions over Infinite Words

Authors: Emmanuel Filiot, Olivier Gauwin, Nathan Lhote, and Anca Muscholl

Published in: LIPIcs, Volume 122, 38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018)

Abstract
This paper investigates canonical transducers for rational functions over infinite words, i.e., functions of infinite words defined by finite transducers. We first consider sequential functions, defined by finite transducers with a deterministic underlying automaton. We provide a Myhill-Nerode-like characterization, in the vein of Choffrut's result over finite words, from which we derive an algorithm that computes a transducer realizing the function which is minimal and unique (up to the automaton for the domain). The main contribution of the paper is the notion of a canonical transducer for rational functions over infinite words, extending the notion of canonical bimachine due to Reutenauer and Schützenberger from finite to infinite words. As an application, we show that the canonical transducer is aperiodic whenever the function is definable by some aperiodic transducer, or equivalently, by a first-order transduction. This allows to decide whether a rational function of infinite words is first-order definable.
Cite as

Emmanuel Filiot, Olivier Gauwin, Nathan Lhote, and Anca Muscholl. On Canonical Models for Rational Functions over Infinite Words. In 38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 122, pp. 30:1-30:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{filiot_et_al:LIPIcs.FSTTCS.2018.30,
  author =	{Filiot, Emmanuel and Gauwin, Olivier and Lhote, Nathan and Muscholl, Anca},
  title =	{{On Canonical Models for Rational Functions over Infinite Words}},
  booktitle =	{38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018)},
  pages =	{30:1--30:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-093-4},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{122},
  editor =	{Ganguly, Sumit and Pandya, Paritosh},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2018.30},
  URN =		{urn:nbn:de:0030-drops-99295},
  doi =		{10.4230/LIPIcs.FSTTCS.2018.30},
  annote =	{Keywords: transducers, infinite words, minimization, aperiodicty, first-order logic}
}
Document
DOI: 10.4230/DagRep.8.5.60
Formal Methods and Fault-Tolerant Distributed Comp.: Forging an Alliance (Dagstuhl Seminar 18211)

Authors: Javier Esparza, Pierre Fraignaud, Anca Muscholl, and Sergio Rajsbaum

Published in: Dagstuhl Reports, Volume 8, Issue 5 (2019)

Abstract
The Dagstuhl Seminar "Formal Methods and Fault-Tolerant Distributed Computing: Forging an Alliance" took place May 22-25, 2018. Its goal was to strengthen the interaction between researchers from formal methods and from distributed computing, and help the two communities to better identify common research challenges.
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Javier Esparza, Pierre Fraignaud, Anca Muscholl, and Sergio Rajsbaum. Formal Methods and Fault-Tolerant Distributed Comp.: Forging an Alliance (Dagstuhl Seminar 18211). In Dagstuhl Reports, Volume 8, Issue 5, pp. 60-79, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@Article{esparza_et_al:DagRep.8.5.60,
  author =	{Esparza, Javier and Fraignaud, Pierre and Muscholl, Anca and Rajsbaum, Sergio},
  title =	{{Formal Methods and Fault-Tolerant Distributed Comp.: Forging an Alliance (Dagstuhl Seminar 18211)}},
  pages =	{60--79},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2018},
  volume =	{8},
  number =	{5},
  editor =	{Esparza, Javier and Fraignaud, Pierre and Muscholl, Anca and Rajsbaum, Sergio},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagRep.8.5.60},
  URN =		{urn:nbn:de:0030-drops-98933},
  doi =		{10.4230/DagRep.8.5.60},
  annote =	{Keywords: distributed computing, distributed systems, formal verification}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2017.3
Automated Synthesis: a Distributed Viewpoint

Authors: Anca Muscholl

Published in: LIPIcs, Volume 93, 37th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2017)

Abstract
Distributed algorithms are inherently hard to get right, and a major challenge is to come up with automated techniques for error detection and recovery. The talk will survey recent results on the synthesis of distributed monitors and controllers.
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Anca Muscholl. Automated Synthesis: a Distributed Viewpoint. In 37th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 93, pp. 3:1-3:5, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{muscholl:LIPIcs.FSTTCS.2017.3,
  author =	{Muscholl, Anca},
  title =	{{Automated Synthesis: a Distributed Viewpoint}},
  booktitle =	{37th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2017)},
  pages =	{3:1--3:5},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-055-2},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{93},
  editor =	{Lokam, Satya and Ramanujam, R.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2017.3},
  URN =		{urn:nbn:de:0030-drops-84151},
  doi =		{10.4230/LIPIcs.FSTTCS.2017.3},
  annote =	{Keywords: Synthesis, distributed program}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.ICALP.2017
LIPIcs, Volume 80, ICALP'17, Complete Volume

Authors: Ioannis Chatzigiannakis, Piotr Indyk, Fabian Kuhn, and Anca Muscholl

Published in: LIPIcs, Volume 80, 44th International Colloquium on Automata, Languages, and Programming (ICALP 2017)

Abstract
LIPIcs, Volume 80, ICALP'17, Complete Volume
Cite as

44th International Colloquium on Automata, Languages, and Programming (ICALP 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 80, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@Proceedings{chatzigiannakis_et_al:LIPIcs.ICALP.2017,
  title =	{{LIPIcs, Volume 80, ICALP'17, Complete Volume}},
  booktitle =	{44th International Colloquium on Automata, Languages, and Programming (ICALP 2017)},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-041-5},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{80},
  editor =	{Chatzigiannakis, Ioannis and Indyk, Piotr and Kuhn, Fabian and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2017},
  URN =		{urn:nbn:de:0030-drops-75107},
  doi =		{10.4230/LIPIcs.ICALP.2017},
  annote =	{Keywords: Theory of Computation}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.ICALP.2017.0
Front Matter, Table of Contents, Preface, Organization, List of Authors

Authors: Ioannis Chatzigiannakis, Piotr Indyk, Fabian Kuhn, and Anca Muscholl

Published in: LIPIcs, Volume 80, 44th International Colloquium on Automata, Languages, and Programming (ICALP 2017)

Abstract
Front Matter, Table of Contents, Preface, Organization, List of Authors
Cite as

44th International Colloquium on Automata, Languages, and Programming (ICALP 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 80, pp. 0:i-0:xlii, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@InProceedings{chatzigiannakis_et_al:LIPIcs.ICALP.2017.0,
  author =	{Chatzigiannakis, Ioannis and Indyk, Piotr and Kuhn, Fabian and Muscholl, Anca},
  title =	{{Front Matter, Table of Contents, Preface, Organization, List of Authors}},
  booktitle =	{44th International Colloquium on Automata, Languages, and Programming (ICALP 2017)},
  pages =	{0:i--0:xlii},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-041-5},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{80},
  editor =	{Chatzigiannakis, Ioannis and Indyk, Piotr and Kuhn, Fabian and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2017.0},
  URN =		{urn:nbn:de:0030-drops-73663},
  doi =		{10.4230/LIPIcs.ICALP.2017.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Organization, List of Authors}
}
Document
DOI: 10.4230/LIPIcs.STACS.2017.34
On the Decomposition of Finite-Valued Streaming String Transducers

Authors: Paul Gallot, Anca Muscholl, Gabriele Puppis, and Sylvain Salvati

Published in: LIPIcs, Volume 66, 34th Symposium on Theoretical Aspects of Computer Science (STACS 2017)

Abstract
We prove the following decomposition theorem: every 1-register streaming string transducer that associates a uniformly bounded number of outputs with each input can be effectively decomposed as a finite union of functional 1-register streaming string transducers. This theorem relies on a combinatorial result by Kortelainen concerning word equations with iterated factors. Our result implies the decidability of the equivalence problem for the considered class of transducers. This can be seen as a first step towards proving a more general decomposition theorem for streaming string transducers with multiple registers.
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Paul Gallot, Anca Muscholl, Gabriele Puppis, and Sylvain Salvati. On the Decomposition of Finite-Valued Streaming String Transducers. In 34th Symposium on Theoretical Aspects of Computer Science (STACS 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 66, pp. 34:1-34:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@InProceedings{gallot_et_al:LIPIcs.STACS.2017.34,
  author =	{Gallot, Paul and Muscholl, Anca and Puppis, Gabriele and Salvati, Sylvain},
  title =	{{On the Decomposition of Finite-Valued Streaming String Transducers}},
  booktitle =	{34th Symposium on Theoretical Aspects of Computer Science (STACS 2017)},
  pages =	{34:1--34:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-028-6},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{66},
  editor =	{Vollmer, Heribert and Vall\'{e}e, Brigitte},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.STACS.2017.34},
  URN =		{urn:nbn:de:0030-drops-69997},
  doi =		{10.4230/LIPIcs.STACS.2017.34},
  annote =	{Keywords: Streaming Transducers, finite valuedness, equivalence}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.MFCS.2016
LIPIcs, Volume 58, MFCS'16, Complete Volume

Authors: Piotr Faliszewski, Anca Muscholl, and Rolf Niedermeier

Published in: LIPIcs, Volume 58, 41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)

Abstract
LIPIcs, Volume 58, MFCS'16, Complete Volume
Cite as

41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 58, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@Proceedings{faliszewski_et_al:LIPIcs.MFCS.2016,
  title =	{{LIPIcs, Volume 58, MFCS'16, Complete Volume}},
  booktitle =	{41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-016-3},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{58},
  editor =	{Faliszewski, Piotr and Muscholl, Anca and Niedermeier, Rolf},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.MFCS.2016},
  URN =		{urn:nbn:de:0030-drops-65861},
  doi =		{10.4230/LIPIcs.MFCS.2016},
  annote =	{Keywords: Theory of Computation}
}
Document
Invited Talk
DOI: 10.4230/LIPIcs.CSL.2016.3
Automated Synthesis: Going Distributed (Invited Talk)

Authors: Anca Muscholl

Published in: LIPIcs, Volume 62, 25th EACSL Annual Conference on Computer Science Logic (CSL 2016)

Abstract
Synthesis is particularly challenging for concurrent programs. At the same time it is a very promising approach, since concurrent programs are difficult to get right, or to analyze with traditional verification techniques. The talk provides an introduction to distributed synthesis in the setting of Mazurkiewicz traces, and its applications to decentralized runtime monitoring.
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Anca Muscholl. Automated Synthesis: Going Distributed (Invited Talk). In 25th EACSL Annual Conference on Computer Science Logic (CSL 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 62, pp. 3:1-3:2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@InProceedings{muscholl:LIPIcs.CSL.2016.3,
  author =	{Muscholl, Anca},
  title =	{{Automated Synthesis: Going Distributed}},
  booktitle =	{25th EACSL Annual Conference on Computer Science Logic (CSL 2016)},
  pages =	{3:1--3:2},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-022-4},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{62},
  editor =	{Talbot, Jean-Marc and Regnier, Laurent},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2016.3},
  URN =		{urn:nbn:de:0030-drops-65436},
  doi =		{10.4230/LIPIcs.CSL.2016.3},
  annote =	{Keywords: Concurrent programs, Distributed synthesis, Runtime monitoring}
}
Document
DOI: 10.4230/LIPIcs.CONCUR.2016.12
Soundness in Negotiations

Authors: Javier Esparza, Denis Kuperberg, Anca Muscholl, and Igor Walukiewicz

Published in: LIPIcs, Volume 59, 27th International Conference on Concurrency Theory (CONCUR 2016)

Abstract
Negotiations are a formalism for describing multiparty distributed cooperation. Alternatively, they can be seen as a model of concurrency with synchronized choice as communication primitive. Well-designed negotiations must be sound, meaning that, whatever its current state, the negotiation can still be completed. In a former paper, Esparza and Desel have shown that deciding soundness of a negotiation is PSPACE-complete, and in PTIME if the negotiation is deterministic. They have also provided an algorithm for an intermediate class of acyclic, non-deterministic negotiations, but left the complexity of the soundness problem open. In the first part of this paper we study two further analysis problems for sound acyclic deterministic negotiations, called the race and the omission problem, and give polynomial algorithms. We use these results to provide the first polynomial algorithm for some analysis problems of workflow nets with data previously studied by Trcka, van der Aalst, and Sidorova. In the second part we solve the open question of Esparza and Desel's paper. We show that soundness of acyclic, weakly non-deterministic negotiations is in PTIME, and that checking soundness is already NP-complete for slightly more general classes.
Cite as

Javier Esparza, Denis Kuperberg, Anca Muscholl, and Igor Walukiewicz. Soundness in Negotiations. In 27th International Conference on Concurrency Theory (CONCUR 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 59, pp. 12:1-12:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@InProceedings{esparza_et_al:LIPIcs.CONCUR.2016.12,
  author =	{Esparza, Javier and Kuperberg, Denis and Muscholl, Anca and Walukiewicz, Igor},
  title =	{{Soundness in Negotiations}},
  booktitle =	{27th International Conference on Concurrency Theory (CONCUR 2016)},
  pages =	{12:1--12:13},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-017-0},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{59},
  editor =	{Desharnais, Jos\'{e}e and Jagadeesan, Radha},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2016.12},
  URN =		{urn:nbn:de:0030-drops-61636},
  doi =		{10.4230/LIPIcs.CONCUR.2016.12},
  annote =	{Keywords: Negotiations, workflows, soundness, verification, concurrency}
}
Document
DOI: 10.4230/LIPIcs.ICALP.2016.114
Minimizing Resources of Sweeping and Streaming String Transducers

Authors: Félix Baschenis, Olivier Gauwin, Anca Muscholl, and Gabriele Puppis

Published in: LIPIcs, Volume 55, 43rd International Colloquium on Automata, Languages, and Programming (ICALP 2016)

Abstract
We consider minimization problems for natural parameters of word transducers: the number of passes performed by two-way transducers and the number of registers used by streaming transducers. We show how to compute in ExpSpace the minimum number of passes needed to implement a transduction given as sweeping transducer, and we provide effective constructions of transducers of (worst-case optimal) doubly exponential size. We then consider streaming transducers where concatenations of registers are forbidden in the register updates. Based on a correspondence between the number of passes of sweeping transducers and the number of registers of equivalent concatenation-free streaming transducers, we derive a minimization procedure for the number of registers of concatenation-free streaming transducers.
Cite as

Félix Baschenis, Olivier Gauwin, Anca Muscholl, and Gabriele Puppis. Minimizing Resources of Sweeping and Streaming String Transducers. In 43rd International Colloquium on Automata, Languages, and Programming (ICALP 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 55, pp. 114:1-114:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@InProceedings{baschenis_et_al:LIPIcs.ICALP.2016.114,
  author =	{Baschenis, F\'{e}lix and Gauwin, Olivier and Muscholl, Anca and Puppis, Gabriele},
  title =	{{Minimizing Resources of Sweeping and Streaming String Transducers}},
  booktitle =	{43rd International Colloquium on Automata, Languages, and Programming (ICALP 2016)},
  pages =	{114:1--114:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-013-2},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{55},
  editor =	{Chatzigiannakis, Ioannis and Mitzenmacher, Michael and Rabani, Yuval and Sangiorgi, Davide},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2016.114},
  URN =		{urn:nbn:de:0030-drops-62496},
  doi =		{10.4230/LIPIcs.ICALP.2016.114},
  annote =	{Keywords: word transducers, streaming, 2-way, sweeping transducers, minimization}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.MFCS.2016.0
Front Matter, Foreword, Conference Organization, External Reviewers, Table of Contents

Authors: Piotr Faliszewski, Anca Muscholl, and Rolf Niedermeier

Published in: LIPIcs, Volume 58, 41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)

Abstract
Front Matter, Foreword, Conference Organization, External Reviewers, Table of Contents
Cite as

41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 58, pp. 0:i-0:xvi, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@InProceedings{faliszewski_et_al:LIPIcs.MFCS.2016.0,
  author =	{Faliszewski, Piotr and Muscholl, Anca and Niedermeier, Rolf},
  title =	{{Front Matter, Foreword, Conference Organization, External Reviewers, Table of Contents}},
  booktitle =	{41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)},
  pages =	{0:i--0:xvi},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-016-3},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{58},
  editor =	{Faliszewski, Piotr and Muscholl, Anca and Niedermeier, Rolf},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.MFCS.2016.0},
  URN =		{urn:nbn:de:0030-drops-64225},
  doi =		{10.4230/LIPIcs.MFCS.2016.0},
  annote =	{Keywords: front matter, foreword, conference organization, external reviewers, table of contents}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2015.178
One-way Definability of Sweeping Transducer

Authors: Félix Baschenis, Olivier Gauwin, Anca Muscholl, and Gabriele Puppis

Published in: LIPIcs, Volume 45, 35th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2015)

Abstract
Two-way finite-state transducers on words are strictly more expressive than one-way transducers. It has been shown recently how to decide if a two-way functional transducer has an equivalent one-way transducer, and the complexity of the algorithm is non-elementary. We propose an alternative and simpler characterization for sweeping functional transducers, namely, for transducers that can only reverse their head direction at the extremities of the input. Our algorithm works in 2EXPSPACE and, in the positive case, produces an equivalent one-way transducer of doubly exponential size. We also show that the bound on the size of the transducer is tight, and that the one-way definability problem is undecidable for (sweeping) non-functional transducers.
Cite as

Félix Baschenis, Olivier Gauwin, Anca Muscholl, and Gabriele Puppis. One-way Definability of Sweeping Transducer. In 35th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2015). Leibniz International Proceedings in Informatics (LIPIcs), Volume 45, pp. 178-191, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@InProceedings{baschenis_et_al:LIPIcs.FSTTCS.2015.178,
  author =	{Baschenis, F\'{e}lix and Gauwin, Olivier and Muscholl, Anca and Puppis, Gabriele},
  title =	{{One-way Definability of Sweeping Transducer}},
  booktitle =	{35th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2015)},
  pages =	{178--191},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-97-2},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{45},
  editor =	{Harsha, Prahladh and Ramalingam, G.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2015.178},
  URN =		{urn:nbn:de:0030-drops-56297},
  doi =		{10.4230/LIPIcs.FSTTCS.2015.178},
  annote =	{Keywords: Regular word transductions, sweeping transducers, one-way definability}
}
Document
DOI: 10.4230/LIPIcs.CONCUR.2015.72
Safety of Parametrized Asynchronous Shared-Memory Systems is Almost Always Decidable

Authors: Salvatore La Torre, Anca Muscholl, and Igor Walukiewicz

Published in: LIPIcs, Volume 42, 26th International Conference on Concurrency Theory (CONCUR 2015)

Abstract
Verification of concurrent systems is a difficult problem in general, and this is the case even more in a parametrized setting where unboundedly many concurrent components are considered. Recently, Hague proposed an architecture with a leader process and unboundedly many copies of a contributor process interacting over a shared memory for which safety properties can be effectively verified. All processes in Hague's setting are pushdown automata. Here, we extend it by considering other formal models and, as a main contribution, find very liberal conditions on the individual processes under which the safety problem is decidable: the only substantial condition we require is the effective computability of the downward closure for the class of the leader processes. Furthermore, our result allows for a hierarchical approach to constructing models of concurrent systems with decidable safety problem: networks with tree-like architecture, where each process shares a register with its children processes (and another register with its parent). Nodes in such networks can be for instance pushdown automata, Petri nets, or multi-pushdown systems with decidable reachability problem.
Cite as

Salvatore La Torre, Anca Muscholl, and Igor Walukiewicz. Safety of Parametrized Asynchronous Shared-Memory Systems is Almost Always Decidable. In 26th International Conference on Concurrency Theory (CONCUR 2015). Leibniz International Proceedings in Informatics (LIPIcs), Volume 42, pp. 72-84, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@InProceedings{latorre_et_al:LIPIcs.CONCUR.2015.72,
  author =	{La Torre, Salvatore and Muscholl, Anca and Walukiewicz, Igor},
  title =	{{Safety of Parametrized Asynchronous Shared-Memory Systems is Almost Always Decidable}},
  booktitle =	{26th International Conference on Concurrency Theory (CONCUR 2015)},
  pages =	{72--84},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-91-0},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{42},
  editor =	{Aceto, Luca and de Frutos Escrig, David},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2015.72},
  URN =		{urn:nbn:de:0030-drops-53813},
  doi =		{10.4230/LIPIcs.CONCUR.2015.72},
  annote =	{Keywords: Verification, parametrized systems, shared memory}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2014.639
Distributed Synthesis for Acyclic Architectures

Authors: Anca Muscholl and Igor Walukiewicz

Published in: LIPIcs, Volume 29, 34th International Conference on Foundation of Software Technology and Theoretical Computer Science (FSTTCS 2014)

Abstract
The distributed synthesis problem is about constructing correct distributed systems, i.e., systems that satisfy a given specification. We consider a slightly more general problem of distributed control, where the goal is to restrict the behavior of a given distributed system in order to satisfy the specification. Our systems are finite state machines that communicate via rendez-vous (Zielonka automata). We show decidability of the synthesis problem for all omega-regular local specifications, under the restriction that the communication graph of the system is acyclic. This result extends a previous decidability result for a restricted form of local reachability specifications.
Cite as

Anca Muscholl and Igor Walukiewicz. Distributed Synthesis for Acyclic Architectures. In 34th International Conference on Foundation of Software Technology and Theoretical Computer Science (FSTTCS 2014). Leibniz International Proceedings in Informatics (LIPIcs), Volume 29, pp. 639-651, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2014)

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@InProceedings{muscholl_et_al:LIPIcs.FSTTCS.2014.639,
  author =	{Muscholl, Anca and Walukiewicz, Igor},
  title =	{{Distributed Synthesis for Acyclic Architectures}},
  booktitle =	{34th International Conference on Foundation of Software Technology and Theoretical Computer Science (FSTTCS 2014)},
  pages =	{639--651},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-77-4},
  ISSN =	{1868-8969},
  year =	{2014},
  volume =	{29},
  editor =	{Raman, Venkatesh and Suresh, S. P.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2014.639},
  URN =		{urn:nbn:de:0030-drops-48772},
  doi =		{10.4230/LIPIcs.FSTTCS.2014.639},
  annote =	{Keywords: Distributed synthesis, distributed control, causal memory}
}
Document
DOI: 10.4230/LIPIcs.FSTTCS.2010.469
Verifying Recursive Active Documents with Positive Data Tree Rewriting

Authors: Blaise Genest, Anca Muscholl, and Zhilin Wu

Published in: LIPIcs, Volume 8, IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2010)

Abstract
This paper considers a tree-rewriting framework for modeling documents evolving through service calls. We focus on the automatic verification of properties of documents that may contain data from an infinite domain. We establish the boundaries of decidability: while verifying documents with recursive calls is undecidable, we obtain decidability as soon as either documents are in the positive-bounded fragment (while calls are unrestricted), or when there is a bound on the number of service calls (bounded model-checking of unrestricted documents). In the latter case, the complexity is NexpTime-complete. Our data tree-rewriting framework resembles Guarded Active XML, a platform handling XML repositories that evolve through web services. The model here captures the basic features of Guarded Active XML and extends it by node renaming and subtree deletion.
Cite as

Blaise Genest, Anca Muscholl, and Zhilin Wu. Verifying Recursive Active Documents with Positive Data Tree Rewriting. In IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2010). Leibniz International Proceedings in Informatics (LIPIcs), Volume 8, pp. 469-480, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2010)

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@InProceedings{genest_et_al:LIPIcs.FSTTCS.2010.469,
  author =	{Genest, Blaise and Muscholl, Anca and Wu, Zhilin},
  title =	{{Verifying Recursive Active Documents with Positive Data Tree Rewriting}},
  booktitle =	{IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2010)},
  pages =	{469--480},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-23-1},
  ISSN =	{1868-8969},
  year =	{2010},
  volume =	{8},
  editor =	{Lodaya, Kamal and Mahajan, Meena},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2010.469},
  URN =		{urn:nbn:de:0030-drops-28877},
  doi =		{10.4230/LIPIcs.FSTTCS.2010.469},
  annote =	{Keywords: Active documents, Guarded Active XML, verification, data trees, tree rewriting, well-structured systems.}
}
Document
DOI: 10.4230/DagSemProc.08171.1
08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data

Authors: Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu

Published in: Dagstuhl Seminar Proceedings, Volume 8171, Beyond the Finite: New Challenges in Verification and Semistructured Data (2008)

Abstract
From 20.04. to 25.04.2008, the Dagstuhl Seminar 08171 ``Beyond the Finite: New Challenges in Verification and Semistructured Data'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available.
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Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu. 08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data. In Beyond the Finite: New Challenges in Verification and Semistructured Data. Dagstuhl Seminar Proceedings, Volume 8171, pp. 1-14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)

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@InProceedings{muscholl_et_al:DagSemProc.08171.1,
  author =	{Muscholl, Anca and Ramanujam, Ramaswamy and Rusinowitch, Micha\"{e}l and Schwentick, Thomas and Vianu, Victor},
  title =	{{08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data}},
  booktitle =	{Beyond the Finite: New Challenges in Verification and Semistructured Data},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2008},
  volume =	{8171},
  editor =	{Anca Muscholl and Ramaswamy Ramanujam and Micha\"{e}l Rusinowitch and Thomas Schwentick and Victor Vianu},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08171.1},
  URN =		{urn:nbn:de:0030-drops-15606},
  doi =		{10.4230/DagSemProc.08171.1},
  annote =	{Keywords: Infinite state systems, data values, verification, semistructured data}
}
Document
DOI: 10.4230/DagSemProc.08171.2
08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data

Authors: Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu

Published in: Dagstuhl Seminar Proceedings, Volume 8171, Beyond the Finite: New Challenges in Verification and Semistructured Data (2008)

Abstract
Exploring the interaction of model checking and database static analysis techniques in the development of novel approaches to the verification of software systems handling data.
Cite as

Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu. 08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data. In Beyond the Finite: New Challenges in Verification and Semistructured Data. Dagstuhl Seminar Proceedings, Volume 8171, pp. 1-4, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)

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@InProceedings{muscholl_et_al:DagSemProc.08171.2,
  author =	{Muscholl, Anca and Ramanujam, Ramaswamy and Rusinowitch, Micha\"{e}l and Schwentick, Thomas and Vianu, Victor},
  title =	{{08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data}},
  booktitle =	{Beyond the Finite: New Challenges in Verification and Semistructured Data},
  pages =	{1--4},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2008},
  volume =	{8171},
  editor =	{Anca Muscholl and Ramaswamy Ramanujam and Micha\"{e}l Rusinowitch and Thomas Schwentick and Victor Vianu},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08171.2},
  URN =		{urn:nbn:de:0030-drops-15580},
  doi =		{10.4230/DagSemProc.08171.2},
  annote =	{Keywords: Infinite state systems, data values, verification, semistructured data}
}
Document
DOI: 10.4230/DagSemRep.292
Logic, Algebra, and Formal Verification of Concurrent Systems (Dagstuhl Seminar 00481)

Authors: Volker Diekert, Manfred Droste, Anca Muscholl, and Doron Peled

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Volker Diekert, Manfred Droste, Anca Muscholl, and Doron Peled. Logic, Algebra, and Formal Verification of Concurrent Systems (Dagstuhl Seminar 00481). Dagstuhl Seminar Report 292, pp. 1-26, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2001)

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@TechReport{diekert_et_al:DagSemRep.292,
  author =	{Diekert, Volker and Droste, Manfred and Muscholl, Anca and Peled, Doron},
  title =	{{Logic, Algebra, and Formal Verification of Concurrent Systems (Dagstuhl Seminar 00481)}},
  pages =	{1--26},
  ISSN =	{1619-0203},
  year =	{2001},
  type = 	{Dagstuhl Seminar Report},
  number =	{292},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemRep.292},
  URN =		{urn:nbn:de:0030-drops-151760},
  doi =		{10.4230/DagSemRep.292},
}
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