Concurrent Stochastic Lossy Channel Games

Authors Daniel Stan , Muhammad Najib , Anthony Widjaja Lin , Parosh Aziz Abdulla

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Author Details

Daniel Stan
  • EPITA, Le Kremlin-Bicêtre, France
Muhammad Najib
  • Heriot-Watt University, Edinburgh, UK
Anthony Widjaja Lin
  • University of Kaiserslautern-Landau, Germany
  • Max-Planck Institute for Software Systems, Kaiserslautern, Germany
Parosh Aziz Abdulla
  • Uppsala University, Sweden


We wish to thank Richard Mayr and all anonymous reviewers for their useful feedback.

Cite AsGet BibTex

Daniel Stan, Muhammad Najib, Anthony Widjaja Lin, and Parosh Aziz Abdulla. Concurrent Stochastic Lossy Channel Games. In 32nd EACSL Annual Conference on Computer Science Logic (CSL 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 288, pp. 46:1-46:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024)


Concurrent stochastic games are an important formalism for the rational verification of probabilistic multi-agent systems, which involves verifying whether a temporal logic property is satisfied in some or all game-theoretic equilibria of such systems. In this work, we study the rational verification of probabilistic multi-agent systems where agents can cooperate by communicating over unbounded lossy channels. To model such systems, we present concurrent stochastic lossy channel games (CSLCG) and employ an equilibrium concept from cooperative game theory known as the core, which is the most fundamental and widely studied cooperative equilibrium concept. Our main contribution is twofold. First, we show that the rational verification problem is undecidable for systems whose agents have almost-sure LTL objectives. Second, we provide a decidable fragment of such a class of objectives that subsumes almost-sure reachability and safety. Our techniques involve reductions to solving infinite-state zero-sum games with conjunctions of qualitative objectives. To the best of our knowledge, our result represents the first decidability result on the rational verification of stochastic multi-agent systems on infinite arenas.

Subject Classification

ACM Subject Classification
  • Theory of computation → Formal languages and automata theory
  • Theory of computation → Verification by model checking
  • Theory of computation → Concurrency
  • Theory of computation → Solution concepts in game theory
  • concurrent
  • games
  • stochastic
  • lossy channels
  • wqo
  • finite attractor property
  • cooperative
  • core
  • Nash equilibrium


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