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Polynomial-Time Alternating Probabilistic Bisimulation for Interval MDPs

  • Vahid Hashemi
  • Andrea Turrini
  • Ernst Moritz Hahn
  • Holger Hermanns
  • Khaled Elbassioni
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10606)

Abstract

Interval Markov decision processes (IMDPs) extend classical MDPs by allowing intervals to be used as transition probabilities. They provide a powerful modelling tool for probabilistic systems with an additional variation or uncertainty that relaxes the need of knowing the exact transition probabilities, which are usually difficult to get from real systems. In this paper, we discuss a notion of alternating probabilistic bisimulation to reduce the size of the IMDPs while preserving the probabilistic CTL properties it satisfies from both computational complexity and compositional reasoning perspectives. Our alternating probabilistic bisimulation stands on the competitive way of resolving the IMDP nondeterminism which in turn finds applications in the settings of the controller (parameter) synthesis for uncertain (parallel) probabilistic systems. By using the theory of linear programming, we improve the complexity of computing the bisimulation from the previously known EXPTIME to PTIME. Moreover, we show that the bisimulation for IMDPs is a congruence with respect to two facets of parallelism, namely synchronous product and interleaving. We finally demonstrate the practical effectiveness of our proposed approaches by applying them on several case studies using a prototypical tool.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Vahid Hashemi
    • 1
  • Andrea Turrini
    • 2
  • Ernst Moritz Hahn
    • 1
    • 2
  • Holger Hermanns
    • 1
  • Khaled Elbassioni
    • 3
  1. 1.Saarland UniversitySaarbrückenGermany
  2. 2.State Key Laboratory of Computer Science, ISCASBeijingChina
  3. 3.Masdar Institute of Science and TechnologyAbu DhabiUAE

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