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Eliminating Message Counters in Synchronous Threshold Automata

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Verification, Model Checking, and Abstract Interpretation (VMCAI 2021)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 12597))

Abstract

In previous work, we introduced synchronous threshold automata for the verification of synchronous fault-tolerant distributed algorithms, and presented a verification method based on bounded model checking. Modeling a distributed algorithm by a threshold automaton requires to correctly deal with the semantics for sending and receiving messages based on the fault assumption. This step was done manually so far, and required human ingenuity. Motivated by similar results for asynchronous threshold automata, in this paper we show that one can start from a faithful model of the distributed algorithm that includes the sending and receiving of messages, and then automatically obtain a threshold automaton by applying quantifier elimination on the receive message counters. In this way, we obtain a fully automated verification pipeline. We present an experimental evaluation, discovering a bug in our previous manual encoding. Interestingly, while quantifier elimination in general produces larger threshold automata than the manual encoding, the verification times are comparable and even faster in several cases, allowing us to verify benchmarks that could not be handled before.

Partially supported by: Interchain Foundation, Switzerland; Austrian Science Fund (FWF) via doctoral college LogiCS W1255.

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Authors and Affiliations

  1. TU Wien, Vienna, Austria

    Ilina Stoilkovska & Florian Zuleger

  2. Informal Systems, Vienna, Austria

    Ilina Stoilkovska, Igor Konnov & Josef Widder

Authors
  1. Ilina Stoilkovska
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  2. Igor Konnov
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  3. Josef Widder
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  4. Florian Zuleger
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Corresponding author

Correspondence to Ilina Stoilkovska .

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Editors and Affiliations

  1. University of Copenhagen, Copenhagen, Denmark

    Fritz Henglein

  2. Tel Aviv University, Tel Aviv, Israel

    Sharon Shoham

  3. Technion, Haifa, Israel

    Yakir Vizel

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Stoilkovska, I., Konnov, I., Widder, J., Zuleger, F. (2021). Eliminating Message Counters in Synchronous Threshold Automata. In: Henglein, F., Shoham, S., Vizel, Y. (eds) Verification, Model Checking, and Abstract Interpretation. VMCAI 2021. Lecture Notes in Computer Science(), vol 12597. Springer, Cham. https://doi.org/10.1007/978-3-030-67067-2_10

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  • DOI: https://doi.org/10.1007/978-3-030-67067-2_10

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