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Propositional Dynamic Logic for Hyperproperties

Authors Jens Oliver Gutsfeld, Markus Müller-Olm, Christoph Ohrem



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Author Details

Jens Oliver Gutsfeld
  • Institut für Informatik, Westfälische Wilhelms-Universität Münster, Germany
Markus Müller-Olm
  • Institut für Informatik, Westfälische Wilhelms-Universität Münster, Germany
Christoph Ohrem
  • Institut für Informatik, Westfälische Wilhelms-Universität Münster, Germany

Acknowledgements

We thank the reviewers for their helpful comments.

Cite AsGet BibTex

Jens Oliver Gutsfeld, Markus Müller-Olm, and Christoph Ohrem. Propositional Dynamic Logic for Hyperproperties. In 31st International Conference on Concurrency Theory (CONCUR 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 171, pp. 50:1-50:22, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2020)
https://doi.org/10.4230/LIPIcs.CONCUR.2020.50

Abstract

Information security properties of reactive systems like non-interference often require relating different executions of the system to each other and following them simultaneously. Such hyperproperties can also be useful in other contexts, e.g., when analysing properties of distributed systems like linearizability. Since common logics like LTL, CTL, or the modal μ-calculus cannot express hyperproperties, the hyperlogics HyperLTL and HyperCTL^* were developed to cure this defect. However, these logics are not able to express arbitrary ω-regular properties. In this paper, we introduce HyperPDL-Δ, an adaptation of the Propositional Dynamic Logic of Fischer and Ladner for hyperproperties, in order to remove this limitation. Using an elegant automata-theoretic framework, we show that HyperPDL-Δ model checking is asymptotically not more expensive than HyperCTL^* model checking, despite its vastly increased expressive power. We further investigate fragments of HyperPDL-Δ with regard to satisfiability checking.

Subject Classification

ACM Subject Classification
  • Theory of computation → Modal and temporal logics
  • Theory of computation → Verification by model checking
  • Theory of computation → Logic and verification
  • Theory of computation → Automata over infinite objects
Keywords
  • Hyperlogics
  • Hyperproperties
  • Model Checking
  • Automata

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References

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