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Selective Monitoring

Grigore, Radu, Kiefer, Stefan (2018) Selective Monitoring. In: Leibniz International Proceedings in Informatics. 20. LIPICS, Germany (doi:10.4230/LIPIcs.CONCUR.2018.20)


We study selective monitors for labelled Markov chains. Monitors observe the outputs that are generated by a Markov chain during its run, with the goal of identifying runs as correct or faulty. A monitor is selective if it skips observations in order to reduce monitoring overhead. We are interested in monitors that minimize the expected number of observations. We establish an undecidability result for selectively monitoring general Markov chains. On the other hand, we show for non-hidden Markov chains (where any output identifies the state the Markov chain is in) that simple optimal monitors exist and can be computed efficiently, based on DFA language equivalence. These monitors do not depend on the precise transition probabilities in the Markov chain. We report on experiments where we compute these monitors for several open-source Java projects.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.4230/LIPIcs.CONCUR.2018.20
Uncontrolled keywords: runtime monitoring, probabilistic systems, Markov chains, automata, language equivalence
Divisions: Faculties > Sciences > School of Computing > Programming Languages and Systems Group
Depositing User: Radu Grigore
Date Deposited: 02 Jul 2018 13:50 UTC
Last Modified: 09 Jul 2019 11:24 UTC
Resource URI: (The current URI for this page, for reference purposes)
Grigore, Radu:
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