Reactive and Proactive Diagnosis of Distributed Systems Using Net Unfoldings

We present a diagnosis algorithm for distributed systems modeled as products of transition systems, a model very close to Petri nets. Following the seminal work of Benveniste, Fabre, Haar, and Jard, our algorithm palliates the state-explosion problem by means of the unfolding technique. Given an obs...

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Bibliographic Details
Published in2012 12th International Conference on Application of Concurrency to System Design pp. 154 - 163
Main Authors Esparza, J., Kern, C.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2012
Subjects
Concurrent computing
diagnosis
Labeling
Observers
partial order semantics
Petri net
Petri nets
SAT solving
Sensor systems
Synchronization
unfolding
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Summary:We present a diagnosis algorithm for distributed systems modeled as products of transition systems, a model very close to Petri nets. Following the seminal work of Benveniste, Fabre, Haar, and Jard, our algorithm palliates the state-explosion problem by means of the unfolding technique. Given an observation (partial information about a firing sequence), the algorithm constructs a prefix of the unfolding, a compact representation of the executions of the system compatible with the observation. Since the computations of this prefix is algorithmically involved, we define an over approximation that trades precision for speed. We report on an implementation that constructs the prefix when the sequence of observations is known (reactive), but also present an online approach, where the diagnosis proactively looks into the future and compare these two approaches. Moreover, we present SAT solving methods for analyzing the explanation.
ISBN:9781467316873
1467316873
ISSN:1550-4808
2374-8567
DOI:10.1109/ACSD.2012.19