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An Efficient Algorithm for Computing Causal Trace Sets in Causality Checking

  • Martin KölblEmail author
  • Stefan LeueEmail author
Conference paper
First Online:
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11781)

Abstract

Causality Checking [LL13a] has been proposed as a finite state space exploration technique which computes ordered sequences of events that are considered to cause the violation of a reachability property. A crucial point in the implementation of Causality Checking is the computation and storage of all minimal counterexamples found during state space exploration. We refer to the set of all minimal counterexamples as a causal trace set. However, the Duplicate State Prefix Matching (DSPM) Algorithm that is currently used in Causality Checking only under-approximates the causal trace set. As we argue, without the approximation the DSPM algorithm is inefficient. We propose the, to the best of our knowledge, first efficient algorithm that precisely computes a causal trace set, avoiding approximation, called Causal Trace Backward Search (CTBS). We compare the DSPM and CTBS algorithms with respect to their worst case complexities, and by applying them to several case studies.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.University of KonstanzKonstanzGermany

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