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The Dynamic Fault Tree Rare Event Simulator

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Quantitative Evaluation of Systems (QEST 2020)


The dynamic-fault-tree rare event simulator, DFTRES, is a statistical model checker for dynamic fault trees (DFTs), supporting the analysis of highly dependable systems, e.g. with unavailability or unreliability under \(10^{-30}\). To efficiently estimate such low probabilities, we apply the Path-ZVA algorithm to implement Importance Sampling with minimal user input. Calculation speed is further improved by selective automata composition and bisimulation reduction. DFTRES reads DFTs in the Galileo or JANI textual formats. The tool is written in Java 11 with multi-platform support, and it is released under the GPLv3. In this paper we describe the architecture, setup, and input language of DFTRES, and showcase its accurate estimation of dependability metrics of (resilient) repairable DFTs from the FFORT benchmark suite.

This work was partially funded by NWO project 15474 (SEQUOIA).

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  • 18 December 2020

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Correspondence to Carlos E. Budde .

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Budde, C.E., Ruijters, E., Stoelinga, M. (2020). The Dynamic Fault Tree Rare Event Simulator. In: Gribaudo, M., Jansen, D.N., Remke, A. (eds) Quantitative Evaluation of Systems. QEST 2020. Lecture Notes in Computer Science(), vol 12289. Springer, Cham.

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