### Abstract

Original language | English |
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Title of host publication | Proceedings of the 11th Workshop on Quantitative Aspects of Programming Languages and Systems (QAPL 2013) |

Place of Publication | Trieste |

Publisher | University of Trieste |

Pages | 19 |

Number of pages | 4 |

Publication status | Published - Mar 2013 |

Event | 11th International Workshop on Quantitative Aspects of Programming Languages and Systems, QAPL 2013 - Rome, Italy Duration: 23 Mar 2013 → 24 Mar 2013 Conference number: 11 http://eptcs.web.cse.unsw.edu.au/content.cgi?QAPL2013 |

### Publication series

Name | |
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Publisher | University of Trieste |

### Workshop

Workshop | 11th International Workshop on Quantitative Aspects of Programming Languages and Systems, QAPL 2013 |
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Abbreviated title | QAPL 2013 |

Country | Italy |

City | Rome |

Period | 23/03/13 → 24/03/13 |

Internet address |

### Fingerprint

### Keywords

- EC Grant Agreement nr.: FP7/295261
- EC Grant Agreement nr.: FP7/2007-2013
- EC Grant Agreement nr.: FP7/318490

### Cite this

*Proceedings of the 11th Workshop on Quantitative Aspects of Programming Languages and Systems (QAPL 2013)*(pp. 19). Trieste: University of Trieste.

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*Proceedings of the 11th Workshop on Quantitative Aspects of Programming Languages and Systems (QAPL 2013).*University of Trieste, Trieste, pp. 19, 11th International Workshop on Quantitative Aspects of Programming Languages and Systems, QAPL 2013, Rome, Italy, 23/03/13.

**On-the-fly confluence detection for statistical model checking.** / Hartmanns, Arnd; Timmer, Mark.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

TY - GEN

T1 - On-the-fly confluence detection for statistical model checking

AU - Hartmanns, Arnd

AU - Timmer, Mark

PY - 2013/3

Y1 - 2013/3

N2 - Statistical model checking is an analysis method that circumvents the state space explosion problem in model-based verification by combining probabilistic simulation with statistical methods that provide clear error bounds. As a simulation-based technique, it can only provide sound results if the underlying model is a stochastic process. In verification, however, models are usually variations of nondeterministic transition systems. The notion of confluence allows the reduction of such transition systems in classical model checking by removing spurious nondeterministic choices. In this presentation, we show that confluence can be adapted to detect and discard such choices on-the-fly during simulation, thus extending the applicability of statistical model checking to a subclass of Markov decision processes. In contrast to previous approaches that use partial order reduction, the confluence-based technique can handle additional kinds of nondeterminism. In particular, it is not restricted to interleavings. We evaluate our approach, which is implemented as part of the modes simulator for the MODEST modelling language, on a set of examples that highlight its strengths and limitations and show the improvements compared to the partial order-based method.

AB - Statistical model checking is an analysis method that circumvents the state space explosion problem in model-based verification by combining probabilistic simulation with statistical methods that provide clear error bounds. As a simulation-based technique, it can only provide sound results if the underlying model is a stochastic process. In verification, however, models are usually variations of nondeterministic transition systems. The notion of confluence allows the reduction of such transition systems in classical model checking by removing spurious nondeterministic choices. In this presentation, we show that confluence can be adapted to detect and discard such choices on-the-fly during simulation, thus extending the applicability of statistical model checking to a subclass of Markov decision processes. In contrast to previous approaches that use partial order reduction, the confluence-based technique can handle additional kinds of nondeterminism. In particular, it is not restricted to interleavings. We evaluate our approach, which is implemented as part of the modes simulator for the MODEST modelling language, on a set of examples that highlight its strengths and limitations and show the improvements compared to the partial order-based method.

KW - EC Grant Agreement nr.: FP7/295261

KW - EC Grant Agreement nr.: FP7/2007-2013

KW - EC Grant Agreement nr.: FP7/318490

M3 - Conference contribution

SP - 19

BT - Proceedings of the 11th Workshop on Quantitative Aspects of Programming Languages and Systems (QAPL 2013)

PB - University of Trieste

CY - Trieste

ER -