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Verifying Collision Risk Estimation using Autonomous Driving Scenarios Derived from a Formal Model

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Abstract

Autonomous driving technology is safety-critical and thus requires thorough validation. In particular, the probabilistic algorithms employed in perception systems of autonomous vehicles (AV) are notoriously hard to validate due to the wide range of possible critical scenarios. Such critical scenarios cannot be easily addressed with current manual validation methods, thus there is a need for an automatic and formal validation technique. To this end, we propose a new approach for perception component verification that, given a high-level and human-interpretable description of a critical situation, generates relevant AV scenarios and uses them for automatic verification. To achieve this goal, we integrate two recently proposed methods for the generation and the verification that are based on formal verification tools. First, we use formal conformance test generation tools to derive, from a verified formal model, sets of scenarios to be run in a simulator. Second, we model check the traces of the simulation runs to validate the probabilistic estimation of collision risks. Using formal methods brings the combined advantages of an increased confidence in the correct representation of the chosen configuration (temporal logic verification), a guarantee of the coverage and relevance of automatically generated scenarios (conformance testing), and an automatic quantitative analysis of the test execution (verification and statistical analysis on traces).

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Code Availability

The data generated and/or analyzed during the current study are available from the corresponding authors on reasonable request. The generic parts of the LNT model [53] are available from the MARS model repository.Footnote 1

Notes

  1. http://mars-workshop.org/repository/031-AutoVehicles.html

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Funding

A part of this work was supported by the project ArchitectECA2030 that has been accepted for funding within the Electronic Components and Systems for European Leadership Joint Undertaking in collaboration with the European Union’s H2020 Framework Programme (H2020/2014-2020) and National Authorities, under grant agreement No. 877539. A part of this work was supported by the PRISSMA project, co-financed by the French Grand Défi on Trustworthy AI for Industry.

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Jean-Baptiste Horel contributed to the generation of behavior trees from test cases, the execution of behavior trees in CARLA simulator, the generation of traces of the CMCDOT, and writing the manuscript.

Philippe Ledent proposed, developed, and executed the trace verification and statistical analysis.

Lina Marsso contributed to the design of the formal LNT model, the formalization of the properties in temporal logic, the conformance test generation, the manuscript writing, and the study of related work.

Lucie Muller participated in the design of the formal LNT model, the translation from CTG to test cases to JSON files, the definition and generation of scenarios, and the experimentation on these scenarios with the description of the results in the tables.

Christian Laugier was the main initiator of this paper and supervised all the work related to autonomous vehicles, perception and collision risk evaluation through the CMCDOT algorithm, of which he is one of the authors.

Radu Mateescu contributed to the formulation of the models’ correctness properties in temporal logic and to the description of the conformance testing process.

Anshul Paigwar developed ROS-bridge to integrate CARLA sensor outputs with the CMCDOT algorithm and wrote a collision data logger for logging ground truth and predictions from CMCDOT, facilitating the generation of traces.

Alessandro Renzaglia contributed to the formulation of the problem regarding the perception and collision risk estimation modules and the definition of the properties for their assessment.

Wendelin Serwe participated in the design of the formal model, the description of the model, and the scenario extraction using conformance testing techniques.

All authors proofread the final version of the article.

Corresponding authors

Correspondence to Jean-Baptiste Horel, Philippe Ledent, Lina Marsso, Lucie Muller, Radu Mateescu, Alessandro Renzaglia or Wendelin Serwe.

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Horel, JB., Ledent, P., Marsso, L. et al. Verifying Collision Risk Estimation using Autonomous Driving Scenarios Derived from a Formal Model. J Intell Robot Syst 107, 59 (2023). https://doi.org/10.1007/s10846-023-01808-3

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