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arXiv · 2507.11126

Execution and monitoring of HOA automata with HOAX

Luca Di Stefano
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Abstract

We present a tool called Hoax for the execution of {\omega}-automata expressed in the popular HOA format. The tool leverages the notion of trap sets to enable runtime monitoring of any (non-parity) acceptance condition supported by the format. When the automaton is not monitorable, the tool may still be able to recognise so-called ugly prefixes, and determine that no further observation will ever lead to a conclusive verdict. The tool is open-source and highly configurable. We present its formal foundations, its design, and compare it against the trace analyser PyContract on a lock acquisition scenario.

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Luca Di Stefano. 2025-07-15. Execution and monitoring of HOA automata with HOAX. https://doi.org/10.1007/978-3-032-05435-7_3

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