If At First You Don't Succeed: Extended Monitorability through Multiple Executions

06/08/2023

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by   Antonis Achilleos, et al.

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This paper investigates the observational capabilities of monitors that can observe a system over multiple runs. We study how the augmented monitoring setup affect the class of properties that can be verified at runtime, focussing on branching-time properties expressed in the modal mu-calculus. Our results show that the setup can be used to systematically extend previously established monitorability limits. We also prove bounds that capture the correspondence between the syntactic structure of a branching-time property and the number of system runs required to conduct the verification.