Machine-checked executable semantics of Stateflow

Machine-checked executable semantics of Stateflow

Simulink is a widely used model-based development environment for embedded systems. Stateflow is a component of Simulink for modeling event-driven control via hierarchical state machines and flow charts. However, Stateflow lacks an official formal semantics, making it difficult to formally prove pro...

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Veröffentlicht in:arXiv.org 2022-07
Hauptverfasser: Yi, Shicheng, Wang, Shuling, Zhan, Bohua, Zhan, Naijun
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Control charts
Flow charts
Safety critical
Semantics
Software development tools
State machines
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Zhan, Bohua
Zhan, Naijun
description Simulink is a widely used model-based development environment for embedded systems. Stateflow is a component of Simulink for modeling event-driven control via hierarchical state machines and flow charts. However, Stateflow lacks an official formal semantics, making it difficult to formally prove properties of its models in safety-critical applications. In this paper, we define a formal semantics for a large subset of Stateflow, covering complex features such as hierarchical states and transitions, event broadcasts, early return, temporal operators, and so on. The semantics is formalized in Isabelle/HOL and proved to be deterministic. We implement a tactic for automatic execution of the semantics in Isabelle, as well as a translator in Python transforming Stateflow models to the syntax in Isabelle. Using these tools, we validate the semantics against a collection of examples illustrating the features we cover.
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subjects Control charts
Flow charts
Safety critical
Semantics
Software development tools
State machines
title Machine-checked executable semantics of Stateflow
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