Integrating Tools: Co-simulation in UPPAAL Using FMI-FMU

Abstract

While standalone tools for verification and modeling have proven useful, their chosen formalism and description-language can at times be restrictive. We demonstrate how to use UPPAAL SMC to analyze controller systems consisting of Function Mockup Units (FMU) modeled in other tools, such as Matlab and Modelica. Apart from supporting FMI-FMU modules the newly added C interface can call any external function. The only requirement for sound analysis is statelessness and determinism of the external function. We demonstrate the expressive power by implementing the FMI-FMU master algorithm as a timed automata, interfacing with external, non-native and non-trivial Function Mockup Units (FMU). We also model two components in UPPAAL SMC exporting one of them as an FMU while keeping the other as a native component. Furthermore we demonstrate the first simulation environment for the Function Mockup Units, capable of checking bounded MITL properties.

Reconciling interoperability with efficient Verification and Validation within open source simulation environments

“…The Functional Mock-up Interface (FMI) is a widely used standard for model-based design and analysis of Cyber-Physical Systems (CPSs). In the literature we find many examples in different fields (see, e.g., [46,47,48,49]). Both Co-Simulation (CS) and Model Exchange (ME) paradigms are crucial to handle large-scale systems (see, e.g., [50,51]).…”

Analysis of Source Code Using UPPAAL

“…In this paper we present our initial work to bridge the gap from automata-based UPPAAL models to source-code analysis. We do this by interfacing LLVM-programs with UPPAAL using UPPAALs extendibility through dynamic link libraries [5,13]. In the dynamic link library resides an interpreter communicating with UPPAAL in regards to what happens with the discrete state-space while UPPAAL manages the exploration algorithms and timed aspects of the state space.…”