Run time monitoring of reactive system models

: In model-based development of reactive systems, statecharts are widely used for formal design of system behavior, and provide a sound basis for analysis and verification tools, as well as for code generation from system models. We present an approach for dynamic analysis of reactive systems via run-time verification of code produced with Statemate C and MicroC code generators [10], [15]. The core of the approach is automatic creation of monitoring statecharts from formulas that specify the system's behavioral properties in a proposed assertion language. Such monitors are then translated into code together with the system model, and executed concurrently with the system code. This approach leads to a more realistic analysis of reactive systems, as monitoring is supported in the system's actual operating environment. For models that include design-level attributes (division into tasks, etc.), this is crucial for performance-related checks, and helps to overcome restrictions inherent in simulation and model checking.