UFIT: A tool for modeling faults in UPPAAL timed automata

Document Type

Conference Proceeding

Publication Date



Department of Computer Science; Center for Scalable Architectures and Systems


We present the tool UFIT (Uppaal Fault Injector for Timed automata). In UFIT, we model five types of faults, namely, message loss, transient, byzantine, stuck-at, and fail-stop faults. Given the fault-free timed automata model and the selection of a type of fault, UFIT models the faults and generates the fault-affected timed automata model automatically. As a result, the designer can analyze the behavior of the model in the presence of faults. Moreover, there are several tools that extract timed automata models from higher-level programs. Hence, the designer can use UFIT to inject the faults into the extracted models.

Publication Title

NASA Formal Methods Symposium