Unified Modeling Language (UML) is considered a standard for modeling object-oriented software. It supports several different diar grams that can be used to model behavior and structure of the software. With respect to formal verification, particularly Model Checking, the existing approaches are usually restricted to a single UML diagram. This paper presents a tool to convert UML behavioral diagrams (sequence, activity, and state machine) into Transition Systems to support software Model Checking. A peculiar feature of our tool is that it is developed as part of a larger effort to allow Model Checking of software built in accordance with UML, including several UML behavioral diagrams. We demonstrate the effectiveness of our approach by applying it to a classic case study and also to a real case study (embedded software) in the space domain.
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