80 страниц. 2015 год. LAP Lambert Academic Publishing In this study, formal models of ATM system are described using state-based languages such as, Z, B, and Alloy as well as event-based language such as, Monterey Phoenix. Model checking is being carried out by automated tools, viz. Z/EVES, Atelier B, and Alloy Analyzer for Z, B, and Alloy specifications respectively. Furthermore, a comparative analysis of different characteristics shown by varied formal approaches has been presented. Software architecture plays an important role in the high level design of a system in terms of components, connectors, and configurations. The main building block of software architecture is an architectural style that provides domain specific design semantics. In the analysis of complex architectural style, an attempt has been made in our work to formalize one complex style e.g., C2 (component and connector) using formal specification language Alloy. For consistency checking of modeling notations, the model checker tool e.g., Alloy Analyzer is used.