Interactive verification of communication software on the basis of CIL

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Abstract
The CIL-approach for the development of communication services is based on the programming language CIL (Communication Service Implementation Language) and a CIL-compatible theory of program execution. The theory contains a first-order predicate calculus and an event-oriented model of program execution. The verification of programs written in CIL is supported by the automated generation of program axioms and by an interactive theorem prover tailored to the predicate calculus. Interactive verification during the design phase leads to early detection and localization of design errors and helps to reduce the efforts for debugging and testing. The paper describes the principles of the language, the theory, and the interactive verification tool. The design of a program realizing a transport service exemplifies the CIL-approach.

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