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Unit Checking: Symbolic Model Checking for a Unit of Code

Doron Peled Department of Computer Science University of Warwick 4pm Thursday 23 January 2003 Room 2509, JCMB, King's Buildings

We present a symbolic model checking approach that allows verifying a unit of code, e.g., a single procedure or a collection of procedures that interact with each other. We allow temporal specification that asserts about both the program counters and the program variables. We decompose the verification into two parts: (1) a search that is based on the temporal behavior of the program counters, and (2) the formulation and refutation of a path condition, which inherits conditions on the program variables from the temporal specification. This verification approach is modular, as there is no requirement that all the involved procedures are provided. Furthermore, we do not require that the code is based on a finite domain. The presented approach can also be used for automating the generation of test cases for unit testing.

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