Developing cryptographic protocols that are free from vulnerabilities is very challenging, as evidenced by numerous design flaws and implementation bugs in widely used protocols. Recent work has leveraged model checking to generate negative test cases, that is test cases that include the behavior of Dolev-Yao attacker. In this paper, we address the problem of analyzing execution traces produced by testing protocol implementations with such negative test cases. We propose a method for detecting violations of security properties by model-checking execution traces. Our approach employs a model checker based on DLTL, a Linear Temporal Logic with freeze operators, and supports automation of the testing process through pre- and post-processing steps. These steps, respectively, bridge the gap between different levels of abstraction and synthesize the results produced by the model checker.We present experimental results as a proof of concept for the feasibility of the proposed method.

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