Proofs from tests

  • Authors:
  • Nels E. Beckman;Aditya V. Nori;Sriram K. Rajamani;Robert J. Simmons

  • Affiliations:
  • Carnegie Melon University, Pittsburgh, PA, USA;Microsoft Research India, Bangalore, India;Microsoft Research India, Bangalore, India;Carnegie Mellon University, Pittsburgh, PA, USA

  • Venue:
  • ISSTA '08 Proceedings of the 2008 international symposium on Software testing and analysis
  • Year:
  • 2008

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Abstract

We present an algorithm DASH to check if a program P satisfies a safety property phi. The unique feature of the algorithm is that it uses only test generation operations, and it refines and maintains a sound program abstraction as a consequence of failed test generation operations. Thus, each iteration of the algorithm is inexpensive, and can be implemented without any global may-alias information. In particular, we introduce a new refinement operator WP_alpha that uses only the alias information obtained by executing a test to refine abstractions in a sound manner. We present a full exposition of the Dash algorithm, its theoretical properties, and its implementation.