Efficient path conditions in dependence graphs

  • Authors:
  • Torsten Robschink;Gregor Snelting

  • Affiliations:
  • Universität Passau Lehrstuhl für Software-Systeme Germany;Universität Passau Lehrstuhl für Software-Systeme Germany

  • Venue:
  • Proceedings of the 24th International Conference on Software Engineering
  • Year:
  • 2002

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Abstract

Program slicing combined with constraint solving is a powerful tool for software analysis. Path conditions are generated for a slice or chop, which --- when solved for the input variables --- deliver compact "witnesses" for dependences or illegal influences between program points.In this contribution we show how to make path conditions work for large programs. Aggressive engineering, based on interval analysis and BDDs, is shown to overcome the potential combinatoric explosion. Case studies and empirical data will demonstrate the usefulness of path conditions for practical program analysis.