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Does Your Result Checker Really Check?

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Summary
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This study validates result checkers, which ensure software reliability, using formal methods. A case study found a logical error in a max flow algorithm

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Area of Science:

  • Computer Science
  • Software Engineering
  • Formal Methods

Background:

  • Result checkers ensure software correctness but are difficult to construct.
  • The result checking paradigm offers a powerful approach to software reliability.

Purpose of the Study:

  • To present experiences in validating result checkers using formal methods.
  • To investigate the reliability of result checkers in commercial software systems.

Main Methods:

  • Formal methods were employed to validate result checkers.
  • Case studies were conducted on result checkers from the LEDA system.

Main Results:

  • Formal methods successfully identified a logical error in a max flow algorithm's result checker.
  • Validation of result checkers from the LEDA system was performed.

Conclusions:

  • Formal methods are effective for detecting errors in result checkers.
  • The reliability of software components like result checkers can be enhanced through rigorous validation.