Verification of tree-processing programs via higher-order model checking

  • Authors:
  • Hiroshi Unno;Naoshi Tabuchi;Naoki Kobayashi

  • Affiliations:
  • Tohoku University;Tohoku University;Tohoku University

  • Venue:
  • APLAS'10 Proceedings of the 8th Asian conference on Programming languages and systems
  • Year:
  • 2010

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Abstract

We propose a new method to verify that a higher-order, tree-processing functional program conforms to an input/output specification. Our method reduces the verification problem to multiple verification problems for higher-order multi-tree transducers, which are then transformed into higher-order recursion schemes and model-checked. Unlike previous methods, our new method can deal with arbitrary higher-order functional programs manipulating algebraic data structures, as long as certain invariants on intermediate data structures are provided by a programmer. We have proved the soundness of the method and implemented a prototype verifier.