Verification of object-oriented programs: A transformational approach

Krzysztof R. Apt, Frank S. de Boer, Ernst-Rüdiger Olderog, Stijn de Gouw

Research output: Contribution to journalArticleAcademicpeer-review


We show that verification of object-oriented programs by means of the assertional method can be achieved in a simple way by exploiting a syntax-directed transformation from object-oriented programs to recursive programs. This transformation suggests natural proofs rules and its correctness helps us to establish soundness and relative completeness of the proposed proof system. One of the difficulties is how to properly deal in the assertion language with the instance variables and aliasing. The discussed programming language supports arrays, instance variables, failures and recursive methods with parameters. We also explain how the transformational approach can be extended to deal with other features of object-oriented programming, like classes, inheritance, subtyping and dynamic binding.
Original languageEnglish
Pages (from-to)823-852
Number of pages30
JournalJournal of Computer and System Sciences
Issue number3
Publication statusPublished - May 2012
Externally publishedYes


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