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Drossopoulou, Sophia ; Francalanza, Adrian ; Müller, P. ; Summers, Alexander J.

A Unified Framework for Verification Techniques for Object Invariants

08061.DrossopoulouSophia.Paper.1427.pdf (0.4 MB)


Object invariants define the consistency of objects. They have subtle semantics, mainly because of call-backs, multi-object invariants, and subclassing. Several verification techniques for object invariants have been proposed. It is difficult to compare these techniques, and to ascertain their soundness, because of their differences in restrictions on programs and invariants, in the use of advanced type systems (e.g., ownership types), in the meaning of invariants, and in proof obligations. We develop a unified framework for such techniques. We distil seven parameters that characterise a verification technique, and identify sufficient conditions on these parameters which guarantee soundness. We instantiate our framework with three verification techniques from the literature, and use it to assess soundness and compare expressiveness.

BibTeX - Entry

  author =	{Sophia Drossopoulou and Adrian Francalanza and P. M{\"u}ller and Alexander J. Summers},
  title =	{A Unified Framework for  Verification Techniques for Object Invariants},
  booktitle =	{Types, Logics and Semantics for State},
  year =	{2008},
  editor =	{Amal Ahmed and Nick Benton and Martin Hofmann and Greg Morrisett},
  number =	{08061},
  series =	{Dagstuhl Seminar Proceedings},
  ISSN =	{1862-4405},
  publisher =	{Internationales Begegnungs- und Forschungszentrum f{\"u}r Informatik (IBFI), Schloss Dagstuhl, Germany},
  address =	{Dagstuhl, Germany},
  URL =		{},
  annote =	{Keywords: Object invariants, visible states semantics, verification, sound}

Keywords: Object invariants, visible states semantics, verification, sound
Collection: 08061 - Types, Logics and Semantics for State
Issue Date: 2008
Date of publication: 15.04.2008

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