Safety verification of Ada95 programs using software fault trees

Abstract

Software fault tree is a graphical analysis technique that is based on the concept of axiomatic verification. A template-based approach to software fault tree analysis was proposed for Ada83 programs. For the past years since this approach, no noticeable extensions or revisions on the template-based software fault tree analysis have been proposed while the target language has been evolved into Ada95. In this paper, we examine the validness of the original Ada83 analysis templates to determine which of them are still applicable to Ada95 programs considering major changes from Ada83 to Ada95. In addition, we propose newly required templates as well as the necessary modification of the original Ada83 templates in order to cope with the changes. We demonstrate the use of our proposed templates with an example program.