First Advisor

Richard Hamlet

Date of Publication

8-6-1993

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Computer Science

Department

Computer Science

Language

English

Subjects

Computer programs -- Testing, Computer programming, Computer algorithms

DOI

10.15760/etd.6572

Physical Description

1 online resource (2, vi, 62 p.)

Abstract

Symbolic execution is a powerful technique used to perform various activities such as program testing, formal verification of programs, etc. However, symbolic execution does not deal with indexed variables in an adequate manner. Integration of indexed variables such as arrays into symbolic execution would increase the generality of this technique. We present an original substitution technique that produces array-term-free constraints as a counterargument to the commonly accepted belief that symbolic execution cannot handle arrays. The substitution technique deals with constraints involving array terms with a single aggregate name, array terms with multiple aggregate names, and nested array terms. Our approach to solving constraints involving array terms is based on the analysis of the relationship between the array subscripts. Dataflow dependence analysis of programs involving indexed variables suffers from problems of undecidability. We propose a separation technique in which the array subscript constraints are separated from the loop path constraints. The separation technique suggests that the problem of establishing data dependencies is not as hard as the general loop problem. In this respect, we present a new general heuristic program analysis technique which is used to preserve the properties of the relations between program variables.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Comments

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL

Persistent Identifier

https://archives.pdx.edu/ds/psu/27323

Download

Share

COinS