A version of this technical report appears in the 18th International
Conference on Software Engineering (ICSE '18), March 1996. Copies of 
the paper are available via the web at:

	http://www.cs.washington.edu/homes/notkin/pubs/icse18-cg.html

or by request to either:

        Gail Murphy
        Department of Computer Science and Engineering
        University of Washington
        Box 352350
        Seattle, WA 98195-2350 USA  
        (Voice):  1.206.616.1847
        (Fax):    1.206.543.2969
        (E-mail): gmurphy@cs.washington.edu

or:

        David Notkin
        Department of Computer Science and Engineering
        University of Washington
        Box 352350
        Seattle, WA 98195-2350 USA  
        (Voice):  1.206.685.3798
        (Fax):    1.206.543.2969
        (E-mail): notkin@cs.washington.edu