Generating Trace-Sets for Model-based Testing,

18th IEEE International Symposium on Software Reliability Engineering (ISSRE 2007), pages 171-180, November 2007, Trollhattan, Sweden.

Birgitta Lindstrom, Paul Pettersson and Jeff Offutt.

Abstract

Model-checkers are powerful tools that can find individual traces through models to satisfy desired properties. These traces provide solutions to a number of problems. Instead of individual traces, software testing needs sets of traces that satisfy coverage criteria. Finding a trace set in a large model is difficult because model checkers generate single traces and use a lot of memory. Space and time requirements of modelchecking algorithms grow exponentially with respect to the number of variables and parallel automata of the model being analyzed. We present a method that generates a set of traces by iteratively invoking a model checker. The method mitigates the memory consumption problem by dynamically building partitions along the traces. This method was applied to a testability case study, and it generated the complete trace set, while ordinary model-checking could only generate 26%.



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