Abstract
One of the major drawbacks for the use of formal methods is the excessive size of the state-spaces representing behaviours of industrial-sized specifications of concrete systems. Existing verification algorithms simply are often not applicable to the large systems of practical relevance. One can improve the applicability of verification methods by orders of magnitude by ignoring parts of a behaviour which contain no information with respect to a given verification task. We focus on exactly such an abstraction based way of dealing with large, so called industrial-sized systems and discuss its application in an industrial project aiming at the detection of service interactions in Intelligent Networks on the specification level. The concrete application of the abstraction and verification method is presented mainly by considering an example taken from the service interaction project.
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