Learning component interfaces with may and must abstractions

• Authors: Rishabh Singh;Dimitra Giannakopoulou;Corina Păsăreanu
• Venue: CAV'10 Proceedings of the 22nd international conference on Computer Aided Verification
• Year: 2010

Component interfaces are the essence of modular program analysis In this work, a component interface documents correct sequences of invocations to the component's public methods We present an automated framework that extracts finite safe, permissive, and minimal interfaces, from potentially infinite software components Our proposed framework uses the L* automata-learning algorithm to learn finite interfaces for an infinite-state component It is based on the observation that an interface permissive with respect to the component's must abstraction and safe with respect to its may abstraction provides a precise characterization of the legal invocations to the methods of the concrete component The abstractions are refined automatically from counterexamples obtained during the reachability checks performed by our framework The use of must abstractions enables us to avoid an exponentially expensive determinization step that is required when working with may abstractions only, and the use of L* guarantees minimality of the generated interface We have implemented the algorithm in the ARMC tool and report on its application to a number of case studies including several Java2SDK and J2SEE library classes as well as to NASA flight-software components.