Intelligent Systems and Formal Methods in Software Engineering Bernhard Beckert, Tony Hoare, Reiner Hähnle, Douglas R. Smith, Cordell Green, Silvio Ranise, Cesare Tinelli, Thomas Ball and Sriram K. Rajamani Formal methods in software engineering are an increasingly important application area for intelligent systems. The field has outgrown the area of academic case studies, and industry is showing serious interest. This installment of Trends & Controversies looks at the state of the art in formal methods and discusses the developments that make successful applications possible.