This bookconstitutes the refereed proceedings of the 12th International Conference on IntegratedFormal Methods, IFM 2016, held in Reykjavik, Iceland, in June 2016.
The 33 paperspresented in this volume were carefully reviewed and selected from 99submissions. They were organized in topical sections named: invitedcontributions; program verification; probabilistic systems; concurrency; safetyand liveness; model learning; SAT and SMT solving; testing; theorem proving andconstraint satisfaction; case studies.