Empowering End Users in Debugging Trigger-Action Rules Fulvio Corno Politecnico di Torino Torino, Italy fulvio.corno@polito.it Luigi De Russis Politecnico di Torino Torino, Italy luigi.derussis@polito.it Alberto Monge Roffarello Politecnico di Torino Torino, Italy alberto.monge@polito.it ABSTRACT End users can program trigger-action rules to personalize the joint behavior of their smart devices an