Stijn de Gouw gave a presentation of his work on deductive software verification with KeY to discover the TimSort bug at Trondheim Developer Conference 2015. The details of this work have previously been presented as a blogpost on this website and as a scientific paper at CAV 2015. The guys over at TDC2015 recorded Stijn’s presentation and put it on Vimeo, so you can now watch Stijn discuss this work.