mentation of the Abstraction Method In Coq Eelis van der Weegen Institute for Computing and Information Sciences Raboud University Nijmegen This technical report documents our development of a hybrid afety prover, implemented in Coq using the abstraction method introduced by Alur in [1]. The development includes: a formalization of the structure of hybrid systems; a systematic approach and generic set rt utilities for the construction of an abstract system (consisting of decidable “overestimators” of abstract transitions and initiality) faithpresenting a (concrete) hybrid system; a translation of abstract to graphs enabling decision of abstract state reachability using a certified graph reachability algorithm; a proof of an example hybrid system (taken from [1]) generated using this tool stack. The development critically relies on the computable real number implementation part of the C-CoRN library of formalized constructive mathematics. 1 1 This research was supported by the BRIC...