Ruby Extension Library Verified using Coq Proof-assistant Tanaka Akira National Institute of Advanced Industrial Science and Technology (AIST) RubyKaigi 2017 2017-09-20 2 About This Talk • Formal verification for fast & safe program in C • Quality assurance other than test 3 Materials • Ruby • Coq • C • HTML escape • Intel SSE Do you know all of them? 4 Coq Proof-assistant • Proof assistant – Prog