Invited Talk.- Towards Scalable Modular Checking of User-Defined Properties.- Verification Techniques.- Tressa: Claiming the Future.- Automated Verification of a Small Hypervisor.- Verification of Low-Level Code.- A Rely-Guarantee Proof System for x86-TSO.- Pervasive Verification of an OS Microkernel.- Invited Talk.- The L4.verified Project - Next Steps.- Requirements and Specifications.- An Approach of Requirements Tracing in Formal Refinement.- Dafny Meets the Verification Benchmarks Challenge.- Specifying Reusable Components.- Verification Techniques.- Reusable Verification of a Copying Collector.- To Goto Where No Statement Has Gone Before.- Invited Talk.- The Next 700 Separation Logics.- Locality in Reasoning.- Local Reasoning and Dynamic Framing for the Composite Pattern and Its Clients.- Abstraction and Refinement for Local Reasoning.