Isabelle/HOL: The proof assistant behind the Nitro Isolation Engine

Jul 10, 2026

Amazon Science highlights Isabelle/HOL as the proof assistant that enabled the world's first formally verified cloud hypervisor, the Nitro Isolation Engine. The tool's balance of expressiveness, automation, and scalability was key to this achievement.

Why it matters: This marks a significant milestone in cloud security, demonstrating that formal verification can be applied to critical infrastructure at scale.

Full story at: Amazon Science ↗