Formal Methods in Agda

Agda formalization for operational semantics of a simple imperative language, type-based information flow security, Hoare logic, verification conditions, and separation logic.

Files structure

• IMP: syntax of the IMP language; evaluation of expressions and substitution lemma.
• OperationalSemantics: small-step and big-step semantics for IMP; determinism, program equivalence, equivalence between the two semantics.
• Security: security type system for IMP; non-interference, anti-monotonicity, confinement lemma.
• Types: type system for IMP; preservation, progress, type soundness.
• HoareLogic: Hoare logic; syntax, weakest preconditions, completeness and soundness.
• SeparationLogic: separation logic; frame lemmas.