IRep2: ESBMC's Internal Representation

irep2 is ESBMC’s typed, reference-counted, copy-on-write internal representation for expressions (expr2t) and types (type2t). It is the data structure every frontend lowers to, every transformation rewrites, and every backend (symex, SMT, goto2c) consumes. It replaces the older “stringy” irept for the verification pipeline; conversions live in util/migrate.{h,cpp}.

For the full documentation — design rationale, file layout, anatomy of a node, how to add a new node, gotchas, and a reference of every type and expression kind — see the README maintained alongside the source:

src/irep2/README.md on GitHub

The source itself lives at src/irep2/.