/usr/share/acl2-8.0dfsg/books/bdd/benchmarks.acl2 is in acl2-books-source 8.0dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | (ld "create-benchmarks.lsp")
:u
(certify-book "benchmarks" ? t)
|