/usr/share/acl2-8.0dfsg/books/centaur/glmc/ is in acl2-books-source 8.0dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-8.0dfsg/books/centaur/glmc/bfr-mcheck-abc.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/bfr-mcheck.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/cert.acl2
/usr/share/acl2-8.0dfsg/books/centaur/glmc/counter.acl2
/usr/share/acl2-8.0dfsg/books/centaur/glmc/counter.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/glmc-generic-defs.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/glmc-generic-proof.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/glmc-templates.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/glmc-test.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/glmc.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/portcullis.acl2
/usr/share/acl2-8.0dfsg/books/centaur/glmc/portcullis.lisp
/usr/share/acl2-8.0dfsg/books/centaur/glmc/shape-spec-invert.lisp