/usr/share/acl2-6.5/books/coi/paths/ is in acl2-books-source 6.5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.5/books/coi/paths/cert.acl2
/usr/share/acl2-6.5/books/coi/paths/compatibility.lisp
/usr/share/acl2-6.5/books/coi/paths/cp-set.lisp
/usr/share/acl2-6.5/books/coi/paths/defs.lisp
/usr/share/acl2-6.5/books/coi/paths/diverge.lisp
/usr/share/acl2-6.5/books/coi/paths/dominates.lisp
/usr/share/acl2-6.5/books/coi/paths/equiv.lisp
/usr/share/acl2-6.5/books/coi/paths/hints.lisp
/usr/share/acl2-6.5/books/coi/paths/list-path-connection.lisp
/usr/share/acl2-6.5/books/coi/paths/meta.lisp
/usr/share/acl2-6.5/books/coi/paths/path.lisp
/usr/share/acl2-6.5/books/coi/paths/pm.lisp