/usr/share/acl2-8.0dfsg/books/acl2s/defdata/ is in acl2-books-source 8.0dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/alistof.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/base.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/builtin-combinators.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/cert.acl2
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/defdata-attach.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/defdata-core.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/defdata-util.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/enumerators-gen.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/library-support.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/listof.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/map.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/mv-proof.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/num-list-fns.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/num-list-thms.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/random-state-basis1.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/random-state.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/record.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/register-combinator.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/register-data-constructor.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/register-type.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/rem-and-floor.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/sig.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/splitnat.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/switchnat.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/tau-characterization.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/top.lisp
/usr/share/acl2-8.0dfsg/books/acl2s/defdata/var-book.lisp