/usr/share/acl2-6.3/books/tools/ is in acl2-books-source 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/tools/advise.acl2
/usr/share/acl2-6.3/books/tools/advise.lisp
/usr/share/acl2-6.3/books/tools/bstar.lisp
/usr/share/acl2-6.3/books/tools/case-splitting-rules.lisp
/usr/share/acl2-6.3/books/tools/clone-stobj.lisp
/usr/share/acl2-6.3/books/tools/cws.lisp
/usr/share/acl2-6.3/books/tools/def-functional-instance.lisp
/usr/share/acl2-6.3/books/tools/defconsts.lisp
/usr/share/acl2-6.3/books/tools/defevaluator-fast.lisp
/usr/share/acl2-6.3/books/tools/define-keyed-function.lisp
/usr/share/acl2-6.3/books/tools/defined-const.lisp
/usr/share/acl2-6.3/books/tools/defmacfun.lisp
/usr/share/acl2-6.3/books/tools/defredundant.lisp
/usr/share/acl2-6.3/books/tools/defsum.lisp
/usr/share/acl2-6.3/books/tools/deftuple.lisp
/usr/share/acl2-6.3/books/tools/do-not.lisp
/usr/share/acl2-6.3/books/tools/easy-simplify.lisp
/usr/share/acl2-6.3/books/tools/fake-event.lisp
/usr/share/acl2-6.3/books/tools/flag.acl2
/usr/share/acl2-6.3/books/tools/flag.lisp
/usr/share/acl2-6.3/books/tools/in-raw-mode.acl2
/usr/share/acl2-6.3/books/tools/in-raw-mode.lisp
/usr/share/acl2-6.3/books/tools/include-raw.lisp
/usr/share/acl2-6.3/books/tools/lint.acl2
/usr/share/acl2-6.3/books/tools/lint.lisp
/usr/share/acl2-6.3/books/tools/match-tree.lisp
/usr/share/acl2-6.3/books/tools/mv-nth.lisp
/usr/share/acl2-6.3/books/tools/oracle-eval-real.acl2
/usr/share/acl2-6.3/books/tools/oracle-eval-real.lisp
/usr/share/acl2-6.3/books/tools/oracle-eval.lisp
/usr/share/acl2-6.3/books/tools/pack.lisp
/usr/share/acl2-6.3/books/tools/pattern-match.lisp
/usr/share/acl2-6.3/books/tools/plev-ccl.acl2
/usr/share/acl2-6.3/books/tools/plev-ccl.lisp
/usr/share/acl2-6.3/books/tools/plev.lisp
/usr/share/acl2-6.3/books/tools/rulesets.lisp
/usr/share/acl2-6.3/books/tools/safe-case.lisp
/usr/share/acl2-6.3/books/tools/saved-errors.lisp
/usr/share/acl2-6.3/books/tools/stobj-frame.lisp
/usr/share/acl2-6.3/books/tools/stobj-help.lisp
/usr/share/acl2-6.3/books/tools/templates.lisp
/usr/share/acl2-6.3/books/tools/theory-tools.lisp
/usr/share/acl2-6.3/books/tools/time-dollar-with-gc.acl2
/usr/share/acl2-6.3/books/tools/time-dollar-with-gc.lisp
/usr/share/acl2-6.3/books/tools/trivial-ancestors-check.lisp
/usr/share/acl2-6.3/books/tools/types-misc.lisp
/usr/share/acl2-6.3/books/tools/with-arith5-help.lisp
/usr/share/acl2-6.3/books/tools/with-quoted-forms.lisp