/usr/share/acl2-7.1/books/defexec/other-apps/ is in acl2-books 7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-7.1/books/defexec/other-apps/misc/
/usr/share/acl2-7.1/books/defexec/other-apps/misc/memos.o
/usr/share/acl2-7.1/books/defexec/other-apps/misc/stobjsim.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/extraction.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/final-theorem.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/first-last.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/intermediate-program.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/intermediate-to-spec.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/load-extract.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/merge-intermediate.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/nth-update-nth.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/permutations.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/programs.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/sort-qs-properties.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/spec-properties.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/split-qs-properties.o
/usr/share/acl2-7.1/books/defexec/other-apps/qsort/total-order.o
/usr/share/acl2-7.1/books/defexec/other-apps/records/
/usr/share/acl2-7.1/books/defexec/other-apps/records/inline.o
/usr/share/acl2-7.1/books/defexec/other-apps/records/records-bsd.o
/usr/share/acl2-7.1/books/defexec/other-apps/records/records.o
/usr/share/acl2-7.1/books/defexec/other-apps/records/recordsim.o