/usr/share/acl2-6.3/books/coi/super-ihs/ is in acl2-books-certs 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/coi/super-ihs/arithmetic.cert
/usr/share/acl2-6.3/books/coi/super-ihs/ash.cert
/usr/share/acl2-6.3/books/coi/super-ihs/basics.cert
/usr/share/acl2-6.3/books/coi/super-ihs/bit-functions.cert
/usr/share/acl2-6.3/books/coi/super-ihs/bit-twiddling-logops.cert
/usr/share/acl2-6.3/books/coi/super-ihs/byte-p.cert
/usr/share/acl2-6.3/books/coi/super-ihs/c-functions.cert
/usr/share/acl2-6.3/books/coi/super-ihs/carry.cert
/usr/share/acl2-6.3/books/coi/super-ihs/eric.cert
/usr/share/acl2-6.3/books/coi/super-ihs/evenp.cert
/usr/share/acl2-6.3/books/coi/super-ihs/fast.cert
/usr/share/acl2-6.3/books/coi/super-ihs/from-rtl.cert
/usr/share/acl2-6.3/books/coi/super-ihs/hacks.cert
/usr/share/acl2-6.3/books/coi/super-ihs/inductions.cert
/usr/share/acl2-6.3/books/coi/super-ihs/iter-sqrt.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logapp.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logbit.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logbitp.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logcar.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logcdr.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logcons.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logext.cert
/usr/share/acl2-6.3/books/coi/super-ihs/loghead.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logical-logops.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logior-logapp-crock.cert
/usr/share/acl2-6.3/books/coi/super-ihs/loglist.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logpair.cert
/usr/share/acl2-6.3/books/coi/super-ihs/logtail.cert
/usr/share/acl2-6.3/books/coi/super-ihs/lshu.cert
/usr/share/acl2-6.3/books/coi/super-ihs/meta.cert
/usr/share/acl2-6.3/books/coi/super-ihs/min-max.cert
/usr/share/acl2-6.3/books/coi/super-ihs/plus-logapp-suck.cert
/usr/share/acl2-6.3/books/coi/super-ihs/signed-byte-p-overflow.cert
/usr/share/acl2-6.3/books/coi/super-ihs/super-ihs.cert
/usr/share/acl2-6.3/books/coi/super-ihs/unsigned-byte-p.cert