/usr/share/acl2-6.3/books/models/ is in acl2-books-certs 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/models/jvm/
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/alternating-sum-variant.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/alternating-sum.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/bexpt.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/defsys-utilities.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/defsys.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/div.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/even-solution-1.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/even-solution-2.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/expt.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/fact.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/fib.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/find-k!.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/funny-fact.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/good-statep.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/implementation.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/lessp.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/low-seven.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/m1.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/magic.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/power.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/sign.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/sum.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/sumsq.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/template.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/theorems-a-and-b.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/tmi-reductions.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/use-when.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/verify-guards.cert
/usr/share/acl2-6.3/books/models/jvm/guard-verified-m1/wormhole-abstraction.cert
/usr/share/acl2-6.3/books/models/jvm/m1/
/usr/share/acl2-6.3/books/models/jvm/m1-original/
/usr/share/acl2-6.3/books/models/jvm/m1-original/m1-story.cert
/usr/share/acl2-6.3/books/models/jvm/m1-original/problem-set-1-answers.cert
/usr/share/acl2-6.3/books/models/jvm/m1/alternating-sum-variant.cert
/usr/share/acl2-6.3/books/models/jvm/m1/alternating-sum.cert
/usr/share/acl2-6.3/books/models/jvm/m1/bexpt.cert
/usr/share/acl2-6.3/books/models/jvm/m1/defsys-utilities.cert
/usr/share/acl2-6.3/books/models/jvm/m1/defsys.cert
/usr/share/acl2-6.3/books/models/jvm/m1/div.cert
/usr/share/acl2-6.3/books/models/jvm/m1/even-solution-1.cert
/usr/share/acl2-6.3/books/models/jvm/m1/even-solution-2.cert
/usr/share/acl2-6.3/books/models/jvm/m1/expt.cert
/usr/share/acl2-6.3/books/models/jvm/m1/fact.cert
/usr/share/acl2-6.3/books/models/jvm/m1/fib.cert
/usr/share/acl2-6.3/books/models/jvm/m1/find-k!.cert
/usr/share/acl2-6.3/books/models/jvm/m1/funny-fact.cert
/usr/share/acl2-6.3/books/models/jvm/m1/implementation.cert
/usr/share/acl2-6.3/books/models/jvm/m1/lessp.cert
/usr/share/acl2-6.3/books/models/jvm/m1/low-seven.cert
/usr/share/acl2-6.3/books/models/jvm/m1/m1-half-via-inductive-assertions.cert
/usr/share/acl2-6.3/books/models/jvm/m1/m1.cert
/usr/share/acl2-6.3/books/models/jvm/m1/magic.cert
/usr/share/acl2-6.3/books/models/jvm/m1/power.cert
/usr/share/acl2-6.3/books/models/jvm/m1/sign.cert
/usr/share/acl2-6.3/books/models/jvm/m1/sum.cert
/usr/share/acl2-6.3/books/models/jvm/m1/sumsq.cert
/usr/share/acl2-6.3/books/models/jvm/m1/template.cert
/usr/share/acl2-6.3/books/models/jvm/m1/theorems-a-and-b.cert
/usr/share/acl2-6.3/books/models/jvm/m1/tmi-reductions.cert
/usr/share/acl2-6.3/books/models/jvm/m1/wormhole-abstraction.cert
/usr/share/acl2-6.3/books/models/jvm/m5/
/usr/share/acl2-6.3/books/models/jvm/m5/apprentice-state.cert
/usr/share/acl2-6.3/books/models/jvm/m5/demo.cert
/usr/share/acl2-6.3/books/models/jvm/m5/idemo.cert
/usr/share/acl2-6.3/books/models/jvm/m5/infinite-fair-schedule.cert
/usr/share/acl2-6.3/books/models/jvm/m5/isort.cert
/usr/share/acl2-6.3/books/models/jvm/m5/jvm-fact-setup.cert
/usr/share/acl2-6.3/books/models/jvm/m5/m5.cert
/usr/share/acl2-6.3/books/models/jvm/m5/partial.cert
/usr/share/acl2-6.3/books/models/jvm/m5/perm.cert
/usr/share/acl2-6.3/books/models/jvm/m5/universal-never-returns.cert
/usr/share/acl2-6.3/books/models/jvm/m5/universal.cert
/usr/share/acl2-6.3/books/models/jvm/m5/utilities.cert