/usr/share/acl2-7.2dfsg/books/centaur/sv/ is in acl2-books-source 7.2dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-7.2dfsg/books/centaur/sv/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/cosims/
/usr/share/acl2-7.2dfsg/books/centaur/sv/cosims/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/cosims/cosims.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/address.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/alias-norm.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/compile.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/lhs.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/moddb.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/svmods.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/mods/top.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/portcullis.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/portcullis.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/4vec-base.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/4vec-subtypes.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/4vec.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/4vmask.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/a4vec-ops.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/a4vec.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/aig-arith.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/argmasks.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/compose.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/concat-rw.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/context-alist.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/env-ops.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/eval.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/junk.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/lattice.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/rewrite-base.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/rewrite-rules.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/rewrite-trace.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/rewrite.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/rsh-concat.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/svex-equivs.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/svex.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/symbolic.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/top.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/vars.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svex/xeval.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/debug.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/decomp.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/doc.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/expand.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/process.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/structure.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/top.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/svtv/vcd.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/top.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/alu.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/booth-support.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/boothpipe.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/tutorial/support.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/cert.acl2
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/elaborate.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/expr.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/moddb.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/svstmt-compile.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/svstmt.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/top.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/trunc.lisp
/usr/share/acl2-7.2dfsg/books/centaur/sv/vl/vl-svstmt.lisp