Major Section: EVENTS
Note: This is an event! It does not print the usual event summary
but nevertheless changes the ACL2 logical world and is so
recorded. Moreover, its effect is to set the acl2-defaults-table, and
hence its effect is local to the book or encapsulate form
containing it; see acl2-defaults-table.
This event sets the global backchain-limit used by the ACL2
rewriter. It must be nil or a non-negative integer.
(See backchain-limit for details.)
:set-backchain-limit nil ; do not impose any additional limits
:set-backchain-limit 0 ; allow only type reasoning for relieving
; hypotheses
:set-backchain-limit 500 ; allow backchaining to a depth of no more
; than 500
The default limit is nil.