Change the length of the truth4arr array.
In the execution this resizes (to grow or shrink) the underlying Common Lisp array. The logical definition is based on resize-list:
Function:
(defun resize-truth4s$a (stobjs::i truth4arr$a) (declare (xargs :guard (truth4arr$ap truth4arr$a))) (resize-list truth4arr$a stobjs::i '0))