let a, b be Data-Location ; for il being Element of NAT holds NIC ((AddTo (a,b)),il) = {(succ il)}
let il be Element of NAT ; NIC ((AddTo (a,b)),il) = {(succ il)}
set i = AddTo (a,b);
for s being State of SCM st IC s = il holds
(Exec ((AddTo (a,b)),s)) . (IC SCM) = succ (IC s)
by AMI_3:9;
hence
NIC ((AddTo (a,b)),il) = {(succ il)}
by Lm4; verum