| 1 |
match(lnk(kind(e));t;time(e))

match(lnk(kind(e'));t';time(e'))

(loc(e) = loc(e') Id & time(e)<time(e')
(
(source(lnk(kind(e))) = source(lnk(kind(e'))) & t<t'
( source(lnk(kind(e))) = source(lnk(kind(e'))) & t = t'
( & ||rcvs(lnk(kind(e));time(e))||
( & -||snds(lnk(kind(e));t)||<||rcvs(lnk(kind(e'));time(e'))||
( & -||snds(lnk(kind(e'));t')||)
 | 45 steps |