1 | 6. u: Term 7. v: Term List 8. rho,ds,da,de,e,s,v@0,x:Top.
affects_trace_rel(tr.proj;kind(a);mk_rel(name, v)) 
(list_accum(x,t.x
([[t]] 1of(e) s v@0 tappend(tr;a));x;v) ~ list_accum(x,t....;x;v)) rho,ds,da,de,e,s,v@0,x:Top.
affects_trace_rel(tr.proj;kind(a);mk_rel(name, [u / v])) 
(list_accum(x,t.x
([[t]] 1of(e) s v@0 tappend(tr;a));x
([[u]] 1of(e) s v@0 tappend(tr;a));v) ~ ...) |