Arguments reach_in_exported_tgt {b m args} j _.

Lemma safe_match_target_atext cd j c m d tm z tr ef sig args :
(forall n, safeN tr_source geS n (z,tr,c) m) ->
match_state cd j c m d tm ->
at_external target d = Some (ef, sig, args) ->
exists c' m' n,
corestepN source geS n c m c' m'
/\ TraceSemantics.yielded source c'
/\ exists cd' j', match_state cd' j' c' m' d tm.