Definition no_append_entries_to_leader' (net : network) : Prop :=
    forall p t n pli plt es ci,
      In p (nwPackets net) ->
      pBody p = AppendEntries t n pli plt es ci ->
      type (snd (nwState net (pDst p))) = Leader ->
      currentTerm (snd (nwState net (pDst p))) = t ->
      False.Definition no_append_entries_to_self' (net : network) : Prop :=
    forall p t n pli plt es ci,
      In p (nwPackets net) ->
      pBody p = AppendEntries t n pli plt es ci ->
      pDst p = pSrc p ->
      False.

Theorem no_append_entries_to_self'_invariant : forall net, refined_raft_intermediate_reachable net -> no_append_entries_to_self' net.