Section NextIndexSafety.
Context {orig_base_params : BaseParams}.
Context {one_node_params : OneNodeParams orig_base_params}.
Context {raft_params : RaftParams orig_base_params}.
Context {aersi : append_entries_reply_sublog_interface}.
Context {si : sorted_interface}.

Lemma nextIndex_safety_init :
raft_net_invariant_init nextIndex_safety.