Hint Resolve f_pred_precise f_pred_positive.

Lemma hashtable_A_join : forall lgk lgv entries,
hashtable_A (repeat (0, singleton 0 0) (Z.to_nat size)) lgk lgv entries * hashtable_A (repeat (0, singleton 0 0) (Z.to_nat size)) lgk lgv entries =
hashtable_A (repeat (0, singleton 0 0) (Z.to_nat size)) lgk lgv entries.