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Instance QS: listspec t_struct_elem _next.

(* Specifications: *)
Lemma body_fifo_put: semax_body V G f_fifo_put (fifo_put_spec fifo).
Admitted.
Lemma body_fifo_empty: semax_body V G f_fifo_empty (fifo_empty_spec fifo).
Admitted.
Lemma body_fifo_get: semax_body V G f_fifo_get (fifo_get_spec fifo).
Admitted.