| cyclic(str, r, st[r1 -- i ', byteval(by)]), okbytearray(r1, st) ⊦ cyclic(str, r, st) |
⊦ cyclic(str, r, st) ↔ (∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, st[r -- _type] .type, st))
∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, (st[r1 -- i ', byteval(by)][r -- _type]) .type, st[r1 -- i ', byteval(by)]), okbytearray(r1, st) ⊦ cyclic(str, r, st)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r1 -- i ', byteval(by)], r, str)]]