| ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[r -- _type] .type, st), is_valid_ref(str, r0, st) ⊦ junkref(str, r, st[r0 -- sk, val]), sk = _type, path∃(str, r, r0, st) |
junkrefs(str, refs, st[refs .first -- _type] .type, st), is_valid_ref(str, r0, st) ⊦ sk = _type, refs = [], junkref(str, refs .first, st[r0 -- sk, val]), path∃(str, refs .first, r0, st)
[[CONCRETESIMPRULES : ()]]