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Proof step 1 from proof validrefs-put-badarrayfield-01 (
previous step
)
⊦ ¬ junkref(str, r, st) ∧ fs ' ≠ _type ∧ is_arraytype(st[r0 -- _type] .type) ∧ fs ' ≠ _length → ¬ junkref(str, r, st[r0 -- fs ', val])
A spec-lemma