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Proof step 31 from proof validFields-putfis (previous step)

unique_al(fis) ⊦ _type ≠ sk ∧ _length ≠ sk ∧ hasKeys(r, fis[sk, val] .keys, st) ↔ hasKeys(r, fis .keys, st) ∧ sk ≠ _length ∧ sk ≠ _type ∧ r -- sk ∈ st, _length ∈ fis, _type ∈ fis

User applied rule case distinction

And obtained the following new goals

Rule argument

[CASEDARG : pos: right 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]