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Proof step 2 from proof at-del-ro-data (previous step)

datakey(ino, n) ∈ ri ⊦ (ri ⊖ key0)[datakey(ino, n)] = ri[datakey(ino, n)], datakey(ino, n) = key0, inodekey(ino) = key0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information