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Proof step 59 from proof replayorphans-prepost (previous step)

err = ESUCCESS, ks = ks0, ks = ro, ks1 = ro1, ri1 = ri0, ro0 = ro1, ri ⊖ ro = ri1 ⊖ ro1, ks.inodes?, ro1.inodes?, ro ⊆ ro1 ⊦ ks = ∅, ∃ key. key ∈ ks

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 60:
ri ⊖ ro = ri1 ⊖ ro1, ro.inodes?, ro1.inodes?, ro ⊆ ro1 ⊦ # ro = 0, ro = ∅, ∃ key. key ∈ ro

Rule argument

Additional information

Used simplifier rules: size-zero: ⊦ # ks ≠ 0 → ks ≠ ∅; (forward) from specification set-basic[node-index]%size-zero-01: ⊦ ks ≠ ∅ → # ks ≠ 0; (forward) from specification set-basic[node-index]