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Proof step 2 from proof restrict-range-notin-lebs (previous step)

fi.lebs ⊆ dom gstore ⊦ range fi | n = ∅, n ∈ gstore

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
fi.lebs ⊆ dom gstore ⊦ #(range fi | n) = 0, range fi | n = ∅, n ∈ gstore

Rule argument

Additional information

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