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Proof step 2 from proof ri-cons-range-restrict-notin-gstore (previous step)

ri-cons(ri, nodes(gstore, ginval)) ⊦ range ri | n = ∅, n ∈ gstore

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
ri-cons(ri, nodes(gstore, ginval)) ⊦ #(range ri | n) = 0, range ri | 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]