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Proof step 7 from proof reach-alloc (previous step)

path(r ' + x, H) ⊦ x = [], (r ' + x).last ∈ H

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
path(r ' + x, H) ⊦ x = [], x.last ∈ H

Rule argument

Additional information

Used simplifier rules: a: ⊦ (x0 + x1) + x2 = x0 + x1 + x2; from specification list[reflist]% ⊦ x0 ≠ [] → (r ' + x0).last = x0.last; (s)