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Proof step 11 from proof reach-n-path-n (previous step)

∃ x. path(x, H) ∧ hd x = r ∧ x.last = r0 ∧ # x = 2 ⊦ r ≠ null ∧ H[r].nxt ≠ null ∧ r ∈ H ∧ H[r].nxt ∈ H ∧ H[r].nxt = r0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information