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Proof step 8 from proof acyclic-rem-not-reachable (previous step)

ce.nxt = H[H[r0].nxt].nxt, r0 ∈ H, H[r0].nxt ∈ H[r0, ce], H[r0].nxt ∈ H, reachable(H[r0].nxt, r0, H), ∀ r1. ¬ reachable(H[r1].nxt, r1, H) ⊦ H[r0].nxt = null

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 6 terms: r0

Additional information

Used terms: r0