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Proof step 2 from proof rem-reachable (previous step)

ce.nxt = H[H[r1].nxt].nxt, reachable(r, r0, H), H[r1].nxt ∈ H, r1 ∈ H ⊦ H[r1].nxt = null, reachable(r, r0, H[r1, ce]) ↔ true, r0 = H[r1].nxt, r1 = null

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
ce.nxt = H[H[r1].nxt].nxt, reachable(r, r0, H), r1 ∈ H, H[r1].nxt ∈ H ⊦ H[r1].nxt = null, r0 = H[r1].nxt, r1 = null, reachable(r, r0, H[r1, ce])

Proof step 2 from proof rem-reachable (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information