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Proof step 1 from proof fromnext-reachable (conclusion)

⊦ reachable(r, r0, H) ∧ r ≠ r0 → (¬ reachable(H[r].nxt, r0, H) ↔ false)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
reachable(r, r0, H), r0 ∈ H ⊦ r = r0, reachable(H[r].nxt, r0, H)

Rule argument

Additional information

Used simplifier rules: reach-alloc: ⊦ reachable(r, r1, H) → r1 ∈ H;