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Proof step 1 from proof changenonnxt-reachable-rev (conclusion)

⊦ reachable(r, r0, H[r1, ce]) ∧ ce.nxt = H[r1].nxt ∧ r1 ∈ H → (¬ reachable(r, r0, H) ↔ false)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
ce.nxt = H[r1].nxt, reachable(r, r0, H[r1, ce]), r1 ∈ H, r0 ∈ H[r1, ce] ⊦ reachable(r, r0, H)

Rule argument

Additional information

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