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

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

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

Rule argument

Additional information

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