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Proof step 211 from proof rem-stays-reachable-aux2 (previous step)

path(r ' + x + H[r0].nxt ', H), reachable(r, r0, H), H[r0].nxt ∈ H, r0 ∈ H ⊦ reachable(r, (r ' + x).last, H), H[r0].nxt = null, r0 = r, r0 ∈ x, reachable(r, (r ' + x).last, H) ∧ ¬ reachable(r0, (r ' + x).last, H)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 212:
path(r ' + x + H[r0].nxt ', H), reachable(r, r0, H), H[r0].nxt ∈ H, r0 ∈ H ⊦ H[r0].nxt = null, r0 = r, reachable(r, (r ' + x).last, H), r0 ∈ x

Proof step 211 from proof rem-stays-reachable-aux2 (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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