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Proof step 14 from proof modnotreachable-reachable-rev (previous step)

r ∈ H, path(H[r].nxt ' + x0, H[r0, ce]), (H[r].nxt ' + x0).last ∈ H[r0, ce], r0 ∈ H, ∃ x. path(H[r].nxt ' + x, H) ∧ (H[r].nxt ' + x).last = (H[r].nxt ' + x0).last, (H[r].nxt ' + x0).last ∈ H ⊦ r = r0, r = null, reachable(r, r0, H), reachable(r, (H[r].nxt ' + x0).last, H), reachable(H[r].nxt, r0, H)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
(H[r].nxt ' + x).last = (H[r].nxt ' + x0).last, r ∈ H, path(H[r].nxt ' + x0, H[r0, ce]), (H[r].nxt ' + x0).last ∈ H[r0, ce], r0 ∈ H, path(H[r].nxt ' + x, H), (H[r].nxt ' + x0).last ∈ H ⊦ r = r0, r = null, reachable(r, r0, H), reachable(r, (H[r].nxt ' + x0).last, H), reachable(H[r].nxt, r0, H)

Proof step 14 from proof modnotreachable-reachable-rev (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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