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Proof step 1 from proof path-butlast (conclusion)

⊦ path(r ' + x + r0 ', H) → (¬ path(r ' + x, H) ↔ false)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: path-prefix: ⊦ path(r ' + x + y, H) → (¬ path(r ' + x, H) ↔ false);%a: ⊦ (x0 + x1) + x2 = x0 + x1 + x2; from specification list[reflist]