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Proof step 27 from proof ordered-precedes-h (previous step)

ordered(ix0 + n0 ' + ix1 + n1 ' + ix2, x) ⊦ n1 < n0 ∧ ¬ x[n1] < x[n0]

User applied rule structural induction

And obtained the following new goals

Proof step 10:
ordered([] + n0 ' + ix1 + n1 ' + ix2, x) ⊦ n1 < n0 ∧ ¬ x[n1] < x[n0]

Rule argument

indvar:ix0

Additional information

[Concretesimprules((Csimpgen(ilist freely generated by [], +;)))]