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Proof step 35 from proof pushx-inv (previous step)

inv(ixs, # x) ⊦ inv(pushx(# x, ixs, x + a '), # x + 1)

User applied rule structural induction

And obtained the following new goals

Proof step 6:
inv([], # x) ⊦ inv(pushx(# x, [], x + a '), # x + 1)

Rule argument

indvar:ixs

Additional information

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