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Proof step 19 from proof ac-dups-05 (previous step)

is_indexkey(sk) ⊦ addclass(class1, fis1 + (sk × val0) ', st) = addclass(class1, fis1, st)

User applied rule structural induction

And obtained the following new goals

Proof step 18:
⊦ addclass(class1, fis + (i ' × val) ', st) = addclass(class1, fis, st)

Rule argument

[VARWITHFMAVARSARG : sk, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : storekey generated by ', ';], [CSIMPSEQ : ⊦ ¬ is_indexkey(fs ')], [CSIMPSEQ : ⊦ (fis + fis0) + fis1 = fis + fis0 + fis1])]]