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Proof step 3 from proof ac-no1 (previous step)

sk = fs ', is_fskey(sk) ⊦ fs .class = class, addclass(class, (sk × val) ' + fis, st) = addclass(class, fis, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ fs .class = class, addclass(class, (fs ' × val) ' + fis, st) = addclass(class, fis, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_fskey(fs ')])]]