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Proof step 6 from proof ac-dups-04 (previous step)

sk = fs ', is_fskey(sk) ⊦ addclass(class1, (sk × val) ' + (sk × val0) ', st) = addclass(class1, (sk × val) ', st), ¬ is_indexkey(sk) ∧ fs .class ≠ class1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
⊦ addclass(fs .class, (fs ' × val) ' + (fs ' × val0) ', st) = addclass(fs .class, (fs ' × val) ', st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(fs ')], [CSIMPSEQ : ⊦ is_fskey(fs ')])]]