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Proof step 5 from proof ac-del-02 (previous step)

sk = fs ', is_fskey(sk) ⊦ (addclass(class1, (sk × val0) ' + fis0, st)[jvmref -- sk, val]) = (addclass(class1, fis0, st)[jvmref -- sk, val]), ¬ is_indexkey(sk) ∧ fs .class ≠ class1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
⊦ (addclass(fs .class, (fs ' × val0) ' + fis0, st)[jvmref -- fs ', val]) = (addclass(fs .class, fis0, st)[jvmref -- fs ', val])

Rule argument

[emptyarg]

Additional information

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