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Proof step 21 from proof ac-isarray (previous step)

fv = sk × val, is_fskey(sk), ∀ r, i, class1, st. is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st) ⊦ sk .fs .class = class1, is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
is_fskey(sk), ∀ r, i, class1, st. is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st) ⊦ sk .fs .class = class1, is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]