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Proof step 22 from proof ac-bad-01 (previous step)

¬ is_indexkey(fv .1), ∀ class1, class2, ty, fieldvar, val, st. class1 = class2 ∨ addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st) ⊦ class1 = class2, addclass(class1, (fv ' + fis0) + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fv ' + fis0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
is_fskey(fv .1), ∀ class1, class2, ty, fieldvar, val, st. class1 = class2 ∨ addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st) ⊦ class1 = class2, addclass(class1, (fv ' + fis0) + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fv ' + fis0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(sk) ↔ is_fskey(sk)])]]