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Proof step 25 from proof ac-lookup (previous step)

is_indexkey(sk), mkfs(class1, ty, fieldvar) ' ∈ fis0, mkfs(class1, ty, fieldvar) ' ∈ fis0 → (addclass(class1, fis0, st)[jvmref -- mkfs(class1, ty, fieldvar) ']) = fis0[mkfs(class1, ty, fieldvar) '] ⊦ (addclass(class1, fis0, st)[jvmref -- mkfs(class1, ty, fieldvar) ']) = ((sk × val) ' + fis0)[mkfs(class1, ty, fieldvar) ']

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 24:
(addclass(class1, fis0, st)[jvmref -- mkfs(class1, ty, fieldvar) ']) = fis0[mkfs(class1, ty, fieldvar) '], is_indexkey(sk), mkfs(class1, ty, fieldvar) ' ∈ fis0 ⊦ fis0[mkfs(class1, ty, fieldvar) '] = ((sk × val) ' + fis0)[mkfs(class1, ty, fieldvar) ']

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]