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Proof step 18 from proof ac-lookup (previous step)

is_fskey((sk × val) .1) ∧ (sk × val) .1 .fs .class ≠ class1, is_fskey(sk), mkfs(class1, ty, fieldvar) ' ∈ fis0, ∀ class1, ty, fieldvar, st. 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 17:
mkfs(class1, ty, fieldvar) ' ∈ fis0, is_fskey(sk), ∀ class1, ty, fieldvar, st. 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) '], sk .fs .class = class1

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (sk × val) .1 = sk])]]