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Proof step 18 from proof okarrays-not (conclusion)

⊦ ¬ okarrays(r, fis, st[r0 -- mkfs(class0, ty, fieldvar) ', val]) ∧ mkfs(class0, ty, fieldvar) ' ≠ _type ∧ oktype(val, ty, st) ∧ ¬ mkfs(class0, ty, fieldvar) ' ∈ fis ∧ mkfs(class0, ty, fieldvar) ' ≠ _length → ¬ okarrays(r, fis, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
oktype(val, ty, st), okarrays(r, fis, st) ⊦ mkfs(class0, ty, fieldvar) ' = _type, mkfs(class0, ty, fieldvar) ' = _length, okarrays(r, fis, st[r0 -- mkfs(class0, ty, fieldvar) ', val]), mkfs(class0, ty, fieldvar) ' ∈ fis

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]