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Proof step 9 from proof validref-put-badarrayfield (conclusion)

⊦ validref(str, r, ty, st) ∧ fs ' ≠ _type ∧ is_arraytype(st[r0 -- _type] .type) ∧ fs ' ≠ _length → validref(str, r, ty, st[r0 -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
is_arraytype(st[r0 -- _type] .type), validref(str, r, ty, st) ⊦ fs ' = _type, fs ' = _length, validref(str, r, ty, st[r0 -- fs ', val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]