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Proof step 9 from proof validref-put-samefield-01 (previous step)

oktype(val, ty, st), is_valid_ref(r, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, mkfs(class, ty, fieldvar) ' = _type, is_obj(r, st[r -- mkfs(class, ty, fieldvar) ', val]) ∨ is_array(r, st[r -- mkfs(class, ty, fieldvar) ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
is_valid_ref(r, st), oktype(val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _type, mkfs(class, ty, fieldvar) ' = _length, is_array(r, st[r -- mkfs(class, ty, fieldvar) ', val]), is_obj(r, st[r -- mkfs(class, ty, fieldvar) ', val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]