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Proof step 7 from proof validref-put (previous step)

oktype(val, ty, st), is_obj(r, st) ∨ is_array(r, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, is_array(r, st[r1 -- mkfs(class, ty, fieldvar) ', val]), is_obj(r, st[r1 -- mkfs(class, ty, fieldvar) ', val])

User applied rule case distinction

And obtained the following new goals

Proof step 4:
is_obj(r, st), oktype(val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, is_array(r, st[r1 -- mkfs(class, ty, fieldvar) ', val]), is_obj(r, st[r1 -- mkfs(class, ty, fieldvar) ', val])
Proof step 6:
is_array(r, st), oktype(val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, is_array(r, st[r1 -- mkfs(class, ty, fieldvar) ', val]), is_obj(r, st[r1 -- mkfs(class, ty, fieldvar) ', val])

Rule argument

[CASEDARG : pos: left 2, ()]

Additional information

[[CONCRETESIMPRULES : ()]]