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Proof step 18 from proof isobj-put-badfield (previous step)

st[r -- _type] = typeval(ty), ty = mkclasstype(class), r ∈ st, is_obj(r, class, st), is_typevalue(st[r -- _type]), r -- _type ∈ st ⊦ r = jvmref, fs ' = _type, is_obj(r, st[r -- fs ', val]), fs ' ∈ instfields(class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, is_obj(r, class, st), r ∈ st ⊦ fs ' = _type, r = jvmref, fs ' ∈ instfields(class), is_obj(r, st[r -- fs ', val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_typevalue(typeval(ty))])]]