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Proof step 7 from proof is_obj-field-norefval (previous step)

st[r -- _type] = typeval(mkclasstype(class)), r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st), class+∃(str, class), r ∈ st, mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_reftype(ty), r -- _type ∈ st ⊦ r = jvmref, is_referencevalue(st[r -- mkfs(class0, ty, fieldvar) ']), is_abstract(class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
st[r -- _type] = typeval(mkclasstype(class)), goodfieldsandtypes(r, instfields(class), st), class+∃(str, class), r ∈ st, mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_reftype(ty), r -- _type ∈ st ⊦ r = jvmref, is_referencevalue(st[r -- mkfs(class0, ty, fieldvar) ']), is_abstract(class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk × val ∈ st ↔ rk ∈ st ∧ st[rk] = val])]]