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Proof step 21 from proof compatobj-isobj (previous step)

st[r -- _type] = typeval(mkclasstype(class)), class+∃(str, class), compatfields(str, r, instfields(class), st), r -- _type ∈ st, r ∈ st ⊦ r = jvmref, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
st[r -- _type] = typeval(mkclasstype(class)), class+∃(str, class), compatfields(str, r, instfields(class), st), r -- _type ∈ st, r ∈ st ⊦ r = jvmref, goodfieldsandtypes(r, instfields(class), st)

Rule argument

[emptyarg]

Additional information

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