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Proof step 18 from proof compatobj-isobj (previous step)

st[r -- _type] = typeval(mkclasstype(class)), class+∃(str, class), ∀ sk. sk ∈ instfields(class) → r -- sk ∈ st ∧ is_fskey(sk) ∧ compat(str, st[r -- sk], sk .fs .type, st), r -- _type ∈ st, r ∈ st ⊦ r = jvmref, ∀ sk. sk ∈ instfields(class) → goodfieldandtype(r, sk, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
st[r -- _type] = typeval(mkclasstype(class)), r ∈ st, r -- _type ∈ st, class+∃(str, class), sk ∈ instfields(class), ∀ sk. sk ∈ instfields(class) → r -- sk ∈ st ∧ is_fskey(sk) ∧ compat(str, st[r -- sk], sk .fs .type, st) ⊦ r = jvmref, goodfieldandtype(r, sk, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]