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Proof step 12 from proof validrefkeynotnull-has-field (previous step)

st[rk] = refval(r), is_fskey(sk), sk ∈ instfields(class), rk ∈ st, r ≠ jvmref ∧ validref(str, r, mkclasstype(class), st) ⊦ r = jvmref, r -- sk ∈ st

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
st[rk] = refval(r), validref(str, r, mkclasstype(class), st), rk ∈ st, sk ∈ instfields(class), is_fskey(sk) ⊦ r = jvmref, r -- sk ∈ st

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]