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Proof step 10 from proof validrefkeynotnull-has-field (previous step)

st[rk] = refval(r), r = jvmref ∨ st[r -- _type] .type ≤ mkclasstype(class) ∧ ¬ junkref(str, r, st), rk ∈ st, sk ∈ instfields(class), is_fskey(sk) ⊦ r = jvmref, r -- sk ∈ st

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
st[rk] = refval(r), rk ∈ st, sk ∈ instfields(class), is_fskey(sk), st[r -- _type] .type ≤ mkclasstype(class) ⊦ r = jvmref, r -- sk ∈ st, junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]