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Proof step 8 from proof validrefkeynotnull-has-field (previous step)

¬ (r ≠ jvmref ∧ ¬ is_valid_ref(str, r, st)), 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)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ r -- sk ∈ st ∧ sk ∈ instfields(class) ∧ st[r -- _type] .type ≤ mkclasstype(class) ∧ r ≠ jvmref → ¬ is_valid_ref(str, r, st)])]]