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Proof step 55 from proof validrefnotnull-union-at-right (conclusion)

⊦ validrefnotnull(str, r, ty, st0) ∧ is_classtype(ty) ∧ sk ∈ instfields(ty .class) ∧ is_fskey(sk) → (st ∪ st0)[r -- sk] = st0[r -- sk]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ validrefnotnull(str, r, ty, st) → r ≠ jvmref
Proof step 54:
validrefnotnull(str, r, ty, st0), is_classtype(ty), sk ∈ instfields(ty .class), is_fskey(sk) ⊦ (st ∪ st0)[r -- sk] = st0[r -- sk], r = jvmref

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]