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Proof step 22 from proof validref-forward (conclusion)

⊦ r ≠ jvmref ∧ validref(str, r, mkclasstype(class), st0) ∧ fs ' ∈ instfields(class) ∧ is_reftype(fs .type) → validref(str, st0[r -- fs '] .refval, fs .type, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
is_reftype(fs .type), fs ' ∈ instfields(class), validref(str, r, mkclasstype(class), st0) ⊦ r = jvmref, validref(str, st0[r -- fs '] .refval, fs .type, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]