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Proof step 11 from proof validref-put-badfield (previous step)

validref(str, r, ty, st) ⊦ r -- _type = r0 -- fs ', r = jvmref, is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type), (st[r0 -- fs ', val][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r0 -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
validref(str, r, ty, st), r ≠ r0 ∨ _type ≠ fs ' ⊦ r = jvmref, is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type), (st[r0 -- fs ', val][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r0 -- fs ', val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r -- sk = r0 -- sk0 ↔ ¬ ¬ (r = r0 ∧ sk = sk0)])]]