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Proof step 7 from proof validref-put-badfield (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
st[r -- _type] .type ≤ ty, junkref(str, r, st[r0 -- fs ', val]), r ≠ r0 ∨ _type ≠ fs ' ⊦ r = jvmref, junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Rule argument

[emptyarg]

Additional information

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