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Proof step 5 from proof validref-put-array-refval (previous step)

is_arraytype(st[r0 -- _type] .type), mkarraytype(ty) ≤ st[r0 -- _type] .type, validref(str, r1, ty, st), r = jvmref ∨ st[r -- _type] .type ≤ ty0 ∧ ¬ junkref(str, r, st), r1 = jvmref → is_reftype(ty) ⊦ r0 = jvmref, r = jvmref ∨ (st[r0 -- i ', refval(r1)][r -- _type]) .type ≤ ty0 ∧ ¬ junkref(str, r, st[r0 -- i ', refval(r1)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
is_arraytype(st[r0 -- _type] .type), mkarraytype(ty) ≤ st[r0 -- _type] .type, validref(str, r1, ty, st), st[r -- _type] .type ≤ ty0, junkref(str, r, st[r0 -- i ', refval(r1)]), r1 = jvmref → is_reftype(ty) ⊦ r0 = jvmref, r = jvmref, junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (st[r -- i ', val][r0 -- _type]) = st[r0 -- _type]])]]