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Proof step 8 from proof validref-put-norefval-equiv (previous step)

okval(st[r1 -- mkfs(class, ty0, fieldvar) '], ty0), r1 -- mkfs(class, ty0, fieldvar) ' ∈ st, okval(val, ty0), r1 ∈ st, st[r -- _type] .type ≤ ty ⊦ mkfs(class, ty0, fieldvar) ' = _length, ty0 = void_type, r = jvmref, is_referencevalue(val), validref(str, r, ty, st), junkref(str, r, st[r1 -- mkfs(class, ty0, fieldvar) ', val])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 7:
okval(st[r1 -- mkfs(class, ty0, fieldvar) '], ty0), r1 -- mkfs(class, ty0, fieldvar) ' ∈ st, okval(val, ty0), r1 ∈ st, st[r -- _type] .type ≤ ty ⊦ mkfs(class, ty0, fieldvar) ' = _length, ty0 = void_type, r = jvmref, is_referencevalue(val), r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st), junkref(str, r, st[r1 -- mkfs(class, ty0, fieldvar) ', val])

Rule argument

[crewrite-arg: validref-def, F, [st, ty, r, str] → [st, ty, r, str]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty, r, str)]]