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Proof step 16 from proof putbar-classfield-onlymod (previous step)

st[r -- _type] .type = mkclasstype(class), st[r -- mkfs(class0, ty, fieldvar) '] = refval(r1), okbytearray(r1, st), mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_obj(str, r, st) ⊦ st[r1 -- sk0] = (putByteArray(bytes, r1, st)[r1 -- sk0]), r = r1, r = jvmref, junkref(str, r, st), validrefs(str, r1 ', ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 10:
⊦ validrefs(str, r ', ty, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty
Proof step 15:
st[r -- _type] .type = mkclasstype(class), st[r -- mkfs(class0, ty, fieldvar) '] = refval(r1), okbytearray(r1, st), mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_obj(str, r, st) ⊦ st[r1 -- sk0] = (putByteArray(bytes, r1, st)[r1 -- sk0]), r = r1, r = jvmref, junkref(str, r, st), r1 = jvmref ∨ r1 ≠ jvmref ∧ is_valid_ref(str, r1, st) ∧ st[r1 -- _type] .type ≤ ty

Rule argument

[speclemmaarg: , validrefs(str, r ', ty, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty ,[st, ty, r, str] → [st, ty, r1, str] ,F ,cyclic , ,validrefs-one ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty, r1, str)]]