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Proof step 11 from proof unchanged-class-forward (previous step)

st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), is_obj(str, r, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), r0 ≠ jvmref → st[r0 -- _type] .type ≤ ty ∧ is_valid_ref(str, r0, st) ⊦ r = jvmref, unchanged(str, r0, st, st1)

User applied rule cut formula

And obtained the following new goals

Proof step 8:
r0 ≠ jvmref, st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), is_obj(str, r, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), r0 ≠ jvmref → st[r0 -- _type] .type ≤ ty ∧ is_valid_ref(str, r0, st) ⊦ r = jvmref, unchanged(str, r0, st, st1)
Proof step 10:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), is_obj(str, r, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), r0 ≠ jvmref → st[r0 -- _type] .type ≤ ty ∧ is_valid_ref(str, r0, st) ⊦ r0 ≠ jvmref, r = jvmref, unchanged(str, r0, st, st1)

Rule argument

[fma-arg: r0 ≠ jvmref]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (r0 ≠ jvmref)]]