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Proof step 45 from proof junkref-class (previous step)

st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), ¬ st[r0 -- _type] .type ≤ ty ∨ junkref(str, r0, st) ⊦ r0 = jvmref, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

User applied rule cut formula

And obtained the following new goals

Proof step 31:
¬ st[r0 -- _type] .type ≤ ty, st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), ¬ st[r0 -- _type] .type ≤ ty ∨ junkref(str, r0, st) ⊦ r0 = jvmref, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)
Proof step 44:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), ¬ st[r0 -- _type] .type ≤ ty ∨ junkref(str, r0, st) ⊦ ¬ st[r0 -- _type] .type ≤ ty, r0 = jvmref, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[fma-arg: ¬ st[r0 -- _type] .type ≤ ty]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (¬ st[r0 -- _type] .type ≤ ty)]]