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Proof step 9 from proof subset-len (previous step)

r ∈ st, okarray(r, ty, st), ∀ rk. rk ∈ st → rk ∈ st0 ∧ st[rk] = st0[rk] ⊦ r = jvmref, st0[r -- _length] .intval = st[r -- _length] .intval

User applied rule all left

And obtained the following new goals

Proof step 8:
r ∈ st, okarray(r, ty, st), r -- _length ∈ st → r -- _length ∈ st0 ∧ st[r -- _length] = st0[r -- _length], ∀ rk. rk ∈ st → rk ∈ st0 ∧ st[rk] = st0[rk] ⊦ r = jvmref, st0[r -- _length] .intval = st[r -- _length] .intval

Rule argument

[EXRARG : pos: left 3, [extquanttermlist: (r -- _length) abort:F , discard:F , computed:T ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r -- _length)]]