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Proof step 26 from proof getbar-subset (previous step)

okbytearray(r, st), st ⊆ st0 ⊦ st[r -- _length] .intval ≤ 0 ∧ st0[r -- _length] .intval ≤ 0 ∨ 0 ≤ st[r -- _length] .intval ∧ st[r -- _length] .intval = st0[r -- _length] .intval ∧ (∀ j1. 0 ≤ j1 ∧ j1 < st[r -- _length] .intval → st[r -- j1 '] .byteval = st0[r -- j1 '] .byteval)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ okbytearray(r, st) → ¬ st[r -- _length] .intval < 0
Proof step 25:
okbytearray(r, st), st ⊆ st0 ⊦ ¬ 0 < st[r -- _length] .intval ∧ ¬ 0 < st0[r -- _length] .intval, st[r -- _length] .intval = st0[r -- _length] .intval ∧ (0 ≤ j ∧ j < st[r -- _length] .intval → st[r -- j '] .byteval = st0[r -- j '] .byteval)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ i ≤ j ↔ j < i])]]