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Proof step 9 from proof bar-zero (conclusion)

⊦ getbytearray(r, st) = [] ↔ st[r -- _length] .intval ≤ 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
⊦ getbytearray(r, st) = [] ↔ ¬ 0 < st[r -- _length] .intval

Rule argument

[emptyarg]

Additional information

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