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Proof step 3 from proof getintarray-in-01 (previous step)

i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval ⊦ ∃ j. st[r -- i '] .intval = st[r -- j '] .intval ∧ 0 ≤ j ∧ j < st[r -- _length] .intval

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval ⊦ ∃ j. st[r -- i '] .intval = st[r -- j '] .intval ∧ ¬ j < 0 ∧ ¬ st[r -- _length] .intval ≤ j

Rule argument

[emptyarg]

Additional information

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