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Proof step 8 from proof validrefnotnull-getarray-subset (previous step)

¬ (st ⊆ st1 ∧ is_arrayref(r, i + j, st) ∧ 0 ≤ i), validrefnotnull(str, r, mkarraytype(ty), st), i + j ≤ st[r -- _length] .intval, st ⊆ st1, 0 ≤ i ⊦ getarray(r, i, j, st) = getarray(r, i, j, st1), r = jvmref

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
validrefnotnull(str, r, mkarraytype(ty), st), i + j ≤ st[r -- _length] .intval, st ⊆ st1, 0 ≤ i ⊦ getarray(r, i, j, st) = getarray(r, i, j, st1), r = jvmref, is_arrayref(r, i + j, st)

Rule argument

[emptyarg]

Additional information

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