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Proof step 74 from proof validrefs-put-array-badindex (conclusion)

⊦ i < 0 → (validrefs(str, refs, ty, st[r -- i ', val]) ↔ validrefs(str, refs, ty, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 73:
i < 0 ⊦ validrefs(str, refs, ty, st[r -- i ', val]) ↔ validrefs(str, refs, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPNAMEDFORWARD : int-abs, , forward-le-02, ⊦ j < i ∧ i ≤ 0 → j < 0])]]