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Proof step 4 from proof is_valid_ref-put-byte (conclusion)

⊦ is_array(str, r0, st) ∧ okbytearray(r, st) → is_valid_ref(str, r0, st[r -- i ', byteval(by)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ is_valid_ref(str, r, st) ↔ is_obj(str, r, st) ∨ is_array(str, r, st)
Proof step 2:
⊦ is_obj(str, r, st[r0 -- i ', val]) ↔ is_obj(str, r, st)
Proof step 3:
⊦ is_array(str, r, st) → ¬ is_obj(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_array(str, r0, st) ∧ okbytearray(r, st) → is_array (str, r0, st[r -- i ', byteval(by)])])]]