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Proof step 4 from proof validrefnotnull-bytearray (conclusion)

⊦ validrefnotnull(str, r, mkarraytype(byte_type), st) ↔ okbytearray(r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ ¬ okbytearray(r, st) → ¬ validrefnotnull(str, r, mkarraytype(byte_type), st)
Proof step 3:
okbytearray(r, st) ⊦ validrefnotnull(str, r, mkarraytype(byte_type), st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]