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Proof step 2 from proof encode (previous step)

buf0 = buf, vtbl0 = vtbl, # buf ≥ # vtbl * (ENCODED_NAT_SIZE + ENCODED_VOLID_SIZE) + ENCODED_NAT_SIZE ⊦ ⟪encode_vtbl#(; vtbl, buf; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ (err = ESUCCESS → is-encoded(vtbl0, buf)))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
buf0 = buf, vtbl0 = vtbl, # vtbl * (ENCODED_NAT_SIZE + ENCODED_VOLID_SIZE) + ENCODED_NAT_SIZE ≤ # buf ⊦ ⟪encode_vtbl#(; vtbl, buf; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ (err = ESUCCESS → is-encoded(vtbl0, buf)))

Rule argument

Additional information

Used simplifier rules: ⊦ n ≥ m ↔ m ≤ n; (s)