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Proof step 3 from proof prepost-read-superblock (previous step)

avol[0] = mapped(buf), # avol ≠ 0, ebm-vol-inv(avol), is-encoded(sb0, buf) ⊦ ⟪persistence_io_read_superblock#(EB_PAGE_SIZE, LEB_SIZE, avol; sb; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0))

Heuristic nonrecursive calls applied rule call right

And obtained the following new goals

Proof step 4:
avol[0] = mapped(buf), m0 = LEB_SIZE, m1 = EB_PAGE_SIZE, ebm-vol-inv(avol), is-encoded(sb0, buf) ⊦ ⟪let buf = mkbuf(m0) in {ebm_avol_read#(0, 0, 0, m0, avol; buf; err); if err = ESUCCESS then let m = ? in decode_superblock#(0, buf, m1; sb, m; err)}⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0)), # avol = 0

Rule argument

pos: right 1

Additional information

Used simplifier rules: read-superblock: ⊦ ;