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Proof step 53 from proof prepost-read-superblock (previous step)

avol[0] = mapped(buf1), buf = mkbuf(LEB_SIZE), err = err0, n0 = 0, ebm-vol-inv(avol), is-encoded(sb0, buf1), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪m2 := LEB_SIZE; choose buf1 with # buf1 = # buf ∧ range=(buf, 0, buf1, 0, n0) ∧ range=(buf, n0 + m2, buf1, n0 + m2, # buf - n0 + m2) in buf := buf1; if err = ESUCCESS then let m = ? in decode_superblock#(0, buf, EB_PAGE_SIZE; sb, m; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0)), # avol = 0, err = ESUCCESS

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 54:
avol[0] = mapped(buf1), buf = mkbuf(LEB_SIZE), err = err0, m2 = LEB_SIZE, n0 = 0, ebm-vol-inv(avol), is-encoded(sb0, buf1), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪choose buf1 with # buf1 = # buf ∧ range=(buf, 0, buf1, 0, n0) ∧ range=(buf, n0 + m2, buf1, n0 + m2, # buf - n0 + m2) in buf := buf1; if err = ESUCCESS then let m = ? in decode_superblock#(0, buf, EB_PAGE_SIZE; sb, m; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0)), # avol = 0, err = ESUCCESS

Proof step 53 from proof prepost-read-superblock (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information