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Proof step 16 from proof inv-readpage (previous step)

# buf = VFS_PAGE_SIZE, fo.inodes?, ro.inodes?, file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, ro), replay-cons-strong(fs, ri, ro, fi, fo, log), ri-inj(fi), ri-inj(ri), ubifs-cons(fs, ri, ro, fi, fo, log), inodekey(m) ∈ ri, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err := err0; if err = ESUCCESS then {boolvar := datakey(m, pageno) ∈ ri; if boolvar then nd := fs[ri[datakey(m, pageno)]] else nd := ?} else boolvar := ?, nd := ?; if err = ESUCCESS then if boolvar then buf := copy(nd.data, 0, buf, 0, VFS_PAGE_SIZE) else buf := fill(buf, zero)⟫ true, fs[ri[inodekey(m)]].directory

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 17:
# buf = VFS_PAGE_SIZE, err = err0, ro.inodes?, fo.inodes?, file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, ro), replay-cons-strong(fs, ri, ro, fi, fo, log), ri-inj(ri), ri-inj(fi), ubifs-cons(fs, ri, ro, fi, fo, log), inodekey(m) ∈ ri, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪if err = ESUCCESS then {boolvar := datakey(m, pageno) ∈ ri; if boolvar then nd := fs[ri[datakey(m, pageno)]] else nd := ?} else boolvar := ?, nd := ?; if err = ESUCCESS then if boolvar then buf := copy(nd.data, 0, buf, 0, VFS_PAGE_SIZE) else buf := fill(buf, zero)⟫ true, fs[ri[inodekey(m)]].directory

Proof step 16 from proof inv-readpage (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information