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Proof step 6 from proof refine-readpage (previous step)

# buf0 = VFS_PAGE_SIZE, boolvar0 ↔ boolvar, buf = buf0, err = err0, inode = mkinode(m, md, boolvar1, m0, m1, m2), ro = orphans(fs, ri), orphans(fs, ri).inodes?, fo.inodes?, afs-cons(abs-dirs(fs, ri), abs-files(fs, ri)), file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, orphans(fs, ri)), replay-cons-strong(fs, ri, orphans(fs, ri), fi, fo, log), ri-inj(ri), ri-inj(fi), ubifs-cons(fs, ri, orphans(fs, ri), fi, fo, log), inodekey(m) ∈ ri, asynced → boolvar ⊦ ⟪if pre-readpage(inode, pageno, buf, fs, ri) then choose key, boolvar, nd with true in {err := ESUCCESS; key := datakey(inode.ino, pageno); aubifs_core_index_lookup#(key, ri, fi, ro, fo, fs, log, boolvar0; boolvar, nd; err); if err = ESUCCESS then if boolvar then buf := copy(nd.data, 0, buf, 0, VFS_PAGE_SIZE) else buf := fill(buf, zero)} else abort⟫ ⟨afs_readpage#(mkinode(m, md, boolvar1, m0, m1, m2), pageno, abs-dirs(fs, ri), abs-files(fs, ri), asynced; buf0, err0)⟩ ((asynced → boolvar) ∧ buf = buf0 ∧ err = err0), fs[ri[inodekey(m)]].directory

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 7:
# buf0 = VFS_PAGE_SIZE, boolvar0 ↔ boolvar, buf = buf0, err = err0, inode = mkinode(m, md, boolvar1, m0, m1, m2), ro = orphans(fs, ri), fo.inodes?, orphans(fs, ri).inodes?, afs-cons(abs-dirs(fs, ri), abs-files(fs, ri)), file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, orphans(fs, ri)), replay-cons-strong(fs, ri, orphans(fs, ri), fi, fo, log), ri-inj(fi), ri-inj(ri), ubifs-cons(fs, ri, orphans(fs, ri), fi, fo, log), inodekey(m) ∈ ri, asynced → boolvar ⊦ ⟪choose key, boolvar, nd with true in {err := ESUCCESS; key := datakey(inode.ino, pageno); aubifs_core_index_lookup#(key, ri, fi, ro, fo, fs, log, boolvar0; boolvar, nd; err); if err = ESUCCESS then if boolvar then buf := copy(nd.data, 0, buf, 0, VFS_PAGE_SIZE) else buf := fill(buf, zero)}⟫ ⟨afs_readpage#(mkinode(m, md, boolvar1, m0, m1, m2), pageno, abs-dirs(fs, ri), abs-files(fs, ri), asynced; buf0, err0)⟩ ((asynced → boolvar) ∧ buf = buf0 ∧ err = err0), fs[ri[inodekey(m)]].directory

Rule argument

pos: right 1

Additional information

Used simplifier rules: ⊦ pre-readpage(inode, n, buf, fs, ri) ↔ valid-file-ino(inode.ino, fs, ri) ∧ # buf = VFS_PAGE_SIZE; (s)% ⊦ mkinode(m, md, boolvar, m0, m1, m2).ino = m; (s)%⊦ valid-file-ino(ino, fs, ri) ↔ inodekey(ino) ∈ ri ∧ ¬ fs[ri[inodekey(ino)]].directory; (s)