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Proof step 87 from proof refine-readpage (previous step)

# buf0 = VFS_PAGE_SIZE, 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, ⌊err1⌋ , ¬ fs[ri[inodekey(m)]].directory, ¬ datakey(m, pageno) ∈ ri, asynced → boolvar2 ⊦ ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ ((asynced → boolvar2) ∧ err1 = err)

User applied rule exists right

And obtained the following new goals

Proof step 88:
# buf0 = VFS_PAGE_SIZE, 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, ⌊err1⌋ , asynced → boolvar2 ⊦ ⌊err1⌋ ∧ ⟨err := err1⟩ ((asynced → boolvar2) ∧ err1 = err), ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ ((asynced → boolvar2) ∧ err1 = err), fs[ri[inodekey(m)]].directory, datakey(m, pageno) ∈ ri

Rule argument

pos: right 1 terms: err1 abort: F discard: F computed: T

Additional information

Used terms: err1