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Proof step 11 from proof eq-io-readpage (previous step)

⟨afs_readpage#(mkinode(m, md, boolvar, m0, m1, m2), pageno0, dirs1, files1, asynced0; buf, err)⟩ (buf = buf0 ∧ err = err0), # buf = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), m ∈ files1 ⊦ ⟨choose err0 with ⌊err0⌋ in err := err0⟩ (buf = buf0 ∧ err = err0), ⟨if pageno0 ∈ content then buf := content[pageno0] else buf := zeropage; err := ESUCCESS⟩ (buf = buf0 ∧ err = err0)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 12:
⟨afs_readpage#(mkinode(m, md, boolvar, m0, m1, m2), pageno0, dirs1, files1, asynced0; buf, err)⟩ (buf = buf0 ∧ err = err1), # buf = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), m ∈ files1 ⊦ ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ (buf = buf0 ∧ err = err1), ⟨if pageno0 ∈ content then buf := content[pageno0] else buf := zeropage; err := ESUCCESS⟩ (buf = buf0 ∧ err = err1)

Proof step 11 from proof eq-io-readpage (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information