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Proof step 5 from proof inv-iget (previous step)

asynced1 ↔ asynced0, afs-cons(dirs, files), dcache-cons(dcache, dirs, files), icache-cons(icache, dirs, files), pcache-cons(pcache, dirs, files), synced(dirs, icache, pcache), asynced → synced(files, icache, pcache), ino ∈ dirs ∨ ino ∈ files ⊦ ⟪let asynced0 = false, asynced = false in {icache_get#(ino, icache; asynced0, inode, err); if ¬ asynced0 ∨ err ≠ ESUCCESS then {afs_iget#(ino, dirs, files, asynced1; inode, err); if err = ESUCCESS then icache_set#(inode, asynced; err, icache)}}⟫ (icache-cons(icache, dirs, files) ∧ synced(dirs, icache, pcache) ∧ (asynced → synced(files, icache, pcache)))

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Proof step 6:
asynced ↔ false, asynced0 ↔ false, asynced1 ↔ asynced3, afs-cons(dirs, files), dcache-cons(dcache, dirs, files), icache-cons(icache, dirs, files), pcache-cons(pcache, dirs, files), synced(dirs, icache, pcache), asynced2 → synced(files, icache, pcache), ino ∈ dirs ∨ ino ∈ files ⊦ ⟪icache_get#(ino, icache; asynced0, inode, err); if ¬ asynced0 ∨ err ≠ ESUCCESS then {afs_iget#(ino, dirs, files, asynced1; inode, err); if err = ESUCCESS then icache_set#(inode, asynced; err, icache)}⟫ (icache-cons(icache, dirs, files) ∧ synced(dirs, icache, pcache) ∧ (asynced2 → synced(files, icache, pcache)))

Proof step 5 from proof inv-iget (previous step)

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

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