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Proof step 7 from proof read-loop-inv (previous step)

buf = mkbuf(VFS_PAGE_SIZE), buf0 = buf1, err = ESUCCESS, ino = (ino2 + ino0) % VFS_PAGE_SIZE, ino0 = n, ino1 = n1, ino2 = n0, ¬ isdir, pageno = (ino2 + ino0) / VFS_PAGE_SIZE, read-inv(n0, n1, inode, buf2, buf1, n, dirs, files), read-inv(n0, n1, inode, buf2, buf3, n2, dirs, files) ⊦ [let n = min(ino1 - ino2 + ino0, VFS_PAGE_SIZE - ino, inode.size - ino2 + ino0) in if n ≠ 0 then {afs_readpage#(inode, pageno, dirs, files, asynced; buf, err); if err = ESUCCESS then {buf0 := copy(buf, ino, buf0, ino0, n); ino0 := ino0 + n}} else isdir := true] read-inv(n0, n1, inode, buf2, buf0, ino0, dirs, files), VFS_PAGE_SIZE = 0

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Proof step 8:
buf = mkbuf(VFS_PAGE_SIZE), buf0 = buf1, err = ESUCCESS, ino = (ino2 + ino0) % VFS_PAGE_SIZE, ino0 = n3, ino1 = n1, ino2 = n0, ¬ isdir, n = min(ino1 - ino2 + ino0, VFS_PAGE_SIZE - ino, inode.size - ino2 + ino0), pageno = (ino2 + ino0) / VFS_PAGE_SIZE, read-inv(n0, n1, inode, buf2, buf3, n2, dirs, files), read-inv(n0, n1, inode, buf2, buf1, n3, dirs, files), ino1 ≥ ino2 + ino0, VFS_PAGE_SIZE ≥ ino, inode.size ≥ ino2 + ino0 ⊦ [if n ≠ 0 then {afs_readpage#(inode, pageno, dirs, files, asynced; buf, err); if err = ESUCCESS then {buf0 := copy(buf, ino, buf0, ino0, n); ino0 := ino0 + n}} else isdir := true] read-inv(n0, n1, inode, buf2, buf0, ino0, dirs, files), VFS_PAGE_SIZE = 0

Proof step 7 from proof read-loop-inv (previous step)

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

Additional information