[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 24 from proof refine-write (previous step)

LEB_SIZE = (n4 + n) + m1, avols[default-volid][m2] = mapped(buf0, n2), avol = abs(avols[default-volid]), m = m1, m0 = m2, n0 = n, n1 = n3, avol[m0].mapped?, m0 < # avol, m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(m, EB_PAGE_SIZE), is-aligned(n0, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), default-volid ∈ avols, # avol[m0].data ≤ m, m + n0 ≤ LEB_SIZE, n1 + n0 ≤ # buf, n2 ≤ LEB_SIZE, m1 ≤ LEB_SIZE, n2 ≤ m1, m1 + n ≤ LEB_SIZE, n3 + n ≤ # buf, n + m1 ≤ LEB_SIZE, m0 < # avol → m0 < # avol ∧ (avol[m0].mapped? → avol[m0].mapped? ∧ m0 < # avol) ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then if n0 ≠ 0 then avol[m0] := mapped(avol[m0].data + mkempbuf(m - # avol[m0].data) + subarray(buf, n1, n0)) else choose n with n < n0 ∧ is-aligned(n, EB_PAGE_SIZE) in if n ≠ 0 then avol[m0] := mapped(avol[m0].data + mkempbuf(m - # avol[m0].data) + subarray(buf, n1, n)) ifnone skip⟩ ( avol = abs(avols[default-volid][m2, mapped(subarray(avols[default-volid][m2].data, 0, m1) + subarray(buf, n3, n) + mkempbuf(n4), m1 + n)]) ∧ ESUCCESS = err), n = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 25:
LEB_SIZE = (n4 + n) + m1, avols[default-volid][m2] = mapped(buf0, n2), n ≠ 0, m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), default-volid ∈ avols, n + m1 ≤ LEB_SIZE, n2 ≤ m1, m1 ≤ LEB_SIZE, n2 ≤ LEB_SIZE, n3 + n ≤ # buf, m1 + n ≤ LEB_SIZE ⊦ ⟨fail_or_success#(; ; err); avol := abs(avols[default-volid]); if err = ESUCCESS then if n ≠ 0 then avol[m2] := mapped(avol[m2].data + mkempbuf(m1 - # avol[m2].data) + subarray(buf, n3, n)) else {n1 := n3; n2 := n; m0 := m2; m := m1; choose n with n < n2 ∧ is-aligned(n, EB_PAGE_SIZE) in if n ≠ 0 then avol[m0] := mapped(avol[m0].data + mkempbuf(m - # avol[m0].data) + subarray(buf, n1, n)) ifnone skip}⟩ ( avol = abs(avols[default-volid][m2, mapped(subarray(avols[default-volid][m2].data, 0, m1) + subarray(buf, n3, n) + mkempbuf(n4), m1 + n)]) ∧ ESUCCESS = err)

Rule argument

Additional information

Used simplifier rules: ⊦ # subarray(buf, m, n) = n; (s)% ⊦ mapped(buf).data = buf; (s)% ⊦ abs(mapped(buf, n)) = mapped(subarray(buf, 0, n)); (s)% ⊦ mapped(buf, m) = mapped(buf0, m0) ↔ buf = buf0 ∧ m = m0; (ws)%let: ⊦ n ≤ n0 ∧ n0 ≤ n1 → n ≤ n1; (forward) from specification nat% ⊦ abs(leb).mapped? ↔ (∃ buf, n. leb = mapped(buf, n)); (s)% ⊦ # abs(evol) = # evol; (s)% ⊦ n < # evol → abs(evol)[n] = abs(evol[n]); (s)