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Proof step 19 from proof refine-read (previous step)

avols[default-volid][m2] = mapped(buf1, n1), avol = abs(avols[default-volid]), buf = buf2, buf0 = buf2, m = m1, m0 = m2, n = n2, n0 = n3, avol[m0].mapped?, m0 < # avol, m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols, n0 + n ≤ # buf0, m + n ≤ LEB_SIZE, m1 + n2 ≤ LEB_SIZE, n3 + n2 ≤ # buf2, m0 < # avol → m0 < # avol ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then buf0 := copy(avol[m0].data + mkempbuf(LEB_SIZE - # avol[m0].data), m, buf0, n0, n) else choose buf with # buf = # buf0 ∧ range=(buf0, 0, buf, 0, n0) ∧ range=(buf0, n0 + n, buf, n0 + n, # buf0 - n0 + n) in buf0 := buf⟩ (copy(avols[default-volid][m2].data, m1, buf, n3, n2) = buf0 ∧ ESUCCESS = err)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
avols[default-volid][m2] = mapped(buf1, n1), m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols, m1 + n2 ≤ LEB_SIZE, n3 + n2 ≤ # buf2 ⊦ ⟨fail_or_success#(; ; err); buf1 := buf2; if err = ESUCCESS then buf2 := copy(abs(avols[default-volid])[m2].data + mkempbuf(LEB_SIZE - # abs(avols[default-volid])[m2].data), m1, buf2, n3, n2) else {n0 := n3; n1 := n2; choose buf with # buf = # buf2 ∧ range=(buf2, 0, buf, 0, n0) ∧ range=(buf2, n0 + n1, buf, n0 + n1, # buf2 - n0 + n1) in buf2 := buf}⟩ (copy(avols[default-volid][m2].data, m1, buf1, n3, n2) = buf2 ∧ ESUCCESS = err)

Rule argument

Additional information

Used simplifier rules: ⊦ mapped(buf, m) = mapped(buf0, m0) ↔ buf = buf0 ∧ m = m0; (ws)% ⊦ abs(leb).mapped? ↔ (∃ buf, n. leb = mapped(buf, n)); (s)% ⊦ n < # evol → abs(evol)[n] = abs(evol[n]); (s)% ⊦ # abs(evol) = # evol; (s)