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Proof step 78 from proof refine-read (previous step)

# buf2 = n4 + n3 + n2, # buf1 = # buf2, avols[default-volid][m2] = mapped(buf, n1), avol = abs(avols[default-volid]), buf0 = buf2, m = m1, m0 = m2, n = n2, n0 = n3, m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), range=(buf1, 0, buf2, 0, n3), range=(buf1, n3 + n2, buf2, n3 + n2, n4), default-volid ∈ avols, m1 + n2 ≤ LEB_SIZE, n3 + n2 ≤ # buf2, ⌊err0⌋ ⊦ ⟨if m0 < # avol ∧ avol[m0].mapped? ∧ n0 + n ≤ # buf0 ∧ m + n ≤ LEB_SIZE then {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} else abort⟩ (buf1 = buf0 ∧ err0 = err)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 79:
# buf1 = # buf2, # buf2 = n4 + n3 + n2, avols[default-volid][m2] = mapped(buf, n1), m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), range=(buf1, n3 + n2, buf2, n3 + n2, n4), range=(buf1, 0, buf2, 0, n3), default-volid ∈ avols, n3 + n2 ≤ # buf2, m1 + n2 ≤ LEB_SIZE, ⌊err0⌋ ⊦ ⟨if abs(avols[default-volid])[m2].mapped? then {fail_or_success#(; ; err); 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 choose buf with # buf = # buf2 ∧ range=(buf2, 0, buf, 0, n3) ∧ range=(buf2, n3 + n2, buf, n3 + n2, # buf2 - n3 + n2) in buf2 := buf} else abort⟩ (buf1 = buf2 ∧ err0 = err)

Rule argument

Additional information

Used simplifier rules: ⊦ # abs(evol) = # evol; (s)