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Proof step 25 from proof refine-read-ind (previous step)

# indx = # lax1 + # lax0 + 1, # lpt = # avol, # lpt0 = # avol, istore[m0] = indexblock(indx, lax1 + @(m1, m2) ' + lax0, m3), lpt[m0] = mklp(m3, m4, LP_INDEX_NODES, m5), avol[m0] = mapped(buf), ind = ind0, keyset(gch) = gc-heap(lpt, log1), remove-refsize0(gstore0) = gstore0, remove-refsize0(istore0) = istore0, elems log1 ∩ ginval = ∅, dom gstore0 ∪ elems log1 = dom gstore ∪ ginval, ginval < # avol, m0 < # avol, abs-gstore(avol, lpt, gstore, ginval), abs-nodes(buf, indx, lax1 + @(m1, m2) ' + lax0, m4 = LEB_SIZE), awbuf-inv(avol, bleb), bin-heap-inv(gch, lpt), buf-ro-rw-mode(pstate = readonly, bleb, lpt, avol), bufs-log-only(bleb, log1, lpt), flash-lpt-cons(lpt0, istore0, gstore0), freelist-cons(lpt, freelist), inv(indexblock(indx, lax1 + @(m1, m2) ' + lax0, m3)), inv(gstore \ ginval), inv(gstore0), inv(istore), inv(istore0), log-group-block(log1, lpt), lpt-free-unref(lpt), lpt-free-unref(lpt0), lpt-leb-size(lpt), lpt-leb-size(lpt0), lpt-ram-flash(lpt, lpt0, log1), m0 ∈ istore, istore0 ⊑ istore, m4 ≠ LEB_SIZE → m4 = # buf, isbuf → synced(avol), pstate = unbuffered → bleb = nobuffer, pstate ≠ unbuffered ∧ pstate ≠ readonly → bleb = buffered(pstate.lnum), pstate.journal? → log1 ≠ [] ∧ pstate.lnum = log1.last ∧ pstate.lnum ∈ gstore, pstate.index? → pstate.lnum ∈ istore, pstate = unbuffered → isbuf, abs-nodes(buf, indx, lax1 + @(m1, m2) ' + lax0, m4 = LEB_SIZE) → (∃ buf0, buf1, buf2, indx0, ind, indx1. indx = indx0 + ind ' + indx1 ∧ # indx0 = # lax1 ∧ buf = buf0 + buf1 + buf2 ∧ @(m1, m2) = @(# buf0, ind.flashsize) ∧ # buf1 = ind.flashsize ∧ abs-node(buf1, ind)) ⊦ ⟪persistence_read_ind#(@(m0, m1, m2), adr1, m, log1, avol, lpt0, ns0, bleb, pstate = readonly; ind; err)⟫ ⟨apersistence_read_ind#(@(m0, m1, m2), adr1, istore, istore0, ginval, gstore, gstore0, log1, m, ns0, pstate, isbuf; ind0; err0)⟩ ( (isbuf → synced(avol)) ∧ (pstate = unbuffered → bleb = nobuffer) ∧ (pstate ≠ unbuffered ∧ pstate ≠ readonly → bleb = buffered(pstate.lnum)) ∧ ind = ind0 ∧ err = err0), dups(log1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 26:
# indx1 = # lax0, # lpt = # avol, # lpt0 = # avol, # buf1 = 2 * NODE_HEADER_SIZE + ind1.alignedsize, # indx0 = # lax1, istore[m0] = indexblock(indx0 + ind1 ' + indx1, lax1 + @(# buf0, # buf1) ' + lax0, m3), lpt[m0] = mklp(m3, m4, LP_INDEX_NODES, m5), avol[m0] = mapped(buf0 + buf1 + buf2), ind = ind0, keyset(gch) = gc-heap(lpt, log1), remove-refsize0(gstore0) = gstore0, remove-refsize0(istore0) = istore0, elems log1 ∩ ginval = ∅, dom gstore0 ∪ elems log1 = dom gstore ∪ ginval, ginval < # avol, m0 < # avol, abs-gstore(avol, lpt, gstore, ginval), abs-node(buf1, ind1), abs-nodes(buf0 + buf1 + buf2, indx0 + ind1 ' + indx1, lax1 + @(# buf0, # buf1) ' + lax0, m4 = LEB_SIZE), awbuf-inv(avol, bleb), bin-heap-inv(gch, lpt), buf-ro-rw-mode(pstate = readonly, bleb, lpt, avol), bufs-log-only(bleb, log1, lpt), flash-lpt-cons(lpt0, istore0, gstore0), freelist-cons(lpt, freelist), inv(gstore \ ginval), inv(gstore0), inv(istore), inv(istore0), inv(indexblock(indx0 + ind1 ' + indx1, lax1 + @(# buf0, # buf1) ' + lax0, m3)), log-group-block(log1, lpt), lpt-free-unref(lpt), lpt-free-unref(lpt0), lpt-leb-size(lpt), lpt-leb-size(lpt0), lpt-ram-flash(lpt, lpt0, log1), m0 ∈ istore, istore0 ⊑ istore, ¬ dups(log1), isbuf → synced(avol), pstate = unbuffered → bleb = nobuffer, pstate ≠ unbuffered ∧ pstate ≠ readonly → bleb = buffered(pstate.lnum), pstate.journal? → log1 ≠ [] ∧ pstate.lnum = log1.last ∧ pstate.lnum ∈ gstore, pstate.index? → pstate.lnum ∈ istore, pstate = unbuffered → isbuf, m4 ≠ LEB_SIZE → m4 = # buf0 + # buf1 + # buf2 ⊦ ⟪persistence_read_ind#(@(m0, # buf0, # buf1), adr1, m, log1, avol, lpt0, ns0, bleb, pstate = readonly; ind; err)⟫ ⟨apersistence_read_ind# (@(m0, # buf0, # buf1), adr1, istore, istore0, ginval, gstore, gstore0, log1, m, ns0, pstate, isbuf; ind0; err0)⟩ ( (isbuf → synced(avol)) ∧ (pstate = unbuffered → bleb = nobuffer) ∧ (pstate ≠ unbuffered ∧ pstate ≠ readonly → bleb = buffered(pstate.lnum)) ∧ ind = ind0 ∧ err = err0)

Rule argument

Additional information

Used simplifier rules: ⊦ #(ladr ' + lax) = (# lax)+1; (s)% ⊦ #(lax + lax0) = # lax + # lax0; (s)%abs-nodes-elems-adr-length: ⊦ abs-nodes(buf, indx, lax, weak) → # indx = # lax; (forward) from specification abs-list[encoding-index-node]%fwd-inv-iblock: ⊦ inv(istore) ∧ n ∈ istore ∧ istore[n] = iblock → inv(iblock); (forward) from specification apersistence-base%append-a: ⊦ (buf + buf0) + buf1 = buf + buf0 + buf1; from specification array-splice[buffer]% ⊦ #(buf + buf0) = # buf + # buf0; (s)%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ m + n = m + n0 ↔ n = n0; (s)%a: ⊦ (indx + indx0) + indx1 = indx + indx0 + indx1; from specification list[index-store]% ⊦ m +1 = m + 1; (s)% ⊦ #(ind ' + indx) = (# indx)+1; (s)% ⊦ #(indx + indx0) = # indx + # indx0; (s)% ⊦ @(m, m0) = @(m1, m2) ↔ m = m1 ∧ m0 = m2; (ws)% ⊦ ind.flashsize = 2 * NODE_HEADER_SIZE + ind.alignedsize; (s)%a: ⊦ (lax + lax0) + lax1 = lax + lax0 + lax1; from specification list[laddress-list]