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Proof step 24 from proof refine-allocate-gnd (previous step)

# lpt1 = # avol, # lpt0 = # avol, isbuf ↔ true, adr = adr0, istore = istore1, istore0 = istore2, keyset(gch) = gc-heap(lpt1, log1), log = log1, log0 = log1, maxino = m, ns = ns0, pstate = readonly, pstate0 = pstate, remove-refsize0(gstore0) = gstore0, remove-refsize0(istore1) = istore1, elems log1 ∩ ginval = ∅, dom gstore0 ∪ elems log1 = dom gstore ∪ ginval, ginval < # avol, abs-gstore(avol, lpt1, gstore, ginval), abs-istore(avol, lpt1, istore2), awbuf-inv(avol, bleb), bin-heap-inv(gch, lpt1), buf-ro-rw-mode(true, bleb, lpt1, avol), bufs-log-only(bleb, log1, lpt1), flash-lpt-cons(lpt0, istore1, gstore0), freelist-cons(lpt1, freelist), inv(gstore \ ginval), inv(gstore0), inv(istore2), inv(istore1), log-group-block(log1, lpt1), lpt-free-unref(lpt1), lpt-free-unref(lpt0), lpt-leb-size(lpt1), lpt-leb-size(lpt0), lpt-ram-flash(lpt1, lpt0, log1), synced(avol), istore1 ⊑ istore2 ⊦ ⟨if isbuf then if pstate = readonly then err := EROFS else {fail_or_success#(; ; err); if err = ESUCCESS then choose n with ¬ n ∈ gstore in gstore[n] := groupblock([], [], 0), log := log + n, ginval := ginval -- n, pstate := journal(n)} else abort⟩ ( abs-gstore(avol, lpt1, gstore, ginval) ∧ log = log0 ∧ ginval < # avol ∧ (pstate = unbuffered → bleb = nobuffer) ∧ (pstate = readonly ↔ pstate0 = readonly) ∧ (pstate ≠ unbuffered ∧ pstate ≠ readonly → bleb = buffered(pstate.lnum)) ∧ EROFS = err), dups(log1)

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Rule argument

pos: right 1

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