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Proof step 27 from proof inv-add-gnds (previous step)

# lpt1 = # avol, # lpt0 = # avol, avol[n] = mapped(buf), lpt1[n] = mklp(m4, m1, LP_GROUP_NODES, m2), keyset(gch) = gc-heap(lpt1, log0), gndx ≠ [], n < # avol, awbuf-inv(avol, buffered(n)), bin-heap-inv(gch, lpt1), buf-ro-rw-mode(false, buffered(n), lpt1, avol), bufs-log-only(buffered(n), log0, lpt1), freelist-cons(lpt1, freelist), log-group-block(log0, lpt1), lpt-free-unref(lpt1), lpt-free-unref(lpt0), lpt-leb-size(lpt1), lpt-leb-size(lpt0), lpt-ram-flash(lpt1, lpt0, log0), n ∈ log0, ¬ dups(log0), m1 + gndx.flashsize ≤ LEB_SIZE → m1 = # buf, err = ESUCCESS → lax.to-adr(n) = ax ∧ # buf0 = gndx.flashsize ∧ abs-nodes(buf0, m1, gndx, lax, false), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪isbuf1 := false; bleb1 := buffered(n); if err = ESUCCESS then if ¬ m1 + # buf0 ≤ LEB_SIZE then {debug#("persistence: trying to write beyond LEB size"); awbuf_enter_readonly#(adr, m, log0, avol, lpt0, ns, bleb1; ; isbuf1); err := ENOSPC} else {awbuf_write_buf#(# buf0, buf0, adr, m, log0, lpt0, ns, bleb1; avol, isbuf1; err); if err = ESUCCESS then lpt1[buffered(n).leb] := mklp (lpt1[buffered(n).leb].ref-size, lpt1[buffered(n).leb].size + # buf0, lpt1[buffered(n).leb].flags, lpt1[buffered(n).leb].gcheapidx) else {debug#("persistence: adding group node to LEB " + buffered(n).leb.toString + " failed"); lpt1[buffered(n).leb] := mklp(lpt1[buffered(n).leb].ref-size, LEB_SIZE, lpt1[buffered(n).leb].flags, lpt1[buffered(n).leb].gcheapidx)}} else {debug#("persistence: could not encode group node"); awbuf_enter_readonly#(adr, m, log0, avol, lpt0, ns, bleb1; ; isbuf1)}⟫ ( lpt-free-unref(lpt1) ∧ freelist-cons(lpt1, freelist) ∧ bin-heap-inv(gch, lpt1) ∧ keyset(gch) = gc-heap(lpt1, log0) ∧ bufs-log-only(bleb1, log0, lpt1) ∧ # lpt1 = # avol ∧ log-group-block(log0, lpt1) ∧ buf-ro-rw-mode(isbuf1, bleb1, lpt1, avol) ∧ lpt-leb-size(lpt1) ∧ lpt-ram-flash(lpt1, lpt0, log0) ∧ awbuf-inv(avol, bleb1) ∧ # lpt0 = # avol)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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