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Proof step 17 from proof transaction-prefix-app (previous step)

(gndx0 + gndx1).head = mkgnode(nd0, m0, boolvar1, boolvar2), gndx0.head = mkgnode(nd1, m1, boolvar3, boolvar4), gndx0[n] = mkgnode(nd2, m2, boolvar5, boolvar6), gndx0[n0] = mkgnode(nd, m, boolvar, boolvar0), # gndx0 < # ndx, # gndx0 + # gndx1 < # ndx, ∀ n. n < # gndx0 + # gndx1 → (gndx0 + gndx1)[n].nd = ndx[n], gndx0 + gndx1 = [] ∨ boolvar1 ∧ (∀ n. (n ≠ 0 ∧ n < # gndx0 + # gndx1 → ¬ (gndx0 + gndx1)[n].start) ∧ (n < # gndx0 + # gndx1 → ¬ (gndx0 + gndx1)[n].end)) ⊦ gndx0 = [], ndx = [], boolvar3 ∧ (n ≠ 0 ∧ n < # gndx0 → ¬ boolvar5) ∧ (n < # gndx0 → ¬ boolvar6)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 18:
gndx0.head = mkgnode(nd1, m1, true, boolvar4), gndx0[n0] = mkgnode(nd, m, boolvar, boolvar0), gndx0[n] = mkgnode(nd2, m2, boolvar5, boolvar6), # gndx0 + # gndx1 < # ndx, # gndx0 < # ndx, ∀ n. (n ≠ 0 ∧ n < # gndx0 + # gndx1 → ¬ (gndx0 + gndx1)[n].start) ∧ (n < # gndx0 + # gndx1 → ¬ (gndx0 + gndx1)[n].end), ∀ n. n < # gndx0 + # gndx1 → (gndx0 + gndx1)[n].nd = ndx[n] ⊦ gndx0 + gndx1 = [], gndx0 = [], ndx = [], (n < # gndx0 → ¬ boolvar6) ∧ (n ≠ 0 ∧ n < # gndx0 → ¬ boolvar5)

Rule argument

Additional information

Used simplifier rules: ⊦ gndx + gndx0 = [] ↔ gndx = [] ∧ gndx0 = []; (as)%⊦ mkgnode(nd, m, boolvar, boolvar0) = mkgnode(nd0, m0, boolvar1, boolvar2) ↔ nd = nd0 ∧ m = m0 ∧ (boolvar ↔ boolvar1) ∧ (boolvar0 ↔ boolvar2); (ws)%a: ⊦ (gndx + gndx0) + gndx1 = gndx + gndx0 + gndx1; from specification list[group-store]% ⊦ gndx ≠ [] → (gndx + gndx0).head = gndx.head; (s)