Build (method = -2) #dp: 1396 Step-3' Graph: 93 vertices and 270 arcs (0.01s) Step-4' Graph: 11 vertices and 106 arcs (0.01s) #V4/#V3 = 0.12 #A4/#A3 = 0.39 Ready! (0.01s) Optimize a model with 40 rows, 107 columns and 305 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 37 rows, 104 columns, 298 nonzeros Variable types: 0 continuous, 104 integer (48 binary) Found heuristic solution: objective 34.0000000 Found heuristic solution: objective 33.0000000 Optimize a model with 37 rows, 104 columns and 298 nonzeros Presolved: 37 rows, 104 columns, 298 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.110e+02 Factor NZ : 4.230e+02 Factor Ops : 7.135e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.10916105e+02 -1.21455453e+02 1.89e+01 2.68e-02 2.08e+00 0s 1 2.66880585e+01 -3.63846660e+01 2.84e-14 2.22e-16 2.99e-01 0s 2 1.75900446e+01 1.28985002e+01 1.29e-14 2.22e-16 2.15e-02 0s 3 1.66872877e+01 1.66423663e+01 4.25e-14 2.22e-16 2.04e-04 0s 4 1.66666873e+01 1.66666424e+01 7.66e-15 2.22e-16 2.04e-07 0s 5 1.66666667e+01 1.66666667e+01 2.61e-14 1.57e-16 2.13e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 3 33.00000 16.66667 49.5% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (102 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 17 Solution: 1 x [5, 25, 28] 1 x [2, 4, 4] 2 x [3, 14, 24] 2 x [1, 13, 21] 3 x [7, 26, 29] 1 x [23, 27] 1 x [18, 19, 22] 3 x [6, 10, 21] 1 x [12, 16, 20] 1 x [9, 15, 17] 1 x [7, 8, 11]