Build (method = -2) #dp: 9058 Step-3' Graph: 316 vertices and 3631 arcs (0.09s) Step-4' Graph: 211 vertices and 3335 arcs (0.09s) #V4/#V3 = 0.67 #A4/#A3 = 0.92 Ready! (0.09s) Optimize a model with 256 rows, 3336 columns and 9590 nonzeros Presolve removed 10 rows and 12 columns Presolve time: 0.05s Presolved: 246 rows, 3324 columns, 9586 nonzeros Variable types: 0 continuous, 3324 integer (564 binary) Found heuristic solution: objective 107.0000000 Found heuristic solution: objective 95.0000000 Optimize a model with 246 rows, 3324 columns and 9586 nonzeros Presolved: 246 rows, 3324 columns, 9586 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.384e+03 Factor NZ : 1.285e+04 (roughly 2 MBytes of memory) Factor Ops : 8.727e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.03105893e+03 -6.27181099e+04 4.96e+04 2.25e-01 1.08e+02 0s 1 2.03344045e+03 -1.76332935e+04 9.75e+03 2.22e-15 2.14e+01 0s 2 5.81041494e+02 -7.96144949e+03 1.40e+03 2.55e-15 3.78e+00 0s 3 2.92821662e+02 -2.60740507e+03 2.22e+02 4.44e-15 7.32e-01 0s 4 1.49272369e+02 -5.13542123e+02 4.42e+01 2.22e-15 1.40e-01 0s 5 1.20396264e+02 -2.19314777e+02 2.42e+01 2.22e-15 6.73e-02 0s 6 1.12761071e+02 -1.53358639e+02 1.98e+01 1.78e-15 5.12e-02 0s 7 9.76477813e+01 -1.22740373e+02 1.14e+01 2.44e-15 3.90e-02 0s 8 7.84991923e+01 -6.43928409e+01 7.45e+00 1.78e-15 2.49e-02 0s 9 4.86563534e+01 -2.82285539e+01 3.28e+00 1.78e-15 1.28e-02 0s 10 3.18312082e+01 -2.10200742e+01 1.55e+00 1.71e-15 8.49e-03 0s 11 2.83153433e+01 -6.16256471e+00 1.06e+00 1.45e-15 5.47e-03 0s 12 2.71412585e+01 6.15987321e+00 7.60e-01 1.34e-15 3.30e-03 0s 13 2.59029208e+01 1.26955251e+01 4.46e-01 1.38e-15 2.04e-03 0s 14 2.39356647e+01 1.72841498e+01 2.16e-01 2.00e-15 1.02e-03 0s 15 2.27462854e+01 1.96995913e+01 1.12e-01 1.78e-15 4.64e-04 0s 16 2.14448731e+01 2.07732004e+01 5.28e-03 1.45e-15 1.01e-04 0s 17 2.13658716e+01 2.10009969e+01 3.10e-03 1.33e-15 5.48e-05 0s 18 2.12991988e+01 2.11239165e+01 1.26e-03 1.78e-15 2.63e-05 0s 19 2.12716722e+01 2.12034346e+01 5.72e-04 2.00e-15 1.02e-05 0s 20 2.12660444e+01 2.12311630e+01 4.45e-04 1.17e-15 5.25e-06 0s 21 2.12459532e+01 2.12446529e+01 8.14e-06 1.50e-15 1.95e-07 0s 22 2.12454569e+01 2.12454491e+01 2.98e-08 1.32e-15 1.17e-09 0s 23 2.12454545e+01 2.12454545e+01 7.37e-14 1.78e-15 1.17e-12 0s Barrier solved model in 23 iterations and 0.08 seconds Optimal objective 2.12454545e+01 Root relaxation: objective 2.124545e+01, 1261 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 21.24545 0 68 95.00000 21.24545 77.6% - 0s H 0 0 23.0000000 21.24545 7.63% - 0s H 0 0 22.0000000 21.24545 3.43% - 0s Explored 0 nodes (2382 simplex iterations) in 0.50 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0% Preprocessing time: 0.12 seconds Gurobi run time: 0.50 seconds Total run time: 0.62 seconds Objective: 22 Solution: 1 x [34, 35, 39, 41, 45] 2 x [32, 36, 37, 42, 44] 2 x [24, 35, 36, 39, 44] 1 x [38, 39, 41, 41, 43] 1 x [32, 33, 38, 38, 42] 1 x [26, 38, 39, 40] 1 x [1, 4, 13, 14, 19, 36] 1 x [4, 5, 15, 17, 21, 31] 1 x [4, 4, 16, 28, 30] 1 x [6, 7, 8, 20, 23, 30] 1 x [7, 12, 13, 13, 18, 30] 1 x [3, 3, 10, 20, 26, 29] 1 x [6, 6, 8, 22, 24, 27] 1 x [6, 7, 22, 24, 27] 1 x [2, 14, 17, 17, 26] 1 x [4, 5, 16, 21, 22, 25] 2 x [7, 11, 15, 19, 19, 23] 1 x [9, 9, 15, 18, 19, 19] 1 x [13, 14, 15, 17, 17, 18]