Build (method = -2) #dp: 22828 Step-3' Graph: 2885 vertices and 8648 arcs (0.41s) Step-4' Graph: 623 vertices and 4124 arcs (0.42s) #V4/#V3 = 0.22 #A4/#A3 = 0.48 Ready! (0.42s) Optimize a model with 743 rows, 4125 columns and 11133 nonzeros Presolve removed 116 rows and 118 columns Presolve time: 0.04s Presolved: 627 rows, 4007 columns, 11001 nonzeros Variable types: 0 continuous, 4007 integer (3045 binary) Found heuristic solution: objective 99.0000000 Optimize a model with 627 rows, 4007 columns and 11001 nonzeros Presolved: 627 rows, 4007 columns, 11001 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 5.966e+03 Factor NZ : 2.483e+04 (roughly 2 MBytes of memory) Factor Ops : 1.620e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.27112434e+04 -2.22545719e+04 1.09e+05 3.54e-01 5.31e+01 0s 1 2.15958708e+03 -1.08275470e+04 1.78e+04 7.77e-16 9.25e+00 0s 2 4.48086102e+02 -3.33962797e+03 1.38e+03 1.55e-15 1.00e+00 0s 3 1.57760778e+02 -5.76250221e+02 2.47e+02 1.50e-15 1.77e-01 0s 4 1.00902701e+02 -1.00752899e+02 9.25e+01 9.71e-16 5.67e-02 0s 5 7.14960548e+01 -2.39312446e+01 2.54e+01 1.07e-15 1.90e-02 0s 6 6.26997562e+01 3.00894356e+01 5.25e+00 1.44e-15 4.99e-03 0s 7 6.10045810e+01 3.93241999e+01 3.00e+00 1.02e-15 3.11e-03 0s 8 5.76897882e+01 4.62083189e+01 5.84e-01 6.66e-16 1.50e-03 0s 9 5.59129962e+01 4.95262584e+01 2.38e-01 9.99e-16 8.22e-04 0s 10 5.49758865e+01 5.31137715e+01 9.85e-02 6.66e-16 2.43e-04 0s 11 5.45610716e+01 5.41989866e+01 2.17e-02 4.66e-16 4.74e-05 0s 12 5.44470978e+01 5.44388098e+01 3.50e-04 5.66e-16 1.07e-06 0s 13 5.44444445e+01 5.44444444e+01 2.44e-09 9.99e-16 6.22e-12 0s 14 5.44444444e+01 5.44444444e+01 5.64e-14 6.66e-16 6.21e-15 0s Barrier solved model in 14 iterations and 0.06 seconds Optimal objective 5.44444444e+01 Root relaxation: objective 5.444444e+01, 1754 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.44444 0 15 99.00000 54.44444 45.0% - 0s H 0 0 55.0000000 54.44444 1.01% - 0s Explored 0 nodes (2573 simplex iterations) in 0.25 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0% Preprocessing time: 0.45 seconds Gurobi run time: 0.25 seconds Total run time: 0.69 seconds Objective: 55 Solution: 1 x [56] 1 x [88, 105] 1 x [64] 1 x [51] 1 x [62] 1 x [26, 30] 1 x [10, 98] 1 x [15, 61] 1 x [112] 1 x [28, 82] 1 x [4, 33, 100] 1 x [54, 77] 1 x [87, 101] 1 x [13, 95] 1 x [21] 1 x [66, 80] 1 x [11, 69] 1 x [52, 85] 1 x [2, 103] 1 x [58, 108] 1 x [3, 72] 1 x [65, 93, 115] 1 x [27, 107] 1 x [8, 79, 113] 1 x [1, 71] 1 x [53, 94] 1 x [34, 89] 1 x [37, 74] 1 x [16, 50, 81] 1 x [5, 114] 1 x [97, 120] 1 x [43] 1 x [31, 75] 1 x [19, 44] 1 x [49, 57] 1 x [40, 110, 111] 1 x [67, 92] 1 x [24, 78, 99] 1 x [35, 48, 90] 1 x [91, 116] 1 x [14, 118] 1 x [12, 36, 104] 1 x [6, 73, 119] 1 x [47, 59, 84] 1 x [17, 106] 1 x [39, 46, 86] 1 x [55, 76] 1 x [42, 109] 1 x [20, 41, 70] 1 x [18, 83, 102] 1 x [25, 60, 68] 1 x [45, 96, 117] 1 x [7, 23, 32] 1 x [22, 38] 1 x [9, 29, 63]