Build (method = -2) #dp: 103821 Step-3' Graph: 621 vertices and 1978 arcs (0.95s) Step-4' Graph: 131 vertices and 998 arcs (0.95s) #V4/#V3 = 0.21 #A4/#A3 = 0.50 Ready! (0.95s) Optimize a model with 267 rows, 999 columns and 2739 nonzeros Presolve removed 15 rows and 24 columns Presolve time: 0.02s Presolved: 252 rows, 975 columns, 2693 nonzeros Variable types: 0 continuous, 975 integer (437 binary) Found heuristic solution: objective 122.0000000 Optimize a model with 252 rows, 975 columns and 2693 nonzeros Presolved: 252 rows, 975 columns, 2693 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.296e+03 Factor NZ : 2.708e+03 Factor Ops : 4.433e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.05577606e+04 -4.49153772e+03 8.44e+03 1.66e-01 4.34e+01 0s 1 1.87089204e+03 -2.06958102e+03 1.17e+03 4.44e-16 6.72e+00 0s 2 3.28295669e+02 -7.24745081e+02 1.40e+02 7.77e-16 1.01e+00 0s 3 1.13583939e+02 -1.81368327e+02 1.16e+01 8.33e-16 1.69e-01 0s 4 6.59057273e+01 -3.15495145e+01 2.31e+00 4.44e-16 5.04e-02 0s 5 5.46993027e+01 2.47530411e+01 9.86e-01 2.22e-16 1.51e-02 0s 6 5.23726983e+01 4.48658493e+01 5.08e-01 2.22e-16 3.68e-03 0s 7 5.00278302e+01 4.98997701e+01 4.88e-03 2.32e-16 6.29e-05 0s 8 5.00000254e+01 4.99998998e+01 1.89e-13 3.33e-16 6.29e-08 0s 9 5.00000000e+01 5.00000000e+01 2.63e-13 2.22e-16 6.29e-14 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 628 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (684 simplex iterations) in 0.06 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.96 seconds Gurobi run time: 0.06 seconds Total run time: 1.02 seconds Objective: 50 Solution: 2 x [9, 69, 99, 136] 1 x [103, 109, 134, 135] 1 x [2, 128, 129, 135] 1 x [14, 14, 101, 135] 1 x [7, 123, 133, 133] 1 x [5, 103, 123, 132] 1 x [1, 126, 130, 131] 1 x [77, 115, 127, 131] 1 x [10, 97, 123, 131] 1 x [12, 79, 124, 125] 1 x [26, 26, 98, 123] 2 x [22, 56, 59, 122] 1 x [63, 63, 85, 121] 1 x [75, 102, 117, 120] 1 x [74, 90, 116, 119] 1 x [76, 76, 84, 118] 2 x [23, 40, 45, 114] 1 x [79, 96, 112, 113] 1 x [97, 104, 110, 111] 3 x [70, 82, 94, 108] 1 x [73, 86, 95, 107] 1 x [66, 72, 92, 106] 1 x [61, 61, 81, 105] 1 x [11, 25, 77, 104] 3 x [78, 87, 90, 100] 1 x [4, 15, 29, 96] 2 x [18, 30, 43, 93] 1 x [89, 91, 91, 91] 1 x [62, 71, 88, 90] 1 x [60, 68, 80, 83] 1 x [50, 57, 65, 67] 1 x [48, 49, 54, 64] 2 x [24, 38, 39, 58] 1 x [41, 46, 53, 55] 1 x [33, 37, 38, 52] 2 x [31, 32, 44, 51] 1 x [20, 27, 36, 47] 1 x [13, 21, 28, 42] 1 x [6, 16, 19, 35] 1 x [3, 8, 17, 34]