Build (method = -2) #dp: 68997 Step-3' Graph: 459 vertices and 1576 arcs (0.46s) Step-4' Graph: 80 vertices and 818 arcs (0.47s) #V4/#V3 = 0.17 #A4/#A3 = 0.52 Ready! (0.47s) Optimize a model with 235 rows, 819 columns and 2301 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.01s Presolved: 225 rows, 809 columns, 2296 nonzeros Variable types: 0 continuous, 809 integer (497 binary) Found heuristic solution: objective 83.0000000 Optimize a model with 225 rows, 809 columns and 2296 nonzeros Presolved: 225 rows, 809 columns, 2296 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.181e+03 Factor NZ : 2.897e+03 Factor Ops : 5.826e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.06396247e+04 -8.25514012e+03 8.31e+03 1.33e-01 6.62e+01 0s 1 3.29739686e+03 -2.56412215e+03 1.08e+03 4.44e-16 9.39e+00 0s 2 3.60627264e+02 -5.05458679e+02 8.31e+01 5.55e-16 9.27e-01 0s 3 1.15024665e+02 -1.00503851e+02 5.97e+00 5.55e-16 1.46e-01 0s 4 7.38911241e+01 8.70483040e+00 7.83e-01 2.22e-16 3.99e-02 0s 5 6.98074566e+01 5.83269356e+01 3.81e-01 2.22e-16 6.70e-03 0s 6 6.66923212e+01 6.64820729e+01 1.00e-03 4.44e-16 1.26e-04 0s 7 6.66666669e+01 6.66666650e+01 1.00e-08 2.22e-16 1.15e-09 0s 8 6.66666667e+01 6.66666667e+01 2.87e-12 2.22e-16 1.15e-12 0s Barrier solved model in 8 iterations and 0.01 seconds Optimal objective 6.66666667e+01 Root relaxation: objective 6.666667e+01, 533 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.66667 0 4 83.00000 66.66667 19.7% - 0s H 0 0 67.0000000 66.66667 0.50% - 0s Explored 0 nodes (639 simplex iterations) in 0.05 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.700000000000e+01, best bound 6.700000000000e+01, gap 0.0% Preprocessing time: 0.48 seconds Gurobi run time: 0.05 seconds Total run time: 0.52 seconds Objective: 67 Solution: 1 x [98, 99, 155] 1 x [7, 130, 154] 1 x [17, 127, 153] 1 x [10, 129, 152] 3 x [34, 103, 152] 1 x [104, 131, 151] 2 x [37, 47, 150] 1 x [49, 68, 149] 1 x [26, 122, 148] 2 x [23, 132, 147] 1 x [60, 146] 1 x [24, 123, 145] 1 x [6, 142, 144] 1 x [2, 139, 143] 1 x [4, 134, 142] 1 x [1, 135, 141] 1 x [3, 137, 140] 2 x [22, 138, 138] 1 x [18, 125, 136] 1 x [32, 121, 133] 1 x [13, 128, 131] 1 x [88, 97, 126] 1 x [20, 124, 124] 1 x [33, 71, 120] 1 x [14, 36, 119] 1 x [15, 38, 118] 1 x [46, 117, 117] 1 x [16, 51, 116] 1 x [84, 95, 115] 1 x [27, 53, 114] 1 x [29, 54, 113] 1 x [31, 56, 112] 1 x [70, 94, 111] 1 x [35, 61, 110] 1 x [43, 63, 109] 1 x [45, 66, 108] 1 x [55, 72, 107] 1 x [71, 105, 106] 1 x [25, 25, 102] 1 x [58, 58, 101] 1 x [69, 69, 100] 2 x [65, 91, 96] 1 x [67, 92, 93] 1 x [62, 86, 90] 1 x [52, 83, 89] 1 x [39, 80, 87] 1 x [28, 79, 85] 1 x [19, 77, 82] 1 x [11, 76, 81] 2 x [39, 75, 78] 1 x [8, 65, 74] 1 x [5, 64, 73] 2 x [9, 48, 59] 2 x [30, 40, 57] 2 x [21, 41, 50] 2 x [12, 42, 44]