Build (method = -2) #dp: 34100 Step-3' Graph: 413 vertices and 1232 arcs (0.30s) Step-4' Graph: 47 vertices and 500 arcs (0.30s) #V4/#V3 = 0.11 #A4/#A3 = 0.41 Ready! (0.30s) Optimize a model with 172 rows, 501 columns and 1413 nonzeros Presolve removed 6 rows and 6 columns Presolve time: 0.01s Presolved: 166 rows, 495 columns, 1397 nonzeros Variable types: 0 continuous, 495 integer (197 binary) Found heuristic solution: objective 131.0000000 Optimize a model with 166 rows, 495 columns and 1397 nonzeros Presolved: 166 rows, 495 columns, 1397 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.340e+02 Factor NZ : 1.106e+03 Factor Ops : 1.396e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.15232699e+02 -7.96307256e+02 1.39e+02 2.85e-02 2.91e+00 0s 1 1.48829680e+02 -2.46360250e+02 8.53e-13 2.22e-16 3.92e-01 0s 2 7.91577913e+01 2.86561832e+01 2.79e-13 1.25e-16 4.91e-02 0s 3 6.67968200e+01 6.60981537e+01 1.01e-13 3.30e-16 6.68e-04 0s 4 6.66667968e+01 6.66660982e+01 2.95e-13 2.13e-16 6.68e-07 0s 5 6.66666667e+01 6.66666667e+01 1.91e-13 2.22e-16 6.68e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 6.66666667e+01 Root relaxation: objective 6.666667e+01, 340 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 4 131.00000 66.66667 49.1% - 0s H 0 0 67.0000000 66.66667 0.50% - 0s Explored 0 nodes (460 simplex iterations) in 0.02 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: 0.31 seconds Gurobi run time: 0.02 seconds Total run time: 0.33 seconds Objective: 67 Solution: 1 x [84, 125] 1 x [79, 82, 124] 1 x [8, 89, 123] 3 x [101, 112, 122] 2 x [24, 116, 121] 1 x [14, 14, 120] 1 x [87, 93, 119] 1 x [1, 8, 119] 1 x [74, 81, 118] 1 x [88, 94, 117] 1 x [2, 11, 117] 1 x [75, 75, 115] 2 x [27, 110, 114] 1 x [95, 108, 113] 1 x [73, 78, 111] 2 x [29, 107, 109] 1 x [91, 97, 106] 1 x [3, 18, 106] 1 x [100, 104, 105] 2 x [32, 99, 103] 1 x [72, 77, 102] 1 x [4, 19, 100] 1 x [71, 76, 98] 3 x [57, 70, 98] 1 x [61, 65, 96] 1 x [7, 22, 95] 2 x [38, 62, 92] 1 x [52, 59, 90] 1 x [9, 23, 89] 2 x [41, 55, 86] 1 x [50, 58, 85] 2 x [5, 10, 83] 2 x [13, 37, 80] 3 x [15, 54, 69] 2 x [24, 46, 68] 2 x [45, 51, 67] 2 x [26, 63, 66] 2 x [30, 49, 64] 1 x [43, 56, 60] 1 x [34, 42, 53] 1 x [33, 39, 48] 1 x [21, 36, 47] 1 x [20, 31, 44] 1 x [13, 25, 40] 1 x [6, 12, 35] 4 x [16, 17, 28]