Build (method = -2) #dp: 1163 Step-3' Graph: 51 vertices and 366 arcs (0.00s) Step-4' Graph: 39 vertices and 342 arcs (0.00s) #V4/#V3 = 0.76 #A4/#A3 = 0.93 Ready! (0.00s) Optimize a model with 94 rows, 343 columns and 956 nonzeros Presolve removed 36 rows and 44 columns Presolve time: 0.00s Presolved: 58 rows, 299 columns, 814 nonzeros Variable types: 0 continuous, 299 integer (84 binary) Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 73.0000000 Optimize a model with 58 rows, 299 columns and 814 nonzeros Presolved: 58 rows, 299 columns, 814 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.490e+02 Factor NZ : 9.450e+02 Factor Ops : 1.780e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.22862247e+02 -1.07142548e+03 1.34e+03 3.35e-01 1.26e+01 0s 1 2.02597004e+02 -4.68154004e+02 1.78e+02 4.44e-16 2.21e+00 0s 2 9.69528186e+01 -6.01843124e+01 1.77e+01 4.44e-16 3.22e-01 0s 3 7.09430248e+01 2.76259028e+01 5.95e-01 4.72e-16 7.17e-02 0s 4 6.28605082e+01 4.40980296e+01 1.65e-01 3.05e-16 3.08e-02 0s 5 5.89202077e+01 5.36583554e+01 7.55e-02 3.90e-16 8.64e-03 0s 6 5.75123653e+01 5.62256063e+01 2.00e-02 3.33e-16 2.10e-03 0s 7 5.70272959e+01 5.69224667e+01 9.93e-04 4.44e-16 1.71e-04 0s 8 5.70000283e+01 5.69999228e+01 1.63e-13 5.55e-16 1.72e-07 0s 9 5.70000000e+01 5.70000000e+01 7.69e-14 2.22e-16 1.72e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 5.70000000e+01 Root relaxation: objective 5.700000e+01, 163 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 57.0000000 57.00000 0.0% - 0s Explored 0 nodes (163 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 57 Solution: 2 x [55] 2 x [54] 3 x [53] 1 x [52] 1 x [51] 1 x [50] 2 x [49] 1 x [1, 48] 1 x [1, 47] 1 x [46] 1 x [2, 46] 1 x [45] 2 x [4, 44] 2 x [3, 43] 2 x [6, 42] 1 x [7, 41] 1 x [5, 41] 1 x [4, 40] 1 x [8, 39] 1 x [3, 39] 1 x [9, 38] 1 x [9, 37] 2 x [12, 36] 1 x [13, 35] 2 x [14, 34] 1 x [15, 33] 2 x [13, 32] 1 x [17, 31] 3 x [16, 31] 1 x [19, 30] 2 x [19, 29] 1 x [13, 28] 1 x [23, 27] 2 x [21, 26] 2 x [20, 25] 1 x [10, 25] 1 x [9, 24] 1 x [10, 23] 2 x [18, 22] 1 x [11, 22]