Build (method = -2) #dp: 2004 Step-3' Graph: 71 vertices and 793 arcs (0.01s) Step-4' Graph: 55 vertices and 761 arcs (0.01s) #V4/#V3 = 0.77 #A4/#A3 = 0.96 Ready! (0.01s) Optimize a model with 109 rows, 762 columns and 2180 nonzeros Presolve removed 26 rows and 34 columns Presolve time: 0.02s Presolved: 83 rows, 728 columns, 1993 nonzeros Variable types: 0 continuous, 728 integer (334 binary) Found heuristic solution: objective 74.0000000 Found heuristic solution: objective 63.0000000 Optimize a model with 83 rows, 728 columns and 1993 nonzeros Presolved: 83 rows, 728 columns, 1993 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.048e+03 Factor NZ : 2.211e+03 Factor Ops : 7.685e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.16684877e+03 -3.59654803e+03 6.05e+03 2.41e-01 2.34e+01 0s 1 3.98787565e+02 -1.21101858e+03 1.11e+03 6.66e-16 4.53e+00 0s 2 1.13144405e+02 -3.97557244e+02 6.88e+01 1.55e-15 5.23e-01 0s 3 7.04764163e+01 -4.40145181e+01 4.86e+00 4.44e-16 8.52e-02 0s 4 5.57987750e+01 1.29361876e+01 1.21e+00 3.33e-16 3.02e-02 0s 5 4.97895752e+01 2.54422083e+01 3.39e-01 2.22e-16 1.68e-02 0s 6 4.67763437e+01 3.68568937e+01 1.31e-01 3.33e-16 6.79e-03 0s 7 4.59734194e+01 4.17573702e+01 7.62e-02 2.22e-16 2.88e-03 0s 8 4.49916269e+01 4.35965622e+01 1.37e-02 2.49e-16 9.50e-04 0s 9 4.46569192e+01 4.42471740e+01 3.78e-03 2.22e-16 2.79e-04 0s 10 4.45560599e+01 4.45234754e+01 4.97e-04 2.22e-16 2.22e-05 0s 11 4.45420413e+01 4.45409665e+01 6.22e-06 2.22e-16 7.31e-07 0s 12 4.45416670e+01 4.45416660e+01 4.93e-14 3.33e-16 7.31e-10 0s 13 4.45416667e+01 4.45416667e+01 4.45e-14 3.33e-16 7.31e-13 0s Barrier solved model in 13 iterations and 0.01 seconds Optimal objective 4.45416667e+01 Root relaxation: objective 4.454167e+01, 226 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.54167 0 29 63.00000 44.54167 29.3% - 0s H 0 0 46.0000000 44.54167 3.17% - 0s H 0 0 45.0000000 44.54167 1.02% - 0s Explored 0 nodes (357 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.04 seconds Total run time: 0.06 seconds Objective: 45 Solution: 1 x [16, 54] 2 x [17, 53] 1 x [18, 52] 1 x [15, 51] 2 x [16, 50] 2 x [20, 49] 1 x [14, 49] 1 x [21, 48] 1 x [19, 47] 1 x [23, 46] 3 x [27, 45] 1 x [25, 45] 1 x [22, 45] 1 x [21, 45] 1 x [19, 45] 2 x [23, 44] 1 x [28, 43] 1 x [24, 43] 1 x [42] 2 x [29, 41] 1 x [32, 40] 1 x [31, 40] 1 x [30, 40] 1 x [1, 9, 40] 1 x [3, 7, 40] 1 x [4, 6, 40] 1 x [30, 39] 1 x [3, 8, 39] 1 x [33, 38] 1 x [5, 8, 37] 1 x [6, 6, 37] 1 x [34, 36] 1 x [3, 10, 36] 1 x [2, 10, 35] 1 x [35, 35] 1 x [11, 12, 26] 1 x [13, 15, 22] 1 x [12, 15, 22]