Build (method = -2) #dp: 426 Step-3' Graph: 23 vertices and 121 arcs (0.00s) Step-4' Graph: 19 vertices and 113 arcs (0.00s) #V4/#V3 = 0.83 #A4/#A3 = 0.93 Ready! (0.00s) Optimize a model with 72 rows, 114 columns and 308 nonzeros Presolve removed 49 rows and 54 columns Presolve time: 0.00s Presolved: 23 rows, 60 columns, 152 nonzeros Variable types: 0 continuous, 60 integer (12 binary) Found heuristic solution: objective 92.0000000 Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 77.0000000 Optimize a model with 23 rows, 60 columns and 152 nonzeros Presolve removed 1 rows and 1 columns Presolved: 22 rows, 59 columns, 150 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.500e+01 Factor NZ : 1.730e+02 Factor Ops : 1.635e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.18192190e+02 -1.87898914e+02 1.68e+02 2.29e-01 1.42e+01 0s 1 1.63165141e+02 -3.36382799e+01 2.87e+01 2.22e-16 2.73e+00 0s 2 9.23483373e+01 5.52499951e+01 1.64e+00 5.55e-16 3.27e-01 0s 3 7.96093232e+01 6.79051598e+01 3.46e-02 4.44e-16 9.47e-02 0s 4 7.71737213e+01 7.64600730e+01 1.16e-03 3.33e-16 5.76e-03 0s Barrier performed 4 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.700000000000e+01, best bound 7.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 77 Solution: 1 x [53] 2 x [52] 2 x [51] 1 x [50] 2 x [49] 2 x [48] 1 x [47] 3 x [46] 1 x [45] 2 x [44] 3 x [43] 4 x [42] 2 x [41] 2 x [40] 2 x [39] 3 x [38] 2 x [37] 1 x [36] 1 x [35] 5 x [34] 2 x [33] 1 x [32] 2 x [31] 1 x [30] 1 x [1, 30] 2 x [2, 29] 2 x [4, 28] 1 x [5, 27] 3 x [6, 26] 1 x [7, 25] 2 x [3, 24] 1 x [6, 23] 3 x [8, 22] 2 x [2, 21] 1 x [9, 20] 1 x [19] 2 x [18] 2 x [17] 1 x [16] 1 x [10, 15] 1 x [11, 14] 1 x [11, 13] 1 x [12, 12]