Build (method = -2) #dp: 2200 Step-3' Graph: 97 vertices and 301 arcs (0.01s) Step-4' Graph: 16 vertices and 139 arcs (0.01s) #V4/#V3 = 0.16 #A4/#A3 = 0.46 Ready! (0.01s) Optimize a model with 81 rows, 140 columns and 392 nonzeros Presolve removed 50 rows and 71 columns Presolve time: 0.00s Presolved: 31 rows, 69 columns, 178 nonzeros Variable types: 0 continuous, 69 integer (7 binary) Found heuristic solution: objective 67.0000000 Optimize a model with 31 rows, 69 columns and 178 nonzeros Presolve removed 1 rows and 1 columns Presolved: 30 rows, 68 columns, 176 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.700e+01 Factor NZ : 4.650e+02 Factor Ops : 9.455e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.99691951e+02 -8.07679176e+02 6.76e+01 2.22e-16 3.26e+01 0s 1 1.84420694e+02 -2.87768994e+02 6.34e+00 4.44e-16 4.60e+00 0s 2 7.04513862e+01 -1.27030790e+01 1.51e-14 3.29e-14 5.44e-01 0s 3 5.50202474e+01 3.19801077e+01 2.59e-14 7.66e-15 1.51e-01 0s 4 5.00963578e+01 4.85464178e+01 2.84e-14 8.88e-16 1.01e-02 0s 5 5.00000100e+01 4.99998773e+01 1.05e-14 4.44e-16 8.67e-07 0s 6 5.00000000e+01 5.00000000e+01 4.09e-14 4.44e-16 8.75e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 35 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (35 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 50 Solution: 1 x [30, 65] 1 x [27, 64] 3 x [19, 63] 1 x [21, 62] 1 x [14, 61] 2 x [23, 60] 1 x [12, 59] 3 x [42, 58] 2 x [43, 57] 1 x [11, 57] 2 x [20, 56] 1 x [7, 55] 1 x [40, 54] 1 x [6, 54] 1 x [39, 53] 1 x [5, 53] 1 x [3, 52] 1 x [2, 51] 2 x [47, 50] 1 x [46, 49] 1 x [1, 49] 1 x [48, 48] 1 x [32, 45] 1 x [4, 45] 1 x [9, 44] 1 x [8, 43] 1 x [13, 41] 2 x [33, 38] 1 x [16, 37] 1 x [15, 36] 1 x [22, 35] 1 x [26, 34] 2 x [29, 31] 2 x [17, 28] 2 x [10, 25] 3 x [18, 24]