Build (method = -2) #dp: 2146 Step-3' Graph: 92 vertices and 286 arcs (0.01s) Step-4' Graph: 20 vertices and 142 arcs (0.01s) #V4/#V3 = 0.22 #A4/#A3 = 0.50 Ready! (0.01s) Optimize a model with 84 rows, 143 columns and 394 nonzeros Presolve removed 49 rows and 60 columns Presolve time: 0.00s Presolved: 35 rows, 83 columns, 212 nonzeros Variable types: 0 continuous, 83 integer (15 binary) Found heuristic solution: objective 71.0000000 Found heuristic solution: objective 51.0000000 Optimize a model with 35 rows, 83 columns and 212 nonzeros Presolve removed 0 rows and 1 columns Presolved: 35 rows, 82 columns, 210 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.700e+01 Factor NZ : 3.700e+02 Factor Ops : 5.030e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.07298551e+03 -9.13368871e+02 1.79e+02 2.22e-16 3.42e+01 0s 1 2.58344681e+02 -2.96934721e+02 2.45e+01 6.66e-16 5.36e+00 0s 2 7.42808042e+01 -2.35638190e+01 4.18e-01 2.04e-14 5.59e-01 0s 3 5.54727627e+01 2.73547152e+01 1.05e-02 5.11e-15 1.55e-01 0s 4 5.04893150e+01 4.72503067e+01 1.70e-03 3.33e-16 1.79e-02 0s 5 5.00004863e+01 4.99983231e+01 3.27e-06 2.26e-16 1.19e-05 0s 6 5.00000000e+01 5.00000000e+01 3.29e-12 4.44e-16 1.20e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 43 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 (43 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: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 50 Solution: 1 x [23, 64] 2 x [22, 63] 1 x [25, 62] 3 x [19, 61] 2 x [17, 60] 3 x [14, 59] 1 x [21, 58] 2 x [28, 57] 1 x [19, 57] 1 x [30, 56] 1 x [18, 55] 1 x [16, 54] 1 x [33, 53] 1 x [12, 52] 1 x [9, 51] 2 x [4, 50] 2 x [1, 49] 1 x [8, 48] 2 x [34, 47] 1 x [7, 47] 2 x [42, 46] 1 x [3, 45] 1 x [2, 44] 1 x [41, 43] 1 x [6, 40] 1 x [36, 39] 1 x [37, 38] 1 x [11, 35] 2 x [10, 32] 2 x [13, 31] 1 x [20, 29] 1 x [26, 27] 2 x [5, 24] 3 x [15, 20]