Build (method = -2) #dp: 2070 Step-3' Graph: 97 vertices and 299 arcs (0.01s) Step-4' Graph: 18 vertices and 141 arcs (0.01s) #V4/#V3 = 0.19 #A4/#A3 = 0.47 Ready! (0.01s) Optimize a model with 81 rows, 142 columns and 394 nonzeros Presolve removed 48 rows and 65 columns Presolve time: 0.00s Presolved: 33 rows, 77 columns, 197 nonzeros Variable types: 0 continuous, 77 integer (12 binary) Found heuristic solution: objective 68.0000000 Found heuristic solution: objective 66.0000000 Optimize a model with 33 rows, 77 columns and 197 nonzeros Presolved: 33 rows, 77 columns, 197 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.300e+01 Factor NZ : 5.020e+02 Factor Ops : 1.043e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.48391149e+02 -8.50880268e+02 1.15e+02 4.44e-16 3.01e+01 0s 1 2.14520000e+02 -3.10105170e+02 1.47e+01 8.88e-16 4.97e+00 0s 2 7.10777582e+01 -2.66081359e+01 1.41e-01 1.22e-15 5.76e-01 0s 3 5.25831972e+01 2.89806157e+01 4.22e-03 7.77e-16 1.37e-01 0s 4 5.00755722e+01 4.94111246e+01 1.32e-05 6.66e-16 3.86e-03 0s 5 5.00000134e+01 4.99999707e+01 1.01e-09 5.80e-16 2.48e-07 0s 6 5.00000000e+01 5.00000000e+01 1.24e-14 2.95e-16 2.48e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 38 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 (38 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: 2 x [30, 63] 2 x [16, 62] 2 x [32, 61] 1 x [21, 60] 3 x [27, 59] 1 x [19, 59] 1 x [18, 58] 1 x [35, 57] 1 x [13, 57] 1 x [37, 56] 1 x [12, 56] 1 x [10, 55] 1 x [8, 54] 3 x [22, 53] 1 x [43, 52] 1 x [3, 52] 2 x [44, 51] 3 x [17, 50] 1 x [47, 49] 2 x [46, 48] 1 x [1, 48] 1 x [2, 45] 1 x [41, 42] 1 x [4, 40] 1 x [9, 39] 1 x [11, 38] 1 x [15, 36] 2 x [14, 34] 1 x [26, 33] 1 x [20, 33] 1 x [25, 31] 2 x [7, 29] 2 x [6, 28] 2 x [5, 24] 1 x [16, 23]