Build (method = -2) #dp: 1581 Step-3' Graph: 83 vertices and 255 arcs (0.01s) Step-4' Graph: 17 vertices and 123 arcs (0.01s) #V4/#V3 = 0.20 #A4/#A3 = 0.48 Ready! (0.01s) Optimize a model with 71 rows, 124 columns and 342 nonzeros Presolve removed 35 rows and 45 columns Presolve time: 0.00s Presolved: 36 rows, 79 columns, 204 nonzeros Variable types: 0 continuous, 79 integer (6 binary) Found heuristic solution: objective 80.0000000 Found heuristic solution: objective 65.0000000 Optimize a model with 36 rows, 79 columns and 204 nonzeros Presolve removed 1 rows and 1 columns Presolved: 35 rows, 78 columns, 202 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.700e+01 Factor NZ : 5.080e+02 Factor Ops : 1.045e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.98878757e+02 -8.21874827e+02 3.43e+01 2.22e-16 3.24e+01 0s 1 2.11610712e+02 -3.30037669e+02 5.02e+00 8.88e-16 4.93e+00 0s 2 7.25886189e+01 -2.67697814e+01 4.38e-02 6.00e-15 5.69e-01 0s 3 5.33976461e+01 3.47340359e+01 1.92e-03 8.88e-16 1.05e-01 0s 4 5.00167055e+01 4.96613457e+01 2.18e-14 4.44e-16 2.01e-03 0s 5 5.00000001e+01 4.99999990e+01 3.11e-14 2.91e-16 6.52e-09 0s 6 5.00000000e+01 5.00000000e+01 1.40e-14 3.33e-16 6.64e-15 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 41 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 (41 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 [18, 54] 3 x [21, 53] 2 x [21, 52] 1 x [12, 51] 2 x [17, 50] 2 x [13, 49] 1 x [30, 48] 2 x [7, 47] 1 x [9, 46] 3 x [25, 45] 1 x [35, 44] 1 x [5, 43] 1 x [2, 42] 1 x [41, 41] 1 x [38, 40] 1 x [1, 40] 1 x [3, 39] 1 x [36, 37] 1 x [6, 37] 3 x [22, 34] 2 x [4, 33] 2 x [6, 32] 1 x [10, 31] 2 x [10, 29] 2 x [12, 28] 1 x [11, 27] 1 x [17, 26] 1 x [15, 24] 1 x [14, 23] 2 x [16, 20] 3 x [12, 19] 2 x [8, 17]