Build (method = -2) #dp: 2688 Step-3' Graph: 129 vertices and 380 arcs (0.02s) Step-4' Graph: 16 vertices and 154 arcs (0.02s) #V4/#V3 = 0.12 #A4/#A3 = 0.41 Ready! (0.02s) Optimize a model with 56 rows, 155 columns and 437 nonzeros Presolve removed 4 rows and 5 columns Presolve time: 0.00s Presolved: 52 rows, 150 columns, 425 nonzeros Variable types: 0 continuous, 150 integer (21 binary) Found heuristic solution: objective 92.0000000 Found heuristic solution: objective 91.0000000 Optimize a model with 52 rows, 150 columns and 425 nonzeros Presolved: 52 rows, 150 columns, 425 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.600e+02 Factor NZ : 6.180e+02 Factor Ops : 1.185e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.10575754e+02 -4.86744729e+02 5.01e+01 3.18e-02 5.11e+00 0s 1 8.93261394e+01 -1.41426256e+02 1.56e-13 3.33e-16 7.23e-01 0s 2 4.28070965e+01 1.69332922e+01 1.01e-13 2.78e-16 7.86e-02 0s 3 3.34176604e+01 3.25829443e+01 2.18e-14 1.11e-16 2.52e-03 0s 4 3.33334386e+01 3.33325849e+01 4.76e-14 1.11e-16 2.58e-06 0s 5 3.33333333e+01 3.33333333e+01 5.69e-14 2.22e-16 2.58e-12 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 116 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 3 91.00000 33.33333 63.4% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (136 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.04 seconds Objective: 34 Solution: 1 x [4, 13, 38] 1 x [3, 3, 13] 2 x [2, 13, 24] 2 x [1, 8, 39] 3 x [30, 36, 40] 1 x [12, 27, 37] 3 x [25, 27, 35] 4 x [16, 22, 34] 2 x [14, 22, 33] 1 x [12, 20, 32] 1 x [15, 31, 31] 1 x [29] 2 x [15, 21, 29] 3 x [18, 23, 28] 1 x [6, 12, 27] 1 x [6, 10, 26] 1 x [5, 8, 19] 1 x [9, 9, 18] 3 x [7, 11, 17]