Build (method = -2) #dp: 2590 Step-3' Graph: 117 vertices and 344 arcs (0.01s) Step-4' Graph: 12 vertices and 134 arcs (0.01s) #V4/#V3 = 0.10 #A4/#A3 = 0.39 Ready! (0.01s) Optimize a model with 50 rows, 135 columns and 385 nonzeros Presolve removed 6 rows and 6 columns Presolve time: 0.00s Presolved: 44 rows, 129 columns, 369 nonzeros Variable types: 0 continuous, 129 integer (77 binary) Found heuristic solution: objective 22.0000000 Optimize a model with 44 rows, 129 columns and 369 nonzeros Presolved: 44 rows, 129 columns, 369 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.330e+02 Factor NZ : 5.820e+02 Factor Ops : 1.169e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.33036563e+02 -1.42597656e+02 1.47e+01 2.22e-02 1.73e+00 0s 1 3.13682232e+01 -3.05730538e+01 5.68e-14 2.78e-16 2.44e-01 0s 2 1.82429063e+01 1.14162161e+01 5.46e-14 1.67e-16 2.62e-02 0s 3 1.66828546e+01 1.66503644e+01 2.07e-14 1.11e-16 1.22e-04 0s 4 1.66666829e+01 1.66666503e+01 1.66e-14 3.33e-16 1.22e-07 0s 5 1.66666667e+01 1.66666667e+01 2.81e-14 2.22e-16 1.22e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 91 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 4 22.00000 16.66667 24.2% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (127 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 17 Solution: 1 x [12, 24, 27] 1 x [11, 21, 26] 1 x [25, 36, 36] 2 x [14, 19, 23] 1 x [22, 37, 37] 1 x [10, 19, 20] 1 x [9, 18, 19] 1 x [4, 16, 17] 1 x [2, 2, 15] 1 x [8, 13, 35] 1 x [6, 12, 35] 1 x [3, 3, 12] 1 x [1, 7, 34] 1 x [5, 31, 38] 1 x [29, 32, 33] 1 x [28, 30]