Build (method = -2) #dp: 6918 Step-3' Graph: 137 vertices and 404 arcs (0.04s) Step-4' Graph: 9 vertices and 148 arcs (0.04s) #V4/#V3 = 0.07 #A4/#A3 = 0.37 Ready! (0.04s) Optimize a model with 54 rows, 149 columns and 433 nonzeros Presolve removed 4 rows and 4 columns Presolve time: 0.00s Presolved: 50 rows, 145 columns, 423 nonzeros Variable types: 0 continuous, 145 integer (115 binary) Found heuristic solution: objective 46.0000000 Optimize a model with 50 rows, 145 columns and 423 nonzeros Presolved: 50 rows, 145 columns, 423 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.480e+02 Factor NZ : 6.040e+02 Factor Ops : 1.176e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.62403558e+02 -1.88331432e+02 8.59e+00 7.69e-03 1.73e+00 0s 1 4.06386608e+01 -2.04887165e+01 1.90e-13 2.22e-16 2.21e-01 0s 2 1.86533045e+01 1.19331888e+01 1.59e-13 2.22e-16 2.40e-02 0s 3 1.66739174e+01 1.66318209e+01 4.06e-14 6.37e-17 1.43e-04 0s 4 1.66666739e+01 1.66666318e+01 9.21e-15 1.11e-16 1.43e-07 0s 5 1.66666667e+01 1.66666667e+01 2.31e-14 1.11e-16 1.43e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 93 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 5 46.00000 16.66667 63.8% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (124 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: 0.05 seconds Gurobi run time: 0.01 seconds Total run time: 0.05 seconds Objective: 17 Solution: 1 x [16, 16, 35] 1 x [6, 7, 33] 1 x [11, 44, 45] 1 x [7, 26] 1 x [3, 36, 45] 1 x [32, 38, 42] 1 x [28, 31, 41] 1 x [23, 27, 30] 1 x [17, 22, 29] 1 x [1, 26, 34] 1 x [12, 21, 25] 1 x [9, 20, 24] 1 x [2, 22, 37] 1 x [8, 15, 19] 1 x [5, 13, 18] 1 x [4, 14, 43] 1 x [10, 39, 40]