Build (method = -2) #dp: 5889 Step-3' Graph: 137 vertices and 403 arcs (0.04s) Step-4' Graph: 9 vertices and 147 arcs (0.04s) #V4/#V3 = 0.07 #A4/#A3 = 0.36 Ready! (0.04s) Optimize a model with 54 rows, 148 columns and 431 nonzeros Presolve removed 4 rows and 4 columns Presolve time: 0.00s Presolved: 50 rows, 144 columns, 421 nonzeros Variable types: 0 continuous, 144 integer (115 binary) Found heuristic solution: objective 25.0000000 Found heuristic solution: objective 23.0000000 Found heuristic solution: objective 21.0000000 Optimize a model with 50 rows, 144 columns and 421 nonzeros Presolved: 50 rows, 144 columns, 421 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 1.12326346e+02 -9.05604553e+01 6.72e+00 1.10e-02 1.12e+00 0s 1 2.63667917e+01 -1.44788432e+01 6.41e-13 3.33e-16 1.52e-01 0s 2 1.82081041e+01 1.38365400e+01 1.78e-14 4.70e-03 1.55e-02 0s 3 1.66752255e+01 1.66532437e+01 1.42e-12 2.22e-16 7.50e-05 0s 4 1.66666752e+01 1.66666532e+01 4.02e-14 1.41e-16 7.50e-08 0s 5 1.66666667e+01 1.66666667e+01 3.35e-14 3.33e-16 7.51e-14 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 21.00000 16.66667 20.6% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (119 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 [12, 31, 34] 1 x [24, 29, 43] 1 x [25, 25, 28] 1 x [16, 17, 18] 1 x [10, 13, 15] 1 x [8, 27, 45] 2 x [7, 9, 19] 1 x [4, 6, 44] 1 x [1, 5, 35] 1 x [3, 33, 42] 1 x [2, 32, 39] 1 x [26, 37, 41] 1 x [11, 23, 41] 1 x [22, 36, 40] 1 x [20, 30, 38] 1 x [14, 21]