Build (method = -2) #dp: 7860 Step-3' Graph: 141 vertices and 416 arcs (0.04s) Step-4' Graph: 8 vertices and 150 arcs (0.04s) #V4/#V3 = 0.06 #A4/#A3 = 0.36 Ready! (0.04s) Optimize a model with 55 rows, 151 columns and 441 nonzeros Presolve removed 5 rows and 5 columns Presolve time: 0.00s Presolved: 50 rows, 146 columns, 428 nonzeros Variable types: 0 continuous, 146 integer (124 binary) Found heuristic solution: objective 48.0000000 Optimize a model with 50 rows, 146 columns and 428 nonzeros Presolved: 50 rows, 146 columns, 428 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.470e+02 Factor NZ : 6.030e+02 Factor Ops : 1.176e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.61962845e+02 -1.80020814e+02 8.30e+00 7.03e-03 1.64e+00 0s 1 4.03690135e+01 -1.58770286e+01 1.21e-13 2.22e-16 2.04e-01 0s 2 1.87960231e+01 1.39961908e+01 9.09e-13 5.41e-03 1.70e-02 0s 3 1.66711779e+01 1.66488870e+01 8.99e-13 2.22e-16 7.56e-05 0s 4 1.66666712e+01 1.66666489e+01 2.50e-13 2.87e-16 7.56e-08 0s 5 1.66666667e+01 1.66666667e+01 5.77e-14 1.54e-16 7.56e-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 4 48.00000 16.66667 65.3% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (128 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 [3, 41, 47] 1 x [5, 40, 46] 1 x [7, 40] 1 x [1, 23, 37] 1 x [35, 36, 39] 1 x [12, 20, 28] 1 x [11, 22, 26] 1 x [10, 18, 19] 1 x [6, 13, 17] 1 x [4, 5, 16] 1 x [2, 8, 45] 1 x [38, 42, 44] 1 x [31, 34, 43] 1 x [25, 32, 33] 1 x [9, 14, 33] 1 x [21, 29, 30] 1 x [15, 24, 27]