Build (method = -2) #dp: 3223 Step-3' Graph: 147 vertices and 433 arcs (0.02s) Step-4' Graph: 18 vertices and 175 arcs (0.02s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.02s) Optimize a model with 63 rows, 176 columns and 497 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 60 rows, 173 columns, 490 nonzeros Variable types: 0 continuous, 173 integer (39 binary) Found heuristic solution: objective 63.0000000 Optimize a model with 60 rows, 173 columns and 490 nonzeros Presolved: 60 rows, 173 columns, 490 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.870e+02 Factor NZ : 6.530e+02 Factor Ops : 1.200e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.23801705e+02 -3.46184035e+02 6.83e+01 3.53e-02 4.14e+00 0s 1 7.49084254e+01 -1.22387664e+02 3.16e-13 2.22e-16 5.40e-01 0s 2 3.91935137e+01 1.73728125e+01 2.66e-14 2.22e-16 5.84e-02 0s 3 3.33871063e+01 3.30663402e+01 5.60e-14 2.04e-16 8.51e-04 0s 4 3.33333874e+01 3.33330666e+01 3.18e-14 2.22e-16 8.51e-07 0s 5 3.33333333e+01 3.33333333e+01 2.09e-14 1.49e-16 8.51e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 127 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 4 63.00000 33.33333 47.1% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (167 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 [22, 29, 45] 1 x [24, 30, 44] 1 x [2, 6, 44] 2 x [9, 39, 43] 1 x [21, 28, 42] 4 x [6, 8, 42] 3 x [15, 35, 41] 1 x [4, 4, 40] 3 x [10, 17, 38] 1 x [23, 33, 37] 1 x [24, 26, 36] 2 x [19, 29, 34] 2 x [5, 18, 32] 3 x [7, 11, 31] 1 x [13, 25, 27] 1 x [2, 12, 26] 2 x [1, 20, 25] 1 x [7, 10, 24] 1 x [2, 14, 23] 1 x [16] 1 x [3, 9, 16]