Build (method = -2) #dp: 392 Step-3' Graph: 36 vertices and 177 arcs (0.00s) Step-4' Graph: 20 vertices and 145 arcs (0.00s) #V4/#V3 = 0.56 #A4/#A3 = 0.82 Ready! (0.00s) Optimize a model with 54 rows, 146 columns and 404 nonzeros Presolve removed 24 rows and 29 columns Presolve time: 0.00s Presolved: 30 rows, 117 columns, 319 nonzeros Variable types: 0 continuous, 117 integer (52 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 39.0000000 Optimize a model with 30 rows, 117 columns and 319 nonzeros Presolved: 30 rows, 117 columns, 319 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.520e+02 Factor NZ : 3.410e+02 Factor Ops : 4.775e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.54344035e+02 -3.14752679e+02 2.01e+02 1.98e-01 7.32e+00 0s 1 6.20479175e+01 -1.07755262e+02 2.25e+01 6.66e-16 1.18e+00 0s 2 3.94911884e+01 5.91660408e+00 9.24e-01 3.33e-16 1.49e-01 0s 3 3.21569037e+01 2.21566406e+01 7.64e-02 2.63e-16 4.18e-02 0s 4 2.99104619e+01 2.76647248e+01 8.14e-03 2.22e-16 9.33e-03 0s 5 2.91630939e+01 2.83536697e+01 1.51e-03 2.22e-16 3.36e-03 0s 6 2.90206325e+01 2.89367643e+01 3.89e-04 2.22e-16 3.48e-04 0s 7 2.90009345e+01 2.89996414e+01 9.48e-06 1.11e-16 5.38e-06 0s 8 2.90000009e+01 2.89999996e+01 5.04e-13 2.22e-16 5.38e-09 0s 9 2.90000000e+01 2.90000000e+01 3.87e-13 2.22e-16 5.44e-15 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 2.90000000e+01 Root relaxation: objective 2.900000e+01, 62 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 29.0000000 29.00000 0.0% - 0s Explored 0 nodes (62 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 29 Solution: 1 x [34] 1 x [33] 2 x [32] 2 x [31] 1 x [30] 2 x [29] 2 x [1, 28] 1 x [2, 27] 2 x [3, 26] 1 x [4, 25] 1 x [4, 24] 1 x [5, 23] 1 x [5, 22] 1 x [6, 21] 1 x [4, 20] 1 x [8, 19] 1 x [10, 18] 1 x [9, 18] 1 x [14, 17] 1 x [15, 16] 2 x [10, 13] 1 x [11, 12] 1 x [1, 7, 8]