Build (method = -2) #dp: 398 Step-3' Graph: 35 vertices and 171 arcs (0.00s) Step-4' Graph: 21 vertices and 143 arcs (0.00s) #V4/#V3 = 0.60 #A4/#A3 = 0.84 Ready! (0.00s) Optimize a model with 61 rows, 144 columns and 395 nonzeros Presolve removed 30 rows and 35 columns Presolve time: 0.00s Presolved: 31 rows, 109 columns, 274 nonzeros Variable types: 0 continuous, 109 integer (63 binary) Found heuristic solution: objective 37.0000000 Found heuristic solution: objective 34.0000000 Optimize a model with 31 rows, 109 columns and 274 nonzeros Presolved: 31 rows, 109 columns, 274 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.180e+02 Factor NZ : 3.340e+02 Factor Ops : 4.584e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.55894392e+02 -1.79883573e+02 1.29e+02 3.55e-01 5.67e+00 0s 1 5.66403893e+01 -6.05917583e+01 1.14e+01 3.33e-16 8.12e-01 0s 2 3.67557042e+01 1.98758811e+01 2.16e-01 1.11e-16 7.83e-02 0s 3 3.12174992e+01 2.77953657e+01 1.11e-02 6.99e-05 1.55e-02 0s 4 3.03789674e+01 2.93866545e+01 7.40e-04 1.43e-16 4.48e-03 0s 5 3.00654662e+01 2.98794297e+01 1.51e-04 1.11e-16 8.39e-04 0s 6 3.00003859e+01 2.99994260e+01 6.11e-07 2.22e-16 4.33e-06 0s 7 3.00000000e+01 3.00000000e+01 6.74e-13 2.22e-16 5.02e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.00000000e+01 Root relaxation: objective 3.000000e+01, 24 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 30.0000000 30.00000 0.0% - 0s Explored 0 nodes (24 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 30 Solution: 1 x [40] 1 x [39] 1 x [38] 1 x [37] 1 x [36] 3 x [35] 1 x [34] 2 x [33] 1 x [1, 32] 1 x [1, 31] 1 x [2, 30] 1 x [5, 29] 1 x [7, 28] 1 x [6, 27] 1 x [11, 26] 1 x [10, 25] 1 x [12, 24] 1 x [9, 23] 2 x [7, 22] 1 x [4, 21] 1 x [14, 20] 1 x [15, 19] 1 x [16, 18] 1 x [14, 17] 1 x [13, 13] 1 x [3, 3, 8]