Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:55:10 2012 Optimize a model with 742 rows, 121 columns and 1484 nonzeros Presolve removed 295 rows and 0 columns Presolve time: 0.00s Presolved: 447 rows, 121 columns, 1153 nonzeros Variable types: 0 continuous, 121 integer (121 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.086265e+01, 315 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.86265 0 118 27.00000 40.86265 51.3% - 0s 0 0 40.24772 0 118 27.00000 40.24772 49.1% - 0s H 0 0 28.0000000 40.24772 43.7% - 0s 0 0 39.89131 0 119 28.00000 39.89131 42.5% - 0s H 0 0 29.0000000 39.89131 37.6% - 0s 0 0 39.78190 0 117 29.00000 39.78190 37.2% - 0s 0 0 39.66204 0 118 29.00000 39.66204 36.8% - 0s 0 0 39.55950 0 119 29.00000 39.55950 36.4% - 0s 0 0 39.33835 0 118 29.00000 39.33835 35.6% - 0s 0 0 39.20724 0 116 29.00000 39.20724 35.2% - 0s 0 0 39.15421 0 118 29.00000 39.15421 35.0% - 0s 0 0 39.14124 0 118 29.00000 39.14124 35.0% - 0s 0 0 39.14124 0 118 29.00000 39.14124 35.0% - 0s 0 2 39.13834 0 118 29.00000 39.13834 35.0% - 0s H 19 17 30.0000000 39.10885 30.4% 41.1 0s H 66 28 31.0000000 38.45042 24.0% 38.0 0s * 323 104 12 32.0000000 36.93370 15.4% 30.7 0s 614 165 33.97674 15 119 32.00000 36.21429 13.2% 29.9 5s H 1341 124 33.0000000 35.50000 7.58% 31.7 9s Cutting planes: Gomory: 2 Zero half: 43 Explored 1639 nodes (49259 simplex iterations) in 9.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%