Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:24:40 2012 Optimize a model with 8191 rows, 1056 columns and 25470 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8189 rows, 1054 columns, 28586 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.538462e+00, 7961 iterations, 0.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.53846 0 880 31.00000 3.53846 88.6% - 1s 0 0 6.00000 0 101 31.00000 6.00000 80.6% - 2s H 0 0 27.0000000 6.00000 77.8% - 2s H 0 0 10.0000000 6.00000 40.0% - 2s H 0 0 9.0000000 6.00000 33.3% - 2s 0 0 6.06250 0 151 9.00000 6.06250 32.6% - 2s 0 0 7.00000 0 80 9.00000 7.00000 22.2% - 2s 0 0 7.00000 0 106 9.00000 7.00000 22.2% - 2s H 0 0 8.0000000 7.00000 12.5% - 2s 0 0 7.00000 0 18 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 24 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 35 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 20 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 41 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 51 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 24 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 24 8.00000 7.00000 12.5% - 3s 0 2 7.00000 0 24 8.00000 7.00000 12.5% - 3s 40 9 infeasible 20 8.00000 7.00000 12.5% 216 5s Cutting planes: Gomory: 2 Clique: 51 Zero half: 8 Explored 143 nodes (39458 simplex iterations) in 5.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%