Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:07:14 2012 Optimize a model with 6850 rows, 992 columns and 21388 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 6879 rows, 990 columns, 25169 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.468354e+00, 7612 iterations, 0.53 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46835 0 774 31.00000 3.46835 88.8% - 1s H 0 0 26.0000000 3.46835 86.7% - 1s 0 0 6.00000 0 121 26.00000 6.00000 76.9% - 2s H 0 0 15.0000000 6.00000 60.0% - 2s H 0 0 11.0000000 6.00000 45.5% - 2s H 0 0 9.0000000 6.00000 33.3% - 2s 0 0 6.00000 0 129 9.00000 6.00000 33.3% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 45 8.00000 6.00000 25.0% - 3s H 0 0 7.0000000 6.00000 14.3% - 3s 0 0 6.00000 0 55 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 49 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 104 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 78 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 105 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 109 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 90 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 90 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 85 7.00000 6.00000 14.3% - 4s 0 2 6.00000 0 85 7.00000 6.00000 14.3% - 4s Cutting planes: Clique: 19 Zero half: 3 Explored 9 nodes (27010 simplex iterations) in 4.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%