Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:05:59 2012 Optimize a model with 6850 rows, 992 columns and 21388 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 6848 rows, 990 columns, 24208 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.468354e+00, 7599 iterations, 0.54 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 0 0 6.00000 0 111 31.00000 6.00000 80.6% - 2s H 0 0 28.0000000 6.00000 78.6% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 131 8.00000 6.00000 25.0% - 2s 0 0 6.00000 0 84 8.00000 6.00000 25.0% - 3s H 0 0 7.0000000 6.00000 14.3% - 3s 0 0 6.00000 0 80 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 51 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 50 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 101 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 35 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 117 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 62 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 92 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 92 7.00000 6.00000 14.3% - 4s 0 2 6.00000 0 92 7.00000 6.00000 14.3% - 4s Cutting planes: Clique: 6 Zero half: 9 Explored 9 nodes (27924 simplex iterations) in 5.00 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%