Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:06:33 2012 Optimize a model with 7501 rows, 992 columns and 23341 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 7499 rows, 990 columns, 26659 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.468354e+00, 5709 iterations, 0.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46835 0 853 31.00000 3.46835 88.8% - 1s 0 0 6.00000 0 112 31.00000 6.00000 80.6% - 1s H 0 0 18.0000000 6.00000 66.7% - 1s H 0 0 15.0000000 6.00000 60.0% - 1s H 0 0 9.0000000 6.00000 33.3% - 1s 0 0 6.00000 0 141 9.00000 6.00000 33.3% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 74 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 95 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 103 8.00000 6.00000 25.0% - 5s 0 0 6.00000 0 116 8.00000 6.00000 25.0% - 6s 0 0 6.00000 0 114 8.00000 6.00000 25.0% - 7s 0 0 6.00000 0 139 8.00000 6.00000 25.0% - 8s 0 0 6.00000 0 139 8.00000 6.00000 25.0% - 8s 0 2 6.00000 0 139 8.00000 6.00000 25.0% - 11s * 33 10 32 7.0000000 6.00000 14.3% 181 12s Cutting planes: Gomory: 11 Clique: 25 Zero half: 191 Explored 41 nodes (45828 simplex iterations) in 13.92 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%