Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:48:47 2012 Optimize a model with 9553 rows, 1190 columns and 29680 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.11s Presolved: 9585 rows, 1188 columns, 32596 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 3.461187e+00, 9548 iterations, 0.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46119 0 1033 34.00000 3.46119 89.8% - 1s 0 0 5.00000 0 104 34.00000 5.00000 85.3% - 3s H 0 0 12.0000000 5.00000 58.3% - 3s 0 0 5.33333 0 115 12.00000 5.33333 55.6% - 3s 0 0 7.00000 0 103 12.00000 7.00000 41.7% - 4s H 0 0 11.0000000 7.00000 36.4% - 4s H 0 0 9.0000000 7.00000 22.2% - 4s 0 0 7.00000 0 119 9.00000 7.00000 22.2% - 4s 0 0 7.00000 0 26 9.00000 7.00000 22.2% - 4s H 0 0 8.0000000 7.00000 12.5% - 4s 0 0 7.00000 0 22 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 78 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 75 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 22 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 73 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 46 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 53 8.00000 7.00000 12.5% - 6s 0 0 7.00000 0 22 8.00000 7.00000 12.5% - 6s 0 0 7.00000 0 22 8.00000 7.00000 12.5% - 6s 0 2 7.00000 0 14 8.00000 7.00000 12.5% - 6s 259 16 7.00000 20 103 8.00000 7.00000 12.5% 107 10s 1244 14 7.00000 22 62 8.00000 7.00000 12.5% 90.9 15s Cutting planes: Gomory: 11 Clique: 61 Zero half: 31 Explored 2005 nodes (216706 simplex iterations) in 18.50 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%