Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:35:08 2012 Optimize a model with 8777 rows, 1122 columns and 27289 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8808 rows, 1120 columns, 30309 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.462264e+00, 7086 iterations, 0.52 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46226 0 995 33.00000 3.46226 89.5% - 1s H 0 0 31.0000000 3.46226 88.8% - 2s 0 0 5.00000 0 82 31.00000 5.00000 83.9% - 2s H 0 0 10.0000000 5.00000 50.0% - 2s 0 0 5.57143 0 100 10.00000 5.57143 44.3% - 3s 0 0 7.00000 0 77 10.00000 7.00000 30.0% - 3s H 0 0 9.0000000 7.00000 22.2% - 3s 0 0 7.00000 0 120 9.00000 7.00000 22.2% - 3s 0 0 7.00000 0 60 9.00000 7.00000 22.2% - 3s H 0 0 8.0000000 7.00000 12.5% - 3s 0 0 7.00000 0 50 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 20 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 53 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 81 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 99 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 129 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 61 8.00000 7.00000 12.5% - 5s 0 2 7.00000 0 61 8.00000 7.00000 12.5% - 5s 704 28 7.00000 25 96 8.00000 7.00000 12.5% 73.3 10s 1404 19 7.00000 39 70 8.00000 7.00000 12.5% 80.7 15s Cutting planes: Clique: 8 Zero half: 4 Explored 1714 nodes (169360 simplex iterations) in 16.02 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%