Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:31 2012 Optimize a model with 3504 rows, 600 columns and 11016 nonzeros Presolve time: 0.05s Presolved: 3504 rows, 600 columns, 20538 nonzeros Variable types: 0 continuous, 600 integer (600 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 6.000000e+00, 2208 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6.00000 0 44 17.00000 6.00000 64.7% - 0s H 0 0 8.0000000 6.00000 25.0% - 0s 0 0 6.00000 0 73 8.00000 6.00000 25.0% - 0s H 0 0 7.0000000 6.00000 14.3% - 0s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 28 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 24 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 44 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 87 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 24 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 23 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 37 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 37 7.00000 6.00000 14.3% - 3s 0 2 6.00000 0 37 7.00000 6.00000 14.3% - 4s 5 5 6.00000 1 16 7.00000 6.00000 14.3% 127 5s 33 16 6.00000 19 62 7.00000 6.00000 14.3% 823 10s Cutting planes: Gomory: 1 Clique: 14 Explored 72 nodes (58756 simplex iterations) in 11.15 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%