Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:24:31 2012 Optimize a model with 7839 rows, 1056 columns and 24414 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 7837 rows, 1054 columns, 26985 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.445783e+00, 8425 iterations, 0.62 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.44578 0 879 32.00000 3.44578 89.2% - 2s 0 0 6.00000 0 109 32.00000 6.00000 81.2% - 3s H 0 0 30.0000000 6.00000 80.0% - 3s H 0 0 10.0000000 6.00000 40.0% - 3s 0 0 6.00000 0 133 10.00000 6.00000 40.0% - 3s H 0 0 9.0000000 6.00000 33.3% - 3s H 0 0 7.0000000 6.00000 14.3% - 3s 0 0 6.00000 0 68 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 84 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 86 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 72 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 72 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 72 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 68 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 102 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 77 7.00000 6.00000 14.3% - 4s 0 2 6.00000 0 77 7.00000 6.00000 14.3% - 4s Cutting planes: Clique: 41 Zero half: 12 Explored 21 nodes (29700 simplex iterations) in 4.79 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%