Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:51:14 2012 Optimize a model with 6539 rows, 930 columns and 20398 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 6537 rows, 928 columns, 24218 nonzeros Variable types: 0 continuous, 928 integer (928 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.513514e+00, 5712 iterations, 0.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.51351 0 775 30.00000 3.51351 88.3% - 1s H 0 0 29.0000000 3.51351 87.9% - 1s 0 0 6.00000 0 127 29.00000 6.00000 79.3% - 2s H 0 0 24.0000000 6.00000 75.0% - 2s 0 0 6.00000 0 135 24.00000 6.00000 75.0% - 2s H 0 0 20.0000000 6.00000 70.0% - 2s H 0 0 7.0000000 6.00000 14.3% - 2s 0 0 6.00000 0 128 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 107 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 136 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 101 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 116 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 101 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 71 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 128 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 129 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 121 7.00000 6.00000 14.3% - 3s 0 2 6.00000 0 100 7.00000 6.00000 14.3% - 3s Cutting planes: Clique: 3 Zero half: 25 Explored 3 nodes (22069 simplex iterations) in 3.62 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%