Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012 Optimize a model with 561 rows, 48 columns and 1122 nonzeros Presolve removed 398 rows and 0 columns Presolve time: 0.01s Presolved: 163 rows, 48 columns, 882 nonzeros Variable types: 0 continuous, 48 integer (48 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 8.984043e+00, 84 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.98404 0 39 5.00000 8.98404 79.7% - 0s H 0 0 6.0000000 8.98404 49.7% - 0s H 0 0 7.0000000 8.98404 28.3% - 0s 0 0 8.53922 0 47 7.00000 8.53922 22.0% - 0s H 0 0 8.0000000 8.53922 6.74% - 0s Cutting planes: Gomory: 1 Clique: 13 Zero half: 1 Explored 0 nodes (128 simplex iterations) in 0.02 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%