Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:24 2012 Optimize a model with 765 rows, 56 columns and 1530 nonzeros Presolve removed 527 rows and 0 columns Presolve time: 0.01s Presolved: 238 rows, 56 columns, 1332 nonzeros Variable types: 0 continuous, 56 integer (56 binary) Found heuristic solution: objective 4.0000000 Root relaxation: objective 9.850970e+00, 136 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.85097 0 51 4.00000 9.85097 146% - 0s H 0 0 6.0000000 9.85097 64.2% - 0s H 0 0 8.0000000 9.85097 23.1% - 0s 0 0 9.54541 0 54 8.00000 9.54541 19.3% - 0s 0 0 9.46726 0 56 8.00000 9.46726 18.3% - 0s 0 0 9.43460 0 55 8.00000 9.43460 17.9% - 0s 0 0 9.42912 0 54 8.00000 9.42912 17.9% - 0s 0 0 9.42801 0 55 8.00000 9.42801 17.9% - 0s 0 2 9.42533 0 55 8.00000 9.42533 17.8% - 0s Cutting planes: Gomory: 3 Clique: 13 Zero half: 13 Explored 9 nodes (503 simplex iterations) in 0.09 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%