Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012 Optimize a model with 534 rows, 47 columns and 1068 nonzeros Presolve removed 363 rows and 0 columns Presolve time: 0.01s Presolved: 171 rows, 47 columns, 925 nonzeros Variable types: 0 continuous, 47 integer (47 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 9.200000e+00, 73 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.20000 0 33 6.00000 9.20000 53.3% - 0s 0 0 8.89886 0 43 6.00000 8.89886 48.3% - 0s 0 0 8.83996 0 38 6.00000 8.83996 47.3% - 0s H 0 0 7.0000000 8.83996 26.3% - 0s 0 0 8.78632 0 45 7.00000 8.78632 25.5% - 0s 0 0 8.76893 0 46 7.00000 8.76893 25.3% - 0s 0 0 8.76540 0 45 7.00000 8.76540 25.2% - 0s 0 0 8.76461 0 45 7.00000 8.76461 25.2% - 0s 0 2 8.76096 0 45 7.00000 8.76096 25.2% - 0s Cutting planes: Gomory: 2 Clique: 20 Zero half: 7 Explored 7 nodes (440 simplex iterations) in 0.06 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%