Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:20:42 2012 Optimize a model with 7235 rows, 2970 columns and 24406 nonzeros Presolve removed 1460 rows and 2 columns Presolve time: 0.19s Presolved: 5829 rows, 2968 columns, 23706 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 3.000000e+00, 5123 iterations, 0.85 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 87 54.00000 3.00000 94.4% - 4s H 0 0 28.0000000 3.00000 89.3% - 4s H 0 0 27.0000000 3.00000 88.9% - 4s H 0 0 5.0000000 3.00000 40.0% - 4s 0 0 3.00000 0 247 5.00000 3.00000 40.0% - 5s H 0 0 4.0000000 3.00000 25.0% - 5s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 103 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 54 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 25s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 27s 0 2 3.00000 0 66 4.00000 3.00000 25.0% - 28s 2 3 3.00000 1 66 4.00000 3.00000 25.0% 1316 30s 4 4 3.00000 1 145 4.00000 3.00000 25.0% 658 35s 6 6 3.00000 1 81 4.00000 3.00000 25.0% 439 40s 9 8 3.00000 1 90 4.00000 3.00000 25.0% 292 48s 10 8 3.00000 1 237 4.00000 3.00000 25.0% 263 57s 11 9 3.00000 1 100 4.00000 3.00000 25.0% 239 60s Cutting planes: Gomory: 8 Clique: 2 Zero half: 8 Explored 15 nodes (255132 simplex iterations) in 62.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%