Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:49:06 2012 Optimize a model with 6784 rows, 2862 columns and 23002 nonzeros Presolve removed 1219 rows and 0 columns Presolve time: 0.14s Presolved: 5565 rows, 2862 columns, 20140 nonzeros Variable types: 0 continuous, 2862 integer (2862 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.000000e+00, 4898 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 108 33.00000 3.00000 90.9% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 233 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 126 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 126 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 143 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 21s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 24s 0 2 3.00000 0 161 4.00000 3.00000 25.0% - 27s 5 5 3.00000 1 60 4.00000 3.00000 25.0% 838 30s 7 6 3.00000 1 112 4.00000 3.00000 25.0% 599 36s 9 8 3.00000 1 73 4.00000 3.00000 25.0% 466 42s 10 8 3.00000 1 106 4.00000 3.00000 25.0% 419 45s 12 10 3.00000 1 114 4.00000 3.00000 25.0% 349 50s Cutting planes: Gomory: 2 Clique: 1 Zero half: 5 Explored 18 nodes (252499 simplex iterations) in 53.16 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%