Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:26:42 2012 Optimize a model with 11481 rows, 16770 columns and 50697 nonzeros Presolve removed 33 rows and 4257 columns Presolve time: 0.20s Presolved: 11448 rows, 12513 columns, 46440 nonzeros Variable types: 0 continuous, 12513 integer (12513 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 2.000000e+00, 11852 iterations, 0.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 47.00000 2.00000 95.7% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s 0 0 2.00000 0 341 3.00000 2.00000 33.3% - 6s 0 0 2.00000 0 266 3.00000 2.00000 33.3% - 14s 0 0 2.00000 0 138 3.00000 2.00000 33.3% - 21s 0 0 2.00000 0 233 3.00000 2.00000 33.3% - 28s 0 0 2.00000 0 264 3.00000 2.00000 33.3% - 38s 0 0 2.00000 0 138 3.00000 2.00000 33.3% - 45s 0 0 2.00000 0 243 3.00000 2.00000 33.3% - 52s 0 0 2.00000 0 264 3.00000 2.00000 33.3% - 59s 0 0 2.00000 0 264 3.00000 2.00000 33.3% - 63s 0 2 2.00000 0 264 3.00000 2.00000 33.3% - 75s 5 5 2.00000 1 241 3.00000 2.00000 33.3% 4661 90s 6 6 2.00000 1 138 3.00000 2.00000 33.3% 3884 95s 7 6 2.00000 1 237 3.00000 2.00000 33.3% 3330 107s 8 7 2.00000 1 138 3.00000 2.00000 33.3% 2913 124s 9 8 2.00000 1 142 3.00000 2.00000 33.3% 2590 161s 12 10 infeasible 10 3.00000 2.00000 33.3% 17528 166s Cutting planes: Gomory: 13 Zero half: 4 Explored 14 nodes (437059 simplex iterations) in 166.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%