Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:26:37 2012 Optimize a model with 13632 rows, 4160 columns and 44800 nonzeros Presolve removed 1 rows and 64 columns Presolve time: 0.11s Presolved: 13631 rows, 4096 columns, 44905 nonzeros Variable types: 0 continuous, 4096 integer (4096 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 2.000000e+00, 5557 iterations, 0.49 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 42.00000 2.00000 95.2% - 2s H 0 0 14.0000000 2.00000 85.7% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 27s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 34s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 40s 0 2 2.00000 0 126 5.00000 2.00000 60.0% - 56s 1 3 2.50000 1 171 5.00000 2.00000 60.0% 20020 60s 2 4 2.50000 1 125 5.00000 2.50000 50.0% 17602 68s 4 6 3.00000 3 139 5.00000 2.50000 50.0% 10134 70s 27 27 4.00000 24 123 5.00000 2.50000 50.0% 1843 75s * 32 17 29 4.0000000 2.50000 37.5% 1565 75s 38 17 2.60000 3 377 4.00000 2.50000 37.5% 1643 80s 58 19 3.00000 4 137 4.00000 2.50000 37.5% 1339 85s 113 23 3.00000 11 114 4.00000 3.00000 25.0% 868 90s 201 6 3.00000 5 120 4.00000 3.00000 25.0% 629 97s Cutting planes: Clique: 103 Zero half: 1 Explored 224 nodes (210475 simplex iterations) in 97.73 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%