Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:32:12 2012 Optimize a model with 6864 rows, 2756 columns and 23140 nonzeros Presolve removed 1873 rows and 52 columns Presolve time: 0.15s Presolved: 4991 rows, 2704 columns, 18720 nonzeros Variable types: 0 continuous, 2704 integer (2704 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.000000e+00, 4926 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 129 29.00000 3.00000 89.7% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 201 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 129 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 134 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 147 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 147 4.00000 3.00000 25.0% - 17s 0 2 3.00000 0 147 4.00000 3.00000 25.0% - 19s 2 3 3.00000 1 147 4.00000 3.00000 25.0% 1911 20s 5 5 3.00000 1 165 4.00000 3.00000 25.0% 764 26s 7 6 3.00000 1 156 4.00000 3.00000 25.0% 546 31s 9 8 3.00000 1 164 4.00000 3.00000 25.0% 425 40s 13 10 3.00000 13 265 4.00000 3.00000 25.0% 7846 50s Cutting planes: Gomory: 10 Clique: 1 Zero half: 21 Explored 16 nodes (206984 simplex iterations) in 50.51 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%