Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:55:17 2012 Optimize a model with 5686 rows, 2256 columns and 19080 nonzeros Presolve removed 1177 rows and 2 columns Presolve time: 0.13s Presolved: 4556 rows, 2254 columns, 18371 nonzeros Variable types: 0 continuous, 2254 integer (2254 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 3.000000e+00, 4025 iterations, 0.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 843 47.00000 3.00000 93.6% - 1s H 0 0 29.0000000 3.00000 89.7% - 1s H 0 0 23.0000000 3.00000 87.0% - 1s H 0 0 22.0000000 3.00000 86.4% - 1s 0 0 3.00000 0 117 22.00000 3.00000 86.4% - 2s H 0 0 17.0000000 3.00000 82.4% - 2s H 0 0 6.0000000 3.00000 50.0% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 122 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 13s 0 2 3.00000 0 103 4.00000 3.00000 25.0% - 15s 5 5 3.00000 1 110 4.00000 3.00000 25.0% 924 21s Cutting planes: Gomory: 13 Clique: 2 Zero half: 74 Explored 6 nodes (112044 simplex iterations) in 23.65 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%