Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:20:31 2012 Optimize a model with 3696 rows, 1806 columns and 12726 nonzeros Presolve removed 715 rows and 42 columns Presolve time: 0.07s Presolved: 2981 rows, 1764 columns, 11004 nonzeros Variable types: 0 continuous, 1764 integer (1764 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.000000e+00, 3170 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 86 24.00000 3.00000 87.5% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 125 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 40 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 68 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 68 4.00000 3.00000 25.0% - 4s 0 2 3.00000 0 59 4.00000 3.00000 25.0% - 5s 10 8 3.00000 1 46 4.00000 3.00000 25.0% 211 10s Cutting planes: Gomory: 2 Zero half: 2 Explored 12 nodes (98461 simplex iterations) in 11.93 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%