Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:40:30 2012 Optimize a model with 12415 rows, 4160 columns and 41086 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.37s Presolved: 12477 rows, 4158 columns, 44794 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 3208 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 62.00000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1380 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 2s 0 0 2.66667 0 2931 4.00000 2.66667 33.3% - 3s 0 0 2.66667 0 178 4.00000 2.66667 33.3% - 13s 0 0 2.67027 0 3190 4.00000 2.67027 33.2% - 20s 0 0 2.67027 0 3278 4.00000 2.67027 33.2% - 22s 0 0 2.67027 0 3356 4.00000 2.67027 33.2% - 29s 0 0 2.67027 0 3293 4.00000 2.67027 33.2% - 38s 0 0 2.67027 0 3223 4.00000 2.67027 33.2% - 45s 0 0 2.67027 0 3403 4.00000 2.67027 33.2% - 51s 0 0 2.67027 0 3387 4.00000 2.67027 33.2% - 57s 0 0 2.67027 0 3320 4.00000 2.67027 33.2% - 64s 0 0 2.67027 0 3409 4.00000 2.67027 33.2% - 71s 0 0 2.67027 0 3380 4.00000 2.67027 33.2% - 78s 0 0 2.67027 0 3373 4.00000 2.67027 33.2% - 85s 0 0 2.67027 0 3404 4.00000 2.67027 33.2% - 92s 0 0 2.67027 0 3404 4.00000 2.67027 33.2% - 99s 0 2 2.80000 0 3404 4.00000 2.80000 30.0% - 121s Cutting planes: Clique: 71 Zero half: 12 Explored 13 nodes (279702 simplex iterations) in 124.58 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%