Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:23:27 2012 Optimize a model with 12809 rows, 3782 columns and 41905 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.34s Presolved: 12807 rows, 3780 columns, 41485 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2554 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 61.00000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1063 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2662 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 4s 0 0 2.66667 0 157 4.00000 2.66667 33.3% - 11s 0 0 2.67045 0 3300 4.00000 2.67045 33.2% - 18s 0 0 2.67045 0 3314 4.00000 2.67045 33.2% - 19s 0 0 2.67045 0 3189 4.00000 2.67045 33.2% - 27s 0 0 2.67045 0 3211 4.00000 2.67045 33.2% - 32s 0 0 2.67045 0 3078 4.00000 2.67045 33.2% - 39s 0 0 2.67045 0 3140 4.00000 2.67045 33.2% - 47s 0 0 2.67045 0 3096 4.00000 2.67045 33.2% - 55s 0 0 2.67045 0 3085 4.00000 2.67045 33.2% - 63s 0 0 2.67045 0 3296 4.00000 2.67045 33.2% - 71s 0 0 2.67045 0 3247 4.00000 2.67045 33.2% - 81s 0 0 2.67045 0 3234 4.00000 2.67045 33.2% - 87s 0 0 2.67045 0 3228 4.00000 2.67045 33.2% - 96s 0 0 2.67045 0 3082 4.00000 2.67045 33.2% - 103s 0 0 2.67045 0 3327 4.00000 2.67045 33.2% - 109s 0 0 2.67045 0 3327 4.00000 2.67045 33.2% - 111s 0 2 2.80000 0 3327 4.00000 2.80000 30.0% - 135s Cutting planes: Clique: 75 Zero half: 6 Explored 13 nodes (293795 simplex iterations) in 139.37 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%