Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:39:32 2012 Optimize a model with 13859 rows, 4422 columns and 45670 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 13923 rows, 4420 columns, 49606 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3226 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 3072 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2474 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 2776 5.00000 2.66667 46.7% - 4s 0 0 2.66667 0 225 5.00000 2.66667 46.7% - 9s 0 0 2.67368 0 3492 5.00000 2.67368 46.5% - 14s 0 0 2.67368 0 3627 5.00000 2.67368 46.5% - 15s 0 0 2.67368 0 3575 5.00000 2.67368 46.5% - 20s 0 0 2.67368 0 3473 5.00000 2.67368 46.5% - 24s 0 0 2.67368 0 3495 5.00000 2.67368 46.5% - 29s 0 0 2.67368 0 3532 5.00000 2.67368 46.5% - 32s 0 0 2.67368 0 3504 5.00000 2.67368 46.5% - 36s H 0 0 4.0000000 2.67368 33.2% - 36s 0 0 2.67368 0 3491 4.00000 2.67368 33.2% - 40s 0 0 2.67368 0 3577 4.00000 2.67368 33.2% - 43s 0 0 2.67368 0 3584 4.00000 2.67368 33.2% - 48s 0 0 2.67368 0 3584 4.00000 2.67368 33.2% - 50s 0 1 3.00000 0 3584 4.00000 3.00000 25.0% - 64s 3 2 infeasible 3 4.00000 3.00000 25.0% 3016 65s Cutting planes: Clique: 119 Zero half: 12 Explored 10 nodes (132375 simplex iterations) in 67.53 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%