Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:51:26 2012 Optimize a model with 11097 rows, 3906 columns and 36888 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.29s Presolved: 11157 rows, 3904 columns, 40374 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2641 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 62.00000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 157 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 1s 0 0 2.67039 0 3387 4.00000 2.67039 33.2% - 1s 0 0 2.67039 0 3321 4.00000 2.67039 33.2% - 3s 0 0 2.67039 0 3330 4.00000 2.67039 33.2% - 4s 0 0 2.67039 0 2922 4.00000 2.67039 33.2% - 6s 0 0 2.67039 0 2980 4.00000 2.67039 33.2% - 7s 0 0 2.67039 0 2987 4.00000 2.67039 33.2% - 8s 0 0 2.67039 0 2980 4.00000 2.67039 33.2% - 9s 0 0 2.67039 0 2761 4.00000 2.67039 33.2% - 10s 0 0 2.67039 0 2803 4.00000 2.67039 33.2% - 11s 0 0 2.67039 0 2846 4.00000 2.67039 33.2% - 12s 0 0 2.67039 0 2846 4.00000 2.67039 33.2% - 13s 0 2 2.80000 0 2846 4.00000 2.80000 30.0% - 18s 5 1 cutoff 2 4.00000 3.00000 25.0% 1950 20s Cutting planes: Clique: 69 Zero half: 11 Explored 7 nodes (57317 simplex iterations) in 21.34 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%