Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:07:37 2012 Optimize a model with 12479 rows, 4290 columns and 41403 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.36s Presolved: 12542 rows, 4288 columns, 45244 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 2.000000e+00, 2831 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 130 65.00000 2.00000 96.9% - 0s H 0 0 64.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 781 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 1980 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.66667 0 166 4.00000 2.66667 33.3% - 7s 0 0 2.67021 0 3127 4.00000 2.67021 33.2% - 9s 0 0 2.67021 0 3272 4.00000 2.67021 33.2% - 10s 0 0 2.67021 0 3186 4.00000 2.67021 33.2% - 12s 0 0 2.67021 0 3267 4.00000 2.67021 33.2% - 14s 0 0 2.67021 0 3174 4.00000 2.67021 33.2% - 16s 0 0 2.67021 0 3128 4.00000 2.67021 33.2% - 17s 0 0 2.67021 0 3127 4.00000 2.67021 33.2% - 18s 0 0 2.67021 0 3111 4.00000 2.67021 33.2% - 20s 0 0 2.67021 0 3101 4.00000 2.67021 33.2% - 22s 0 0 2.67021 0 3089 4.00000 2.67021 33.2% - 24s 0 0 2.67021 0 3089 4.00000 2.67021 33.2% - 25s 0 2 2.80000 0 3089 4.00000 2.80000 30.0% - 30s Cutting planes: Clique: 55 Zero half: 6 Explored 9 nodes (89217 simplex iterations) in 34.43 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%