Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:10:22 2012 Optimize a model with 8855 rows, 2970 columns and 29266 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.18s Presolved: 8853 rows, 2968 columns, 28938 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2188 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 108 54.00000 2.00000 96.3% - 0s H 0 0 45.0000000 2.00000 95.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 505 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 1176 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 151 5.00000 2.66667 46.7% - 6s H 0 0 4.0000000 2.66667 33.3% - 6s 0 0 2.67097 0 2602 4.00000 2.67097 33.2% - 9s 0 0 2.67097 0 2616 4.00000 2.67097 33.2% - 10s 0 0 2.67097 0 2586 4.00000 2.67097 33.2% - 13s 0 0 2.67097 0 2534 4.00000 2.67097 33.2% - 15s 0 0 2.67097 0 2436 4.00000 2.67097 33.2% - 18s 0 0 2.67097 0 2440 4.00000 2.67097 33.2% - 21s 0 0 2.67097 0 2587 4.00000 2.67097 33.2% - 24s 0 0 2.67097 0 2596 4.00000 2.67097 33.2% - 26s 0 0 2.67097 0 2596 4.00000 2.67097 33.2% - 28s 0 2 2.80000 0 2596 4.00000 2.80000 30.0% - 37s Cutting planes: Gomory: 1 Clique: 90 Zero half: 4 Explored 7 nodes (111427 simplex iterations) in 39.87 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%