Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:12:02 2012 Optimize a model with 5291 rows, 2450 columns and 18079 nonzeros Presolve removed 933 rows and 2 columns Presolve time: 0.11s Presolved: 4407 rows, 2448 columns, 18195 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 3.000000e+00, 3631 iterations, 0.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 480 49.00000 3.00000 93.9% - 1s H 0 0 21.0000000 3.00000 85.7% - 1s H 0 0 6.0000000 3.00000 50.0% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 113 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 119 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 20 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 20 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 9s 0 2 3.00000 0 90 4.00000 3.00000 25.0% - 10s 4 4 3.00000 1 20 4.00000 3.00000 25.0% 685 15s 7 6 3.00000 1 66 4.00000 3.00000 25.0% 391 23s 9 8 3.00000 1 246 4.00000 3.00000 25.0% 304 30s 13 10 3.00000 10 106 4.00000 3.00000 25.0% 5928 36s 36 2 infeasible 15 4.00000 3.00000 25.0% 2432 40s Cutting planes: Gomory: 2 Zero half: 13 Explored 38 nodes (150232 simplex iterations) in 40.13 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%