Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:04:20 2012 Optimize a model with 7236 rows, 2970 columns and 24462 nonzeros Presolve removed 1674 rows and 0 columns Presolve time: 0.13s Presolved: 5562 rows, 2970 columns, 20520 nonzeros Variable types: 0 continuous, 2970 integer (2970 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 3.000000e+00, 4259 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 64 34.00000 3.00000 91.2% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 174 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 137 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 163 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 119 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 118 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 154 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 154 4.00000 3.00000 25.0% - 20s 0 2 3.00000 0 154 4.00000 3.00000 25.0% - 22s 5 5 3.00000 1 90 4.00000 3.00000 25.0% 625 27s 7 6 3.00000 1 91 4.00000 3.00000 25.0% 447 33s 8 7 3.00000 1 159 4.00000 3.00000 25.0% 391 35s 10 8 3.00000 1 172 4.00000 3.00000 25.0% 313 42s 13 10 infeasible 13 4.00000 3.00000 25.0% 8254 47s 17 11 3.00000 15 86 4.00000 3.00000 25.0% 6416 50s Cutting planes: Gomory: 2 Zero half: 4 Explored 27 nodes (234397 simplex iterations) in 54.81 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%