Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:35:10 2012 Optimize a model with 12240 rows, 18632 columns and 54808 nonzeros Presolve removed 35 rows and 4760 columns Presolve time: 0.22s Presolved: 12205 rows, 13872 columns, 50048 nonzeros Variable types: 0 continuous, 13872 integer (13872 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 2.000000e+00, 18758 iterations, 3.01 seconds Total elapsed time = 6.44s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 39.00000 2.00000 94.9% - 7s H 0 0 4.0000000 2.00000 50.0% - 7s 0 0 2.00000 0 520 4.00000 2.00000 50.0% - 11s H 0 0 3.0000000 2.00000 33.3% - 11s 0 0 2.00000 0 326 3.00000 2.00000 33.3% - 20s 0 0 2.00000 0 240 3.00000 2.00000 33.3% - 27s 0 0 2.00000 0 238 3.00000 2.00000 33.3% - 38s 0 0 2.00000 0 273 3.00000 2.00000 33.3% - 46s 0 0 2.00000 0 136 3.00000 2.00000 33.3% - 50s 0 0 2.00000 0 242 3.00000 2.00000 33.3% - 59s 0 0 2.00000 0 273 3.00000 2.00000 33.3% - 67s 0 0 2.00000 0 136 3.00000 2.00000 33.3% - 73s 0 0 2.00000 0 236 3.00000 2.00000 33.3% - 81s 0 0 2.00000 0 236 3.00000 2.00000 33.3% - 84s 0 2 2.00000 0 236 3.00000 2.00000 33.3% - 89s 2 3 2.00000 1 236 3.00000 2.00000 33.3% 9070 91s 4 4 2.00000 1 136 3.00000 2.00000 33.3% 4535 97s 5 5 2.00000 1 240 3.00000 2.00000 33.3% 3628 106s 6 6 2.00000 1 240 3.00000 2.00000 33.3% 3023 116s 7 6 2.00000 1 136 3.00000 2.00000 33.3% 2591 126s 8 7 2.00000 1 136 3.00000 2.00000 33.3% 2268 137s 9 8 2.00000 1 136 3.00000 2.00000 33.3% 2016 147s 10 8 2.00000 1 136 3.00000 2.00000 33.3% 1814 163s 11 9 2.00000 1 136 3.00000 2.00000 33.3% 1649 171s 13 10 infeasible 14 3.00000 2.00000 33.3% 19949 186s Cutting planes: Gomory: 10 Zero half: 1 Explored 15 nodes (569500 simplex iterations) in 186.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%