Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:54:23 2012 Optimize a model with 13860 rows, 17556 columns and 58608 nonzeros Presolve removed 23 rows and 3036 columns Presolve time: 0.25s Presolved: 13837 rows, 14520 columns, 55572 nonzeros Variable types: 0 continuous, 14520 integer (14520 binary) Found heuristic solution: objective 41.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 17133 iterations, 2.31 seconds Total elapsed time = 5.43s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 164 3.00000 2.00000 33.3% - 6s 0 0 2.00000 0 296 3.00000 2.00000 33.3% - 11s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 25s 0 0 2.00000 0 303 3.00000 2.00000 33.3% - 38s 0 0 2.00000 0 164 3.00000 2.00000 33.3% - 48s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 57s 0 0 2.00000 0 279 3.00000 2.00000 33.3% - 67s 0 0 2.00000 0 304 3.00000 2.00000 33.3% - 82s 0 0 2.00000 0 304 3.00000 2.00000 33.3% - 87s 0 2 2.00000 0 304 3.00000 2.00000 33.3% - 100s 4 4 2.00000 1 164 3.00000 2.00000 33.3% 6048 108s 5 5 2.00000 1 164 3.00000 2.00000 33.3% 4839 118s 6 6 2.00000 1 164 3.00000 2.00000 33.3% 4032 132s 7 6 2.00000 1 168 3.00000 2.00000 33.3% 3456 151s 9 8 2.00000 1 168 3.00000 2.00000 33.3% 2688 156s 10 8 infeasible 15 3.00000 2.00000 33.3% 18286 161s Cutting planes: Gomory: 3 Zero half: 4 Explored 12 nodes (428772 simplex iterations) in 164.33 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%