Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:19:41 2012 Optimize a model with 56831 rows, 49506 columns and 218890 nonzeros Presolve removed 23 rows and 4664 columns Presolve time: 1.30s Presolved: 56808 rows, 44842 columns, 213716 nonzeros Variable types: 0 continuous, 44842 integer (44842 binary) Found heuristic solution: objective 222.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 475 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 396 3.00000 2.00000 33.3% - 1s 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (909 simplex iterations) in 1.64 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%