Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:45:48 2012 Optimize a model with 59540 rows, 49952 columns and 227458 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 1.51s Presolved: 59761 rows, 49950 columns, 276653 nonzeros Variable types: 0 continuous, 49950 integer (49950 binary) Found heuristic solution: objective 223.0000000 Root relaxation: objective 2.000000e+00, 32853 iterations, 3.19 seconds Total elapsed time = 9.05s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 372 223.00000 2.00000 99.1% - 10s H 0 0 193.0000000 2.00000 99.0% - 10s H 0 0 4.0000000 2.00000 50.0% - 10s 0 0 2.20000 0 10759 4.00000 2.20000 45.0% - 49s 0 0 2.40000 0 6802 4.00000 2.40000 40.0% - 86s H 0 0 3.0000000 2.40000 20.0% - 87s Cutting planes: Zero half: 11 Explored 0 nodes (154778 simplex iterations) in 87.35 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%