Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:18:01 2012 Optimize a model with 57149 rows, 50850 columns and 221173 nonzeros Presolve removed 21 rows and 4277 columns Presolve time: 1.28s Presolved: 57128 rows, 46573 columns, 216390 nonzeros Variable types: 0 continuous, 46573 integer (46573 binary) Found heuristic solution: objective 225.0000000 Root relaxation: objective 2.000000e+00, 34092 iterations, 3.28 seconds Total elapsed time = 8.90s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 392 225.00000 2.00000 99.1% - 10s H 0 0 165.0000000 2.00000 98.8% - 10s H 0 0 4.0000000 2.00000 50.0% - 10s H 0 0 3.0000000 2.00000 33.3% - 10s 0 0 infeasible 0 3.00000 2.00000 33.3% - 10s Cutting planes: Gomory: 2 Clique: 2 Zero half: 39 Explored 0 nodes (112989 simplex iterations) in 10.85 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%