Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:56:58 2012 Optimize a model with 31855 rows, 32942 columns and 127603 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.74s Presolved: 32034 rows, 32940 columns, 160012 nonzeros Variable types: 0 continuous, 32940 integer (32940 binary) Found heuristic solution: objective 181.0000000 Root relaxation: objective 2.000000e+00, 19310 iterations, 1.34 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 274 181.00000 2.00000 98.9% - 4s H 0 0 152.0000000 2.00000 98.7% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.25000 0 403 4.00000 2.25000 43.8% - 14s H 0 0 3.0000000 2.25000 25.0% - 14s Cutting planes: Zero half: 9 Explored 0 nodes (78328 simplex iterations) in 14.16 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%