Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:29:46 2012 Optimize a model with 33059 rows, 36290 columns and 134518 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.75s Presolved: 33247 rows, 36288 columns, 170270 nonzeros Variable types: 0 continuous, 36288 integer (36288 binary) Found heuristic solution: objective 190.0000000 Root relaxation: objective 2.000000e+00, 21851 iterations, 1.52 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 286 190.00000 2.00000 98.9% - 4s H 0 0 165.0000000 2.00000 98.8% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.14286 0 8586 4.00000 2.14286 46.4% - 11s 0 0 2.28571 0 4244 4.00000 2.28571 42.9% - 21s 0 0 2.40000 0 7009 4.00000 2.40000 40.0% - 27s H 0 0 3.0000000 2.40000 20.0% - 28s Cutting planes: Zero half: 11 Explored 0 nodes (90657 simplex iterations) in 28.75 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%