Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:51:16 2012 Optimize a model with 17639 rows, 21756 columns and 73939 nonzeros Presolve removed 29 rows and 3971 columns Presolve time: 0.36s Presolved: 17610 rows, 17785 columns, 69730 nonzeros Variable types: 0 continuous, 17785 integer (17785 binary) Found heuristic solution: objective 147.0000000 Root relaxation: objective 2.000000e+00, 12572 iterations, 0.62 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 188 147.00000 2.00000 98.6% - 2s H 0 0 135.0000000 2.00000 98.5% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Gomory: 1 Explored 0 nodes (41111 simplex iterations) in 2.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%