Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:02:47 2012 Optimize a model with 13067 rows, 17556 columns and 56098 nonzeros Presolve removed 32 rows and 3962 columns Presolve time: 0.24s Presolved: 13035 rows, 13594 columns, 51940 nonzeros Variable types: 0 continuous, 13594 integer (13594 binary) Found heuristic solution: objective 132.0000000 Root relaxation: objective 2.000000e+00, 8899 iterations, 0.32 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 132.00000 2.00000 98.5% - 1s H 0 0 124.0000000 2.00000 98.4% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Cutting planes: Gomory: 1 Zero half: 6 Explored 0 nodes (30562 simplex iterations) in 1.28 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%