Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:43:50 2012 Optimize a model with 12375 rows, 18632 columns and 55078 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.20s Presolved: 12509 rows, 18630 columns, 73392 nonzeros Variable types: 0 continuous, 18630 integer (18630 binary) Found heuristic solution: objective 136.0000000 Root relaxation: objective 2.000000e+00, 8523 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 136.00000 2.00000 98.5% - 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: 2 Explored 0 nodes (26995 simplex iterations) in 1.20 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%