Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:11:03 2012 Optimize a model with 12572 rows, 16256 columns and 53338 nonzeros Presolve removed 33 rows and 3939 columns Presolve time: 0.23s Presolved: 12539 rows, 12317 columns, 49203 nonzeros Variable types: 0 continuous, 12317 integer (12317 binary) Found heuristic solution: objective 127.0000000 Root relaxation: objective 2.000000e+00, 8681 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 0 162 127.00000 2.00000 98.4% - 1s H 0 0 94.0000000 2.00000 97.9% - 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: 5 Explored 0 nodes (28887 simplex iterations) in 1.29 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%