Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:51:54 2012 Optimize a model with 18055 rows, 22052 columns and 75478 nonzeros Presolve removed 33 rows and 4590 columns Presolve time: 0.35s Presolved: 18022 rows, 17462 columns, 70646 nonzeros Variable types: 0 continuous, 17462 integer (17462 binary) Found heuristic solution: objective 148.0000000 Root relaxation: objective 2.000000e+00, 12656 iterations, 0.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 196 148.00000 2.00000 98.6% - 2s H 0 0 131.0000000 2.00000 98.5% - 2s H 0 0 4.0000000 2.00000 50.0% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Gomory: 1 Explored 0 nodes (40576 simplex iterations) in 2.29 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%