Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:44:00 2012 Optimize a model with 14110 rows, 18906 columns and 60552 nonzeros Presolve removed 31 rows and 3975 columns Presolve time: 0.25s Presolved: 14079 rows, 14931 columns, 56373 nonzeros Variable types: 0 continuous, 14931 integer (14931 binary) Found heuristic solution: objective 137.0000000 Root relaxation: objective 2.000000e+00, 9565 iterations, 0.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 137.00000 2.00000 98.5% - 1s H 0 0 72.0000000 2.00000 97.2% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s Cutting planes: Zero half: 1 Explored 0 nodes (30662 simplex iterations) in 1.32 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%