Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:23:50 2012 Optimize a model with 16019 rows, 6972 columns and 54697 nonzeros Presolve removed 1826 rows and 0 columns Presolve time: 0.39s Presolved: 14193 rows, 6972 columns, 50298 nonzeros Variable types: 0 continuous, 6972 integer (6972 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 14003 iterations, 2.56 seconds Total elapsed time = 5.59s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 146 48.00000 3.00000 93.8% - 8s H 0 0 4.0000000 3.00000 25.0% - 8s H 0 0 3.0000000 3.00000 0.0% - 8s Explored 0 nodes (40778 simplex iterations) in 8.69 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%