Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:25:45 2012 Optimize a model with 3870 rows, 1892 columns and 13330 nonzeros Presolve removed 1076 rows and 43 columns Presolve time: 0.08s Presolved: 2794 rows, 1849 columns, 10750 nonzeros Variable types: 0 continuous, 1849 integer (1849 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 3.000000e+00, 2978 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 61 22.00000 3.00000 86.4% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (6617 simplex iterations) in 0.43 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%