Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:23:29 2012 Optimize a model with 58724 rows, 50850 columns and 225898 nonzeros Presolve removed 452 rows and 2 columns Presolve time: 1.47s Presolved: 58497 rows, 50848 columns, 274880 nonzeros Variable types: 0 continuous, 50848 integer (50848 binary) Found heuristic solution: objective 225.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 34480 3.0000855e+00 3.612500e+01 0.000000e+00 5s 41153 3.0000906e+00 6.311473e+01 0.000000e+00 10s 45353 3.0000922e+00 8.963543e+00 0.000000e+00 15s 49833 3.0000935e+00 6.692105e+01 0.000000e+00 20s 50854 3.0000000e+00 0.000000e+00 0.000000e+00 21s Root relaxation: objective 3.000000e+00, 50854 iterations, 20.95 seconds Total elapsed time = 42.51s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 43s Explored 0 nodes (95871 simplex iterations) in 43.51 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%