Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:13:19 2012 Optimize a model with 51061 rows, 44732 columns and 196861 nonzeros Presolve removed 846 rows and 2 columns Presolve time: 1.28s Presolved: 50426 rows, 44730 columns, 238796 nonzeros Variable types: 0 continuous, 44730 integer (44730 binary) Found heuristic solution: objective 211.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 31005 3.0000832e+00 3.784034e+01 0.000000e+00 5s 35721 3.0000884e+00 8.642464e+01 0.000000e+00 10s 40044 3.0000928e+00 2.995000e+02 0.000000e+00 15s 44105 3.0000971e+00 3.148182e+01 0.000000e+00 20s 45316 3.0000000e+00 0.000000e+00 0.000000e+00 21s Root relaxation: objective 3.000000e+00, 45316 iterations, 21.50 seconds Total elapsed time = 55.83s 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% - 59s Explored 0 nodes (113412 simplex iterations) in 59.48 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%