Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:43:55 2012 Optimize a model with 55303 rows, 49952 columns and 214747 nonzeros Presolve removed 1340 rows and 2 columns Presolve time: 1.52s Presolved: 54186 rows, 49950 columns, 260647 nonzeros Variable types: 0 continuous, 49950 integer (49950 binary) Found heuristic solution: objective 223.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 28683 3.0000749e+00 5.233333e+01 0.000000e+00 5s 33277 3.0000784e+00 2.071534e+02 0.000000e+00 10s 36787 3.0000814e+00 4.365512e+01 0.000000e+00 15s 40117 3.0000000e+00 0.000000e+00 0.000000e+00 20s Root relaxation: objective 3.000000e+00, 40117 iterations, 19.70 seconds Total elapsed time = 41.91s 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 (86277 simplex iterations) in 43.22 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%