Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:19:45 2012 Optimize a model with 54167 rows, 49506 columns and 210898 nonzeros Presolve removed 471 rows and 5552 columns Presolve time: 1.39s Presolved: 53696 rows, 43954 columns, 203754 nonzeros Variable types: 0 continuous, 43954 integer (43954 binary) Found heuristic solution: objective 222.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 33912 3.0000934e+00 2.066176e+01 0.000000e+00 5s 38367 3.0000972e+00 5.086498e+01 0.000000e+00 10s 42417 3.0001014e+00 1.769367e+01 0.000000e+00 15s 46737 3.0001060e+00 4.530398e+00 0.000000e+00 20s 50922 3.0001122e+00 1.778549e+00 0.000000e+00 25s 51101 3.0000000e+00 0.000000e+00 0.000000e+00 25s Root relaxation: objective 3.000000e+00, 51101 iterations, 25.28 seconds Total elapsed time = 54.38s 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% - 55s Explored 0 nodes (109600 simplex iterations) in 55.54 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%