Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:45:19 2012 Optimize a model with 55439 rows, 48620 columns and 213838 nonzeros Presolve removed 2660 rows and 3962 columns Presolve time: 1.54s Presolved: 52779 rows, 44658 columns, 202798 nonzeros Variable types: 0 continuous, 44658 integer (44658 binary) Found heuristic solution: objective 220.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 25492 3.0000822e+00 5.150000e+01 0.000000e+00 5s 30182 3.0000878e+00 2.084705e+01 0.000000e+00 10s 34336 3.0000922e+00 1.291775e+01 0.000000e+00 15s 38222 3.0000963e+00 6.824635e+00 0.000000e+00 20s 39921 3.0000000e+00 0.000000e+00 0.000000e+00 22s Root relaxation: objective 3.000000e+00, 39921 iterations, 21.96 seconds Total elapsed time = 65.40s 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% - 69s Explored 0 nodes (115517 simplex iterations) in 69.35 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%