Gurobi 5.0.1 (linux64) logging started Sat Nov 17 05:03:48 2012 Optimize a model with 61062 rows, 51756 columns and 233808 nonzeros Presolve removed 910 rows and 2 columns Presolve time: 1.62s Presolved: 60379 rows, 51754 columns, 282537 nonzeros Variable types: 0 continuous, 51754 integer (51754 binary) Found heuristic solution: objective 227.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 36429 3.0000961e+00 1.395762e+03 0.000000e+00 5s 43331 3.0001133e+00 6.850000e+02 0.000000e+00 10s 50169 3.0001271e+00 4.568571e+02 0.000000e+00 15s 56760 3.0001374e+00 9.611111e+01 0.000000e+00 20s 61213 3.0001431e+00 9.150000e+01 0.000000e+00 25s 65216 3.0001485e+00 7.824918e+01 0.000000e+00 30s 68695 3.0001520e+00 1.730798e+01 0.000000e+00 35s 69625 3.0000000e+00 0.000000e+00 0.000000e+00 37s Root relaxation: objective 3.000000e+00, 69625 iterations, 37.00 seconds Total elapsed time = 75.94s Total elapsed time = 85.01s 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% - 89s Explored 0 nodes (150426 simplex iterations) in 89.73 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%