Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:51:53 2012 Optimize a model with 77804 rows, 61256 columns and 293434 nonzeros Presolve removed 1254 rows and 4693 columns (presolve time = 5s) ... Presolve removed 1256 rows and 4695 columns Presolve time: 6.53s Presolved: 76548 rows, 56561 columns, 285157 nonzeros Variable types: 0 continuous, 56561 integer (56561 binary) Found heuristic solution: objective 247.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 37268 3.0001289e+00 3.625714e+02 0.000000e+00 5s 41109 3.0001518e+00 7.670000e+01 0.000000e+00 10s 44585 3.0001627e+00 4.077273e+01 0.000000e+00 15s 49325 3.0001739e+00 3.672059e+01 0.000000e+00 20s 53591 3.0001778e+00 5.786235e+02 0.000000e+00 25s 55645 3.0001811e+00 3.161427e+02 0.000000e+00 30s 57857 3.0001845e+00 9.623530e+00 0.000000e+00 35s 60069 3.0001872e+00 4.378526e+01 0.000000e+00 40s 62281 3.0001906e+00 7.979126e+01 0.000000e+00 45s 64651 3.0001938e+00 2.578217e+01 0.000000e+00 50s 67021 3.0001976e+00 2.497866e+02 0.000000e+00 55s 69391 3.0002009e+00 3.210901e+02 0.000000e+00 60s 71919 3.0002061e+00 3.486353e+01 0.000000e+00 65s 74289 3.0002080e+00 3.356212e+00 0.000000e+00 70s 74885 3.0000000e+00 0.000000e+00 0.000000e+00 72s Root relaxation: objective 3.000000e+00, 74885 iterations, 71.56 seconds Total elapsed time = 136.09s Total elapsed time = 144.94s Total elapsed time = 148.65s Total elapsed time = 155.42s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 140 247.00000 3.00000 98.8% - 155s H 0 0 3.0000000 3.00000 0.0% - 155s Explored 0 nodes (198844 simplex iterations) in 155.92 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%