Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:25:19 2012 Optimize a model with 61424 rows, 50850 columns and 233998 nonzeros Presolve removed 452 rows and 2 columns Presolve time: 4.44s Presolved: 61197 rows, 50848 columns, 282956 nonzeros Variable types: 0 continuous, 50848 integer (50848 binary) Found heuristic solution: objective 225.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 27080 3.0000897e+00 2.376471e+01 0.000000e+00 5s 31084 3.0000932e+00 1.551536e+01 0.000000e+00 10s 34659 3.0000967e+00 1.046415e+02 0.000000e+00 15s 38234 3.0001001e+00 4.146429e+01 0.000000e+00 20s 41523 3.0001041e+00 3.627683e+01 0.000000e+00 25s 44955 3.0001077e+00 1.344762e+02 0.000000e+00 30s 48387 3.0001121e+00 6.405011e+00 0.000000e+00 35s 49215 3.0000000e+00 0.000000e+00 0.000000e+00 37s Root relaxation: objective 3.000000e+00, 49215 iterations, 36.59 seconds Total elapsed time = 70.25s Total elapsed time = 76.34s 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% - 76s Explored 0 nodes (135421 simplex iterations) in 76.59 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%