Gurobi 5.0.1 (linux64) logging started Sat Nov 17 11:25:17 2012 Optimize a model with 81343 rows, 61752 columns and 304542 nonzeros Presolve removed 1995 rows and 2728 columns (presolve time = 5s) ... Presolve removed 1997 rows and 2730 columns Presolve time: 7.40s Presolved: 79346 rows, 59022 columns, 296214 nonzeros Variable types: 0 continuous, 59022 integer (59022 binary) Found heuristic solution: objective 248.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 32090 3.0000973e+00 3.010345e+01 0.000000e+00 5s 35634 3.0001038e+00 7.672121e+01 0.000000e+00 10s 38210 3.0001053e+00 3.152324e+02 0.000000e+00 15s 41108 3.0001070e+00 4.422298e+01 0.000000e+00 20s 43684 3.0001085e+00 1.667544e+01 0.000000e+00 25s 46421 3.0001100e+00 1.550656e+02 0.000000e+00 30s 49158 3.0001117e+00 8.885496e+01 0.000000e+00 35s 51573 3.0001127e+00 2.088747e+01 0.000000e+00 40s 54310 3.0001143e+00 6.584640e+01 0.000000e+00 45s 56725 3.0001155e+00 2.237661e+01 0.000000e+00 50s 59301 3.0001172e+00 1.343581e+01 0.000000e+00 55s 61877 3.0001187e+00 1.842479e+01 0.000000e+00 60s 64292 3.0001202e+00 2.948778e+01 0.000000e+00 65s 66707 3.0001225e+00 1.275962e+01 0.000000e+00 70s 69605 3.0001271e+00 5.214008e+00 0.000000e+00 75s 72020 3.0001300e+00 2.308977e+01 0.000000e+00 80s 73273 3.0000000e+00 0.000000e+00 0.000000e+00 83s Root relaxation: objective 3.000000e+00, 73273 iterations, 82.91 seconds Total elapsed time = 207.08s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 162 248.00000 3.00000 98.8% - 210s H 0 0 4.0000000 3.00000 25.0% - 210s H 0 0 3.0000000 3.00000 0.0% - 210s Explored 0 nodes (177292 simplex iterations) in 210.56 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%