Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:15:35 2013 Optimize a model with 69886 rows, 69056 columns and 275726 nonzeros Presolve removed 83 rows and 0 columns Presolve time: 0.33s Presolved: 69803 rows, 69056 columns, 275643 nonzeros Variable types: 68973 continuous, 83 integer (83 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7557 6.2194928e+04 2.398908e+02 0.000000e+00 5s 7772 6.2208430e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 6.220843e+04, 7772 iterations, 5.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62208.4304 0 59 - 62208.4304 - - 6s H 0 0 93404.000000 62208.4304 33.4% - 8s H 0 0 82870.000000 62208.4304 24.9% - 27s 0 0 74971.7312 0 21 82870.0000 74971.7312 9.53% - 36s 0 0 78282.7138 0 12 82870.0000 78282.7138 5.54% - 41s 0 0 79744.1990 0 8 82870.0000 79744.1990 3.77% - 42s H 0 0 80558.000000 79744.1990 1.01% - 43s 0 0 79769.8844 0 7 80558.0000 79769.8844 0.98% - 43s 0 0 79788.5737 0 6 80558.0000 79788.5737 0.96% - 44s 0 2 79792.6691 0 6 80558.0000 79792.6691 0.95% - 46s H 10 7 80301.000000 79910.6173 0.49% 248 48s H 14 9 80291.000000 79910.6173 0.47% 213 48s H 19 12 80263.000000 79910.6173 0.44% 163 49s * 20 10 17 80146.000000 79910.6173 0.29% 161 49s 26 7 80115.0732 9 1 80146.0000 80114.8235 0.04% 178 50s Cutting planes: Implied bound: 80 Explored 36 nodes (22311 simplex iterations) in 50.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.014600000000e+04, best bound 8.013960968661e+04, gap 0.0080%