Gurobi 5.0.1 (linux64) logging started Tue Dec 4 14:33:19 2012 Optimize a model with 494207 rows, 492804 columns and 2954014 nonzeros Presolve removed 0 rows and 1 columns (presolve time = 7s) ... Presolve removed 0 rows and 1 columns (presolve time = 11s) ... Presolve removed 0 rows and 1 columns (presolve time = 17s) ... Presolve removed 701 rows and 1 columns (presolve time = 21s) ... Presolve removed 701 rows and 1 columns (presolve time = 27s) ... Presolve removed 701 rows and 1 columns (presolve time = 31s) ... Presolve removed 701 rows and 1 columns (presolve time = 37s) ... Presolve removed 701 rows and 1 columns (presolve time = 40s) ... Presolve removed 701 rows and 1 columns Presolve time: 43.79s Presolved: 493506 rows, 492803 columns, 2951210 nonzeros Variable types: 701 continuous, 492102 integer (492102 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 5059 7.8881000e+04 3.732267e+02 0.000000e+00 5s 6413 7.9081000e+04 5.877498e+01 0.000000e+00 11s 6824 7.9081000e+04 0.000000e+00 0.000000e+00 14s Root relaxation: objective 7.908100e+04, 6824 iterations, 14.33 seconds Total elapsed time = 105.39s Total elapsed time = 143.94s Total elapsed time = 181.38s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 79081.0000 0 87 - 79081.0000 - - 185s 0 0 79081.0000 0 143 - 79081.0000 - - 274s 0 0 79081.0000 0 79 - 79081.0000 - - 424s 0 0 79081.0000 0 62 - 79081.0000 - - 542s H 0 0 79481.000000 79081.0000 0.50% - 590s H 0 0 79081.000000 79081.0000 0.0% - 641s Cutting planes: Gomory: 1 Explored 0 nodes (46475 simplex iterations) in 641.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.908100000000e+04, best bound 7.908100000000e+04, gap 0.0%