Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:11:37 2013 Optimize a model with 60214 rows, 59444 columns and 237314 nonzeros Presolve removed 77 rows and 0 columns Presolve time: 0.28s Presolved: 60137 rows, 59444 columns, 237237 nonzeros Variable types: 59367 continuous, 77 integer (77 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7907 6.3130507e+04 4.314193e+02 0.000000e+00 5s 8048 6.3135921e+04 0.000000e+00 0.000000e+00 5s Root relaxation: objective 6.313592e+04, 8048 iterations, 5.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63135.9211 0 57 - 63135.9211 - - 5s H 0 0 120857.00000 63135.9211 47.8% - 12s 0 0 81621.8083 0 16 120857.000 81621.8083 32.5% - 25s H 0 0 111520.87859 81621.8083 26.8% - 25s H 0 0 99383.000000 81621.8083 17.9% - 26s 0 0 88093.4694 0 6 99383.0000 88093.4694 11.4% - 28s H 0 0 98982.633504 88093.4694 11.0% - 28s H 0 0 97192.000000 88093.4694 9.36% - 28s 0 0 88454.3101 0 5 97192.0000 88454.3101 8.99% - 29s H 0 0 95494.000000 88454.3101 7.37% - 29s H 0 0 88597.000000 88454.3101 0.16% - 30s 0 2 88511.0418 0 5 88597.0000 88511.0418 0.10% - 31s * 6 4 5 88582.000000 88526.4798 0.06% 101 31s Cutting planes: Implied bound: 73 Explored 11 nodes (20000 simplex iterations) in 31.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.858200000000e+04, best bound 8.858200000000e+04, gap 0.0%