Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:11:17 2013 Optimize a model with 82239 rows, 6241 columns and 249640 nonzeros Presolve removed 4411 rows and 3135 columns Presolve time: 0.41s Presolved: 77828 rows, 3106 columns, 236676 nonzeros Variable types: 42 continuous, 3064 integer (3064 binary) Found heuristic solution: objective 145204.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 40517 9.7847826e+04 0.000000e+00 3.091946e+05 5s 41737 9.7878625e+04 0.000000e+00 0.000000e+00 5s 41737 9.7878625e+04 0.000000e+00 0.000000e+00 5s Root relaxation: objective 9.787862e+04, 41737 iterations, 5.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 97878.6250 0 14 145204.000 97878.6250 32.6% - 6s H 0 0 97904.000000 97878.6250 0.03% - 6s H 0 0 97898.000000 97878.6250 0.02% - 6s H 0 0 97894.000000 97878.6250 0.02% - 6s 0 0 97879.0503 0 43 97894.0000 97879.0503 0.02% - 7s 0 0 97879.0503 0 14 97894.0000 97879.0503 0.02% - 8s H 0 0 97893.000000 97879.0503 0.01% - 8s H 0 0 97890.000000 97879.0503 0.01% - 8s 0 0 97879.0503 0 44 97890.0000 97879.0503 0.01% - 8s 0 1 97879.0508 0 38 97890.0000 97879.0508 0.01% - 8s 15 13 97879.8000 11 39 97890.0000 97879.7143 0.01% 732 10s H 285 193 97887.000000 97879.8000 0.01% 83.6 11s Cutting planes: Gomory: 8 Cover: 2 MIR: 28 Zero half: 12 Explored 285 nodes (74689 simplex iterations) in 11.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.788700000000e+04, best bound 9.788000000000e+04, gap 0.0072%