Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:19:01 2013 Optimize a model with 2600 rows, 113600 columns and 291300 nonzeros Presolve removed 100 rows and 2900 columns Presolve time: 0.56s Presolved: 2500 rows, 110700 columns, 281300 nonzeros Variable types: 110100 continuous, 600 integer (600 binary) Root relaxation: objective 9.188392e+05, 6249 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 12 - 918839.221 - - 1s 0 0 918935.196 0 12 - 918935.196 - - 2s 0 0 918961.548 0 9 - 918961.548 - - 2s 0 0 918965.968 0 9 - 918965.968 - - 3s 0 0 918968.431 0 9 - 918968.431 - - 3s 0 0 918970.668 0 12 - 918970.668 - - 3s 0 0 918971.193 0 12 - 918971.193 - - 4s 0 0 918972.252 0 9 - 918972.252 - - 4s 0 0 918972.845 0 9 - 918972.845 - - 5s 0 0 918972.995 0 9 - 918972.995 - - 5s 0 0 918973.243 0 12 - 918973.243 - - 6s 0 0 918973.243 0 12 - 918973.243 - - 8s H 0 0 927125.41606 918973.243 0.88% - 8s 0 2 918976.034 0 12 927125.416 918976.034 0.88% - 9s 2 4 918999.265 2 8 927125.416 918999.265 0.88% 342 10s 27 29 919291.350 25 3 927125.416 919025.175 0.87% 66.8 15s * 47 13 45 919372.82014 919025.175 0.04% 39.4 17s 84 18 919261.010 9 5 919372.820 919261.010 0.01% 43.4 20s Cutting planes: Flow cover: 24 Explored 106 nodes (13116 simplex iterations) in 20.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193728201368e+05, best bound 9.192986129588e+05, gap 0.0081%