Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:35:58 2013 Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros Presolve removed 100 rows and 1300 columns Presolve time: 0.50s Presolved: 2100 rows, 102500 columns, 212900 nonzeros Variable types: 102100 continuous, 400 integer (400 binary) Root relaxation: objective 9.188392e+05, 6349 iterations, 0.72 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 8 - 918839.221 - - 1s H 0 0 1111274.5456 918839.221 17.3% - 1s 0 0 918950.735 0 8 1111274.55 918950.735 17.3% - 2s 0 0 918989.983 0 6 1111274.55 918989.983 17.3% - 2s H 0 0 932837.96096 918989.983 1.48% - 3s 0 0 918993.852 0 6 932837.961 918993.852 1.48% - 3s 0 0 918995.846 0 4 932837.961 918995.846 1.48% - 3s 0 0 918996.110 0 4 932837.961 918996.110 1.48% - 4s 0 0 918997.313 0 6 932837.961 918997.313 1.48% - 4s 0 0 918997.316 0 4 932837.961 918997.316 1.48% - 4s 0 0 918997.316 0 4 932837.961 918997.316 1.48% - 5s 0 0 918997.316 0 4 932837.961 918997.316 1.48% - 6s 0 2 918997.327 0 4 932837.961 918997.327 1.48% - 7s 14 16 919334.600 13 2 932837.961 919059.236 1.48% 72.8 10s H 27 14 919941.52890 919059.236 0.10% 38.9 12s 84 18 919073.544 2 4 919941.529 919073.544 0.09% 18.2 15s * 93 11 11 919369.63105 919114.684 0.03% 19.7 16s Cutting planes: Flow cover: 18 Explored 97 nodes (10682 simplex iterations) in 17.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193696310472e+05, best bound 9.192779831077e+05, gap 0.0100%