Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:40:08 2013 Optimize a model with 2600 rows, 105900 columns and 242200 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.31s Presolved: 2500 rows, 105800 columns, 237100 nonzeros Variable types: 105200 continuous, 600 integer (600 binary) Root relaxation: objective 9.188392e+05, 5901 iterations, 0.46 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 - - 0s 0 0 918934.953 0 12 - 918934.953 - - 1s 0 0 918953.537 0 10 - 918953.537 - - 1s 0 0 918958.673 0 10 - 918958.673 - - 2s 0 0 918962.639 0 10 - 918962.639 - - 2s 0 0 918963.707 0 13 - 918963.707 - - 2s 0 0 918964.903 0 10 - 918964.903 - - 2s 0 0 918965.967 0 10 - 918965.967 - - 3s 0 0 918966.474 0 10 - 918966.474 - - 3s 0 0 918967.300 0 10 - 918967.300 - - 4s 0 0 918967.300 0 10 - 918967.300 - - 5s H 0 0 962669.05093 918967.300 4.54% - 6s 0 2 918974.577 0 10 962669.051 918974.577 4.54% - 6s 17 19 919467.102 15 3 962669.051 919059.126 4.53% 76.2 10s H 27 19 924748.87432 919059.126 0.62% 52.5 12s 54 21 920265.186 51 3 924748.874 919059.126 0.62% 31.3 15s 116 46 922189.740 113 1 924748.874 919059.126 0.62% 19.0 20s H 135 31 922217.06678 919059.126 0.34% 16.6 21s H 162 9 919372.82014 919059.753 0.03% 19.2 23s 186 17 919303.769 8 3 919372.820 919061.531 0.03% 20.2 25s Cutting planes: Flow cover: 26 Explored 207 nodes (13192 simplex iterations) in 25.66 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%