Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:30:17 2013 Optimize a model with 2400 rows, 103200 columns and 208100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.60s Presolved: 2200 rows, 102900 columns, 205800 nonzeros Variable types: 102000 continuous, 900 integer (900 binary) Root relaxation: objective 7.918217e+05, 8893 iterations, 0.89 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 791821.709 0 2 - 791821.709 - - 1s H 0 0 924415.35381 791821.709 14.3% - 2s H 0 0 801517.93305 791821.709 1.21% - 3s 0 0 791887.369 0 2 801517.933 791887.369 1.20% - 3s 0 0 791953.766 0 2 801517.933 791953.766 1.19% - 3s 0 0 791953.766 0 2 801517.933 791953.766 1.19% - 4s 0 0 791953.766 0 2 801517.933 791953.766 1.19% - 4s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 4s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 5s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 5s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 6s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 6s 0 0 791961.012 0 2 801517.933 791961.012 1.19% - 7s 0 2 792031.777 0 2 801517.933 792031.777 1.18% - 8s 13 15 792903.672 12 1 801517.933 792666.717 1.10% 63.8 10s * 35 13 34 793505.77764 792666.717 0.11% 53.0 13s 42 14 792940.639 7 1 793505.778 792785.653 0.09% 49.9 15s 113 26 793484.318 18 1 793505.778 792822.399 0.09% 42.2 20s * 118 8 6 793200.24980 792999.852 0.03% 43.4 20s Cutting planes: Flow cover: 19 Explored 132 nodes (15640 simplex iterations) in 21.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.932002498024e+05, best bound 7.931656181712e+05, gap 0.0044%