Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:51:52 2013 Optimize a model with 2860 rows, 676260 columns and 1352260 nonzeros Presolve time: 2.80s Presolved: 2860 rows, 676260 columns, 1352260 nonzeros Variable types: 676000 continuous, 260 integer (260 binary) Root relaxation: objective 6.258161e+05, 23473 iterations, 4.93 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 625816.107 0 5 - 625816.107 - - 8s H 0 0 643888.00000 625816.107 2.81% - 10s H 0 0 643222.00000 625816.107 2.71% - 11s H 0 0 628526.00000 625816.107 0.43% - 12s 0 0 625965.771 0 3 628526.000 625965.771 0.41% - 13s 0 0 625965.771 0 5 628526.000 625965.771 0.41% - 18s 0 0 625965.771 0 2 628526.000 625965.771 0.41% - 20s 0 0 625987.737 0 4 628526.000 625987.737 0.40% - 21s 0 0 625988.318 0 3 628526.000 625988.318 0.40% - 21s 0 0 625991.461 0 3 628526.000 625991.461 0.40% - 22s 0 0 625992.038 0 3 628526.000 625992.038 0.40% - 22s 0 0 625992.329 0 2 628526.000 625992.329 0.40% - 23s 0 0 625992.329 0 2 628526.000 625992.329 0.40% - 24s 0 2 626001.304 0 2 628526.000 626001.304 0.40% - 26s 3 5 626277.229 2 3 628526.000 626277.229 0.36% 604 30s H 14 10 626988.00000 626277.229 0.11% 163 32s H 22 12 626713.00000 626277.229 0.07% 106 33s * 23 10 22 626668.00000 626277.229 0.06% 102 33s 31 11 626386.986 3 2 626668.000 626357.059 0.05% 101 35s * 52 5 13 626651.00000 626404.294 0.04% 81.4 37s * 57 0 17 626464.00000 626464.000 0.0% 78.3 37s Cutting planes: Implied bound: 113 Flow cover: 1 Explored 58 nodes (41381 simplex iterations) in 37.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.264640000000e+05, best bound 6.264640000000e+05, gap 0.0%