Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:43:09 2013 Optimize a model with 54166 rows, 53436 columns and 213306 nonzeros Presolve removed 73 rows and 0 columns Presolve time: 0.24s Presolved: 54093 rows, 53436 columns, 213233 nonzeros Variable types: 53363 continuous, 73 integer (73 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 6471 5.8467012e+04 0.000000e+00 0.000000e+00 5s Root relaxation: objective 5.846701e+04, 6471 iterations, 5.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58467.0117 0 62 - 58467.0117 - - 5s H 0 0 90978.000000 58467.0117 35.7% - 8s 0 0 71062.9810 0 16 90978.0000 71062.9810 21.9% - 15s H 0 0 82873.000000 71062.9810 14.3% - 15s 0 0 71590.5784 0 6 82873.0000 71590.5784 13.6% - 16s H 0 0 77999.971509 71590.5784 8.22% - 16s H 0 0 76920.000000 71590.5784 6.93% - 17s 0 0 71607.8438 0 4 76920.0000 71607.8438 6.91% - 17s H 0 0 73230.800984 71607.8438 2.22% - 17s H 0 0 72690.000000 71607.8438 1.49% - 17s H 0 0 72293.000000 71607.8438 0.95% - 18s 0 2 71629.4890 0 4 72293.0000 71629.4890 0.92% - 18s H 3 2 72041.408036 71772.8080 0.37% 72.0 19s H 5 4 71941.047619 71776.0000 0.23% 77.8 19s H 10 3 71900.722222 71778.1302 0.17% 118 19s * 11 2 9 71847.000000 71778.1302 0.10% 146 19s Cutting planes: Implied bound: 71 Explored 14 nodes (14395 simplex iterations) in 19.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.184700000000e+04, best bound 7.184700000000e+04, gap 0.0%