Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:29:22 2013 Optimize a model with 51262 rows, 50552 columns and 201782 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.23s Presolved: 51191 rows, 50552 columns, 201711 nonzeros Variable types: 50481 continuous, 71 integer (71 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7443 6.5073795e+04 7.084564e+02 0.000000e+00 5s 7901 6.5149490e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 6.514949e+04, 7901 iterations, 5.87 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65149.4900 0 57 - 65149.4900 - - 6s H 0 0 104192.00000 65149.4900 37.5% - 10s 0 0 86938.0811 0 12 104192.000 86938.0811 16.6% - 19s H 0 0 97556.000000 86938.0811 10.9% - 19s 0 0 88626.0671 0 4 97556.0000 88626.0671 9.15% - 20s H 0 0 91840.855469 88626.0671 3.50% - 20s H 0 0 91400.000000 88626.0671 3.03% - 20s H 0 0 88813.000000 88626.0671 0.21% - 20s 0 0 88673.4354 0 3 88813.0000 88673.4354 0.16% - 20s 0 0 88685.3514 0 3 88813.0000 88685.3514 0.14% - 21s 0 0 88693.4550 0 3 88813.0000 88693.4550 0.13% - 21s 0 0 88693.4550 0 52 88813.0000 88693.4550 0.13% - 28s 0 0 88693.4550 0 8 88813.0000 88693.4550 0.13% - 33s 0 0 88693.4550 0 4 88813.0000 88693.4550 0.13% - 34s 0 0 88693.4550 0 4 88813.0000 88693.4550 0.13% - 35s 0 0 88693.4550 0 3 88813.0000 88693.4550 0.13% - 36s 0 2 88696.6747 0 3 88813.0000 88696.6747 0.13% - 38s * 16 4 7 88805.000000 88741.6660 0.07% 103 39s Cutting planes: Gomory: 3 Implied bound: 58 Explored 23 nodes (31468 simplex iterations) in 39.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.880500000000e+04, best bound 8.880500000000e+04, gap 0.0%