Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:16:11 2013 Optimize a model with 60214 rows, 59444 columns and 237314 nonzeros Presolve removed 77 rows and 0 columns Presolve time: 0.27s Presolved: 60137 rows, 59444 columns, 237237 nonzeros Variable types: 59367 continuous, 77 integer (77 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 6790 6.1986193e+04 3.662208e+01 0.000000e+00 5s 6874 6.1988219e+04 0.000000e+00 0.000000e+00 5s Root relaxation: objective 6.198822e+04, 6874 iterations, 5.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61988.2191 0 49 - 61988.2191 - - 5s H 0 0 93699.000000 61988.2191 33.8% - 7s H 0 0 86051.000000 61988.2191 28.0% - 22s 0 0 78116.4588 0 21 86051.0000 78116.4588 9.22% - 31s 0 0 80573.2699 0 7 86051.0000 80573.2699 6.37% - 34s 0 0 80797.8431 0 4 86051.0000 80797.8431 6.10% - 34s H 0 0 84848.377262 80797.8431 4.77% - 35s H 0 0 83468.000000 80797.8431 3.20% - 35s H 0 0 81091.000000 80797.8431 0.36% - 35s 0 0 80824.5882 0 3 81091.0000 80824.5882 0.33% - 35s 0 2 80825.0322 0 3 81091.0000 80825.0322 0.33% - 36s H 30 6 81055.000000 80873.8037 0.22% 95.4 39s 32 8 81002.9630 29 1 81055.0000 80873.8037 0.22% 98.6 40s * 33 7 30 81025.000000 80873.8037 0.19% 103 40s Cutting planes: Implied bound: 71 Explored 48 nodes (21092 simplex iterations) in 41.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.102500000000e+04, best bound 8.102407692308e+04, gap 0.0011%