Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:00:01 2013 Optimize a model with 44352 rows, 43692 columns and 174372 nonzeros Presolve removed 66 rows and 0 columns Presolve time: 0.19s Presolved: 44286 rows, 43692 columns, 174306 nonzeros Variable types: 43626 continuous, 66 integer (66 binary) Root relaxation: objective 5.785886e+04, 5229 iterations, 2.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57858.8557 0 52 - 57858.8557 - - 3s H 0 0 92166.000000 57858.8557 37.2% - 4s 0 0 77214.8311 0 16 92166.0000 77214.8311 16.2% - 10s H 0 0 88789.000000 77214.8311 13.0% - 10s 0 0 80961.4610 0 6 88789.0000 80961.4610 8.82% - 12s H 0 0 88111.957420 80961.4610 8.12% - 12s H 0 0 86781.000000 80961.4610 6.71% - 12s 0 0 81175.1023 0 6 86781.0000 81175.1023 6.46% - 12s H 0 0 86221.853098 81175.1023 5.85% - 12s H 0 0 85351.000000 81175.1023 4.89% - 12s H 0 0 82979.585014 81175.1023 2.17% - 13s H 0 0 82797.545372 81175.1023 1.96% - 13s 0 2 81178.7907 0 6 82797.5454 81178.7907 1.96% - 14s H 3 3 82260.777709 81275.9606 1.20% 144 14s H 4 4 81513.937500 81275.9606 0.29% 121 14s 5 6 81377.4801 5 2 81513.9375 81275.9606 0.29% 137 15s H 6 5 81489.224878 81275.9606 0.26% 114 15s H 9 8 81439.021505 81275.9606 0.20% 99.1 15s H 10 8 81423.145455 81275.9606 0.18% 96.1 15s * 11 7 10 81385.000000 81275.9606 0.13% 88.2 15s Cutting planes: Implied bound: 64 MIR: 1 Explored 27 nodes (14669 simplex iterations) in 15.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.138500000000e+04, best bound 8.137794285714e+04, gap 0.0087%