Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:22:12 2013 Optimize a model with 49840 rows, 49140 columns and 196140 nonzeros Presolve removed 70 rows and 0 columns Presolve time: 0.22s Presolved: 49770 rows, 49140 columns, 196070 nonzeros Variable types: 49070 continuous, 70 integer (70 binary) Root relaxation: objective 6.342647e+04, 7131 iterations, 4.85 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63426.4721 0 59 - 63426.4721 - - 5s H 0 0 110592.00000 63426.4721 42.6% - 8s 0 0 77101.2860 0 24 110592.000 77101.2860 30.3% - 16s H 0 0 107647.41808 77101.2860 28.4% - 16s H 0 0 90447.000000 77101.2860 14.8% - 17s 0 0 80801.5178 0 2 90447.0000 80801.5178 10.7% - 19s H 0 0 82256.760474 80801.5178 1.77% - 19s H 0 0 82045.000000 80801.5178 1.52% - 19s 0 2 80802.4833 0 2 82045.0000 80802.4833 1.51% - 20s H 3 3 81594.000000 80882.3333 0.87% 123 20s H 26 6 81487.576964 80897.5156 0.72% 128 22s H 27 5 81341.000000 80897.5156 0.55% 125 23s H 41 2 81254.573333 80897.5156 0.44% 104 23s H 45 5 81215.933333 80914.8372 0.37% 109 24s * 46 6 6 81179.000000 80914.8372 0.33% 110 24s Cutting planes: Implied bound: 70 Explored 57 nodes (19958 simplex iterations) in 24.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.117900000000e+04, best bound 8.117133333333e+04, gap 0.0094%