Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:11:31 2013 Optimize a model with 1400 rows, 100800 columns and 201900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.16s Presolved: 1300 rows, 100700 columns, 201300 nonzeros Variable types: 100700 continuous, 0 integer (0 binary) Root relaxation: objective 8.570461e+05, 6959 iterations, 0.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 857046.104 0 1 - 857046.104 - - 0s H 0 0 879012.06458 857046.104 2.50% - 1s 0 2 857046.104 0 1 879012.065 857046.104 2.50% - 2s 13 15 867578.151 7 2 879012.065 858246.035 2.36% 239 5s 51 53 876025.613 26 1 879012.065 858246.035 2.36% 156 10s * 65 57 33 872899.76732 858246.035 1.68% 144 11s * 75 59 38 871581.69847 858246.035 1.53% 137 12s * 77 47 39 867278.94874 858246.035 1.04% 134 12s * 79 25 40 863539.97130 858246.035 0.61% 132 12s * 136 16 68 862271.92178 858246.035 0.47% 83.3 14s 146 22 858693.461 7 1 862271.922 858246.035 0.47% 81.6 15s * 182 6 25 859185.93790 858246.035 0.11% 71.2 16s * 289 9 22 859145.02367 858797.976 0.04% 52.4 19s 293 8 858936.688 14 1 859145.024 858880.843 0.03% 51.7 20s * 306 15 27 859001.15552 858880.843 0.01% 49.6 20s Explored 312 nodes (22128 simplex iterations) in 20.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.590011555227e+05, best bound 8.589366879433e+05, gap 0.0075%