Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:20 2012 Optimize a model with 902 rows, 840 columns and 3640 nonzeros Presolve removed 137 rows and 40 columns Presolve time: 0.02s Presolved: 765 rows, 800 columns, 3404 nonzeros Variable types: 380 continuous, 420 integer (420 binary) Root relaxation: objective 1.517967e+02, 722 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 151.79673 0 33 - 151.79673 - - 0s 0 0 185.49534 0 39 - 185.49534 - - 0s 0 0 189.96480 0 37 - 189.96480 - - 0s 0 0 193.06596 0 43 - 193.06596 - - 0s 0 0 195.91555 0 38 - 195.91555 - - 0s 0 0 198.70528 0 51 - 198.70528 - - 0s 0 0 200.74297 0 52 - 200.74297 - - 0s 0 0 207.25757 0 42 - 207.25757 - - 0s 0 0 208.87634 0 19 - 208.87634 - - 0s 0 0 208.94984 0 22 - 208.94984 - - 0s 0 0 233.62039 0 19 - 233.62039 - - 0s 0 0 233.62039 0 15 - 233.62039 - - 0s H 0 0 314.0000000 233.62039 25.6% - 0s H 0 0 293.0000000 233.62039 20.3% - 0s 0 2 233.63447 0 15 293.00000 233.63447 20.3% - 0s H 109 73 289.0000000 235.27372 18.6% 19.4 0s H 307 130 282.0000000 239.85845 14.9% 20.7 0s H 668 255 281.0000000 246.89031 12.1% 24.8 1s * 2944 356 21 280.0000000 263.16882 6.01% 22.1 3s Cutting planes: Gomory: 6 Cover: 35 Implied bound: 27 Flow cover: 49 GUB cover: 3 Zero half: 2 Explored 4573 nodes (96870 simplex iterations) in 4.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+02, best bound 2.800000000000e+02, gap 0.0%