Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:11:57 2013 Optimize a model with 575 rows, 225 columns and 1800 nonzeros Presolve removed 122 rows and 110 columns Presolve time: 0.00s Presolved: 453 rows, 115 columns, 1491 nonzeros Variable types: 11 continuous, 104 integer (104 binary) Found heuristic solution: objective 2505.0000000 Root relaxation: objective 1.874182e+03, 53 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1874.18182 0 3 2505.00000 1874.18182 25.2% - 0s 0 0 1874.26500 0 16 2505.00000 1874.26500 25.2% - 0s H 0 0 1912.0000000 1874.26500 1.97% - 0s H 0 0 1906.0000000 1874.26500 1.67% - 0s H 0 0 1892.0000000 1874.26500 0.94% - 0s 0 0 1874.46580 0 17 1892.00000 1874.46580 0.93% - 0s 0 0 1874.46580 0 6 1892.00000 1874.46580 0.93% - 0s 0 0 1874.46580 0 18 1892.00000 1874.46580 0.93% - 0s H 0 0 1886.0000000 1874.46580 0.61% - 0s 0 0 1874.81659 0 20 1886.00000 1874.81659 0.59% - 0s 0 0 1875.26985 0 21 1886.00000 1875.26985 0.57% - 0s 0 0 1875.53518 0 22 1886.00000 1875.53518 0.55% - 0s 0 0 1875.97221 0 22 1886.00000 1875.97221 0.53% - 0s H 0 0 1885.0000000 1875.97221 0.48% - 0s 0 0 1876.06155 0 24 1885.00000 1876.06155 0.47% - 0s 0 0 1876.24332 0 25 1885.00000 1876.24332 0.46% - 0s 0 0 1876.31034 0 28 1885.00000 1876.31034 0.46% - 0s 0 0 1876.31034 0 28 1885.00000 1876.31034 0.46% - 0s 0 0 1876.31034 0 25 1885.00000 1876.31034 0.46% - 0s H 0 0 1883.0000000 1876.31034 0.36% - 0s 0 2 1876.35083 0 25 1883.00000 1876.35083 0.35% - 0s * 82 26 7 1881.0000000 1877.42289 0.19% 5.7 0s * 105 8 9 1879.0000000 1877.71342 0.07% 5.3 0s Cutting planes: Cover: 1 MIR: 27 Zero half: 2 Explored 117 nodes (891 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.879000000000e+03, best bound 1.879000000000e+03, gap 0.0%