Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:09:27 2013 Optimize a model with 1507 rows, 42921 columns and 1918736 nonzeros Presolve removed 14 rows and 41 columns (presolve time = 5s) ... Presolve removed 16 rows and 51 columns Presolve time: 7.13s Presolved: 1491 rows, 42870 columns, 1916750 nonzeros Variable types: 0 continuous, 42870 integer (42870 binary) Found heuristic solution: objective 18588.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8571 1.3995512e+04 2.492615e+02 0.000000e+00 5s 10707 1.4024494e+04 0.000000e+00 0.000000e+00 8s Root relaxation: objective 1.402449e+04, 10707 iterations, 7.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14024.4935 0 105 18588.0000 14024.4935 24.6% - 15s H 0 0 15747.000000 14024.4935 10.9% - 16s H 0 0 15501.000000 14024.4935 9.53% - 17s H 0 0 15155.000000 14024.4935 7.46% - 18s 0 0 14043.8333 0 132 15155.0000 14043.8333 7.33% - 21s H 0 0 14070.000000 14043.8333 0.19% - 23s 0 0 14044.8571 0 95 14070.0000 14044.8571 0.18% - 25s H 0 0 14068.000000 14044.8571 0.16% - 34s 0 0 14044.8571 0 88 14068.0000 14044.8571 0.16% - 37s 0 0 14044.8571 0 136 14068.0000 14044.8571 0.16% - 38s 0 0 14045.3333 0 88 14068.0000 14045.3333 0.16% - 39s 0 0 14046.8095 0 148 14068.0000 14046.8095 0.15% - 39s 0 0 14048.0000 0 172 14068.0000 14048.0000 0.14% - 40s 0 0 14050.2866 0 237 14068.0000 14050.2866 0.13% - 41s H 0 0 14065.000000 14050.2866 0.10% - 41s 0 0 14051.1429 0 124 14065.0000 14051.1429 0.10% - 42s H 0 0 14063.000000 14051.1429 0.08% - 43s 0 1 14051.2500 0 124 14063.0000 14051.2500 0.08% - 49s 2 2 14051.2500 0 95 14063.0000 14051.2500 0.08% 290 59s 4 3 14051.2500 0 99 14063.0000 14051.2500 0.08% 145 62s * 4 2 9 14053.000000 14053.0000 0.0% 145 63s Cutting planes: Gomory: 5 Clique: 25 Zero half: 47 Explored 4 nodes (28734 simplex iterations) in 63.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.405300000000e+04, best bound 1.405300000000e+04, gap 0.0%