Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:24:58 2012 Optimize a model with 19080 rows, 5256 columns and 62208 nonzeros Presolve time: 0.14s Presolved: 19080 rows, 5256 columns, 62317 nonzeros Variable types: 0 continuous, 5256 integer (5256 binary) Found heuristic solution: objective 50.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 16858 1.9527137e+00 8.967945e+02 0.000000e+00 5s 20389 2.0000000e+00 0.000000e+00 0.000000e+00 7s Root relaxation: objective 2.000000e+00, 20389 iterations, 7.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 50.00000 2.00000 96.0% - 7s H 0 0 19.0000000 2.00000 89.5% - 7s H 0 0 5.0000000 2.00000 60.0% - 7s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 7s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 10s 0 2 2.00000 0 144 5.00000 2.00000 60.0% - 12s 1 3 2.66667 1 290 5.00000 2.00000 60.0% 42853 31s 2 4 2.50000 1 143 5.00000 2.50000 50.0% 36922 45s 19 19 cutoff 17 5.00000 2.50000 50.0% 4936 50s 24 20 4.00000 17 96 5.00000 2.50000 50.0% 4920 55s 52 24 3.00000 3 136 5.00000 2.66667 46.7% 2733 60s H 55 13 4.0000000 2.66667 33.3% 2589 61s Cutting planes: Clique: 10 Explored 137 nodes (179283 simplex iterations) in 63.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%