Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:08 2012 Optimize a model with 659 rows, 115 columns and 1318 nonzeros Presolve removed 257 rows and 0 columns Presolve time: 0.00s Presolved: 402 rows, 115 columns, 1028 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.904065e+01, 263 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.04065 0 113 29.00000 39.04065 34.6% - 0s 0 0 38.75409 0 113 29.00000 38.75409 33.6% - 0s 0 0 38.64349 0 112 29.00000 38.64349 33.3% - 0s H 0 0 30.0000000 38.64349 28.8% - 0s 0 0 38.51587 0 111 30.00000 38.51587 28.4% - 0s 0 0 38.26431 0 114 30.00000 38.26431 27.5% - 0s 0 0 37.90892 0 114 30.00000 37.90892 26.4% - 0s 0 0 37.83653 0 114 30.00000 37.83653 26.1% - 0s 0 0 37.80880 0 113 30.00000 37.80880 26.0% - 0s 0 0 37.80569 0 114 30.00000 37.80569 26.0% - 0s 0 0 37.69671 0 114 30.00000 37.69671 25.7% - 0s 0 0 37.57680 0 114 30.00000 37.57680 25.3% - 0s 0 0 37.50521 0 113 30.00000 37.50521 25.0% - 0s 0 0 37.48114 0 115 30.00000 37.48114 24.9% - 0s 0 0 37.47644 0 115 30.00000 37.47644 24.9% - 0s 0 0 37.47644 0 115 30.00000 37.47644 24.9% - 0s 0 2 37.47566 0 115 30.00000 37.47566 24.9% - 0s H 51 22 31.0000000 36.96766 19.3% 33.1 0s * 483 85 13 32.0000000 35.02564 9.46% 27.6 0s Cutting planes: Clique: 6 Zero half: 42 Explored 847 nodes (22879 simplex iterations) in 0.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%