current bounds on the number of colors: 0 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 4901 rows, 2623 columns and 16975 nonzeros Presolve removed 1 rows and 35 columns Presolve time: 0.03s Presolved: 4900 rows, 2588 columns, 16940 nonzeros Variable types: 0 continuous, 2588 integer (2588 binary) Root relaxation: objective 0.000000e+00, 158 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (158 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:50 2012 Optimize a model with 2417 rows, 1345 columns and 8245 nonzeros Presolve removed 1 rows and 17 columns Presolve time: 0.01s Presolved: 2416 rows, 1328 columns, 8228 nonzeros Variable types: 0 continuous, 1328 integer (1328 binary) Root relaxation: objective 0.000000e+00, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (246 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:50 2012 Optimize a model with 1175 rows, 706 columns and 3880 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 1174 rows, 698 columns, 3872 nonzeros Variable types: 0 continuous, 698 integer (698 binary) Root relaxation: objective 0.000000e+00, 155 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (260 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:50 2012 Optimize a model with 623 rows, 422 columns and 1940 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 622 rows, 418 columns, 1936 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Root relaxation: objective 0.000000e+00, 151 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (238 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:50 2012 Optimize a model with 347 rows, 280 columns and 970 nonzeros Presolve removed 71 rows and 72 columns Presolve time: 0.00s Presolved: 276 rows, 208 columns, 828 nonzeros Variable types: 0 continuous, 208 integer (208 binary) Root relaxation: objective 0.000000e+00, 74 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (279 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:50 2012 Optimize a model with 485 rows, 351 columns and 1455 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 484 rows, 348 columns, 1452 nonzeros Variable types: 0 continuous, 348 integer (348 binary) Root relaxation: objective 0.000000e+00, 165 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 87 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (552 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 3