current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:11 2012 Optimize a model with 34749 rows, 9825 columns and 113152 nonzeros Presolve time: 0.15s Presolved: 34749 rows, 9825 columns, 113152 nonzeros Variable types: 0 continuous, 9825 integer (9825 binary) Root relaxation: objective 0.000000e+00, 531 iterations, 0.04 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 (850 simplex iterations) in 0.24 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:12 2012 Optimize a model with 17443 rows, 5167 columns and 56576 nonzeros Presolve time: 0.09s Presolved: 17443 rows, 5167 columns, 56576 nonzeros Variable types: 0 continuous, 5167 integer (5167 binary) Root relaxation: objective 0.000000e+00, 353 iterations, 0.01 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 (606 simplex iterations) in 0.12 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:12 2012 Optimize a model with 8790 rows, 2838 columns and 28288 nonzeros Presolve time: 0.03s Presolved: 8790 rows, 2838 columns, 28288 nonzeros Variable types: 0 continuous, 2838 integer (2838 binary) Root relaxation: objective 0.000000e+00, 278 iterations, 0.01 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 (504 simplex iterations) in 0.05 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 18:38:12 2012 Optimize a model with 4209 rows, 1605 columns and 13312 nonzeros Presolve time: 0.01s Presolved: 4209 rows, 1605 columns, 13312 nonzeros Variable types: 0 continuous, 1605 integer (1605 binary) Root relaxation: objective 0.000000e+00, 302 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 (559 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:12 2012 Optimize a model with 2173 rows, 1057 columns and 6656 nonzeros Presolve time: 0.01s Presolved: 2173 rows, 1057 columns, 6656 nonzeros Variable types: 0 continuous, 1057 integer (1057 binary) Root relaxation: objective 0.000000e+00, 305 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 0 256 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3864 simplex iterations) in 0.24 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 18:38:12 2012 Optimize a model with 1155 rows, 783 columns and 3328 nonzeros Presolve removed 137 rows and 137 columns Presolve time: 0.00s Presolved: 1018 rows, 646 columns, 3054 nonzeros Variable types: 0 continuous, 646 integer (646 binary) Root relaxation: objective 0.000000e+00, 145 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 0 137 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (590 simplex iterations) in 0.01 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 18:38:13 2012 Optimize a model with 1664 rows, 920 columns and 4992 nonzeros Presolve time: 0.00s Presolved: 1664 rows, 920 columns, 4992 nonzeros Variable types: 0 continuous, 920 integer (920 binary) Root relaxation: objective 0.000000e+00, 315 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 0 262 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 1s 0 0 0.00000 0 289 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 310 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 2 0.00000 0 368 - 0.00000 - - 2s Cutting planes: Zero half: 18 Explored 3 nodes (21382 simplex iterations) in 2.07 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4