current bounds on the number of colors: 0 -- 102 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:03 2012 Optimize a model with 14586 rows, 5486 columns and 48654 nonzeros Presolve removed 1 rows and 51 columns Presolve time: 0.10s Presolved: 14585 rows, 5435 columns, 48603 nonzeros Variable types: 0 continuous, 5435 integer (5435 binary) Root relaxation: objective 0.000000e+00, 271 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 (271 simplex iterations) in 0.11 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 -- 51 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:04 2012 Optimize a model with 7202 rows, 2834 columns and 23850 nonzeros Presolve removed 1 rows and 25 columns Presolve time: 0.03s Presolved: 7201 rows, 2809 columns, 23825 nonzeros Variable types: 0 continuous, 2809 integer (2809 binary) Root relaxation: objective 0.000000e+00, 265 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 (447 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:04 2012 Optimize a model with 3510 rows, 1508 columns and 11448 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 3509 rows, 1496 columns, 11436 nonzeros Variable types: 0 continuous, 1496 integer (1496 binary) Root relaxation: objective 0.000000e+00, 205 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 (371 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:04 2012 Optimize a model with 1806 rows, 896 columns and 5724 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1805 rows, 890 columns, 5718 nonzeros Variable types: 0 continuous, 890 integer (890 binary) Root relaxation: objective 0.000000e+00, 226 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 (529 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:04 2012 Optimize a model with 954 rows, 590 columns and 2862 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 953 rows, 587 columns, 2859 nonzeros Variable types: 0 continuous, 587 integer (587 binary) Root relaxation: objective 0.000000e+00, 237 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 2 0.00000 0 213 - 0.00000 - - 0s Cutting planes: Zero half: 27 Explored 7 nodes (11998 simplex iterations) in 0.73 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:05 2012 Optimize a model with 1238 rows, 692 columns and 3816 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1237 rows, 688 columns, 3812 nonzeros Variable types: 0 continuous, 688 integer (688 binary) Root relaxation: objective 0.000000e+00, 234 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 (868 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% optimal solution found: number of colors: 4