current bounds on the number of colors: 0 -- 99 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:17 2012 Optimize a model with 13623 rows, 5127 columns and 45423 nonzeros Presolve time: 0.09s Presolved: 13623 rows, 5127 columns, 45423 nonzeros Variable types: 0 continuous, 5127 integer (5127 binary) Root relaxation: objective 0.000000e+00, 314 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 (490 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 -- 49 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:18 2012 Optimize a model with 6723 rows, 2652 columns and 22248 nonzeros Presolve time: 0.03s Presolved: 6723 rows, 2652 columns, 22248 nonzeros Variable types: 0 continuous, 2652 integer (2652 binary) Root relaxation: objective 0.000000e+00, 239 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 (401 simplex iterations) in 0.04 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 -- 24 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:18 2012 Optimize a model with 3411 rows, 1464 columns and 11124 nonzeros Presolve time: 0.01s Presolved: 3411 rows, 1464 columns, 11124 nonzeros Variable types: 0 continuous, 1464 integer (1464 binary) Root relaxation: objective 0.000000e+00, 204 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 (351 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 18:24:18 2012 Optimize a model with 1755 rows, 870 columns and 5562 nonzeros Presolve time: 0.00s Presolved: 1755 rows, 870 columns, 5562 nonzeros Variable types: 0 continuous, 870 integer (870 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (527 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 18:24:18 2012 Optimize a model with 927 rows, 573 columns and 2781 nonzeros Presolve time: 0.00s Presolved: 927 rows, 573 columns, 2781 nonzeros Variable types: 0 continuous, 573 integer (573 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 0 176 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 229 - 0.00000 - - 0s 0 0 0.00000 0 213 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 2 0.00000 0 226 - 0.00000 - - 0s Cutting planes: Zero half: 14 Explored 7 nodes (7985 simplex iterations) in 0.51 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 18:24:18 2012 Optimize a model with 1203 rows, 672 columns and 3708 nonzeros Presolve time: 0.00s Presolved: 1203 rows, 672 columns, 3708 nonzeros Variable types: 0 continuous, 672 integer (672 binary) Root relaxation: objective 0.000000e+00, 230 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 (870 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