current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:42 2012 Optimize a model with 23242 rows, 7882 columns and 76860 nonzeros Presolve time: 0.12s Presolved: 23242 rows, 7882 columns, 76860 nonzeros Variable types: 0 continuous, 7882 integer (7882 binary) Root relaxation: objective 0.000000e+00, 396 iterations, 0.02 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 (647 simplex iterations) in 0.17 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 -- 61 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:43 2012 Optimize a model with 11493 rows, 4069 columns and 37800 nonzeros Presolve time: 0.06s Presolved: 11493 rows, 4069 columns, 37800 nonzeros Variable types: 0 continuous, 4069 integer (4069 binary) Root relaxation: objective 0.000000e+00, 306 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 (519 simplex iterations) in 0.08 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:43 2012 Optimize a model with 5808 rows, 2224 columns and 18900 nonzeros Presolve time: 0.02s Presolved: 5808 rows, 2224 columns, 18900 nonzeros Variable types: 0 continuous, 2224 integer (2224 binary) Root relaxation: objective 0.000000e+00, 254 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 (454 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:43 2012 Optimize a model with 2776 rows, 1240 columns and 8820 nonzeros Presolve time: 0.01s Presolved: 2776 rows, 1240 columns, 8820 nonzeros Variable types: 0 continuous, 1240 integer (1240 binary) Root relaxation: objective 0.000000e+00, 266 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 (466 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:43 2012 Optimize a model with 1260 rows, 748 columns and 3780 nonzeros Presolve time: 0.00s Presolved: 1260 rows, 748 columns, 3780 nonzeros Variable types: 0 continuous, 748 integer (748 binary) Root relaxation: objective 0.000000e+00, 278 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 0 232 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 239 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 2 0.00000 0 272 - 0.00000 - - 1s Cutting planes: Zero half: 24 Explored 3 nodes (12452 simplex iterations) in 1.03 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:44 2012 Optimize a model with 2018 rows, 994 columns and 6300 nonzeros Presolve time: 0.01s Presolved: 2018 rows, 994 columns, 6300 nonzeros Variable types: 0 continuous, 994 integer (994 binary) Root relaxation: objective 0.000000e+00, 293 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 (770 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:44 2012 Optimize a model with 1639 rows, 871 columns and 5040 nonzeros Presolve time: 0.00s Presolved: 1639 rows, 871 columns, 5040 nonzeros Variable types: 0 continuous, 871 integer (871 binary) Root relaxation: objective 0.000000e+00, 289 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 0 218 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (968 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% optimal solution found: number of colors: 4