current bounds on the number of colors: 0 -- 124 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:49 2012 Optimize a model with 26164 rows, 8108 columns and 85808 nonzeros Presolve removed 1 rows and 62 columns Presolve time: 0.13s Presolved: 26163 rows, 8046 columns, 85746 nonzeros Variable types: 0 continuous, 8046 integer (8046 binary) Root relaxation: objective 0.000000e+00, 412 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 (648 simplex iterations) in 0.19 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 -- 62 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:50 2012 Optimize a model with 13144 rows, 4264 columns and 42904 nonzeros Presolve removed 1 rows and 31 columns Presolve time: 0.06s Presolved: 13143 rows, 4233 columns, 42873 nonzeros Variable types: 0 continuous, 4233 integer (4233 binary) Root relaxation: objective 0.000000e+00, 312 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 (533 simplex iterations) in 0.09 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 -- 31 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:50 2012 Optimize a model with 6424 rows, 2280 columns and 20760 nonzeros Presolve removed 1 rows and 15 columns Presolve time: 0.02s Presolved: 6423 rows, 2265 columns, 20745 nonzeros Variable types: 0 continuous, 2265 integer (2265 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 (485 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:50 2012 Optimize a model with 3064 rows, 1288 columns and 9688 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.01s Presolved: 3063 rows, 1281 columns, 9681 nonzeros Variable types: 0 continuous, 1281 integer (1281 binary) Root relaxation: objective 0.000000e+00, 272 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 (504 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 18:31:50 2012 Optimize a model with 1384 rows, 792 columns and 4152 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1383 rows, 789 columns, 4149 nonzeros Variable types: 0 continuous, 789 integer (789 binary) Root relaxation: objective 0.000000e+00, 273 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2550 simplex iterations) in 0.15 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:51 2012 Optimize a model with 2224 rows, 1040 columns and 6920 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.01s Presolved: 2223 rows, 1035 columns, 6915 nonzeros Variable types: 0 continuous, 1035 integer (1035 binary) Root relaxation: objective 0.000000e+00, 308 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 (626 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 18:31:51 2012 Optimize a model with 1804 rows, 916 columns and 5536 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1803 rows, 912 columns, 5532 nonzeros Variable types: 0 continuous, 912 integer (912 binary) Root relaxation: objective 0.000000e+00, 277 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 88 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1237 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% optimal solution found: number of colors: 4