current bounds on the number of colors: 0 -- 114 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:23 2012 Optimize a model with 18411 rows, 6819 columns and 61389 nonzeros Presolve removed 1 rows and 57 columns Presolve time: 0.12s Presolved: 18410 rows, 6762 columns, 61332 nonzeros Variable types: 0 continuous, 6762 integer (6762 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 (278 simplex iterations) in 0.14 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 -- 57 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:23 2012 Optimize a model with 9102 rows, 3513 columns and 30156 nonzeros Presolve removed 1 rows and 28 columns Presolve time: 0.04s Presolved: 9101 rows, 3485 columns, 30128 nonzeros Variable types: 0 continuous, 3485 integer (3485 binary) Root relaxation: objective 0.000000e+00, 291 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 (291 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 -- 28 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:24 2012 Optimize a model with 4608 rows, 1917 columns and 15078 nonzeros Presolve removed 1 rows and 14 columns Presolve time: 0.02s Presolved: 4607 rows, 1903 columns, 15064 nonzeros Variable types: 0 continuous, 1903 integer (1903 binary) Root relaxation: objective 0.000000e+00, 238 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 (424 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:24 2012 Optimize a model with 2361 rows, 1119 columns and 7539 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.01s Presolved: 2360 rows, 1112 columns, 7532 nonzeros Variable types: 0 continuous, 1112 integer (1112 binary) Root relaxation: objective 0.000000e+00, 238 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 (414 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:24 2012 Optimize a model with 1077 rows, 663 columns and 3231 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1076 rows, 660 columns, 3228 nonzeros Variable types: 0 continuous, 660 integer (660 binary) Root relaxation: objective 0.000000e+00, 286 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 0 212 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 2 0.00000 0 209 - 0.00000 - - 0s Cutting planes: Zero half: 32 Explored 49 nodes (12118 simplex iterations) in 0.61 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 18:28:24 2012 Optimize a model with 1719 rows, 891 columns and 5385 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1718 rows, 886 columns, 5380 nonzeros Variable types: 0 continuous, 886 integer (886 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 (482 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:24 2012 Optimize a model with 1398 rows, 777 columns and 4308 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1397 rows, 773 columns, 4304 nonzeros Variable types: 0 continuous, 773 integer (773 binary) Root relaxation: objective 0.000000e+00, 261 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 (723 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