current bounds on the number of colors: 0 -- 112 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:44 2012 Optimize a model with 17360 rows, 6580 columns and 58016 nonzeros Presolve removed 1 rows and 56 columns Presolve time: 0.12s Presolved: 17359 rows, 6524 columns, 57960 nonzeros Variable types: 0 continuous, 6524 integer (6524 binary) Root relaxation: objective 0.000000e+00, 313 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 (513 simplex iterations) in 0.16 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 -- 56 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:44 2012 Optimize a model with 8736 rows, 3444 columns and 29008 nonzeros Presolve removed 1 rows and 28 columns Presolve time: 0.04s Presolved: 8735 rows, 3416 columns, 28980 nonzeros Variable types: 0 continuous, 3416 integer (3416 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 (471 simplex iterations) in 0.06 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 18:27:44 2012 Optimize a model with 4424 rows, 1876 columns and 14504 nonzeros Presolve removed 1 rows and 14 columns Presolve time: 0.02s Presolved: 4423 rows, 1862 columns, 14490 nonzeros Variable types: 0 continuous, 1862 integer (1862 binary) Root relaxation: objective 0.000000e+00, 228 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 (478 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 18:27:44 2012 Optimize a model with 2268 rows, 1092 columns and 7252 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.01s Presolved: 2267 rows, 1085 columns, 7245 nonzeros Variable types: 0 continuous, 1085 integer (1085 binary) Root relaxation: objective 0.000000e+00, 256 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 (439 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 18:27:45 2012 Optimize a model with 1036 rows, 644 columns and 3108 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1035 rows, 641 columns, 3105 nonzeros Variable types: 0 continuous, 641 integer (641 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 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 241 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 2 0.00000 0 244 - 0.00000 - - 0s Cutting planes: Zero half: 14 Explored 7 nodes (8509 simplex iterations) in 0.56 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 18:27:45 2012 Optimize a model with 1652 rows, 868 columns and 5180 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1651 rows, 863 columns, 5175 nonzeros Variable types: 0 continuous, 863 integer (863 binary) Root relaxation: objective 0.000000e+00, 240 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 (440 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 18:27:45 2012 Optimize a model with 1344 rows, 756 columns and 4144 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1343 rows, 752 columns, 4140 nonzeros Variable types: 0 continuous, 752 integer (752 binary) Root relaxation: objective 0.000000e+00, 264 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 (524 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% optimal solution found: number of colors: 4