current bounds on the number of colors: 0 -- 125 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:29 2012 Optimize a model with 26785 rows, 8180 columns and 87730 nonzeros Presolve time: 0.13s Presolved: 26785 rows, 8180 columns, 87730 nonzeros Variable types: 0 continuous, 8180 integer (8180 binary) Root relaxation: objective 0.000000e+00, 426 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 (701 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 18:32:29 2012 Optimize a model with 13455 rows, 4305 columns and 43865 nonzeros Presolve time: 0.07s Presolved: 13455 rows, 4305 columns, 43865 nonzeros Variable types: 0 continuous, 4305 integer (4305 binary) Root relaxation: objective 0.000000e+00, 302 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 (516 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 18:32:30 2012 Optimize a model with 6575 rows, 2305 columns and 21225 nonzeros Presolve time: 0.02s Presolved: 6575 rows, 2305 columns, 21225 nonzeros Variable types: 0 continuous, 2305 integer (2305 binary) Root relaxation: objective 0.000000e+00, 267 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 (491 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 18:32:30 2012 Optimize a model with 3135 rows, 1305 columns and 9905 nonzeros Presolve time: 0.01s Presolved: 3135 rows, 1305 columns, 9905 nonzeros Variable types: 0 continuous, 1305 integer (1305 binary) Root relaxation: objective 0.000000e+00, 290 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 (630 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 18:32:30 2012 Optimize a model with 1415 rows, 805 columns and 4245 nonzeros Presolve time: 0.00s Presolved: 1415 rows, 805 columns, 4245 nonzeros Variable types: 0 continuous, 805 integer (805 binary) Root relaxation: objective 0.000000e+00, 280 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 0 246 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 310 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 1s 0 2 0.00000 0 321 - 0.00000 - - 1s Cutting planes: Zero half: 15 Explored 3 nodes (16236 simplex iterations) in 1.57 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 18:32:31 2012 Optimize a model with 2275 rows, 1055 columns and 7075 nonzeros Presolve time: 0.01s Presolved: 2275 rows, 1055 columns, 7075 nonzeros Variable types: 0 continuous, 1055 integer (1055 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (764 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 18:32:32 2012 Optimize a model with 1845 rows, 930 columns and 5660 nonzeros Presolve time: 0.00s Presolved: 1845 rows, 930 columns, 5660 nonzeros Variable types: 0 continuous, 930 integer (930 binary) Root relaxation: objective 0.000000e+00, 280 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 0 230 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 38 Zero half: 156 Explored 0 nodes (2551 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% optimal solution found: number of colors: 4