current bounds on the number of colors: 0 -- 153 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:58 2012 Optimize a model with 47577 rows, 12252 columns and 153900 nonzeros Presolve time: 0.17s Presolved: 47577 rows, 12252 columns, 153900 nonzeros Variable types: 0 continuous, 12252 integer (12252 binary) Root relaxation: objective 0.000000e+00, 529 iterations, 0.04 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 (862 simplex iterations) in 0.27 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:59 2012 Optimize a model with 23865 rows, 6438 columns and 76950 nonzeros Presolve time: 0.12s Presolved: 23865 rows, 6438 columns, 76950 nonzeros Variable types: 0 continuous, 6438 integer (6438 binary) Root relaxation: objective 0.000000e+00, 471 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 (809 simplex iterations) in 0.18 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:59 2012 Optimize a model with 12009 rows, 3531 columns and 38475 nonzeros Presolve time: 0.04s Presolved: 12009 rows, 3531 columns, 38475 nonzeros Variable types: 0 continuous, 3531 integer (3531 binary) Root relaxation: objective 0.000000e+00, 332 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 (625 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:00 2012 Optimize a model with 5769 rows, 2001 columns and 18225 nonzeros Presolve time: 0.02s Presolved: 5769 rows, 2001 columns, 18225 nonzeros Variable types: 0 continuous, 2001 integer (2001 binary) Root relaxation: objective 0.000000e+00, 335 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 (616 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:00 2012 Optimize a model with 2649 rows, 1236 columns and 8100 nonzeros Presolve time: 0.01s Presolved: 2649 rows, 1236 columns, 8100 nonzeros Variable types: 0 continuous, 1236 integer (1236 binary) Root relaxation: objective 0.000000e+00, 356 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 275 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 248 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 204 - 0.00000 - - 2s 0 0 0.00000 0 190 - 0.00000 - - 2s 0 0 0.00000 0 263 - 0.00000 - - 2s 0 0 0.00000 0 263 - 0.00000 - - 2s 0 2 0.00000 0 263 - 0.00000 - - 2s * 317 3 23 0.0000000 0.00000 0.0% 70.5 3s Cutting planes: Zero half: 9 Explored 318 nodes (54689 simplex iterations) in 3.74 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:03 2012 Optimize a model with 1401 rows, 930 columns and 4050 nonzeros Presolve removed 153 rows and 153 columns Presolve time: 0.00s Presolved: 1248 rows, 777 columns, 3744 nonzeros Variable types: 0 continuous, 777 integer (777 binary) Root relaxation: objective 0.000000e+00, 157 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 0 153 - 0.00000 - - 0s Explored 0 nodes (667 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:03 2012 Optimize a model with 2025 rows, 1083 columns and 6075 nonzeros Presolve time: 0.01s Presolved: 2025 rows, 1083 columns, 6075 nonzeros Variable types: 0 continuous, 1083 integer (1083 binary) Root relaxation: objective 0.000000e+00, 366 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 392 - 0.00000 - - 0s 0 0 0.00000 0 422 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 335 Explored 0 nodes (5895 simplex iterations) in 0.66 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4