current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:38 2012 Optimize a model with 26000 rows, 8848 columns and 86060 nonzeros Presolve time: 0.13s Presolved: 26000 rows, 8848 columns, 86060 nonzeros Variable types: 0 continuous, 8848 integer (8848 binary) Root relaxation: objective 0.000000e+00, 431 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 (669 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:38 2012 Optimize a model with 12866 rows, 4558 columns and 42368 nonzeros Presolve time: 0.06s Presolved: 12866 rows, 4558 columns, 42368 nonzeros Variable types: 0 continuous, 4558 integer (4558 binary) Root relaxation: objective 0.000000e+00, 330 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 (547 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:38 2012 Optimize a model with 6498 rows, 2478 columns and 21184 nonzeros Presolve time: 0.02s Presolved: 6498 rows, 2478 columns, 21184 nonzeros Variable types: 0 continuous, 2478 integer (2478 binary) Root relaxation: objective 0.000000e+00, 269 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 (477 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:38 2012 Optimize a model with 3314 rows, 1438 columns and 10592 nonzeros Presolve time: 0.01s Presolved: 3314 rows, 1438 columns, 10592 nonzeros Variable types: 0 continuous, 1438 integer (1438 binary) Root relaxation: objective 0.000000e+00, 279 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 (489 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:39 2012 Optimize a model with 1722 rows, 918 columns and 5296 nonzeros Presolve time: 0.00s Presolved: 1722 rows, 918 columns, 5296 nonzeros Variable types: 0 continuous, 918 integer (918 binary) Root relaxation: objective 0.000000e+00, 311 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 (1785 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:39 2012 Optimize a model with 926 rows, 658 columns and 2648 nonzeros Presolve removed 130 rows and 130 columns Presolve time: 0.00s Presolved: 796 rows, 528 columns, 2388 nonzeros Variable types: 0 continuous, 528 integer (528 binary) Root relaxation: objective 0.000000e+00, 135 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 0 130 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (534 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 18:34:39 2012 Optimize a model with 1324 rows, 788 columns and 3972 nonzeros Presolve time: 0.00s Presolved: 1324 rows, 788 columns, 3972 nonzeros Variable types: 0 continuous, 788 integer (788 binary) Root relaxation: objective 0.000000e+00, 291 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 0 250 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 2 0.00000 0 273 - 0.00000 - - 1s Cutting planes: Zero half: 13 Explored 5 nodes (13515 simplex iterations) in 1.04 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4