current bounds on the number of colors: 0 -- 127 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:09 2012 Optimize a model with 27595 rows, 8437 columns and 90405 nonzeros Presolve time: 0.13s Presolved: 27595 rows, 8437 columns, 90405 nonzeros Variable types: 0 continuous, 8437 integer (8437 binary) Root relaxation: objective 0.000000e+00, 395 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 (645 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 -- 63 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:10 2012 Optimize a model with 13643 rows, 4373 columns and 44485 nonzeros Presolve time: 0.07s Presolved: 13643 rows, 4373 columns, 44485 nonzeros Variable types: 0 continuous, 4373 integer (4373 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 (532 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 18:33:10 2012 Optimize a model with 6667 rows, 2341 columns and 21525 nonzeros Presolve time: 0.02s Presolved: 6667 rows, 2341 columns, 21525 nonzeros Variable types: 0 continuous, 2341 integer (2341 binary) Root relaxation: objective 0.000000e+00, 285 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 (504 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:10 2012 Optimize a model with 3179 rows, 1325 columns and 10045 nonzeros Presolve time: 0.01s Presolved: 3179 rows, 1325 columns, 10045 nonzeros Variable types: 0 continuous, 1325 integer (1325 binary) Root relaxation: objective 0.000000e+00, 297 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 (535 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 18:33:10 2012 Optimize a model with 1435 rows, 817 columns and 4305 nonzeros Presolve time: 0.00s Presolved: 1435 rows, 817 columns, 4305 nonzeros Variable types: 0 continuous, 817 integer (817 binary) Root relaxation: objective 0.000000e+00, 337 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 0 244 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2462 simplex iterations) in 0.13 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:11 2012 Optimize a model with 2307 rows, 1071 columns and 7175 nonzeros Presolve time: 0.01s Presolved: 2307 rows, 1071 columns, 7175 nonzeros Variable types: 0 continuous, 1071 integer (1071 binary) Root relaxation: objective 0.000000e+00, 271 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 (673 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 18:33:11 2012 Optimize a model with 1871 rows, 944 columns and 5740 nonzeros Presolve time: 0.00s Presolved: 1871 rows, 944 columns, 5740 nonzeros Variable types: 0 continuous, 944 integer (944 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 0 137 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1869 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% optimal solution found: number of colors: 4