current bounds on the number of colors: 0 -- 231 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:30 2012 Optimize a model with 31971 rows, 26841 columns and 121785 nonzeros Presolve removed 24 rows and 2760 columns Presolve time: 0.16s Presolved: 31947 rows, 24081 columns, 119025 nonzeros Variable types: 0 continuous, 24081 integer (24081 binary) Root relaxation: objective 0.000000e+00, 403 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 (403 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 -- 115 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:30 2012 Optimize a model with 15963 rows, 13443 columns and 60363 nonzeros Presolve removed 24 rows and 1368 columns Presolve time: 0.12s Presolved: 15939 rows, 12075 columns, 58995 nonzeros Variable types: 0 continuous, 12075 integer (12075 binary) Root relaxation: objective 0.000000e+00, 402 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 (402 simplex iterations) in 0.13 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 -- 57 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:31 2012 Optimize a model with 7959 rows, 6744 columns and 29652 nonzeros Presolve removed 24 rows and 672 columns Presolve time: 0.05s Presolved: 7935 rows, 6072 columns, 28980 nonzeros Variable types: 0 continuous, 6072 integer (6072 binary) Root relaxation: objective 0.000000e+00, 390 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 (390 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 Sat Dec 15 16:40:31 2012 Optimize a model with 4095 rows, 3510 columns and 14826 nonzeros Presolve removed 24 rows and 336 columns Presolve time: 0.02s Presolved: 4071 rows, 3174 columns, 14490 nonzeros Variable types: 0 continuous, 3174 integer (3174 binary) Root relaxation: objective 0.000000e+00, 427 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 (657 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 Sat Dec 15 16:40:31 2012 Optimize a model with 2163 rows, 1893 columns and 7413 nonzeros Presolve removed 24 rows and 168 columns Presolve time: 0.01s Presolved: 2139 rows, 1725 columns, 7245 nonzeros Variable types: 0 continuous, 1725 integer (1725 binary) Root relaxation: objective 0.000000e+00, 435 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 (644 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 Sat Dec 15 16:40:31 2012 Optimize a model with 1059 rows, 969 columns and 3177 nonzeros Presolve removed 24 rows and 72 columns Presolve time: 0.00s Presolved: 1035 rows, 897 columns, 3105 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 406 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 (573 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:31 2012 Optimize a model with 507 rows, 507 columns and 1059 nonzeros Presolve removed 507 rows and 507 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:31 2012 Optimize a model with 783 rows, 738 columns and 2118 nonzeros Presolve removed 237 rows and 264 columns Presolve time: 0.00s Presolved: 546 rows, 474 columns, 1638 nonzeros Variable types: 0 continuous, 474 integer (474 binary) Root relaxation: objective 0.000000e+00, 230 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 0 195 - 0.00000 - - 0s Explored 0 nodes (724 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 - optimal solution found: number of colors: 3