current bounds on the number of colors: 0 -- 113 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:00 2012 Optimize a model with 3305 rows, 6385 columns and 15904 nonzeros Presolve removed 40 rows and 2240 columns Presolve time: 0.04s Presolved: 3265 rows, 4145 columns, 13664 nonzeros Variable types: 0 continuous, 4145 integer (4145 binary) Root relaxation: objective 0.000000e+00, 117 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 (117 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 -- 56 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:00 2012 Optimize a model with 1709 rows, 3221 columns and 7952 nonzeros Presolve removed 40 rows and 1120 columns Presolve time: 0.01s Presolved: 1669 rows, 2101 columns, 6832 nonzeros Variable types: 0 continuous, 2101 integer (2101 binary) Root relaxation: objective 0.000000e+00, 117 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 (117 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:00 2012 Optimize a model with 911 rows, 1639 columns and 3976 nonzeros Presolve removed 40 rows and 560 columns Presolve time: 0.01s Presolved: 871 rows, 1079 columns, 3416 nonzeros Variable types: 0 continuous, 1079 integer (1079 binary) Root relaxation: objective 0.000000e+00, 119 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 (119 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:00 2012 Optimize a model with 512 rows, 848 columns and 1988 nonzeros Presolve removed 40 rows and 280 columns Presolve time: 0.00s Presolved: 472 rows, 568 columns, 1708 nonzeros Variable types: 0 continuous, 568 integer (568 binary) Root relaxation: objective 0.000000e+00, 119 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 (119 simplex iterations) in 0.00 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 16:16:00 2012 Optimize a model with 284 rows, 396 columns and 852 nonzeros Presolve removed 40 rows and 120 columns Presolve time: 0.00s Presolved: 244 rows, 276 columns, 732 nonzeros Variable types: 0 continuous, 276 integer (276 binary) Root relaxation: objective 0.000000e+00, 108 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 (108 simplex iterations) in 0.00 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 16:16:00 2012 Optimize a model with 170 rows, 170 columns and 284 nonzeros Presolve removed 170 rows and 170 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 16:16:00 2012 Optimize a model with 227 rows, 283 columns and 568 nonzeros Presolve removed 129 rows and 177 columns Presolve time: 0.00s Presolved: 98 rows, 106 columns, 294 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Root relaxation: objective 0.000000e+00, 42 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 (42 simplex iterations) in 0.00 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: 2