current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:47 2012 Optimize a model with 3355 rows, 6109 columns and 15785 nonzeros Presolve removed 33 rows and 1815 columns Presolve time: 0.04s Presolved: 3322 rows, 4294 columns, 13970 nonzeros Variable types: 0 continuous, 4294 integer (4294 binary) Root relaxation: objective 0.000000e+00, 127 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 (127 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 -- 55 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:47 2012 Optimize a model with 1703 rows, 3029 columns and 7749 nonzeros Presolve removed 33 rows and 891 columns Presolve time: 0.01s Presolved: 1670 rows, 2138 columns, 6858 nonzeros Variable types: 0 continuous, 2138 integer (2138 binary) Root relaxation: objective 0.000000e+00, 127 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 (127 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 -- 27 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:47 2012 Optimize a model with 877 rows, 1489 columns and 3731 nonzeros Presolve removed 33 rows and 429 columns Presolve time: 0.00s Presolved: 844 rows, 1060 columns, 3302 nonzeros Variable types: 0 continuous, 1060 integer (1060 binary) Root relaxation: objective 0.000000e+00, 131 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 (131 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:47 2012 Optimize a model with 464 rows, 719 columns and 1722 nonzeros Presolve removed 33 rows and 198 columns Presolve time: 0.00s Presolved: 431 rows, 521 columns, 1524 nonzeros Variable types: 0 continuous, 521 integer (521 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 0.00 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:47 2012 Optimize a model with 287 rows, 389 columns and 861 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 254 rows, 290 columns, 762 nonzeros Variable types: 0 continuous, 290 integer (290 binary) Root relaxation: objective 0.000000e+00, 100 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 (100 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 16:15:47 2012 Optimize a model with 169 rows, 169 columns and 287 nonzeros Presolve removed 169 rows and 169 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 16:15:47 2012 Optimize a model with 228 rows, 279 columns and 574 nonzeros Presolve removed 124 rows and 164 columns Presolve time: 0.00s Presolved: 104 rows, 115 columns, 312 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Root relaxation: objective 0.000000e+00, 44 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 (44 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