current bounds on the number of colors: 0 -- 105 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:38 2012 Optimize a model with 15029 rows, 5747 columns and 50232 nonzeros Presolve removed 2 rows and 104 columns Presolve time: 0.10s Presolved: 15027 rows, 5643 columns, 50128 nonzeros Variable types: 0 continuous, 5643 integer (5643 binary) Root relaxation: objective 0.000000e+00, 323 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 (498 simplex iterations) in 0.14 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 -- 52 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:39 2012 Optimize a model with 7567 rows, 3017 columns and 25116 nonzeros Presolve removed 2 rows and 52 columns Presolve time: 0.03s Presolved: 7565 rows, 2965 columns, 25064 nonzeros Variable types: 0 continuous, 2965 integer (2965 binary) Root relaxation: objective 0.000000e+00, 233 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 (395 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 -- 26 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:39 2012 Optimize a model with 3836 rows, 1652 columns and 12558 nonzeros Presolve removed 2 rows and 26 columns Presolve time: 0.01s Presolved: 3834 rows, 1626 columns, 12532 nonzeros Variable types: 0 continuous, 1626 integer (1626 binary) Root relaxation: objective 0.000000e+00, 229 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 (373 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:39 2012 Optimize a model with 1827 rows, 917 columns and 5796 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.01s Presolved: 1825 rows, 905 columns, 5784 nonzeros Variable types: 0 continuous, 905 integer (905 binary) Root relaxation: objective 0.000000e+00, 236 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 (422 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:39 2012 Optimize a model with 966 rows, 602 columns and 2898 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 964 rows, 596 columns, 2892 nonzeros Variable types: 0 continuous, 596 integer (596 binary) Root relaxation: objective 0.000000e+00, 255 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 0 196 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 237 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 2 0.00000 0 223 - 0.00000 - - 0s Cutting planes: Zero half: 23 Explored 3 nodes (7477 simplex iterations) in 0.47 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:39 2012 Optimize a model with 1253 rows, 707 columns and 3864 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 1251 rows, 699 columns, 3856 nonzeros Variable types: 0 continuous, 699 integer (699 binary) Root relaxation: objective 0.000000e+00, 247 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 (731 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% optimal solution found: number of colors: 4