current bounds on the number of colors: 0 -- 119 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:27 2012 Optimize a model with 4603 rows, 7097 columns and 20473 nonzeros Presolve removed 31 rows and 1829 columns Presolve time: 0.06s Presolved: 4572 rows, 5268 columns, 18644 nonzeros Variable types: 0 continuous, 5268 integer (5268 binary) Root relaxation: objective 0.000000e+00, 149 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 (149 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 -- 59 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:27 2012 Optimize a model with 2323 rows, 3527 columns and 10063 nonzeros Presolve removed 31 rows and 899 columns Presolve time: 0.02s Presolved: 2292 rows, 2628 columns, 9164 nonzeros Variable types: 0 continuous, 2628 integer (2628 binary) Root relaxation: objective 0.000000e+00, 149 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 (149 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 -- 29 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:27 2012 Optimize a model with 1183 rows, 1742 columns and 4858 nonzeros Presolve removed 31 rows and 434 columns Presolve time: 0.01s Presolved: 1152 rows, 1308 columns, 4424 nonzeros Variable types: 0 continuous, 1308 integer (1308 binary) Root relaxation: objective 0.000000e+00, 155 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 (155 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 16:16:27 2012 Optimize a model with 651 rows, 909 columns and 2429 nonzeros Presolve removed 31 rows and 217 columns Presolve time: 0.00s Presolved: 620 rows, 692 columns, 2212 nonzeros Variable types: 0 continuous, 692 integer (692 binary) Root relaxation: objective 0.000000e+00, 146 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 (146 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 16:16:27 2012 Optimize a model with 347 rows, 433 columns and 1041 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 316 rows, 340 columns, 948 nonzeros Variable types: 0 continuous, 340 integer (340 binary) Root relaxation: objective 0.000000e+00, 121 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 (121 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 16:16:27 2012 Optimize a model with 195 rows, 195 columns and 347 nonzeros Presolve removed 195 rows and 195 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 16:16:27 2012 Optimize a model with 271 rows, 314 columns and 694 nonzeros Presolve removed 131 rows and 168 columns Presolve time: 0.00s Presolved: 140 rows, 146 columns, 420 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Root relaxation: objective 0.000000e+00, 62 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 (62 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