current bounds on the number of colors: 0 -- 146 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:20 2012 Optimize a model with 8687 rows, 10775 columns and 36281 nonzeros Presolve removed 31 rows and 2263 columns Presolve time: 0.10s Presolved: 8656 rows, 8512 columns, 34018 nonzeros Variable types: 0 continuous, 8512 integer (8512 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 simplex iterations) in 0.11 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 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 4358 rows, 5373 columns and 17892 nonzeros Presolve removed 31 rows and 1116 columns Presolve time: 0.03s Presolved: 4327 rows, 4257 columns, 16776 nonzeros Variable types: 0 continuous, 4257 integer (4257 binary) Root relaxation: objective 0.000000e+00, 202 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 (202 simplex iterations) in 0.04 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 2252 rows, 2745 columns and 8946 nonzeros Presolve removed 31 rows and 558 columns Presolve time: 0.01s Presolved: 2221 rows, 2187 columns, 8388 nonzeros Variable types: 0 continuous, 2187 integer (2187 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 1199 rows, 1431 columns and 4473 nonzeros Presolve removed 31 rows and 279 columns Presolve time: 0.00s Presolved: 1168 rows, 1152 columns, 4194 nonzeros Variable types: 0 continuous, 1152 integer (1152 binary) Root relaxation: objective 0.000000e+00, 210 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 (299 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 614 rows, 701 columns and 1988 nonzeros Presolve removed 31 rows and 124 columns Presolve time: 0.00s Presolved: 583 rows, 577 columns, 1864 nonzeros Variable types: 0 continuous, 577 integer (577 binary) Root relaxation: objective 0.000000e+00, 184 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 (184 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 380 rows, 409 columns and 994 nonzeros Presolve removed 148 rows and 180 columns Presolve time: 0.00s Presolved: 232 rows, 229 columns, 696 nonzeros Variable types: 0 continuous, 229 integer (229 binary) Root relaxation: objective 0.000000e+00, 115 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 85 - 0.00000 - - 0s Explored 0 nodes (358 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:21 2012 Optimize a model with 497 rows, 555 columns and 1491 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 466 rows, 462 columns, 1398 nonzeros Variable types: 0 continuous, 462 integer (462 binary) Root relaxation: objective 0.000000e+00, 190 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 (190 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: 3