current bounds on the number of colors: 0 -- 159 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:20 2012 Optimize a model with 12325 rows, 12715 columns and 49059 nonzeros Presolve removed 27 rows and 2133 columns Presolve time: 0.12s Presolved: 12298 rows, 10582 columns, 46926 nonzeros Variable types: 0 continuous, 10582 integer (10582 binary) Root relaxation: objective 0.000000e+00, 241 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 (241 simplex iterations) in 0.13 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 -- 79 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:20 2012 Optimize a model with 6165 rows, 6355 columns and 24219 nonzeros Presolve removed 27 rows and 1053 columns Presolve time: 0.05s Presolved: 6138 rows, 5302 columns, 23166 nonzeros Variable types: 0 continuous, 5302 integer (5302 binary) Root relaxation: objective 0.000000e+00, 238 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 (238 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:21 2012 Optimize a model with 3085 rows, 3175 columns and 11799 nonzeros Presolve removed 27 rows and 513 columns Presolve time: 0.02s Presolved: 3058 rows, 2662 columns, 11286 nonzeros Variable types: 0 continuous, 2662 integer (2662 binary) Root relaxation: objective 0.000000e+00, 239 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 (239 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:21 2012 Optimize a model with 1545 rows, 1585 columns and 5589 nonzeros Presolve removed 27 rows and 243 columns Presolve time: 0.01s Presolved: 1518 rows, 1342 columns, 5346 nonzeros Variable types: 0 continuous, 1342 integer (1342 binary) Root relaxation: objective 0.000000e+00, 238 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 (238 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 16:21:21 2012 Optimize a model with 775 rows, 790 columns and 2484 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 748 rows, 682 columns, 2376 nonzeros Variable types: 0 continuous, 682 integer (682 binary) Root relaxation: objective 0.000000e+00, 235 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 (235 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 16:21:21 2012 Optimize a model with 467 rows, 472 columns and 1242 nonzeros Presolve removed 167 rows and 198 columns Presolve time: 0.00s Presolved: 300 rows, 274 columns, 900 nonzeros Variable types: 0 continuous, 274 integer (274 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 0.00000 0 121 - 0.00000 - - 0s Explored 0 nodes (449 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 16:21:21 2012 Optimize a model with 621 rows, 631 columns and 1863 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 594 rows, 550 columns, 1782 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Root relaxation: objective 0.000000e+00, 227 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 (227 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