current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:06 2012 Optimize a model with 1893 rows, 1074 columns and 6534 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.01s Presolved: 1892 rows, 1052 columns, 6512 nonzeros Variable types: 0 continuous, 1052 integer (1052 binary) Root relaxation: objective 0.000000e+00, 92 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 (92 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 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:07 2012 Optimize a model with 969 rows, 579 columns and 3267 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.00s Presolved: 968 rows, 568 columns, 3256 nonzeros Variable types: 0 continuous, 568 integer (568 binary) Root relaxation: objective 0.000000e+00, 99 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 (164 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:07 2012 Optimize a model with 465 rows, 309 columns and 1485 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 464 rows, 304 columns, 1480 nonzeros Variable types: 0 continuous, 304 integer (304 binary) Root relaxation: objective 0.000000e+00, 101 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 (157 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:07 2012 Optimize a model with 213 rows, 174 columns and 594 nonzeros Presolve removed 45 rows and 46 columns Presolve time: 0.00s Presolved: 168 rows, 128 columns, 504 nonzeros Variable types: 0 continuous, 128 integer (128 binary) Root relaxation: objective 0.000000e+00, 46 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 44 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (184 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:07 2012 Optimize a model with 297 rows, 219 columns and 891 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 296 rows, 216 columns, 888 nonzeros Variable types: 0 continuous, 216 integer (216 binary) Root relaxation: objective 0.000000e+00, 103 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 (188 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