current bounds on the number of colors: 0 -- 56 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:04 2012 Optimize a model with 2324 rows, 1649 columns and 8372 nonzeros Presolve removed 1 rows and 28 columns Presolve time: 0.01s Presolved: 2323 rows, 1621 columns, 8344 nonzeros Variable types: 0 continuous, 1621 integer (1621 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 (192 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 -- 28 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:04 2012 Optimize a model with 1190 rows, 865 columns and 4186 nonzeros Presolve removed 1 rows and 14 columns Presolve time: 0.00s Presolved: 1189 rows, 851 columns, 4172 nonzeros Variable types: 0 continuous, 851 integer (851 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (195 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 Fri Dec 14 18:20:04 2012 Optimize a model with 623 rows, 473 columns and 2093 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.00s Presolved: 622 rows, 466 columns, 2086 nonzeros Variable types: 0 continuous, 466 integer (466 binary) Root relaxation: objective 0.000000e+00, 116 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 (173 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 Fri Dec 14 18:20:04 2012 Optimize a model with 299 rows, 249 columns and 897 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 298 rows, 246 columns, 894 nonzeros Variable types: 0 continuous, 246 integer (246 binary) Root relaxation: objective 0.000000e+00, 125 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 (210 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 Fri Dec 14 18:20:04 2012 Optimize a model with 137 rows, 137 columns and 299 nonzeros Presolve removed 137 rows and 137 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 Fri Dec 14 18:20:04 2012 Optimize a model with 218 rows, 193 columns and 598 nonzeros Presolve removed 56 rows and 57 columns Presolve time: 0.00s Presolved: 162 rows, 136 columns, 486 nonzeros Variable types: 0 continuous, 136 integer (136 binary) Root relaxation: objective 0.000000e+00, 63 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 55 - 0.00000 - - 0s Explored 0 nodes (202 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 - optimal solution found: number of colors: 3