current bounds on the number of colors: 0 -- 127 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:10 2012 Optimize a model with 5167 rows, 8081 columns and 23121 nonzeros Presolve removed 35 rows and 2205 columns Presolve time: 0.07s Presolved: 5132 rows, 5876 columns, 20916 nonzeros Variable types: 0 continuous, 5876 integer (5876 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 0.07 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 -- 63 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:10 2012 Optimize a model with 2607 rows, 4017 columns and 11377 nonzeros Presolve removed 35 rows and 1085 columns Presolve time: 0.02s Presolved: 2572 rows, 2932 columns, 10292 nonzeros Variable types: 0 continuous, 2932 integer (2932 binary) Root relaxation: objective 0.000000e+00, 153 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 (153 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 -- 31 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:10 2012 Optimize a model with 1327 rows, 1985 columns and 5505 nonzeros Presolve removed 35 rows and 525 columns Presolve time: 0.01s Presolved: 1292 rows, 1460 columns, 4980 nonzeros Variable types: 0 continuous, 1460 integer (1460 binary) Root relaxation: objective 0.000000e+00, 153 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 (153 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:10 2012 Optimize a model with 687 rows, 969 columns and 2569 nonzeros Presolve removed 35 rows and 245 columns Presolve time: 0.00s Presolved: 652 rows, 724 columns, 2324 nonzeros Variable types: 0 continuous, 724 integer (724 binary) Root relaxation: objective 0.000000e+00, 147 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 (147 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 16:17:10 2012 Optimize a model with 367 rows, 461 columns and 1101 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 332 rows, 356 columns, 996 nonzeros Variable types: 0 continuous, 356 integer (356 binary) Root relaxation: objective 0.000000e+00, 139 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 (139 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 16:17:10 2012 Optimize a model with 207 rows, 207 columns and 367 nonzeros Presolve removed 207 rows and 207 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 16:17:10 2012 Optimize a model with 287 rows, 334 columns and 734 nonzeros Presolve removed 141 rows and 183 columns Presolve time: 0.00s Presolved: 146 rows, 151 columns, 438 nonzeros Variable types: 0 continuous, 151 integer (151 binary) Root relaxation: objective 0.000000e+00, 68 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 (68 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