current bounds on the number of colors: 0 -- 126 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:05 2012 Optimize a model with 4536 rows, 8008 columns and 21168 nonzeros Presolve removed 44 rows and 2772 columns Presolve time: 0.06s Presolved: 4492 rows, 5236 columns, 18396 nonzeros Variable types: 0 continuous, 5236 integer (5236 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 0.06 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 16:17:05 2012 Optimize a model with 2296 rows, 3976 columns and 10416 nonzeros Presolve removed 44 rows and 1364 columns Presolve time: 0.02s Presolved: 2252 rows, 2612 columns, 9052 nonzeros Variable types: 0 continuous, 2612 integer (2612 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 0.02 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 16:17:05 2012 Optimize a model with 1176 rows, 1960 columns and 5040 nonzeros Presolve removed 44 rows and 660 columns Presolve time: 0.01s Presolved: 1132 rows, 1300 columns, 4380 nonzeros Variable types: 0 continuous, 1300 integer (1300 binary) Root relaxation: objective 0.000000e+00, 141 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 (141 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 16:17:05 2012 Optimize a model with 616 rows, 952 columns and 2352 nonzeros Presolve removed 44 rows and 308 columns Presolve time: 0.00s Presolved: 572 rows, 644 columns, 2044 nonzeros Variable types: 0 continuous, 644 integer (644 binary) Root relaxation: objective 0.000000e+00, 134 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 (134 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 16:17:05 2012 Optimize a model with 336 rows, 448 columns and 1008 nonzeros Presolve removed 44 rows and 132 columns Presolve time: 0.00s Presolved: 292 rows, 316 columns, 876 nonzeros Variable types: 0 continuous, 316 integer (316 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 (116 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 16:17:06 2012 Optimize a model with 196 rows, 196 columns and 336 nonzeros Presolve removed 196 rows and 196 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 16:17:06 2012 Optimize a model with 266 rows, 322 columns and 672 nonzeros Presolve removed 138 rows and 188 columns Presolve time: 0.00s Presolved: 128 rows, 134 columns, 384 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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