current bounds on the number of colors: 0 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 1260 rows, 2625 columns and 6156 nonzeros Presolve removed 23 rows and 828 columns Presolve time: 0.01s Presolved: 1237 rows, 1797 columns, 5328 nonzeros Variable types: 0 continuous, 1797 integer (1797 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 666 rows, 1329 columns and 3078 nonzeros Presolve removed 23 rows and 414 columns Presolve time: 0.00s Presolved: 643 rows, 915 columns, 2664 nonzeros Variable types: 0 continuous, 915 integer (915 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 369 rows, 681 columns and 1539 nonzeros Presolve removed 23 rows and 207 columns Presolve time: 0.00s Presolved: 346 rows, 474 columns, 1332 nonzeros Variable types: 0 continuous, 474 integer (474 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 204 rows, 321 columns and 684 nonzeros Presolve removed 23 rows and 92 columns Presolve time: 0.00s Presolved: 181 rows, 229 columns, 592 nonzeros Variable types: 0 continuous, 229 integer (229 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% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 138 rows, 177 columns and 342 nonzeros Presolve removed 94 rows and 128 columns Presolve time: 0.00s Presolved: 44 rows, 49 columns, 132 nonzeros Variable types: 0 continuous, 49 integer (49 binary) Root relaxation: objective 0.000000e+00, 20 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 (20 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:55 2012 Optimize a model with 105 rows, 105 columns and 171 nonzeros Presolve removed 105 rows and 105 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 - optimal solution found: number of colors: 2