current bounds on the number of colors: 0 -- 230 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:06 2012 Optimize a model with 31395 rows, 26721 columns and 119945 nonzeros Presolve removed 17 rows and 1955 columns Presolve time: 0.15s Presolved: 31378 rows, 24766 columns, 117990 nonzeros Variable types: 0 continuous, 24766 integer (24766 binary) Root relaxation: objective 0.000000e+00, 409 iterations, 0.01 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 (409 simplex iterations) in 0.18 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 -- 115 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:07 2012 Optimize a model with 15677 rows, 13381 columns and 59451 nonzeros Presolve removed 17 rows and 969 columns Presolve time: 0.12s Presolved: 15660 rows, 12412 columns, 58482 nonzeros Variable types: 0 continuous, 12412 integer (12412 binary) Root relaxation: objective 0.000000e+00, 409 iterations, 0.01 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 (409 simplex iterations) in 0.13 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 -- 57 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:07 2012 Optimize a model with 7818 rows, 6711 columns and 29204 nonzeros Presolve removed 17 rows and 476 columns Presolve time: 0.05s Presolved: 7801 rows, 6235 columns, 28728 nonzeros Variable types: 0 continuous, 6235 integer (6235 binary) Root relaxation: objective 0.000000e+00, 409 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 (409 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:08 2012 Optimize a model with 4024 rows, 3491 columns and 14602 nonzeros Presolve removed 17 rows and 238 columns Presolve time: 0.02s Presolved: 4007 rows, 3253 columns, 14364 nonzeros Variable types: 0 continuous, 3253 integer (3253 binary) Root relaxation: objective 0.000000e+00, 437 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 (669 simplex iterations) in 0.03 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 Sat Dec 15 16:40:08 2012 Optimize a model with 2127 rows, 1881 columns and 7301 nonzeros Presolve removed 17 rows and 119 columns Presolve time: 0.01s Presolved: 2110 rows, 1762 columns, 7182 nonzeros Variable types: 0 continuous, 1762 integer (1762 binary) Root relaxation: objective 0.000000e+00, 388 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 (388 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:08 2012 Optimize a model with 1043 rows, 961 columns and 3129 nonzeros Presolve removed 17 rows and 51 columns Presolve time: 0.00s Presolved: 1026 rows, 910 columns, 3078 nonzeros Variable types: 0 continuous, 910 integer (910 binary) Root relaxation: objective 0.000000e+00, 415 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 6 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (763 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:08 2012 Optimize a model with 501 rows, 501 columns and 1043 nonzeros Presolve removed 501 rows and 501 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 16:40:08 2012 Optimize a model with 772 rows, 731 columns and 2086 nonzeros Presolve removed 234 rows and 253 columns Presolve time: 0.00s Presolved: 538 rows, 478 columns, 1614 nonzeros Variable types: 0 continuous, 478 integer (478 binary) Root relaxation: objective 0.000000e+00, 229 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 0 206 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (801 simplex iterations) in 0.01 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