current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:52 2012 Optimize a model with 30160 rows, 8912 columns and 98540 nonzeros Presolve time: 0.14s Presolved: 30160 rows, 8912 columns, 98540 nonzeros Variable types: 0 continuous, 8912 integer (8912 binary) Root relaxation: objective 0.000000e+00, 404 iterations, 0.02 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 (671 simplex iterations) in 0.21 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:53 2012 Optimize a model with 14914 rows, 4622 columns and 48512 nonzeros Presolve time: 0.07s Presolved: 14914 rows, 4622 columns, 48512 nonzeros Variable types: 0 continuous, 4622 integer (4622 binary) Root relaxation: objective 0.000000e+00, 292 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 (625 simplex iterations) in 0.11 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:53 2012 Optimize a model with 7522 rows, 2542 columns and 24256 nonzeros Presolve time: 0.03s Presolved: 7522 rows, 2542 columns, 24256 nonzeros Variable types: 0 continuous, 2542 integer (2542 binary) Root relaxation: objective 0.000000e+00, 269 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 (492 simplex iterations) in 0.04 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:53 2012 Optimize a model with 3826 rows, 1502 columns and 12128 nonzeros Presolve time: 0.01s Presolved: 3826 rows, 1502 columns, 12128 nonzeros Variable types: 0 continuous, 1502 integer (1502 binary) Root relaxation: objective 0.000000e+00, 294 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 (511 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:53 2012 Optimize a model with 1978 rows, 982 columns and 6064 nonzeros Presolve time: 0.01s Presolved: 1978 rows, 982 columns, 6064 nonzeros Variable types: 0 continuous, 982 integer (982 binary) Root relaxation: objective 0.000000e+00, 304 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 0 215 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4696 simplex iterations) in 0.27 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 Fri Dec 14 18:34:54 2012 Optimize a model with 1054 rows, 722 columns and 3032 nonzeros Presolve removed 130 rows and 130 columns Presolve time: 0.00s Presolved: 924 rows, 592 columns, 2772 nonzeros Variable types: 0 continuous, 592 integer (592 binary) Root relaxation: objective 0.000000e+00, 132 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 0 130 - 0.00000 - - 0s Explored 0 nodes (551 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 - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:54 2012 Optimize a model with 1516 rows, 852 columns and 4548 nonzeros Presolve time: 0.00s Presolved: 1516 rows, 852 columns, 4548 nonzeros Variable types: 0 continuous, 852 integer (852 binary) Root relaxation: objective 0.000000e+00, 283 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 303 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 1s 0 2 0.00000 0 337 - 0.00000 - - 1s Cutting planes: Zero half: 11 Explored 5 nodes (12924 simplex iterations) in 1.26 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4