current bounds on the number of colors: 0 -- 140 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:44 2012 Optimize a model with 33040 rows, 10270 columns and 108500 nonzeros Presolve time: 0.14s Presolved: 33040 rows, 10270 columns, 108500 nonzeros Variable types: 0 continuous, 10270 integer (10270 binary) Root relaxation: objective 0.000000e+00, 453 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 (738 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:45 2012 Optimize a model with 16590 rows, 5370 columns and 54250 nonzeros Presolve time: 0.08s Presolved: 16590 rows, 5370 columns, 54250 nonzeros Variable types: 0 continuous, 5370 integer (5370 binary) Root relaxation: objective 0.000000e+00, 342 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 (597 simplex iterations) in 0.12 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:45 2012 Optimize a model with 8130 rows, 2850 columns and 26350 nonzeros Presolve time: 0.03s Presolved: 8130 rows, 2850 columns, 26350 nonzeros Variable types: 0 continuous, 2850 integer (2850 binary) Root relaxation: objective 0.000000e+00, 291 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 (515 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:45 2012 Optimize a model with 3900 rows, 1590 columns and 12400 nonzeros Presolve time: 0.01s Presolved: 3900 rows, 1590 columns, 12400 nonzeros Variable types: 0 continuous, 1590 integer (1590 binary) Root relaxation: objective 0.000000e+00, 301 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 (542 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 18:39:45 2012 Optimize a model with 2020 rows, 1030 columns and 6200 nonzeros Presolve time: 0.01s Presolved: 2020 rows, 1030 columns, 6200 nonzeros Variable types: 0 continuous, 1030 integer (1030 binary) Root relaxation: objective 0.000000e+00, 333 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 0 124 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1686 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:45 2012 Optimize a model with 1080 rows, 750 columns and 3100 nonzeros Presolve removed 140 rows and 140 columns Presolve time: 0.00s Presolved: 940 rows, 610 columns, 2820 nonzeros Variable types: 0 continuous, 610 integer (610 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 0.00000 0 140 - 0.00000 - - 0s Explored 0 nodes (599 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 18:39:46 2012 Optimize a model with 1550 rows, 890 columns and 4650 nonzeros Presolve time: 0.00s Presolved: 1550 rows, 890 columns, 4650 nonzeros Variable types: 0 continuous, 890 integer (890 binary) Root relaxation: objective 0.000000e+00, 354 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 327 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 1s 0 0 0.00000 0 351 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 2 0.00000 0 347 - 0.00000 - - 1s Cutting planes: Zero half: 13 Explored 3 nodes (15999 simplex iterations) in 1.48 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