current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:59 2012 Optimize a model with 45000 rows, 11848 columns and 145800 nonzeros Presolve time: 0.16s Presolved: 45000 rows, 11848 columns, 145800 nonzeros Variable types: 0 continuous, 11848 integer (11848 binary) Root relaxation: objective 0.000000e+00, 556 iterations, 0.05 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 (887 simplex iterations) in 0.26 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 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:00 2012 Optimize a model with 22276 rows, 6148 columns and 71928 nonzeros Presolve time: 0.11s Presolved: 22276 rows, 6148 columns, 71928 nonzeros Variable types: 0 continuous, 6148 integer (6148 binary) Root relaxation: objective 0.000000e+00, 482 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 (805 simplex iterations) in 0.16 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:00 2012 Optimize a model with 10914 rows, 3298 columns and 34992 nonzeros Presolve time: 0.04s Presolved: 10914 rows, 3298 columns, 34992 nonzeros Variable types: 0 continuous, 3298 integer (3298 binary) Root relaxation: objective 0.000000e+00, 312 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 (567 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:01 2012 Optimize a model with 5532 rows, 1948 columns and 17496 nonzeros Presolve time: 0.02s Presolved: 5532 rows, 1948 columns, 17496 nonzeros Variable types: 0 continuous, 1948 integer (1948 binary) Root relaxation: objective 0.000000e+00, 323 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 (738 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:01 2012 Optimize a model with 2542 rows, 1198 columns and 7776 nonzeros Presolve time: 0.01s Presolved: 2542 rows, 1198 columns, 7776 nonzeros Variable types: 0 continuous, 1198 integer (1198 binary) Root relaxation: objective 0.000000e+00, 350 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 0 280 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 1s 0 2 0.00000 0 341 - 0.00000 - - 1s * 79 0 23 0.0000000 0.00000 0.0% 74.5 1s Cutting planes: Zero half: 24 Explored 80 nodes (18207 simplex iterations) in 1.62 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 18:48:02 2012 Optimize a model with 1346 rows, 898 columns and 3888 nonzeros Presolve removed 150 rows and 150 columns Presolve time: 0.00s Presolved: 1196 rows, 748 columns, 3588 nonzeros Variable types: 0 continuous, 748 integer (748 binary) Root relaxation: objective 0.000000e+00, 161 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 0 150 - 0.00000 - - 0s Explored 0 nodes (666 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 18:48:02 2012 Optimize a model with 1944 rows, 1048 columns and 5832 nonzeros Presolve time: 0.00s Presolved: 1944 rows, 1048 columns, 5832 nonzeros Variable types: 0 continuous, 1048 integer (1048 binary) Root relaxation: objective 0.000000e+00, 364 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 0 294 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3260 simplex iterations) in 0.29 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: 4