current bounds on the number of colors: 0 -- 153 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:11 2012 Optimize a model with 45297 rows, 12222 columns and 147060 nonzeros Presolve time: 0.16s Presolved: 45297 rows, 12222 columns, 147060 nonzeros Variable types: 0 continuous, 12222 integer (12222 binary) Root relaxation: objective 0.000000e+00, 569 iterations, 0.04 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 (919 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:12 2012 Optimize a model with 22725 rows, 6408 columns and 73530 nonzeros Presolve time: 0.12s Presolved: 22725 rows, 6408 columns, 73530 nonzeros Variable types: 0 continuous, 6408 integer (6408 binary) Root relaxation: objective 0.000000e+00, 458 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 (752 simplex iterations) in 0.17 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:13 2012 Optimize a model with 11439 rows, 3501 columns and 36765 nonzeros Presolve time: 0.04s Presolved: 11439 rows, 3501 columns, 36765 nonzeros Variable types: 0 continuous, 3501 integer (3501 binary) Root relaxation: objective 0.000000e+00, 307 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 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:13 2012 Optimize a model with 5499 rows, 1971 columns and 17415 nonzeros Presolve time: 0.02s Presolved: 5499 rows, 1971 columns, 17415 nonzeros Variable types: 0 continuous, 1971 integer (1971 binary) Root relaxation: objective 0.000000e+00, 332 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 (594 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:13 2012 Optimize a model with 2529 rows, 1206 columns and 7740 nonzeros Presolve time: 0.01s Presolved: 2529 rows, 1206 columns, 7740 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 351 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 397 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 2 0.00000 0 225 - 0.00000 - - 0s * 243 3 17 0.0000000 0.00000 0.0% 67.8 1s Explored 244 nodes (25557 simplex iterations) in 1.57 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 18:52:14 2012 Optimize a model with 1341 rows, 900 columns and 3870 nonzeros Presolve removed 153 rows and 153 columns Presolve time: 0.00s Presolved: 1188 rows, 747 columns, 3564 nonzeros Variable types: 0 continuous, 747 integer (747 binary) Root relaxation: objective 0.000000e+00, 160 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 0 153 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (646 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 18:52:15 2012 Optimize a model with 1935 rows, 1053 columns and 5805 nonzeros Presolve time: 0.00s Presolved: 1935 rows, 1053 columns, 5805 nonzeros Variable types: 0 continuous, 1053 integer (1053 binary) Root relaxation: objective 0.000000e+00, 358 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3367 simplex iterations) in 0.30 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