current bounds on the number of colors: 0 -- 91 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 9316 rows, 4300 columns and 31770 nonzeros Presolve removed 1 rows and 45 columns Presolve time: 0.06s Presolved: 9315 rows, 4255 columns, 31725 nonzeros Variable types: 0 continuous, 4255 integer (4255 binary) Root relaxation: objective 0.000000e+00, 227 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 (227 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 -- 45 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 4601 rows, 2207 columns and 15532 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.02s Presolved: 4600 rows, 2185 columns, 15510 nonzeros Variable types: 0 continuous, 2185 integer (2185 binary) Root relaxation: objective 0.000000e+00, 207 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 (354 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 2346 rows, 1206 columns and 7766 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2345 rows, 1195 columns, 7755 nonzeros Variable types: 0 continuous, 1195 integer (1195 binary) Root relaxation: objective 0.000000e+00, 197 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 (332 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 1116 rows, 660 columns and 3530 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1115 rows, 655 columns, 3525 nonzeros Variable types: 0 continuous, 655 integer (655 binary) Root relaxation: objective 0.000000e+00, 222 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 (368 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 501 rows, 387 columns and 1412 nonzeros Presolve removed 91 rows and 92 columns Presolve time: 0.00s Presolved: 410 rows, 295 columns, 1230 nonzeros Variable types: 0 continuous, 295 integer (295 binary) Root relaxation: objective 0.000000e+00, 101 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 90 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (374 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:54 2012 Optimize a model with 706 rows, 478 columns and 2118 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 705 rows, 475 columns, 2115 nonzeros Variable types: 0 continuous, 475 integer (475 binary) Root relaxation: objective 0.000000e+00, 232 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 0 103 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 0s 0 0 0.00000 0 112 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3022 simplex iterations) in 0.14 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% optimal solution found: number of colors: 3