current bounds on the number of colors: 0 -- 167 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:56 2012 Optimize a model with 57852 rows, 14556 columns and 186916 nonzeros Presolve time: 0.17s Presolved: 57852 rows, 14556 columns, 186916 nonzeros Variable types: 0 continuous, 14556 integer (14556 binary) Root relaxation: objective 0.000000e+00, 643 iterations, 0.06 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 (1113 simplex iterations) in 0.36 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:57 2012 Optimize a model with 28662 rows, 7542 columns and 92332 nonzeros Presolve time: 0.14s Presolved: 28662 rows, 7542 columns, 92332 nonzeros Variable types: 0 continuous, 7542 integer (7542 binary) Root relaxation: objective 0.000000e+00, 434 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 (769 simplex iterations) in 0.19 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:58 2012 Optimize a model with 14067 rows, 4035 columns and 45040 nonzeros Presolve time: 0.05s Presolved: 14067 rows, 4035 columns, 45040 nonzeros Variable types: 0 continuous, 4035 integer (4035 binary) Root relaxation: objective 0.000000e+00, 337 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 (805 simplex iterations) in 0.09 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:58 2012 Optimize a model with 7117 rows, 2365 columns and 22520 nonzeros Presolve time: 0.02s Presolved: 7117 rows, 2365 columns, 22520 nonzeros Variable types: 0 continuous, 2365 integer (2365 binary) Root relaxation: objective 0.000000e+00, 375 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 (709 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:58 2012 Optimize a model with 3642 rows, 1530 columns and 11260 nonzeros Presolve time: 0.01s Presolved: 3642 rows, 1530 columns, 11260 nonzeros Variable types: 0 continuous, 1530 integer (1530 binary) Root relaxation: objective 0.000000e+00, 399 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 (1788 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:58 2012 Optimize a model with 1557 rows, 1029 columns and 4504 nonzeros Presolve removed 167 rows and 167 columns Presolve time: 0.00s Presolved: 1390 rows, 862 columns, 4170 nonzeros Variable types: 0 continuous, 862 integer (862 binary) Root relaxation: objective 0.000000e+00, 176 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 0 167 - 0.00000 - - 0s Explored 0 nodes (731 simplex iterations) in 0.02 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 20:26:58 2012 Optimize a model with 2252 rows, 1196 columns and 6756 nonzeros Presolve time: 0.01s Presolved: 2252 rows, 1196 columns, 6756 nonzeros Variable types: 0 continuous, 1196 integer (1196 binary) Root relaxation: objective 0.000000e+00, 378 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 421 - 0.00000 - - 0s 0 0 0.00000 0 409 - 0.00000 - - 0s 0 0 0.00000 0 468 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Clique: 2 Zero half: 407 Explored 0 nodes (6714 simplex iterations) in 0.88 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:26:59 2012 Optimize a model with 2947 rows, 1363 columns and 9008 nonzeros Presolve time: 0.01s Presolved: 2947 rows, 1363 columns, 9008 nonzeros Variable types: 0 continuous, 1363 integer (1363 binary) Root relaxation: objective 0.000000e+00, 360 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 414 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 305 - 0.00000 - - 1s 0 0 0.00000 0 380 - 0.00000 - - 1s 0 0 0.00000 0 354 - 0.00000 - - 2s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 2 0.00000 0 384 - 0.00000 - - 3s 603 78 0.00000 18 286 - 0.00000 - 61.0 5s 611 84 0.00000 22 180 - 0.00000 - 60.2 10s 897 177 infeasible 28 - 0.00000 - 124 15s 1635 445 infeasible 26 - 0.00000 - 126 20s * 2012 2 31 0.0000000 0.00000 0.0% 127 22s Cutting planes: Gomory: 1 Zero half: 19 Explored 2013 nodes (281217 simplex iterations) in 22.68 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: 4