[Refactor] Apply color specification in adjacent relationship

[T0nyX1ang]

Current adjacent relationship are not tied to color, but it is possible to add a color specification on it.
This process may reduce propagation time, as many branches are ignored during the adjacent calculation.

[T0nyX1ang]

According to the tests on Yin-yang puzzle (of the edge test case), the former method can achieve a much better performance.
[Former]

Models       : 0
Calls        : 1
Time         : 36.029s (Solving: 36.01s 1st Model: 0.00s Unsat: 36.01s)
CPU Time     : 35.984s

Choices      : 1069923
Conflicts    : 835664   (Analyzed: 835663)
Restarts     : 2045     (Average: 408.64 Last: 22398)
Problems     : 1        (Average Length: 1.00 Splits: 0)
Lemmas       : 969747   (Deleted: 942197)
  Binary     : 1182     (Ratio:   0.12%)
  Ternary    : 1756     (Ratio:   0.18%)
  Conflict   : 835663   (Average Length:   39.9 Ratio:  86.17%)
  Loop       : 134084   (Average Length:   38.6 Ratio:  13.83%)
  Other      : 0        (Average Length:    0.0 Ratio:   0.00%)
Backjumps    : 835663   (Average:  1.27 Max:  26 Sum: 1060207)
  Executed   : 835598   (Average:  1.27 Max:  26 Sum: 1060142 Ratio:  99.99%)
  Bounded    : 65       (Average:  1.00 Max:   1 Sum:     65 Ratio:   0.01%)

Rules        : 10047
  Choice     : 91
Atoms        : 5039
Bodies       : 1265
Equivalences : 8277     (Atom=Atom: 4022 Body=Body: 18 Other: 4237)
Tight        : No       (SCCs: 2 Non-Hcfs: 0 Nodes: 790 Gammas: 0)
Variables    : 921      (Eliminated:    0 Frozen:  921)
Constraints  : 2689     (Binary:  69.9% Ternary:  20.8% Other:   9.3%)

[New]

Models       : 0
Calls        : 1
Time         : 44.203s (Solving: 44.17s 1st Model: 0.00s Unsat: 44.17s)
CPU Time     : 43.969s

Choices      : 1224537
Conflicts    : 937426   (Analyzed: 937425)
Restarts     : 2092     (Average: 448.10 Last: 228)
Problems     : 1        (Average Length: 1.00 Splits: 0)
Lemmas       : 1095932  (Deleted: 1073908)
  Binary     : 805      (Ratio:   0.07%)
  Ternary    : 1046     (Ratio:   0.10%)
  Conflict   : 937425   (Average Length:   41.7 Ratio:  85.54%)
  Loop       : 158507   (Average Length:   38.8 Ratio:  14.46%)
  Other      : 0        (Average Length:    0.0 Ratio:   0.00%)
Backjumps    : 937425   (Average:  1.29 Max:  14 Sum: 1213834)
  Executed   : 937363   (Average:  1.29 Max:  14 Sum: 1213772 Ratio:  99.99%)
  Bounded    : 62       (Average:  1.00 Max:   1 Sum:     62 Ratio:   0.01%)

  Choice     : 91
Atoms        : 5345
Bodies       : 1575
Equivalences : 9204     (Atom=Atom: 4344 Body=Body: 43 Other: 4817)
Tight        : No       (SCCs: 2 Non-Hcfs: 0 Nodes: 762 Gammas: 0)
Variables    : 1191     (Eliminated:    0 Frozen: 1177)
Constraints  : 3408     (Binary:  69.6% Ternary:  23.3% Other:   7.0%)