In Example 11.13 we observed that Procedure breakCycles failed to break the cycles in a subgraph. This led to a test order in which four nodes are to be tested together. Examine Step 1 in Procedure...

In Example 11.13 we observed that Procedure breakCycles failed to break the cycles in a subgraph. This led to a test order in which four nodes are to be tested together. Examine Step 1 in Procedure breakCycles and explain why the cycle is not broken.