Fix minimization missing last empty branch

[IlyaMuravjov]

Description

Say we have two executions with the following coveredInstructions respectively:

Instruction(className=org/example/Main, methodSignature=methodUnderTest(Z)V, lineNumber=9, id=9)
Instruction(className=org/example/Main, methodSignature=methodUnderTest(Z)V, lineNumber=10, id=10)
Instruction(className=org/example/Main, methodSignature=methodUnderTest(Z)V, lineNumber=10, id=11)

Instruction(className=org/example/Main, methodSignature=methodUnderTest(Z)V, lineNumber=9, id=9)

Instruction with id=9 used to not be considered a branch instruction because it's always followed by instruction with id=10, while in reality it is a branch instruction because sometimes it's the last instruction and sometimes it is not.

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