Cobertura report not increasing the code coverage with Powermock - maven

Question

I am using Cobertura maven plugin [version 2.7] to understand the code coverage for my tests. I am using PowerMock [version 1.6.6] to mock dependent objects. But when I run mvn cobertura:cobertura and check the report, the coverage remains the same. It works fine when I do not use mocking. Is this a compatibility issue?
I tried mvn clean multiple times just to be sure that the report is newly generated.
Here is my pom.xml
<properties>
<powermock.version>1.6.6</powermock.version>
</properties>
<build>
<plugins>
<!-- Cobertura plugin for code coverage -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>cobertura-maven-plugin</artifactId>
<version>2.7</version>
<configuration>
<formats>
<format>html</format>
<format>xml</format>
</formats>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>${powermock.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>${powermock.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
Any help on this is appreciated.

Answer 1

Unfortunately, there's a big chance that it's impossible. I don't know how exactly Cobertura works, but I suspect that it uses same approach like a JaCoCo and modifies byte code with Java Agent.
But PowerMock reads classes from disk when loads a class, so all changes are lost.
One small change that Cobertura can modify classes during compile time. If yes, then you may try it.
Cobertura project looks abandoned, so I don't see any reason to spend time on integrating with not supported project. I'd like to focus on integration with JaCoCo and provides supporting on-fly instrumenting.