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import java.lang.Thread;
import org.cprover.CProver;
public class A
{
public static int g;
// expected verification success
public void me()
{
int g = CProver.getCurrentThreadID();
assert(g == 0);
}
// expected verification success
// --
// KNOWNBUG
// ---
// For some reason symex assigns 'g' to zero, even though
// the only viable assignment should be one.
// This issue seems to only occur when a variable is
// assigned inside the local scope of a thread-block.
//
// If instead, we call a function from inside the thread-block and
// then assign 'g' to 1 then as expected the only viable
// assignment to 'g' is 1 (see 'me4')
//
// Seems related to: https://github.com/diffblue/cbmc/issues/1630/
public void me_bug()
{
CProver.startThread(333);
int g = 1;
assert(g == 1);
CProver.endThread(333);
}
// expected verification success
// --
// KNOWNBUG: see me_bug()
public void me2()
{
CProver.startThread(333);
g = CProver.getCurrentThreadID();
assert(g == 1);
CProver.endThread(333);
}
// expected verification success
// --
// KNOWNBUG: see me_bug()
public void me3()
{
CProver.startThread(333);
int i = CProver.getCurrentThreadID();
assert(g == 1);
CProver.endThread(333);
}
// expected verification success.
public void me4()
{
CProver.startThread(333);
check();
CProver.endThread(333);
}
// expected verification success.
public void me5()
{
me();
B b = new B();
Thread tmp = new Thread(b);
tmp.start();
}
// expected verification success.
public void me6()
{
me();
C c = new C();
c.start();
}
public void check()
{
g = CProver.getCurrentThreadID();
assert(g == 1);
}
}
class B implements Runnable
{
public static int g;
@Override
public void run()
{
g = CProver.getCurrentThreadID();
assert(g == 1);
}
}
class C extends Thread
{
public static int g;
@Override
public void run()
{
g = CProver.getCurrentThreadID();
assert(g == 1);
}
}
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