Improve test in thread_manager, increase memory size to make it fit

src/simulator/loader.rs

@@ -490,7 +490,7 @@ impl Loader {
                 }
             }
         }
-        Ok(start_index as u64 + end_index)
+        Ok(start_index as u64 + end_index + 4)
     }
 
     /// Load the binary file and store it inside an array and try to parse it, 

src/simulator/machine.rs

@@ -75,7 +75,7 @@ pub const NUM_PHY_PAGE : u64 = 400;
 /// Must be 2^x
 pub const PAGE_SIZE : u64 = 128;
 /// Must be a multiple of PAGE_SIZE
-pub const MEM_SIZE : usize = (PAGE_SIZE*NUM_PHY_PAGE*100) as usize;
+pub const MEM_SIZE : usize = (PAGE_SIZE*NUM_PHY_PAGE*100_000) as usize;
 
 /// RISC-V Simulator
 pub struct Machine {