Test auto/RW-G+RW-R3I+RW-G+RW-R3I

LISA auto/RW-G+RW-R3I+RW-G+RW-R3I
(*
 * Result: Sometimes
 * 
 * Process 0 starts (t=9999999).
 * 
 * P0 advances one grace period (t=10099999).
 * 
 * P1 is unordered, therefore cycle is allowed.
 * Skipping remainder of analysis.
 *)
{
}
 P0            | P1                 | P2            | P3                 ;
 r[once] r1 x0 | f[rcu_read_lock]   | r[once] r1 x2 | f[rcu_read_lock]   ;
 f[sync]       | w[once] x2 1       | f[sync]       | w[once] x0 1       ;
 w[once] x1 1  | f[rcu_read_unlock] | w[once] x3 1  | f[rcu_read_unlock] ;
               | f[rcu_read_lock]   |               | f[rcu_read_lock]   ;
               | r[once] r1 x1      |               | r[once] r1 x3      ;
               | f[rcu_read_unlock] |               | f[rcu_read_unlock] ;
Observed
    3:r1=1; 2:r1=1; 1:r1=1; 0:r1=1;