4 SPIN. ... 0 1 Hello, world! ( ) ";" , active proctype main() { printf("Hello, world!\n") } ­ , >spin hello.pml Hello, world! 1 process created Hello, world! ... mtype = { P, C }; mtype turn = P; active proctype producer() { do :: ( turn == P) - printf( Produce\n ); turn = C od } active proctype consumer() { do :: ( turn == C) - printf( Consume\n ); turn = P od } ( 1) ­ 0, (op on sequence) (guard) ­ mtype = { P, C }; mtype turn = P; active proctype producer() { do :: ( ...

463. AR-2 main_e