#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ freeSegment(int, int);
int /*<<< orphan*/ printf(char *, int);
scalar_t__ pthread_self();
int /*<<< orphan*/ useSegment(int, int);
int /*<<< orphan*/ usleep(int);
void *trainDK(void *arg) {
  while (1) {
    useSegment(3, 2);
    printf("Train DK ID = %d occupies DC\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(3, 2);
    printf("Train DK ID = %d left DC\n", (int)pthread_self());
    useSegment(2, 6);
    printf("Train DK ID = %d occupies CF\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(2, 6);
    printf("Train DK ID = %d left CF\n", (int)pthread_self());
    useSegment(6, 7);
    printf("Train DK ID = %d occupies FG\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(6, 7);
    printf("Train DK ID = %d left FG\n", (int)pthread_self());
    useSegment(7, 12);
    printf("Train DK ID = %d occupies GL\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(7, 12);
    printf("Train DK ID = %d left GL\n", (int)pthread_self());
    useSegment(12, 16);
    printf("Train DK ID = %d occupies LP\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(12, 16);
    printf("Train DK ID = %d left LP\n", (int)pthread_self());
    useSegment(16, 11);
    printf("Train DK ID = %d occupies PK\n", (int)pthread_self());
    usleep(6000000);
    freeSegment(16, 11);
    printf("Train DK ID = %d left PK [FINISHED]\n", (int)pthread_self());
    break;
  }
}


x86 assembly (clang, -O0):
<trainDK>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    $0x3,%edi
mov    $0x2,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe85(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x3,%edi
mov    $0x2,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe75(%rip),%rdi
call   1030 <printf@plt>
mov    $0x2,%edi
mov    $0x6,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe6b(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x2,%edi
mov    $0x6,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe5b(%rip),%rdi
call   1030 <printf@plt>
mov    $0x6,%edi
mov    $0x7,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe51(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x6,%edi
mov    $0x7,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe41(%rip),%rdi
call   1030 <printf@plt>
mov    $0x7,%edi
mov    $0xc,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe37(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x7,%edi
mov    $0xc,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe27(%rip),%rdi
call   1030 <printf@plt>
mov    $0xc,%edi
mov    $0x10,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe1d(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0xc,%edi
mov    $0x10,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe0d(%rip),%rdi
call   1030 <printf@plt>
mov    $0x10,%edi
mov    $0xb,%esi
call   1040 <useSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xe03(%rip),%rdi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x10,%edi
mov    $0xb,%esi
call   1060 <freeSegment@plt>
mov    $0x0,%al
call   1050 <pthread_self@plt>
mov    %eax,%esi
lea    0xdf3(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<trainDK>:
push   %rax
mov    $0x3,%edi
mov    $0x2,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe92(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x3,%edi
mov    $0x2,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe82(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x2,%edi
mov    $0x6,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe78(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x2,%edi
mov    $0x6,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe68(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x6,%edi
mov    $0x7,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe5e(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x6,%edi
mov    $0x7,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe4e(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x7,%edi
mov    $0xc,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe44(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x7,%edi
mov    $0xc,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe34(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0xc,%edi
mov    $0x10,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe2a(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0xc,%edi
mov    $0x10,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe1a(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x10,%edi
mov    $0xb,%esi
call   1040 <useSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe10(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x5b8d80,%edi
call   1070 <usleep@plt>
mov    $0x10,%edi
mov    $0xb,%esi
call   1060 <freeSegment@plt>
xor    %eax,%eax
call   1050 <pthread_self@plt>
lea    0xe00(%rip),%rdi
mov    %eax,%esi
pop    %rax
jmp    1030 <printf@plt>

LLVM IR (-O0):
@.str = [30 x i8] c"Train DK ID = %d occupies DC\0A\00"
@.str.1 = [26 x i8] c"Train DK ID = %d left DC\0A\00"
@.str.2 = [30 x i8] c"Train DK ID = %d occupies CF\0A\00"
@.str.3 = [26 x i8] c"Train DK ID = %d left CF\0A\00"
@.str.4 = [30 x i8] c"Train DK ID = %d occupies FG\0A\00"
@.str.5 = [26 x i8] c"Train DK ID = %d left FG\0A\00"
@.str.6 = [30 x i8] c"Train DK ID = %d occupies GL\0A\00"
@.str.7 = [26 x i8] c"Train DK ID = %d left GL\0A\00"
@.str.8 = [30 x i8] c"Train DK ID = %d occupies LP\0A\00"
@.str.9 = [26 x i8] c"Train DK ID = %d left LP\0A\00"
@.str.10 = [30 x i8] c"Train DK ID = %d occupies PK\0A\00"
@.str.11 = [37 x i8] c"Train DK ID = %d left PK [FINISHED]\0A\00"
define i8* @trainDK(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %3
br label %4
4: ; preds = %1
%5 = call i32 @useSegment(i32 3, i32 2)
%6 = call i64 (...) @pthread_self()
%7 = trunc i64 %6 to i32
%8 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = call i32 @usleep(i32 6000000)
%10 = call i32 @freeSegment(i32 3, i32 2)
%11 = call i64 (...) @pthread_self()
%12 = trunc i64 %11 to i32
%13 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0), i32 %12)
%14 = call i32 @useSegment(i32 2, i32 6)
%15 = call i64 (...) @pthread_self()
%16 = trunc i64 %15 to i32
%17 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.2, i64 0, i64 0), i32 %16)
%18 = call i32 @usleep(i32 6000000)
%19 = call i32 @freeSegment(i32 2, i32 6)
%20 = call i64 (...) @pthread_self()
%21 = trunc i64 %20 to i32
%22 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i32 %21)
%23 = call i32 @useSegment(i32 6, i32 7)
%24 = call i64 (...) @pthread_self()
%25 = trunc i64 %24 to i32
%26 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.4, i64 0, i64 0), i32 %25)
%27 = call i32 @usleep(i32 6000000)
%28 = call i32 @freeSegment(i32 6, i32 7)
%29 = call i64 (...) @pthread_self()
%30 = trunc i64 %29 to i32
%31 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.5, i64 0, i64 0), i32 %30)
%32 = call i32 @useSegment(i32 7, i32 12)
%33 = call i64 (...) @pthread_self()
%34 = trunc i64 %33 to i32
%35 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.6, i64 0, i64 0), i32 %34)
%36 = call i32 @usleep(i32 6000000)
%37 = call i32 @freeSegment(i32 7, i32 12)
%38 = call i64 (...) @pthread_self()
%39 = trunc i64 %38 to i32
%40 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.7, i64 0, i64 0), i32 %39)
%41 = call i32 @useSegment(i32 12, i32 16)
%42 = call i64 (...) @pthread_self()
%43 = trunc i64 %42 to i32
%44 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.8, i64 0, i64 0), i32 %43)
%45 = call i32 @usleep(i32 6000000)
%46 = call i32 @freeSegment(i32 12, i32 16)
%47 = call i64 (...) @pthread_self()
%48 = trunc i64 %47 to i32
%49 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.9, i64 0, i64 0), i32 %48)
%50 = call i32 @useSegment(i32 16, i32 11)
%51 = call i64 (...) @pthread_self()
%52 = trunc i64 %51 to i32
%53 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.10, i64 0, i64 0), i32 %52)
%54 = call i32 @usleep(i32 6000000)
%55 = call i32 @freeSegment(i32 16, i32 11)
%56 = call i64 (...) @pthread_self()
%57 = trunc i64 %56 to i32
%58 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.11, i64 0, i64 0), i32 %57)
br label %59
59: ; preds = %4
%60 = load i8*, i8** %2
ret i8* %60
}

LLVM IR (-O2):
@.str = [30 x i8] c"Train DK ID = %d occupies DC\0A\00"
@.str.1 = [26 x i8] c"Train DK ID = %d left DC\0A\00"
@.str.2 = [30 x i8] c"Train DK ID = %d occupies CF\0A\00"
@.str.3 = [26 x i8] c"Train DK ID = %d left CF\0A\00"
@.str.4 = [30 x i8] c"Train DK ID = %d occupies FG\0A\00"
@.str.5 = [26 x i8] c"Train DK ID = %d left FG\0A\00"
@.str.6 = [30 x i8] c"Train DK ID = %d occupies GL\0A\00"
@.str.7 = [26 x i8] c"Train DK ID = %d left GL\0A\00"
@.str.8 = [30 x i8] c"Train DK ID = %d occupies LP\0A\00"
@.str.9 = [26 x i8] c"Train DK ID = %d left LP\0A\00"
@.str.10 = [30 x i8] c"Train DK ID = %d occupies PK\0A\00"
@.str.11 = [37 x i8] c"Train DK ID = %d left PK [FINISHED]\0A\00"
define noalias i8* @trainDK(i8* nocapture readnone %0) {
%2 = tail call i32 @useSegment(i32 3, i32 2)
%3 = tail call i64 (...) @pthread_self()
%4 = trunc i64 %3 to i32
%5 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = tail call i32 @usleep(i32 6000000)
%7 = tail call i32 @freeSegment(i32 3, i32 2)
%8 = tail call i64 (...) @pthread_self()
%9 = trunc i64 %8 to i32
%10 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0), i32 %9)
%11 = tail call i32 @useSegment(i32 2, i32 6)
%12 = tail call i64 (...) @pthread_self()
%13 = trunc i64 %12 to i32
%14 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.2, i64 0, i64 0), i32 %13)
%15 = tail call i32 @usleep(i32 6000000)
%16 = tail call i32 @freeSegment(i32 2, i32 6)
%17 = tail call i64 (...) @pthread_self()
%18 = trunc i64 %17 to i32
%19 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i32 %18)
%20 = tail call i32 @useSegment(i32 6, i32 7)
%21 = tail call i64 (...) @pthread_self()
%22 = trunc i64 %21 to i32
%23 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.4, i64 0, i64 0), i32 %22)
%24 = tail call i32 @usleep(i32 6000000)
%25 = tail call i32 @freeSegment(i32 6, i32 7)
%26 = tail call i64 (...) @pthread_self()
%27 = trunc i64 %26 to i32
%28 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.5, i64 0, i64 0), i32 %27)
%29 = tail call i32 @useSegment(i32 7, i32 12)
%30 = tail call i64 (...) @pthread_self()
%31 = trunc i64 %30 to i32
%32 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.6, i64 0, i64 0), i32 %31)
%33 = tail call i32 @usleep(i32 6000000)
%34 = tail call i32 @freeSegment(i32 7, i32 12)
%35 = tail call i64 (...) @pthread_self()
%36 = trunc i64 %35 to i32
%37 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.7, i64 0, i64 0), i32 %36)
%38 = tail call i32 @useSegment(i32 12, i32 16)
%39 = tail call i64 (...) @pthread_self()
%40 = trunc i64 %39 to i32
%41 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.8, i64 0, i64 0), i32 %40)
%42 = tail call i32 @usleep(i32 6000000)
%43 = tail call i32 @freeSegment(i32 12, i32 16)
%44 = tail call i64 (...) @pthread_self()
%45 = trunc i64 %44 to i32
%46 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.9, i64 0, i64 0), i32 %45)
%47 = tail call i32 @useSegment(i32 16, i32 11)
%48 = tail call i64 (...) @pthread_self()
%49 = trunc i64 %48 to i32
%50 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.10, i64 0, i64 0), i32 %49)
%51 = tail call i32 @usleep(i32 6000000)
%52 = tail call i32 @freeSegment(i32 16, i32 11)
%53 = tail call i64 (...) @pthread_self()
%54 = trunc i64 %53 to i32
%55 = tail call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.11, i64 0, i64 0), i32 %54)
ret i8* undef
}