// verifast_options{disable_overflow_check target:ILP32}

// This file is part of the SV-Benchmarks collection of verification tasks:
// https://github.com/sosy-lab/sv-benchmarks
//
// This file was part of CPAchecker,
// a tool for configurable software verification:
// https://cpachecker.sosy-lab.org
//
// SPDX-FileCopyrightText: 2007-2020 Dirk Beyer <https://www.sosy-lab.org>
//
// SPDX-License-Identifier: Apache-2.0

extern void __assert_fail(const char *, const char *, unsigned int, const char *) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__));
void reach_error() //@ requires false; 
//@ ensures true;
{ __assert_fail("0", "nested_4.c", 13, "reach_error"); }

int main() //@ requires module(nested_4__verifast_instrumented_modified, true); 
//@ ensures junk();
{
	int a = 6;
	int b = 6;
	int c = 6;
	int d = 6;


	for(a = 0; a < 6; ++a)//@ invariant ((((b == 6) && (c == 6)) && (a <= 6)) && (d == 6));
 {
		for(b = 0; b < 6; ++b)//@ invariant ((((c == 6) && (b <= 6)) && (d == 6)) && (a <= 5));
 {
			for(c = 0; c < 6; ++c)//@ invariant (((((((((b <= 5) && (a <= 5)) && (c == 1)) || (((b <= 5) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 3))) || ((((c == 6) && (b <= 5)) && (d == 6)) && (a <= 5))) || (((b <= 5) && (c == 0)) && (a <= 5))) || (((b <= 5) && (c == 2)) && (a <= 5))) || (((b <= 5) && (c == 4)) && (a <= 5)));
 {
				for(d = 0; d < 6; ++d)//@ invariant (((((((((((((((b <= 5) && (5 == c)) && (d == 1)) && (a <= 5)) || ((((b <= 5) && (d == 3)) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 1))) || ((((d == 4) && (b <= 5)) && (5 == c)) && (a <= 5))) || ((((d == 0) && (b <= 5)) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 3))) || ((((b <= 5) && (5 == c)) && (d == 2)) && (a <= 5))) || (((b <= 5) && (c == 0)) && (a <= 5))) || ((((b <= 5) && (5 == c)) && (d == 6)) && (a <= 5))) || (((b <= 5) && (c == 2)) && (a <= 5))) || (((b <= 5) && (c == 4)) && (a <= 5))) || ((((b <= 5) && (5 == c)) && (5 == d)) && (a <= 5)));
 {

				}
			}
		}
	}
	if(!(a == 6 && b == 6 && c == 6 && d == 6 )) {
		reach_error();
	}
	return 1;
}