my program is producing correct outputs, but while submitting iam getting the following error.


Non Preemptive Scheduling:
Following test cases failed in your program; If you would like you can correct and do "Submit solution" again:
1. Test case failed with normal inputs for function: getWaitingTime()

Error:
*** glibc detected *** output/cnonpreemptivescheduling/testnonpreemptive.exe: free(): invalid size: 0x098e21a8 ***
======= Backtrace: =========
/lib/libc.so.6[0x721b16]
/lib/libc.so.6[0x7227a2]
/lib/libc.so.6(__libc_malloc+0x7e)[0x72335e]
/lib/ld-linux.so.2[0x6a7b62]
/lib/ld-linux.so.2[0x6acafd]
/lib/ld-linux.so.2[0x6a8e36]
/lib/ld-linux.so.2[0x6ac482]
/lib/libc.so.6[0x7bf722]
/lib/ld-linux.so.2[0x6a8e36]
/lib/libc.so.6(__libc_dlopen_mode+0x55)[0x7bf8d5]
/lib/libpthread.so.0[0x83aaf7]
/lib/libpthread.so.0[0x83ac21]
/lib/libpthread.so.0(__pthread_unwind+0x51)[0x8386f1]
/lib/libpthread.so.0(pthread_detach+0x0)[0x8333c0]
output/cnonpreemptivescheduling/testnonpreemptive.exe(__gxx_personality_v0+0x1a8)[0x8048e5c]
output/cnonpreemptivescheduling/testnonpreemptive.exe[0x804962c]
output/cnonpreemptivescheduling/testnonpreemptive.exe[0x8049182]
/lib/libpthread.so.0[0x83245b]
/lib/libc.so.6(clone+0x5e)[0x789c4e]
======= Memory map: ========
002c5000-003a5000 r-xp 00000000 fd:00 23359473 /usr/lib/libstdc++.so.6.0.8
003a5000-003a9000 r-xp 000df000 fd:00 23359473 /usr/lib/libstdc++.so.6.0.8
003a9000-003aa000 rwxp 000e3000 fd:00 23359473 /usr/lib/libstdc++.so.6.0.8
003aa000-003b0000 rwxp 003aa000 00:00 0
0069b000-006b5000 r-xp 00000000 fd:00 6490409 /lib/ld-2.5.so
006b5000-006b6000 r-xp 00019000 fd:00 6490409 /lib/ld-2.5.so
006b6000-006b7000 rwxp 0001a000 fd:00 6490409 /lib/ld-2.5.so
006b9000-007f6000 r-xp 00000000 fd:00 6490410 /lib/libc-2.5.so
007f6000-007f8000 r-xp 0013d000 fd:00 6490410 /lib/libc-2.5.so
007f8000-007f9000 rwxp 0013f000 fd:00 6490410 /lib/libc-2.5.so
007f9000-007fc000 rwxp 007f9000 00:00 0
007fe000-00823000 r-xp 00000000 fd:00 6490417 /lib/libm-2.5.so
00823000-00824000 r-xp 00024000 fd:00 6490417 /lib/libm-2.5.so
00824000-00825000 rwxp 00025000 fd:00 6490417 /lib/libm-2.5.so
0082d000-00840000 r-xp 00000000 fd:00 6490412 /lib/libpthread-2.5.so
00840000-00841000 r-xp 00012000 fd:00 6490412 /lib/libpthread-2.5.so
00841000-00842000 rwxp 00013000 fd:00 6490412 /lib/libpthread-2.5.so
00842000-00844000 rwxp 00842000 00:00 0
00c38000-00c43000 r-xp 00000000 fd:00 6490432 /lib/libgcc_s-4.1.2-20080102.so.1
00c43000-00c44000 rwxp 0000a000 fd:00 6490432 /lib/libgcc_s-4.1.2-20080102.so.1
08048000-0804c000 r-xp 00000000 00:12 9780811 output/cnonpreemptivescheduling/testnonpreemptive.exe
0804c000-0804d000 rwxp 00003000 00:12 9780811 output/cnonpreemptivescheduling/testnonpreemptive.exe
098e2000-09925000 rwxp 098e2000 00:00 0
b7400000-b7421000 rwxp b7400000 00:00 0
b7421000-b7500000 ---p b7421000 00:00 0
b7559000-b755a000 ---p b7559000 00:00 0
b755a000-b7f5c000 rwxp b755a000 00:00 0
b7f69000-b7f6b000 rwxp b7f69000 00:00 0
b7f6b000-b7f6c000 r-xp b7f6b000 00:00 0 [vdso]
bfa45000-bfa5a000 rw-p bfa45000 00:00 0 [stack]

but while doing in terminal i am not getting this type of error.
and my program is

#include<stdio.h>
#include<stdlib.h>
int* getWaitingTime(int* process, int* arrivalTime, int* burstTime, int nProcess);
int main()
{
int nProcess=3;
int *process=(int *)malloc(2*nProcess);
int *arrivalTime=(int*)malloc(2*nProcess);
int *burstTime=(int*)malloc(2*nProcess);
int proc[]={1,2,3};
int aTime[]={0,4,9};
int bTime[]={6,2,1};
int *a=(int *)malloc(2*nProcess);
int i;
for(i=0;i<nProcess;i++)
{
process[i]=proc[i];
arrivalTime[i]=aTime[i];
burstTime[i]=bTime[i];
}
a=getWaitingTime(process,arrivalTime,burstTime,nProcess);
if(a!=NULL)
{
for(i=0;i<nProcess;i++)
printf("%d\t",*(a+i));
}
else
printf("The function getWaitingTime returns NULL");
free(a);
return 0;
}
int* getWaitingTime(int* process, int* arrivalTime, int* burstTime, int nProcess)
{
int i;
int sum[10];
int bur[10];
int flag[10];
int *a=(int*)malloc(2*nProcess);
int sump=*burstTime;
int sumn;
int j;
int k;
int p;
int t;
if((*(arrivalTime)!=0) ||(*burstTime<0)||(*burstTime>10))
return (NULL);
for(i=1;i<nProcess;i++)
if((*(arrivalTime+i)==0)||*(arrivalTime+i-1)>*(arrivalTime+i)||(*(burstTime+i)<0)||(*(burstTime+i)>10))
return (NULL);
for(i=0;i<nProcess;i++) {
sum[i]=*(arrivalTime+i)+*(burstTime+i);
}
bur[0]=*(burstTime);
for(i=1;i<nProcess;i++)
flag[i]=0;
flag[0]=1;
for(i=1;i<nProcess;i++)
{
if(flag[i]==0)
{
sumn=0;
for(j=i;j<nProcess;j++)
{
if(flag[j]==0){
sumn=sumn+*(arrivalTime+j);
if(sumn>sump)
break;
}
}
k=j-1;
t=*(burstTime+i);
p=i;
for(j=i+1;j<=k;j++)
{
if(flag[j]==0){
if(*(burstTime+j)<t)
{
t=*(arrivalTime+j);
p=j;
}
}
}
sump+=*(burstTime+p);
bur[p]=sump;
flag[p]=1;
if(p!=i)
i=i-1;
}
}
for(i=0;i<nProcess;i++)
{
*(a+i)=bur[i]-sum[i];
if(*(a+i)<0)
return(NULL);
}
process=a;
return (process);
}

and the program is for nonpreemptive scheduling, which prints waiting times of the arrived processess.. actually the working tool is devsquare assessments.
i am unable to find the problem with my program.
i request you to tell me how i can get rid off this error..
thank u.

if(a!=NULL)
{
for(i=0;i<nProcess;i++)
printf("%d\t",*(a+i));
}
else
printf("The function getWaitingTime returns NULL");
free(a);
return 0;
}