MCU restarting after few seconds

#include "J:\Data\UIT WORK\FYP\Workshop\Material\lecture 04\LED PROJECT\CODE\led project.h"
void TRBL(int k);
void TRBL_Rv(int k);
void TRBL_all(int k,int j);
void msd(int td);

#define fo portb0
#define ba portb1
#define to portb2
#define le portb3
#define ri portb4
#define bo portb5



unsigned int k,i,j;
void main()
{

   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_psp(PSP_DISABLED);
   setup_spi(SPI_SS_DISABLED);
   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
   setup_timer_1(T1_DISABLED);
   setup_timer_2(T2_DISABLED,0,1);
   setup_comparator(NC_NC_NC_NC);
   setup_vref(FALSE);

   // TODO: USER CODE!!
   TRISB=0x00;
   PORTB=0x00;
   while(1)
   {
   TRBL(500);
   TRBL_RV(500);
   TRBL_all(3,500);
   
   }
}

void TRBL(k)
{
to=1;             // top on
delay_ms(k);
to=0;
ri=1;             //right on
delay_ms(k);
ri=0;
bo=1;             //bottom on
delay_ms(k);
bo=0;
le=1;             //left on
delay_ms(k);
le=0;
}

void TRBL_Rv(k)
{
to=1;             // top on
delay_ms(k);
to=0;
le=1;             //left on
delay_ms(k);
le=0;
bo=1;             //bottom on
delay_ms(k);
bo=0;
ri=1;             //left on
delay_ms(k);
ri=0;
}
void TRBL_all(k,j)
{
while(k>0)
   {
   to=le=ri=bo=1;
   delay_ms(j);
   to=le=ri=bo=0;
   j=j*2;
   delay_ms(j);                                                                           ///////////////Here is my PROGRAM RESTARTS
   k--;
   }
}

void msd(int td)
{
for(i=0;i<td;i++)
   for(j=0;j<135;j++)
   {}
}