MAX_OFFSET_DIFF_S1_S2
rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2;
rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2;
rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2;
rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2;
alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2;