@Ryan R the circuit is big. In saved raw file there are more than 11000 variables, so ngspice takes some time to parse all of this.

Title: ** sch_path: /home/ratul619/iit_study_vm/xschem/sim_1t1r_16x16_w7u_xschem_2107.sch
Date: Fri Jul 22 23:17:38  2022
Plotname: Transient Analysis
Flags: real
No. Variables: 11769
No. Points: 59

I simulated your netlist after changing only the .lib line to set my path.

time ngspice -b -r sim.raw sim.spice

simulation ended successfully after 1 minute:

No. of Data Rows : 59

Total analysis time (seconds) = 22.162

Total elapsed time (seconds) = 58.453 

Total DRAM available = 3780.684 MB.
DRAM currently available = 1648.426 MB.
Maximum ngspice program size =  692.473 MB.
Current ngspice program size =  668.254 MB.

Shared ngspice pages =   10.809 MB.
Text (code) pages =    7.520 MB.
Stack = 0 bytes.
Library pages =  665.762 MB.


real	0m58.548s
user	1m2.388s
sys	0m3.495s