Initializing AMReX (26.08-21-g3b31af42a8b8)...
Initializing CUDA...
CUDA initialized with 1 device.
AMReX (26.08-21-g3b31af42a8b8) initialized

Starting run at 07:55:47 UTC on 2026-08-18.
Successfully read inputs file ... 

Castro git describe: 26.08-1-gf0b335c8a
AMReX git describe: 26.08-21-g3b31af42a
Microphysics git describe: 26.08-10-g21581f4b

reading extern runtime parameters ...
13 Species: 
He4  C12  O16  Ne20  Mg24  Si28  S32  Ar36  Ca40  Ti44  Cr48  Fe52  Ni56  
Successfully read inputs file ... 
Creating primary with CO core with mass fractions C = 0.4and O = 0.6 and a He shell of solar mass =0.
Creating secondary with CO core with mass fractions C = 0.4and O = 0.6 and a He shell of solar mass =0.

Generated initial model for primary WD of mass 0.9 solar masses, central density 1.574e+07 g cm**-3, and radius 6.747e+08 cm.

Generated initial model for secondary WD of mass 0.9 solar masses, central density 1.574e+07 g cm**-3, and radius 6.747e+08 cm.

Generated binary orbit of distance 1.781e+09 cm = 1.190e-04 AU.
The primary orbits the center of mass at distance -8.903e+08 cm = -5.951e-05 AU.
The secondary orbits the center of mass at distance 8.903e+08 cm = 5.951e-05 AU.
The initial orbital period is 30.543687 s.
The initial orbital speed of the primary is -1.831e+08 cm/s.
The initial orbital speed of the secondary is 1.831e+08 cm/s.

Castro::numpts_1d at level  0 is 174
Setting the gravity type to PoissonGrav
Initializing the data at level 0
Done initializing the level 0 data 
...estimated hydro-limited timestep at level 0: 0.05426072637
...hydro-limited CFL timestep constrained at (i,j,k) = (29,63,95)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.05426072637

grid_places() time: 0.003134446 new finest: 0
Now regridding at level lbase = 0
grid_places() time: 0.001919406 new finest: 0
STEP = 0 TIME = 0 : REGRID  with lbase = 0

Gravity::fill_multipole_BCs() time = 0.008615761

Gravity::multilevel_solve_for_new_phi() time = 0.041148165

INITIAL GRIDS 
  Level 0   27 grids  884736 cells  100 % of domain
            smallest grid: 32 x 32 x 32  biggest grid: 32 x 32 x 32

PLOTFILE: file = wdmerger_3D_plt00000
Write plotfile time = 0.102981641  seconds

...estimated hydro-limited timestep at level 0: 0.05426072637
...hydro-limited CFL timestep constrained at (i,j,k) = (29,63,95)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.05426072637

[Level 0 step 1] ADVANCE at time 0 with dt = 0.005426072637

  Beginning subcycle 1 starting at time 0 with dt = 0.005426072637
  Estimated number of subcycles remaining: 1

Castro::construct_old_gravity() time = 0.005786051 on level 0

Castro::do_old_sources() time = 0.004439766 on level 0

Castro::do_old_sources() time = 0.00797517 on level 0

... Entering construct_ctu_hydro_source() on level 0

... Leaving construct_ctu_hydro_source() on level 0

Castro::construct_ctu_hydro_source() time = 0.07801815 on level 0


... new-time composite Poisson gravity solve from level 0 to level 0

Gravity::fill_multipole_BCs() time = 0.006663845

Gravity::multilevel_solve_for_new_phi() time = 0.031885272

Castro::construct_new_gravity() time = 0.037499437 on level 0

Castro::do_new_sources() time = 0.006342833 on level 0

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond at this level: 5.337933427

[Level 0 step 1] Advanced 884736 cells

  Updating the rotational period from 30.54368673 s to 30.46017574 s.


[STEP 1] Coarse TimeStep time: 0.174137548
[STEP 1] FAB kilobyte spread across MPI nodes: [1776890 ... 1776890]


STEP = 1 TIME = 0.005426072637 DT = 0.005426072637

...estimated hydro-limited timestep at level 0: 0.05461684804
...hydro-limited CFL timestep constrained at (i,j,k) = (0,29,94)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.05461684804

Castro::compute_new_dt : limiting dt at level 0
 ... new dt computed: 0.05461684804
 ... but limiting to: 0.0059686799 = 1.1 * 0.005426072637
Now regridding at level lbase = 0
grid_places() time: 0.002390888 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006876991

Gravity::multilevel_solve_for_new_phi() time = 0.053069888

STEP = 1 TIME = 0.005426072637 : REGRID  with lbase = 0
  Level 1   2 grids  65536 cells  0.9259259259 % of domain
            smallest grid: 32 x 32 x 32  biggest grid: 32 x 32 x 32

...estimated hydro-limited timestep at level 0: 0.05461684804
...hydro-limited CFL timestep constrained at (i,j,k) = (0,29,94)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.05461684804

...estimated hydro-limited timestep at level 1: 2.526135647e-09
...hydro-limited CFL timestep constrained at (i,j,k) = (104,88,99)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 2.526135647e-09

[Level 0 step 2] ADVANCE at time 0.005426072637 with dt = 2.526135647e-09

  Beginning subcycle 1 starting at time 0.005426072637 with dt = 2.526135647e-09
  Estimated number of subcycles remaining: 1

Castro::construct_old_gravity() time = 0.004753182 on level 0

Castro::do_old_sources() time = 0.003931815 on level 0

Castro::do_old_sources() time = 0.005962572 on level 0

... Entering construct_ctu_hydro_source() on level 0

... Leaving construct_ctu_hydro_source() on level 0

Castro::construct_ctu_hydro_source() time = 0.091164496 on level 0

Castro::construct_old_gravity() time = 0.000327641 on level 1

Castro::do_old_sources() time = 0.000831528 on level 1

Castro::do_old_sources() time = 0.00198622 on level 1

... Entering construct_ctu_hydro_source() on level 1

... Leaving construct_ctu_hydro_source() on level 1

Castro::construct_ctu_hydro_source() time = 0.01049371 on level 1

Castro::reflux() at level 0 : time = 0.020303272

... new-time composite Poisson gravity solve from level 0 to level 1

Gravity::fill_multipole_BCs() time = 0.00665374

Gravity::multilevel_solve_for_new_phi() time = 0.031644304

Castro::construct_new_gravity() time = 0.036524625 on level 0

Castro::do_new_sources() time = 0.007405822 on level 0

Castro::construct_new_gravity() time = 0.000357557 on level 1

Castro::do_new_sources() time = 0.001474102 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.443603612

[Level 0 step 2] Advanced 884736 cells
[Level 1 step 2] ADVANCE at time 0.005426072637 with dt = 2.526135647e-09

  Advance at this level has already been completed.

[Level 1 step 2] Advanced 65536 cells

  Updating the rotational period from 30.46017574 s to 30.52759479 s.


[STEP 2] Coarse TimeStep time: 0.289541709
[STEP 2] FAB kilobyte spread across MPI nodes: [2384284 ... 2384284]


STEP = 2 TIME = 0.005426075163 DT = 2.526135647e-09

...estimated hydro-limited timestep at level 0: 0.0008044208529
...hydro-limited CFL timestep constrained at (i,j,k) = (37,49,42)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.0008044208529

...estimated hydro-limited timestep at level 1: 6.697001619e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 6.697001619e-07

Castro::compute_new_dt : limiting dt at level 0
 ... new dt computed: 0.0008044208529
 ... but limiting to: 2.778749212e-09 = 1.1 * 2.526135647e-09
Castro::compute_new_dt : limiting dt at level 1
 ... new dt computed: 6.697001619e-07
 ... but limiting to: 2.778749212e-09 = 1.1 * 2.526135647e-09
Now regridding at level lbase = 0
grid_places() time: 0.003262237 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006759983

Gravity::multilevel_solve_for_new_phi() time = 0.014507935

STEP = 2 TIME = 0.005426075163 : REGRID  with lbase = 0
  Level 1   2 grids  65536 cells  0.9259259259 % of domain
            smallest grid: 32 x 32 x 32  biggest grid: 32 x 32 x 32

...estimated hydro-limited timestep at level 0: 0.0008044208529
...hydro-limited CFL timestep constrained at (i,j,k) = (37,49,42)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.0008044208529

...estimated hydro-limited timestep at level 1: 6.697001619e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 6.697001619e-07

[Level 0 step 3] ADVANCE at time 0.005426075163 with dt = 2.778749212e-09

  Beginning subcycle 1 starting at time 0.005426075163 with dt = 2.778749212e-09
  Estimated number of subcycles remaining: 1

Castro::construct_old_gravity() time = 0.004736919 on level 0

Castro::do_old_sources() time = 0.003895312 on level 0

Castro::do_old_sources() time = 0.005836412 on level 0

... Entering construct_ctu_hydro_source() on level 0

... Leaving construct_ctu_hydro_source() on level 0

Castro::construct_ctu_hydro_source() time = 0.13234117 on level 0

Castro::construct_old_gravity() time = 0.000322708 on level 1

Castro::do_old_sources() time = 0.000869659 on level 1

Castro::do_old_sources() time = 0.001244851 on level 1

... Entering construct_ctu_hydro_source() on level 1

... Leaving construct_ctu_hydro_source() on level 1

Castro::construct_ctu_hydro_source() time = 0.010422593 on level 1

Castro::reflux() at level 0 : time = 0.016821409

... new-time composite Poisson gravity solve from level 0 to level 1

Gravity::fill_multipole_BCs() time = 0.006679132

Gravity::multilevel_solve_for_new_phi() time = 0.023528125

Castro::construct_new_gravity() time = 0.027707895 on level 0

Castro::do_new_sources() time = 0.004987941 on level 0

Castro::construct_new_gravity() time = 0.000364319 on level 1

Castro::do_new_sources() time = 0.001801908 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 3.910358543

[Level 0 step 3] Advanced 884736 cells
[Level 1 step 3] ADVANCE at time 0.005426075163 with dt = 2.778749212e-09

  Advance at this level has already been completed.

[Level 1 step 3] Advanced 65536 cells

  Updating the rotational period from 30.52759479 s to 30.52761298 s.


[STEP 3] Coarse TimeStep time: 0.285604227
[STEP 3] FAB kilobyte spread across MPI nodes: [2384284 ... 2384284]


STEP = 3 TIME = 0.005426077942 DT = 2.778749212e-09

...estimated hydro-limited timestep at level 0: 0.000804308035
...hydro-limited CFL timestep constrained at (i,j,k) = (37,49,42)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.000804308035

...estimated hydro-limited timestep at level 1: 6.965184638e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 6.965184638e-07

Castro::compute_new_dt : limiting dt at level 0
 ... new dt computed: 0.000804308035
 ... but limiting to: 3.056624133e-09 = 1.1 * 2.778749212e-09
Castro::compute_new_dt : limiting dt at level 1
 ... new dt computed: 6.965184638e-07
 ... but limiting to: 3.056624133e-09 = 1.1 * 2.778749212e-09
Now regridding at level lbase = 0
grid_places() time: 0.002378304 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.00672518

Gravity::multilevel_solve_for_new_phi() time = 0.014521609

STEP = 3 TIME = 0.005426077942 : REGRID  with lbase = 0
  Level 1   2 grids  65536 cells  0.9259259259 % of domain
            smallest grid: 32 x 32 x 32  biggest grid: 32 x 32 x 32

...estimated hydro-limited timestep at level 0: 0.000804308035
...hydro-limited CFL timestep constrained at (i,j,k) = (37,49,42)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.000804308035

...estimated hydro-limited timestep at level 1: 6.965184638e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 6.965184638e-07

[Level 0 step 4] ADVANCE at time 0.005426077942 with dt = 3.056624133e-09

  Beginning subcycle 1 starting at time 0.005426077942 with dt = 3.056624133e-09
  Estimated number of subcycles remaining: 1

Castro::construct_old_gravity() time = 0.004747539 on level 0

Castro::do_old_sources() time = 0.003657478 on level 0

Castro::do_old_sources() time = 0.007738175 on level 0

... Entering construct_ctu_hydro_source() on level 0

... Leaving construct_ctu_hydro_source() on level 0

Castro::construct_ctu_hydro_source() time = 0.120345281 on level 0

Castro::construct_old_gravity() time = 0.000326022 on level 1

Castro::do_old_sources() time = 0.000842 on level 1

Castro::do_old_sources() time = 0.002122552 on level 1

... Entering construct_ctu_hydro_source() on level 1

... Leaving construct_ctu_hydro_source() on level 1

Castro::construct_ctu_hydro_source() time = 0.011389111 on level 1

Castro::reflux() at level 0 : time = 0.016651296

... new-time composite Poisson gravity solve from level 0 to level 1

Gravity::fill_multipole_BCs() time = 0.006630697

Gravity::multilevel_solve_for_new_phi() time = 0.023498243

Castro::construct_new_gravity() time = 0.029446345 on level 0

Castro::do_new_sources() time = 0.005043037 on level 0

Castro::construct_new_gravity() time = 0.000368223 on level 1

Castro::do_new_sources() time = 0.001416631 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.038414747

[Level 0 step 4] Advanced 884736 cells
[Level 1 step 4] ADVANCE at time 0.005426077942 with dt = 3.056624133e-09

  Advance at this level has already been completed.

[Level 1 step 4] Advanced 65536 cells

  Updating the rotational period from 30.52761298 s to 30.52761297 s.


[STEP 4] Coarse TimeStep time: 0.270781573
[STEP 4] FAB kilobyte spread across MPI nodes: [2384284 ... 2384284]


STEP = 4 TIME = 0.005426080998 DT = 3.056624133e-09

...estimated hydro-limited timestep at level 0: 0.0002497928903
...hydro-limited CFL timestep constrained at (i,j,k) = (57,41,46)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.0002497928903

...estimated hydro-limited timestep at level 1: 7.255166705e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 7.255166705e-07

Castro::compute_new_dt : limiting dt at level 0
 ... new dt computed: 0.0002497928903
 ... but limiting to: 3.362286546e-09 = 1.1 * 3.056624133e-09
Castro::compute_new_dt : limiting dt at level 1
 ... new dt computed: 7.255166705e-07
 ... but limiting to: 3.362286546e-09 = 1.1 * 3.056624133e-09
Now regridding at level lbase = 0
grid_places() time: 0.002367983 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006715306

Gravity::multilevel_solve_for_new_phi() time = 0.014486634

STEP = 4 TIME = 0.005426080998 : REGRID  with lbase = 0
  Level 1   2 grids  65536 cells  0.9259259259 % of domain
            smallest grid: 32 x 32 x 32  biggest grid: 32 x 32 x 32

...estimated hydro-limited timestep at level 0: 0.0002497928903
...hydro-limited CFL timestep constrained at (i,j,k) = (57,41,46)
Castro::estTimeStep (hydro-limited) at level 0:  estdt = 0.0002497928903

...estimated hydro-limited timestep at level 1: 7.255166705e-07
...hydro-limited CFL timestep constrained at (i,j,k) = (121,90,90)
Castro::estTimeStep (hydro-limited) at level 1:  estdt = 7.255166705e-07

[Level 0 step 5] ADVANCE at time 0.005426080998 with dt = 3.362286546e-09

  Beginning subcycle 1 starting at time 0.005426080998 with dt = 3.362286546e-09
  Estimated number of subcycles remaining: 1

Castro::construct_old_gravity() time = 0.005872145 on level 0

Castro::do_old_sources() time = 0.004025195 on level 0

Castro::do_old_sources() time = 0.006238256 on level 0

... Entering construct_ctu_hydro_source() on level 0

... Leaving construct_ctu_hydro_source() on level 0

Castro::construct_ctu_hydro_source() time = 0.085612759 on level 0

Castro::construct_old_gravity() time = 0.000324437 on level 1

Castro::do_old_sources() time = 0.000855057 on level 1

Castro::do_old_sources() time = 0.001162803 on level 1

... Entering construct_ctu_hydro_source() on level 1

... Leaving construct_ctu_hydro_source() on level 1

Castro::construct_ctu_hydro_source() time = 0.006670894 on level 1

Castro::reflux() at level 0 : time = 0.017030038

... new-time composite Poisson gravity solve from level 0 to level 1

Gravity::fill_multipole_BCs() time = 0.006641241

Gravity::multilevel_solve_for_new_phi() time = 0.023638514

Castro::construct_new_gravity() time = 0.029151878 on level 0

Castro::do_new_sources() time = 0.006873948 on level 0

Castro::construct_new_gravity() time = 0.000367244 on level 1

Castro::do_new_sources() time = 0.0013405 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.907783958

[Level 0 step 5] Advanced 884736 cells
[Level 1 step 5] ADVANCE at time 0.005426080998 with dt = 3.362286546e-09

  Advance at this level has already been completed.

[Level 1 step 5] Advanced 65536 cells

  Updating the rotational period from 30.52761297 s to 30.52761296 s.


[STEP 5] Coarse TimeStep time: 0.230898267
[STEP 5] FAB kilobyte spread across MPI nodes: [2384284 ... 2384284]


STEP = 5 TIME = 0.005426084361 DT = 3.362286546e-09

PLOTFILE: file = wdmerger_3D_plt00005
Write plotfile time = 0.107497266  seconds


Ending run at 07:55:50 UTC on 2026-08-18.
Run time = 2.78091023
Run time without initialization = 1.35927519

  Average number of zones advanced per microsecond: 3.640
  Average number of zones advanced per microsecond per rank: 3.640

CPU(0): Heap Space (bytes) used by Coalescing FAB Arena: 9476456448
Unused ParmParse Variables:
  [TOP]::mg.v(nvals = 1)  :: [2]

Total GPU global memory (MB): 12049
Free  GPU global memory (MB): 2536
[The         Arena] max space allocated (MB): 9037
[The         Arena] max space used      (MB): 3259
[The Managed Arena] max space allocated (MB): 8
[The Managed Arena] max space used      (MB): 0
[The  Pinned Arena] max space allocated (MB): 8
[The  Pinned Arena] max space used      (MB): 6
AMReX (26.08-21-g3b31af42a8b8) finalized