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

Starting run at 07:57:32 UTC on 2026-08-19.
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: 0.002826778 new finest: 0
Now regridding at level lbase = 0
grid_places() time: 0.002314274 new finest: 0
STEP = 0 TIME = 0 : REGRID  with lbase = 0

Gravity::fill_multipole_BCs() time = 0.008523863

Gravity::multilevel_solve_for_new_phi() time = 0.039425467

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 = 0.110623754  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 = 0.004856269 on level 0

Castro::do_old_sources() time = 0.004323561 on level 0

Castro::do_old_sources() time = 0.007693513 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 = 0.083624964 on level 0


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

Gravity::fill_multipole_BCs() time = 0.006380363

Gravity::multilevel_solve_for_new_phi() time = 0.029589603

Castro::construct_new_gravity() time = 0.034432968 on level 0

Castro::do_new_sources() time = 0.00595976 on level 0

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond at this level: 5.292825992

[Level 0 step 1] Advanced 884736 cells

  Updating the rotational period from 30.54368673 s to 30.46017574 s.


[STEP 1] Coarse TimeStep time: 0.175514128
[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: 0.00228357 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006866894

Gravity::multilevel_solve_for_new_phi() time = 0.042566973

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 = 0.004549771 on level 0

Castro::do_old_sources() time = 0.003596644 on level 0

Castro::do_old_sources() time = 0.005821543 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 = 0.124086351 on level 0

Castro::construct_old_gravity() time = 0.000376605 on level 1

Castro::do_old_sources() time = 0.000738502 on level 1

Castro::do_old_sources() time = 0.001150547 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 = 0.010969391 on level 1

Castro::reflux() at level 0 : time = 0.019936145

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

Gravity::fill_multipole_BCs() time = 0.0064917

Gravity::multilevel_solve_for_new_phi() time = 0.030186613

Castro::construct_new_gravity() time = 0.035156605 on level 0

Castro::do_new_sources() time = 0.006706754 on level 0

Castro::construct_new_gravity() time = 0.000431861 on level 1

Castro::do_new_sources() time = 0.002054129 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 3.86070612

[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: 0.309517181
[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: 0.00228448 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006633949

Gravity::multilevel_solve_for_new_phi() time = 0.013674356

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 = 0.003152807 on level 0

Castro::do_old_sources() time = 0.002998292 on level 0

Castro::do_old_sources() time = 0.005109746 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 = 0.118772617 on level 0

Castro::construct_old_gravity() time = 0.000369956 on level 1

Castro::do_old_sources() time = 0.000699753 on level 1

Castro::do_old_sources() time = 0.001174472 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 = 0.010940305 on level 1

Castro::reflux() at level 0 : time = 0.016240681

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

Gravity::fill_multipole_BCs() time = 0.006499459

Gravity::multilevel_solve_for_new_phi() time = 0.022382162

Castro::construct_new_gravity() time = 0.025825483 on level 0

Castro::do_new_sources() time = 0.006729891 on level 0

Castro::construct_new_gravity() time = 0.000378357 on level 1

Castro::do_new_sources() time = 0.001236239 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.298695791

[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: 0.257239576
[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: 0.002106777 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006619545

Gravity::multilevel_solve_for_new_phi() time = 0.013741795

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 = 0.003173564 on level 0

Castro::do_old_sources() time = 0.003065245 on level 0

Castro::do_old_sources() time = 0.005232525 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 = 0.120776205 on level 0

Castro::construct_old_gravity() time = 0.000365571 on level 1

Castro::do_old_sources() time = 0.000752144 on level 1

Castro::do_old_sources() time = 0.001158053 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 = 0.010496486 on level 1

Castro::reflux() at level 0 : time = 0.019149612

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

Gravity::fill_multipole_BCs() time = 0.006517277

Gravity::multilevel_solve_for_new_phi() time = 0.022426253

Castro::construct_new_gravity() time = 0.025655844 on level 0

Castro::do_new_sources() time = 0.004850155 on level 0

Castro::construct_new_gravity() time = 0.00041231 on level 1

Castro::do_new_sources() time = 0.00116971 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.263891308

[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: 0.256829761
[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: 0.002119418 new finest: 1
Castro::numpts_1d at level  1 is 340
Gravity::fill_multipole_BCs() time = 0.006608036

Gravity::multilevel_solve_for_new_phi() time = 0.013911811

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 = 0.00310057 on level 0

Castro::do_old_sources() time = 0.003170804 on level 0

Castro::do_old_sources() time = 0.005069606 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 = 0.095831839 on level 0

Castro::construct_old_gravity() time = 0.000363331 on level 1

Castro::do_old_sources() time = 0.000711603 on level 1

Castro::do_old_sources() time = 0.001086159 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 = 0.010702935 on level 1

Castro::reflux() at level 0 : time = 0.016241312

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

Gravity::fill_multipole_BCs() time = 0.006499998

Gravity::multilevel_solve_for_new_phi() time = 0.022392311

Castro::construct_new_gravity() time = 0.025595774 on level 0

Castro::do_new_sources() time = 0.00478248 on level 0

Castro::construct_new_gravity() time = 0.000425895 on level 1

Castro::do_new_sources() time = 0.001162003 on level 1

  Subcycle completed

  Subcycling complete

  Zones advanced per microsecond from level 0 to level 1: 4.924279956

[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: 0.228530178
[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 = 0.119331789  seconds


Ending run at 07:57:34 UTC on 2026-08-19.
Run time = 2.707408486
Run time without initialization = 1.347713069

  Average number of zones advanced per microsecond: 3.671
  Average number of zones advanced per microsecond per rank: 3.671

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