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TLC2 Version 2.16 of 31 December 2020 (rev: cdddf55)
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Running breadth-first search Model-Checking with fp 88 and seed -5954573519878498570 with 4 workers on 8 cores with 1193MB heap and 2683MB offheap memory [pid: 14140] (Windows 10 10.0 amd64, AdoptOpenJDK 14.0.1 x86_64, OffHeapDiskFPSet, DiskStateQueue).
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Starting SANY...
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Parsing file C:\lamport\books\fred\book-specs\Sqrs.toolbox\Model_1\MC.tla
Parsing file C:\lamport\books\fred\book-specs\Sqrs.toolbox\Model_1\Sqrs.tla
Parsing file C:\lamport\mytemp\toolbox\TLAToolbox-1.7.0-win32.win32.x86_64\toolbox\plugins\org.lamport.tlatools_1.0.0.202012311918\tla2sany\StandardModules\TLC.tla
Parsing file C:\lamport\mytemp\toolbox\TLAToolbox-1.7.0-win32.win32.x86_64\toolbox\plugins\org.lamport.tlatools_1.0.0.202012311918\tla2sany\StandardModules\Integers.tla
Parsing file C:\lamport\mytemp\toolbox\TLAToolbox-1.7.0-win32.win32.x86_64\toolbox\plugins\org.lamport.tlatools_1.0.0.202012311918\tla2sany\StandardModules\Naturals.tla
Parsing file C:\lamport\mytemp\toolbox\TLAToolbox-1.7.0-win32.win32.x86_64\toolbox\plugins\org.lamport.tlatools_1.0.0.202012311918\tla2sany\StandardModules\Sequences.tla
Parsing file C:\cygwin\usr\local\lib\tlaps\FiniteSets.tla
Semantic processing of module Naturals
Semantic processing of module Integers
Semantic processing of module Sqrs
Semantic processing of module Sequences
Semantic processing of module FiniteSets
Semantic processing of module TLC
Semantic processing of module MC
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SANY finished.
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Starting... (2024-10-06 15:38:23)
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Computing initial states...
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Finished computing initial states: 1 distinct state generated at 2024-10-06 15:38:25.
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Model checking completed. No error has been found.
  Estimates of the probability that TLC did not check all reachable states
  because two distinct states had the same fingerprint:
  calculated (optimistic):  val = 5.4E-19
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The coverage statistics at 2024-10-06 15:38:25
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<Init line 28, col 1 to line 28, col 4 of module Sqrs>: 1:1
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  line 29, col 9 to line 30, col 16 of module Sqrs: 1
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<Next line 32, col 1 to line 32, col 4 of module Sqrs>: 9:10
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  line 32, col 9 to line 33, col 21 of module Sqrs: 10
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<Inv line 42, col 1 to line 42, col 3 of module Sqrs>
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  line 42, col 8 to line 44, col 30 of module Sqrs: 11
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End of statistics.
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Progress(10) at 2024-10-06 15:38:25: 11 states generated (156 s/min), 10 distinct states found (141 ds/min), 0 states left on queue.
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11 states generated, 10 distinct states found, 0 states left on queue.
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The depth of the complete state graph search is 10.
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The average outdegree of the complete state graph is 1 (minimum is 0, the maximum 1 and the 95th percentile is 1).
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Finished in 4260ms at (2024-10-06 15:38:25)
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