./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem07_label05.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 8fc3dc66
Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem07_label05.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60c747697125130214666fa58f70bda4df6a10242c6c79f26cb54e981254217b
--- Real Ultimate output ---
This is Ultimate 0.3.0-?-8fc3dc6-m
[2025-03-16 14:30:56,590 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-03-16 14:30:56,648 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2025-03-16 14:30:56,651 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-03-16 14:30:56,651 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-03-16 14:30:56,667 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-03-16 14:30:56,669 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-03-16 14:30:56,669 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-03-16 14:30:56,669 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2025-03-16 14:30:56,669 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2025-03-16 14:30:56,670 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-03-16 14:30:56,670 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-03-16 14:30:56,670 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-03-16 14:30:56,670 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-03-16 14:30:56,671 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * sizeof long=4
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2025-03-16 14:30:56,671 INFO  L153        SettingsManager]:  * sizeof long double=12
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2025-03-16 14:30:56,672 INFO  L151        SettingsManager]: Preferences of IcfgBuilder differ from their defaults:
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2025-03-16 14:30:56,672 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Compute procedure contracts=false
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-03-16 14:30:56,672 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2025-03-16 14:30:56,673 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-03-16 14:30:56,673 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2025-03-16 14:30:56,673 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-03-16 14:30:56,673 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c747697125130214666fa58f70bda4df6a10242c6c79f26cb54e981254217b
[2025-03-16 14:30:56,877 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-03-16 14:30:56,883 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-03-16 14:30:56,884 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-03-16 14:30:56,885 INFO  L270        PluginConnector]: Initializing CDTParser...
[2025-03-16 14:30:56,885 INFO  L274        PluginConnector]: CDTParser initialized
[2025-03-16 14:30:56,890 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem07_label05.c
[2025-03-16 14:30:58,029 INFO  L533              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ab6ade3/36cff6d4fb96471992356423111604e3/FLAG15f149f55
[2025-03-16 14:30:59,140 INFO  L384              CDTParser]: Found 1 translation units.
[2025-03-16 14:30:59,141 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem07_label05.c
[2025-03-16 14:30:59,248 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ab6ade3/36cff6d4fb96471992356423111604e3/FLAG15f149f55
[2025-03-16 14:30:59,613 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ab6ade3/36cff6d4fb96471992356423111604e3
[2025-03-16 14:30:59,614 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-03-16 14:30:59,615 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2025-03-16 14:30:59,616 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2025-03-16 14:30:59,617 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2025-03-16 14:30:59,620 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2025-03-16 14:30:59,621 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:30:59" (1/1) ...
[2025-03-16 14:30:59,621 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f67b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:30:59, skipping insertion in model container
[2025-03-16 14:30:59,621 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:30:59" (1/1) ...
[2025-03-16 14:31:00,086 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2025-03-16 14:31:06,016 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem07_label05.c[2767111,2767124]
[2025-03-16 14:31:06,063 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2025-03-16 14:31:06,069 INFO  L200         MainTranslator]: Completed pre-run
[2025-03-16 14:31:09,573 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem07_label05.c[2767111,2767124]
[2025-03-16 14:31:09,581 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2025-03-16 14:31:10,346 INFO  L204         MainTranslator]: Completed translation
[2025-03-16 14:31:10,347 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10 WrapperNode
[2025-03-16 14:31:10,348 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2025-03-16 14:31:10,349 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2025-03-16 14:31:10,349 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2025-03-16 14:31:10,349 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2025-03-16 14:31:10,362 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:11,034 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:12,607 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83816
[2025-03-16 14:31:12,608 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2025-03-16 14:31:12,608 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-03-16 14:31:12,608 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-03-16 14:31:12,608 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-03-16 14:31:12,615 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:12,615 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:13,001 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:13,224 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2025-03-16 14:31:13,224 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:13,224 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:13,965 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:14,031 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:14,103 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:14,157 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:14,370 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-03-16 14:31:14,371 INFO  L112        PluginConnector]: ------------------------IcfgBuilder----------------------------
[2025-03-16 14:31:14,371 INFO  L270        PluginConnector]: Initializing IcfgBuilder...
[2025-03-16 14:31:14,371 INFO  L274        PluginConnector]: IcfgBuilder initialized
[2025-03-16 14:31:14,372 INFO  L184        PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (1/1) ...
[2025-03-16 14:31:14,376 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2025-03-16 14:31:14,385 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2025-03-16 14:31:14,397 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2025-03-16 14:31:14,402 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2025-03-16 14:31:14,415 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2025-03-16 14:31:14,415 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2025-03-16 14:31:14,415 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2025-03-16 14:31:14,415 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2025-03-16 14:31:14,520 INFO  L256             CfgBuilder]: Building ICFG
[2025-03-16 14:31:14,521 INFO  L286             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-03-16 14:31:43,556 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L27467: havoc calculate_output17_#t~ret67#1;
[2025-03-16 14:31:43,556 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L30640: havoc calculate_output19_#t~ret69#1;
[2025-03-16 14:31:43,556 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L33854: havoc calculate_output21_#t~ret71#1;
[2025-03-16 14:31:43,556 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L37043: havoc calculate_output23_#t~ret73#1;
[2025-03-16 14:31:43,557 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L40256: havoc calculate_output25_#t~ret75#1;
[2025-03-16 14:31:43,557 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L43471: havoc calculate_output27_#t~ret77#1;
[2025-03-16 14:31:43,557 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L3372: havoc calculate_output2_#t~ret52#1;
[2025-03-16 14:31:43,557 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L6563: havoc calculate_output4_#t~ret54#1;
[2025-03-16 14:31:43,557 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L49913: havoc calculate_output31_#t~ret81#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L46748: havoc calculate_output29_#t~ret79#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L53127: havoc calculate_output33_#t~ret83#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L9794: havoc calculate_output6_#t~ret56#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L12979: havoc calculate_output8_#t~ret58#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L56318: havoc calculate_output35_#t~ret85#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L59517: havoc calculate_output37_#t~ret87#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L69030: havoc calculate_output43_#t~ret93#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L72221: havoc calculate_output45_#t~ret95#1;
[2025-03-16 14:31:43,558 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L65884: havoc calculate_output41_#t~ret91#1;
[2025-03-16 14:31:43,559 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L62714: havoc calculate_output39_#t~ret89#1;
[2025-03-16 14:31:43,559 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L16222: havoc calculate_output10_#t~ret60#1;
[2025-03-16 14:31:43,559 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L19405: havoc calculate_output12_#t~ret62#1;
[2025-03-16 14:31:43,559 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L22614: havoc calculate_output14_#t~ret64#1;
[2025-03-16 14:31:43,559 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L25853: havoc calculate_output16_#t~ret66#1;
[2025-03-16 14:31:43,560 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L29057: havoc calculate_output18_#t~ret68#1;
[2025-03-16 14:31:43,560 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L32235: havoc calculate_output20_#t~ret70#1;
[2025-03-16 14:31:43,560 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L35476: havoc calculate_output22_#t~ret72#1;
[2025-03-16 14:31:43,560 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L38653: havoc calculate_output24_#t~ret74#1;
[2025-03-16 14:31:43,560 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L41837: havoc calculate_output26_#t~ret76#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L1749: havoc calculate_output_#t~ret51#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L45097: havoc calculate_output28_#t~ret78#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L4964: havoc calculate_output3_#t~ret53#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L48330: havoc calculate_output30_#t~ret80#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L8188: havoc calculate_output5_#t~ret55#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L51530: havoc calculate_output32_#t~ret82#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L54714: havoc calculate_output34_#t~ret84#1;
[2025-03-16 14:31:43,561 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L11383: havoc calculate_output7_#t~ret57#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L57918: havoc calculate_output36_#t~ret86#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L70609: havoc calculate_output44_#t~ret94#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L14598: havoc calculate_output9_#t~ret59#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L67453: havoc calculate_output42_#t~ret92#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L61118: havoc calculate_output38_#t~ret88#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L17804: havoc calculate_output11_#t~ret61#1;
[2025-03-16 14:31:43,562 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L64314: havoc calculate_output40_#t~ret90#1;
[2025-03-16 14:31:43,563 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L21037: havoc calculate_output13_#t~ret63#1;
[2025-03-16 14:31:43,563 INFO  L1322  $ProcedureCfgBuilder]: dead code at ProgramPoint L24228: havoc calculate_output15_#t~ret65#1;
[2025-03-16 14:31:44,698 INFO  L?                        ?]: Removed 10224 outVars from TransFormulas that were not future-live.
[2025-03-16 14:31:44,698 INFO  L307             CfgBuilder]: Performing block encoding
[2025-03-16 14:31:44,804 INFO  L331             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2025-03-16 14:31:44,804 INFO  L336             CfgBuilder]: Removed 0 assume(true) statements.
[2025-03-16 14:31:44,804 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:31:44 BoogieIcfgContainer
[2025-03-16 14:31:44,804 INFO  L131        PluginConnector]: ------------------------ END IcfgBuilder----------------------------
[2025-03-16 14:31:44,806 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-03-16 14:31:44,806 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-03-16 14:31:44,809 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-03-16 14:31:44,809 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:30:59" (1/3) ...
[2025-03-16 14:31:44,810 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d7bca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:31:44, skipping insertion in model container
[2025-03-16 14:31:44,810 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:31:10" (2/3) ...
[2025-03-16 14:31:44,810 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d7bca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:31:44, skipping insertion in model container
[2025-03-16 14:31:44,810 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:31:44" (3/3) ...
[2025-03-16 14:31:44,811 INFO  L128   eAbstractionObserver]: Analyzing ICFG Problem07_label05.c
[2025-03-16 14:31:44,821 INFO  L216   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-03-16 14:31:44,824 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG Problem07_label05.c that has 1 procedures, 10196 locations, 1 initial locations, 1 loop locations, and 1 error locations.
[2025-03-16 14:31:44,975 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-03-16 14:31:44,983 INFO  L333      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3462a67b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-03-16 14:31:44,984 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-03-16 14:31:45,012 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10196 states, 10194 states have (on average 1.995095154012164) internal successors, (20338), 10195 states have internal predecessors, (20338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-03-16 14:31:45,448 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10088
[2025-03-16 14:31:45,448 INFO  L210           NwaCegarLoop]: Found error trace
[2025-03-16 14:31:45,452 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2025-03-16 14:31:45,453 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2025-03-16 14:31:45,460 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2025-03-16 14:31:45,462 INFO  L85        PathProgramCache]: Analyzing trace with hash 649892255, now seen corresponding path program 1 times
[2025-03-16 14:31:45,468 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-03-16 14:31:45,469 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082535765]
[2025-03-16 14:31:45,471 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-03-16 14:31:45,471 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-03-16 14:31:46,410 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10087 statements into 1 equivalence classes.
[2025-03-16 14:31:47,318 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10087 of 10087 statements.
[2025-03-16 14:31:47,318 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-03-16 14:31:47,319 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-03-16 14:31:59,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-03-16 14:31:59,827 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-03-16 14:31:59,828 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082535765]
[2025-03-16 14:31:59,828 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082535765] provided 1 perfect and 0 imperfect interpolant sequences
[2025-03-16 14:31:59,828 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-03-16 14:31:59,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2025-03-16 14:31:59,830 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748213304]
[2025-03-16 14:31:59,830 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-03-16 14:31:59,839 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2025-03-16 14:31:59,840 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-03-16 14:31:59,858 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2025-03-16 14:31:59,858 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-03-16 14:31:59,885 INFO  L87              Difference]: Start difference. First operand  has 10196 states, 10194 states have (on average 1.995095154012164) internal successors, (20338), 10195 states have internal predecessors, (20338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 5043.5) internal successors, (10087), 2 states have internal predecessors, (10087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-03-16 14:32:00,124 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-03-16 14:32:00,125 INFO  L93              Difference]: Finished difference Result 20391 states and 40675 transitions.
[2025-03-16 14:32:00,126 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2025-03-16 14:32:00,134 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5043.5) internal successors, (10087), 2 states have internal predecessors, (10087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10087
[2025-03-16 14:32:00,152 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2025-03-16 14:32:00,207 INFO  L225             Difference]: With dead ends: 20391
[2025-03-16 14:32:00,208 INFO  L226             Difference]: Without dead ends: 10193
[2025-03-16 14:32:00,228 INFO  L434           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-03-16 14:32:00,230 INFO  L435           NwaCegarLoop]: 20276 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20276 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-03-16 14:32:00,231 INFO  L436           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20276 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-03-16 14:32:00,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10193 states.
[2025-03-16 14:32:00,448 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 10193.
[2025-03-16 14:32:00,472 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10193 states, 10192 states have (on average 1.9891091051805339) internal successors, (20273), 10192 states have internal predecessors, (20273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-03-16 14:32:00,497 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10193 states to 10193 states and 20273 transitions.
[2025-03-16 14:32:00,501 INFO  L78                 Accepts]: Start accepts. Automaton has 10193 states and 20273 transitions. Word has length 10087
[2025-03-16 14:32:00,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2025-03-16 14:32:00,514 INFO  L471      AbstractCegarLoop]: Abstraction has 10193 states and 20273 transitions.
[2025-03-16 14:32:00,516 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5043.5) internal successors, (10087), 2 states have internal predecessors, (10087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-03-16 14:32:00,516 INFO  L276                IsEmpty]: Start isEmpty. Operand 10193 states and 20273 transitions.
[2025-03-16 14:32:01,024 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10088
[2025-03-16 14:32:01,024 INFO  L210           NwaCegarLoop]: Found error trace
[2025-03-16 14:32:01,027 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2025-03-16 14:32:01,028 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2025-03-16 14:32:01,028 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2025-03-16 14:32:01,030 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2025-03-16 14:32:01,033 INFO  L85        PathProgramCache]: Analyzing trace with hash 649923007, now seen corresponding path program 1 times
[2025-03-16 14:32:01,033 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-03-16 14:32:01,033 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251631255]
[2025-03-16 14:32:01,035 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-03-16 14:32:01,035 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms