./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 4fc63b2a
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU --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 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-4fc63b2
[2024-10-31 22:05:44,622 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-10-31 22:05:44,716 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf
[2024-10-31 22:05:44,723 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-10-31 22:05:44,723 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-10-31 22:05:44,750 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-10-31 22:05:44,751 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-10-31 22:05:44,752 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-10-31 22:05:44,753 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-10-31 22:05:44,754 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-10-31 22:05:44,754 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-10-31 22:05:44,755 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-10-31 22:05:44,756 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-10-31 22:05:44,756 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-10-31 22:05:44,758 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-10-31 22:05:44,759 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-10-31 22:05:44,759 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-10-31 22:05:44,760 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-10-31 22:05:44,760 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-10-31 22:05:44,760 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-10-31 22:05:44,760 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-10-31 22:05:44,765 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-10-31 22:05:44,765 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-10-31 22:05:44,765 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-10-31 22:05:44,765 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-10-31 22:05:44,766 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-10-31 22:05:44,766 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-10-31 22:05:44,766 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-10-31 22:05:44,766 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-10-31 22:05:44,767 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-10-31 22:05:44,767 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-10-31 22:05:44,767 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-10-31 22:05:44,767 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 22:05:44,768 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-10-31 22:05:44,768 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-10-31 22:05:44,768 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-10-31 22:05:44,768 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2024-10-31 22:05:44,769 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-10-31 22:05:44,769 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-10-31 22:05:44,769 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-10-31 22:05:44,769 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-10-31 22:05:44,770 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-10-31 22:05:44,770 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU
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 -> 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5
[2024-10-31 22:05:45,051 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-10-31 22:05:45,080 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-10-31 22:05:45,083 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-10-31 22:05:45,085 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-10-31 22:05:45,085 INFO  L274        PluginConnector]: CDTParser initialized
[2024-10-31 22:05:45,087 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c
Unable to find full path for "g++"
[2024-10-31 22:05:47,269 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-10-31 22:05:47,634 INFO  L384              CDTParser]: Found 1 translation units.
[2024-10-31 22:05:47,636 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/sv-benchmarks/c/eca-rers2012/Problem16_label02.c
[2024-10-31 22:05:47,660 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/data/4b59a9fc9/1604115e2bea40f5970e0550e906d486/FLAG32fcf378c
[2024-10-31 22:05:47,681 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/data/4b59a9fc9/1604115e2bea40f5970e0550e906d486
[2024-10-31 22:05:47,684 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-10-31 22:05:47,686 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-10-31 22:05:47,687 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-10-31 22:05:47,688 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-10-31 22:05:47,696 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-10-31 22:05:47,698 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:47" (1/1) ...
[2024-10-31 22:05:47,700 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b25bca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47, skipping insertion in model container
[2024-10-31 22:05:47,700 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:47" (1/1) ...
[2024-10-31 22:05:47,793 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-10-31 22:05:48,073 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/sv-benchmarks/c/eca-rers2012/Problem16_label02.c[6387,6400]
[2024-10-31 22:05:48,641 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 22:05:48,655 INFO  L200         MainTranslator]: Completed pre-run
[2024-10-31 22:05:48,690 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/sv-benchmarks/c/eca-rers2012/Problem16_label02.c[6387,6400]
[2024-10-31 22:05:49,000 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 22:05:49,023 INFO  L204         MainTranslator]: Completed translation
[2024-10-31 22:05:49,024 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49 WrapperNode
[2024-10-31 22:05:49,024 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-10-31 22:05:49,025 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-10-31 22:05:49,026 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-10-31 22:05:49,026 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-10-31 22:05:49,034 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,076 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,215 INFO  L138                Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1770
[2024-10-31 22:05:49,215 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-10-31 22:05:49,216 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-10-31 22:05:49,216 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-10-31 22:05:49,216 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-10-31 22:05:49,228 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,229 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,242 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,372 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].
[2024-10-31 22:05:49,372 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,372 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,442 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,457 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,467 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,481 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,507 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-10-31 22:05:49,509 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-10-31 22:05:49,509 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-10-31 22:05:49,509 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-10-31 22:05:49,510 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (1/1) ...
[2024-10-31 22:05:49,520 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 22:05:49,532 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3
[2024-10-31 22:05:49,547 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-10-31 22:05:49,553 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-10-31 22:05:49,584 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-10-31 22:05:49,585 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2024-10-31 22:05:49,585 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-10-31 22:05:49,585 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-10-31 22:05:49,709 INFO  L238             CfgBuilder]: Building ICFG
[2024-10-31 22:05:49,713 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-10-31 22:05:52,301 INFO  L?                        ?]: Removed 276 outVars from TransFormulas that were not future-live.
[2024-10-31 22:05:52,302 INFO  L287             CfgBuilder]: Performing block encoding
[2024-10-31 22:05:52,334 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-10-31 22:05:52,339 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-10-31 22:05:52,339 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:52 BoogieIcfgContainer
[2024-10-31 22:05:52,339 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-10-31 22:05:52,342 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-10-31 22:05:52,344 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-10-31 22:05:52,347 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-10-31 22:05:52,348 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:05:47" (1/3) ...
[2024-10-31 22:05:52,348 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3158d8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:52, skipping insertion in model container
[2024-10-31 22:05:52,349 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:49" (2/3) ...
[2024-10-31 22:05:52,350 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3158d8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:52, skipping insertion in model container
[2024-10-31 22:05:52,351 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:52" (3/3) ...
[2024-10-31 22:05:52,352 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label02.c
[2024-10-31 22:05:52,374 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-10-31 22:05:52,374 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-10-31 22:05:52,469 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-10-31 22:05:52,477 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;@14791038, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-10-31 22:05:52,478 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-10-31 22:05:52,484 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 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)
[2024-10-31 22:05:52,494 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2024-10-31 22:05:52,494 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:05:52,495 INFO  L215           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]
[2024-10-31 22:05:52,496 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:05:52,501 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:05:52,502 INFO  L85        PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times
[2024-10-31 22:05:52,512 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:05:52,513 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530097127]
[2024-10-31 22:05:52,513 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:05:52,514 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:05:52,678 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:05:52,944 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 22:05:52,947 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:05:52,947 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530097127]
[2024-10-31 22:05:52,948 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530097127] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:05:52,948 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-31 22:05:52,949 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-31 22:05:52,950 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131384057]
[2024-10-31 22:05:52,951 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:05:52,955 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-31 22:05:52,956 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:05:52,989 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-31 22:05:52,990 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:05:52,995 INFO  L87              Difference]: Start difference. First operand  has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 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 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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)
[2024-10-31 22:05:55,875 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:05:55,875 INFO  L93              Difference]: Finished difference Result 1137 states and 2118 transitions.
[2024-10-31 22:05:55,876 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 22:05:55,878 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 61
[2024-10-31 22:05:55,878 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:05:55,896 INFO  L225             Difference]: With dead ends: 1137
[2024-10-31 22:05:55,896 INFO  L226             Difference]: Without dead ends: 662
[2024-10-31 22:05:55,904 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:05:55,908 INFO  L432           NwaCegarLoop]: 106 mSDtfsCounter, 323 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2024-10-31 22:05:55,909 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2024-10-31 22:05:55,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 662 states.
[2024-10-31 22:05:55,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662.
[2024-10-31 22:05:55,986 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 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)
[2024-10-31 22:05:55,989 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions.
[2024-10-31 22:05:55,991 INFO  L78                 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 61
[2024-10-31 22:05:55,991 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:05:55,991 INFO  L471      AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions.
[2024-10-31 22:05:55,992 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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)
[2024-10-31 22:05:55,992 INFO  L276                IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions.
[2024-10-31 22:05:55,995 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 128
[2024-10-31 22:05:55,996 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:05:55,996 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:05:55,996 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-10-31 22:05:55,997 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:05:55,997 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:05:55,998 INFO  L85        PathProgramCache]: Analyzing trace with hash 804089513, now seen corresponding path program 1 times
[2024-10-31 22:05:55,998 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:05:55,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124442437]
[2024-10-31 22:05:55,998 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:05:55,999 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:05:56,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:05:56,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 22:05:56,275 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:05:56,275 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124442437]
[2024-10-31 22:05:56,276 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124442437] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:05:56,276 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-31 22:05:56,276 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-31 22:05:56,277 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140118291]
[2024-10-31 22:05:56,277 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:05:56,278 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-31 22:05:56,279 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:05:56,279 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-31 22:05:56,280 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:05:56,280 INFO  L87              Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand  has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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)
[2024-10-31 22:05:58,168 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:05:58,168 INFO  L93              Difference]: Finished difference Result 1980 states and 3367 transitions.
[2024-10-31 22:05:58,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 22:05:58,169 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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 127
[2024-10-31 22:05:58,170 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:05:58,174 INFO  L225             Difference]: With dead ends: 1980
[2024-10-31 22:05:58,174 INFO  L226             Difference]: Without dead ends: 1320
[2024-10-31 22:05:58,177 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:05:58,178 INFO  L432           NwaCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2024-10-31 22:05:58,179 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2024-10-31 22:05:58,181 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1320 states.
[2024-10-31 22:05:58,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320.
[2024-10-31 22:05:58,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 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)
[2024-10-31 22:05:58,225 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions.
[2024-10-31 22:05:58,226 INFO  L78                 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 127
[2024-10-31 22:05:58,226 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:05:58,226 INFO  L471      AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions.
[2024-10-31 22:05:58,226 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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)
[2024-10-31 22:05:58,227 INFO  L276                IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions.
[2024-10-31 22:05:58,230 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2024-10-31 22:05:58,230 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:05:58,230 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:05:58,231 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-10-31 22:05:58,231 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:05:58,232 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:05:58,232 INFO  L85        PathProgramCache]: Analyzing trace with hash 601628073, now seen corresponding path program 1 times
[2024-10-31 22:05:58,232 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:05:58,232 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485785424]
[2024-10-31 22:05:58,233 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:05:58,233 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:05:58,289 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:05:58,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 22:05:58,444 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:05:58,445 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485785424]
[2024-10-31 22:05:58,445 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485785424] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:05:58,445 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-31 22:05:58,445 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-31 22:05:58,445 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742704469]
[2024-10-31 22:05:58,446 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:05:58,447 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-31 22:05:58,448 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:05:58,449 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-31 22:05:58,449 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:05:58,450 INFO  L87              Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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)
[2024-10-31 22:06:00,412 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:06:00,412 INFO  L93              Difference]: Finished difference Result 3296 states and 5285 transitions.
[2024-10-31 22:06:00,413 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 22:06:00,414 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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 128
[2024-10-31 22:06:00,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:06:00,422 INFO  L225             Difference]: With dead ends: 3296
[2024-10-31 22:06:00,422 INFO  L226             Difference]: Without dead ends: 1978
[2024-10-31 22:06:00,425 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:06:00,426 INFO  L432           NwaCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2024-10-31 22:06:00,430 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2024-10-31 22:06:00,433 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1978 states.
[2024-10-31 22:06:00,469 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978.
[2024-10-31 22:06:00,473 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 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)
[2024-10-31 22:06:00,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions.
[2024-10-31 22:06:00,480 INFO  L78                 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 128
[2024-10-31 22:06:00,481 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:06:00,482 INFO  L471      AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions.
[2024-10-31 22:06:00,483 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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)
[2024-10-31 22:06:00,483 INFO  L276                IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions.
[2024-10-31 22:06:00,495 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 221
[2024-10-31 22:06:00,496 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:06:00,496 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:06:00,496 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-10-31 22:06:00,497 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:06:00,497 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:06:00,501 INFO  L85        PathProgramCache]: Analyzing trace with hash 1357591119, now seen corresponding path program 1 times
[2024-10-31 22:06:00,501 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:06:00,501 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906568522]
[2024-10-31 22:06:00,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:00,501 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:06:00,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:00,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 22:06:00,947 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:06:00,947 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906568522]
[2024-10-31 22:06:00,947 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906568522] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:06:00,947 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-31 22:06:00,948 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-31 22:06:00,948 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179257167]
[2024-10-31 22:06:00,948 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:06:00,951 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-31 22:06:00,952 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:06:00,953 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-31 22:06:00,954 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:06:00,954 INFO  L87              Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand  has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 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)
[2024-10-31 22:06:02,853 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:06:02,854 INFO  L93              Difference]: Finished difference Result 5928 states and 7897 transitions.
[2024-10-31 22:06:02,854 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 22:06:02,854 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 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 220
[2024-10-31 22:06:02,855 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:06:02,867 INFO  L225             Difference]: With dead ends: 5928
[2024-10-31 22:06:02,868 INFO  L226             Difference]: Without dead ends: 3952
[2024-10-31 22:06:02,871 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-31 22:06:02,872 INFO  L432           NwaCegarLoop]: 253 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2024-10-31 22:06:02,873 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 257 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2024-10-31 22:06:02,878 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3952 states.
[2024-10-31 22:06:02,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952.
[2024-10-31 22:06:02,990 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3952 states, 3951 states have (on average 1.2171602126044039) internal successors, (4809), 3951 states have internal predecessors, (4809), 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)
[2024-10-31 22:06:03,000 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4809 transitions.
[2024-10-31 22:06:03,000 INFO  L78                 Accepts]: Start accepts. Automaton has 3952 states and 4809 transitions. Word has length 220
[2024-10-31 22:06:03,001 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:06:03,001 INFO  L471      AbstractCegarLoop]: Abstraction has 3952 states and 4809 transitions.
[2024-10-31 22:06:03,002 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 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)
[2024-10-31 22:06:03,002 INFO  L276                IsEmpty]: Start isEmpty. Operand 3952 states and 4809 transitions.
[2024-10-31 22:06:03,006 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 305
[2024-10-31 22:06:03,006 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:06:03,007 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:06:03,007 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2024-10-31 22:06:03,007 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:06:03,008 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:06:03,008 INFO  L85        PathProgramCache]: Analyzing trace with hash -1544183199, now seen corresponding path program 1 times
[2024-10-31 22:06:03,008 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:06:03,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110198033]
[2024-10-31 22:06:03,009 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:03,009 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:06:03,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:03,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 22:06:03,512 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:06:03,512 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110198033]
[2024-10-31 22:06:03,513 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110198033] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-31 22:06:03,514 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385701262]
[2024-10-31 22:06:03,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:03,514 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 22:06:03,514 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3
[2024-10-31 22:06:03,517 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-31 22:06:03,520 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-10-31 22:06:03,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:03,728 INFO  L255         TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjuncts are in the unsatisfiable core
[2024-10-31 22:06:03,742 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 22:06:04,313 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked.
[2024-10-31 22:06:04,313 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-10-31 22:06:04,313 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [385701262] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:06:04,313 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-10-31 22:06:04,314 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2024-10-31 22:06:04,314 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531115274]
[2024-10-31 22:06:04,314 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:06:04,315 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-31 22:06:04,315 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:06:04,316 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-31 22:06:04,316 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2024-10-31 22:06:04,317 INFO  L87              Difference]: Start difference. First operand 3952 states and 4809 transitions. Second operand  has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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)
[2024-10-31 22:06:05,715 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:06:05,716 INFO  L93              Difference]: Finished difference Result 5270 states and 6254 transitions.
[2024-10-31 22:06:05,716 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 22:06:05,717 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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 304
[2024-10-31 22:06:05,718 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:06:05,734 INFO  L225             Difference]: With dead ends: 5270
[2024-10-31 22:06:05,734 INFO  L226             Difference]: Without dead ends: 5268
[2024-10-31 22:06:05,736 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2024-10-31 22:06:05,736 INFO  L432           NwaCegarLoop]: 153 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2024-10-31 22:06:05,739 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2024-10-31 22:06:05,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5268 states.
[2024-10-31 22:06:05,849 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610.
[2024-10-31 22:06:05,857 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4610 states, 4609 states have (on average 1.2013451941852897) internal successors, (5537), 4609 states have internal predecessors, (5537), 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)
[2024-10-31 22:06:05,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5537 transitions.
[2024-10-31 22:06:05,866 INFO  L78                 Accepts]: Start accepts. Automaton has 4610 states and 5537 transitions. Word has length 304
[2024-10-31 22:06:05,867 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:06:05,867 INFO  L471      AbstractCegarLoop]: Abstraction has 4610 states and 5537 transitions.
[2024-10-31 22:06:05,868 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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)
[2024-10-31 22:06:05,868 INFO  L276                IsEmpty]: Start isEmpty. Operand 4610 states and 5537 transitions.
[2024-10-31 22:06:05,876 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 414
[2024-10-31 22:06:05,877 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:06:05,877 INFO  L215           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:06:05,899 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-10-31 22:06:06,078 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 22:06:06,079 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:06:06,080 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:06:06,080 INFO  L85        PathProgramCache]: Analyzing trace with hash -2079847568, now seen corresponding path program 1 times
[2024-10-31 22:06:06,081 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:06:06,081 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027309795]
[2024-10-31 22:06:06,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:06,081 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:06:06,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:07,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 223 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked.
[2024-10-31 22:06:07,145 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:06:07,145 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027309795]
[2024-10-31 22:06:07,146 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027309795] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-31 22:06:07,146 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-31 22:06:07,148 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-10-31 22:06:07,149 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946632787]
[2024-10-31 22:06:07,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-31 22:06:07,149 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-10-31 22:06:07,150 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-31 22:06:07,150 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-10-31 22:06:07,150 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-10-31 22:06:07,151 INFO  L87              Difference]: Start difference. First operand 4610 states and 5537 transitions. Second operand  has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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)
[2024-10-31 22:06:09,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 22:06:09,128 INFO  L93              Difference]: Finished difference Result 9547 states and 11413 transitions.
[2024-10-31 22:06:09,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-10-31 22:06:09,133 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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 413
[2024-10-31 22:06:09,133 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 22:06:09,155 INFO  L225             Difference]: With dead ends: 9547
[2024-10-31 22:06:09,156 INFO  L226             Difference]: Without dead ends: 4939
[2024-10-31 22:06:09,160 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2024-10-31 22:06:09,162 INFO  L432           NwaCegarLoop]: 267 mSDtfsCounter, 127 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2024-10-31 22:06:09,163 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 322 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2024-10-31 22:06:09,169 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4939 states.
[2024-10-31 22:06:09,242 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4939.
[2024-10-31 22:06:09,249 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4939 states, 4938 states have (on average 1.1891454029971649) internal successors, (5872), 4938 states have internal predecessors, (5872), 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)
[2024-10-31 22:06:09,259 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5872 transitions.
[2024-10-31 22:06:09,260 INFO  L78                 Accepts]: Start accepts. Automaton has 4939 states and 5872 transitions. Word has length 413
[2024-10-31 22:06:09,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 22:06:09,260 INFO  L471      AbstractCegarLoop]: Abstraction has 4939 states and 5872 transitions.
[2024-10-31 22:06:09,261 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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)
[2024-10-31 22:06:09,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 4939 states and 5872 transitions.
[2024-10-31 22:06:09,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 476
[2024-10-31 22:06:09,272 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 22:06:09,272 INFO  L215           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 22:06:09,272 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2024-10-31 22:06:09,273 INFO  L396      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 22:06:09,273 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 22:06:09,273 INFO  L85        PathProgramCache]: Analyzing trace with hash -832462339, now seen corresponding path program 1 times
[2024-10-31 22:06:09,274 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-31 22:06:09,274 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506718757]
[2024-10-31 22:06:09,274 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:09,274 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-31 22:06:09,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:10,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked.
[2024-10-31 22:06:10,389 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-31 22:06:10,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506718757]
[2024-10-31 22:06:10,389 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506718757] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-31 22:06:10,390 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910404300]
[2024-10-31 22:06:10,391 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 22:06:10,392 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 22:06:10,392 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3
[2024-10-31 22:06:10,394 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-31 22:06:10,396 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f17bc5ff-101b-4a34-b4a5-62cbeca33b4c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-10-31 22:06:10,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 22:06:10,616 INFO  L255         TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjuncts are in the unsatisfiable core
[2024-10-31 22:06:10,623 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 22:06:11,521 INFO  L134       CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked.
[2024-10-31 22:06:11,521 INFO  L311         TraceCheckSpWp]: Computing backward predicates...