./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash e5cb0b20c1a26861a3db01218fa43270af338003916050f588b6325bf53e3193
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 23:09:43,707 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 23:09:43,823 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 23:09:43,833 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 23:09:43,833 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 23:09:43,872 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 23:09:43,872 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 23:09:43,873 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 23:09:43,875 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 23:09:43,880 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 23:09:43,881 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 23:09:43,882 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 23:09:43,882 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 23:09:43,884 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 23:09:43,885 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 23:09:43,885 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 23:09:43,885 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 23:09:43,886 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 23:09:43,886 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 23:09:43,887 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 23:09:43,887 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 23:09:43,888 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 23:09:43,889 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 23:09:43,889 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 23:09:43,890 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 23:09:43,890 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:09:43,891 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 23:09:43,891 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 23:09:43,891 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 23:09:43,892 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 23:09:43,893 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 23:09:43,893 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 23:09:43,894 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 23:09:43,894 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 23:09:43,894 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 23:09:43,895 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 23:09:43,895 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_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/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_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
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 -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5cb0b20c1a26861a3db01218fa43270af338003916050f588b6325bf53e3193
[2023-11-06 23:09:44,212 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 23:09:44,245 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 23:09:44,247 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 23:09:44,249 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 23:09:44,250 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 23:09:44,251 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c
[2023-11-06 23:09:47,268 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 23:09:47,788 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 23:09:47,788 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c
[2023-11-06 23:09:47,817 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/data/1d4cb6ef2/e49d828f4e78403ebcea8740d1798935/FLAG720f8096d
[2023-11-06 23:09:47,832 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/data/1d4cb6ef2/e49d828f4e78403ebcea8740d1798935
[2023-11-06 23:09:47,835 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 23:09:47,836 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 23:09:47,838 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 23:09:47,838 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 23:09:47,844 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 23:09:47,847 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:47" (1/1) ...
[2023-11-06 23:09:47,848 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a8d0be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:47, skipping insertion in model container
[2023-11-06 23:09:47,849 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:47" (1/1) ...
[2023-11-06 23:09:47,968 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 23:09:48,209 WARN  L240   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_476966a8-d274-4eae-8c1b-b64137ed476b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c[1181,1194]
[2023-11-06 23:09:49,048 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:09:49,060 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 23:09:49,076 WARN  L240   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_476966a8-d274-4eae-8c1b-b64137ed476b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c[1181,1194]
[2023-11-06 23:09:49,442 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:09:49,458 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 23:09:49,459 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49 WrapperNode
[2023-11-06 23:09:49,459 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 23:09:49,461 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 23:09:49,461 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 23:09:49,461 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 23:09:49,469 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:49,598 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:51,411 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 16878
[2023-11-06 23:09:51,416 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 23:09:51,417 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 23:09:51,418 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 23:09:51,419 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 23:09:51,429 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:51,431 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:52,039 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:52,039 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:52,599 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:52,714 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:52,964 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:53,019 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:53,369 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 23:09:53,371 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 23:09:53,371 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 23:09:53,372 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 23:09:53,372 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (1/1) ...
[2023-11-06 23:09:53,382 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:09:53,408 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:09:53,438 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 23:09:53,496 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 23:09:53,533 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 23:09:53,534 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 23:09:53,548 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 23:09:53,548 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 23:09:54,686 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 23:09:54,688 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 23:10:05,963 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 23:10:05,997 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 23:10:05,997 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 23:10:06,003 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:06 BoogieIcfgContainer
[2023-11-06 23:10:06,003 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 23:10:06,006 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 23:10:06,006 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 23:10:06,010 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 23:10:06,010 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:47" (1/3) ...
[2023-11-06 23:10:06,011 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f419500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:06, skipping insertion in model container
[2023-11-06 23:10:06,011 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:49" (2/3) ...
[2023-11-06 23:10:06,011 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f419500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:06, skipping insertion in model container
[2023-11-06 23:10:06,012 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:06" (3/3) ...
[2023-11-06 23:10:06,013 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.driving_phils.5.prop1-back-serstep.c
[2023-11-06 23:10:06,033 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 23:10:06,033 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 23:10:06,157 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 23:10:06,164 INFO  L357      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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fe661dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 23:10:06,164 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 23:10:06,181 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 3997 states, 3995 states have (on average 1.674342928660826) internal successors, (6689), 3996 states have internal predecessors, (6689), 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)
[2023-11-06 23:10:06,208 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 416
[2023-11-06 23:10:06,208 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:06,210 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:06,210 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:06,215 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:06,216 INFO  L85        PathProgramCache]: Analyzing trace with hash 271026470, now seen corresponding path program 1 times
[2023-11-06 23:10:06,225 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:06,226 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470206363]
[2023-11-06 23:10:06,226 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:06,227 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:06,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:09,152 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:09,152 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:09,153 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470206363]
[2023-11-06 23:10:09,153 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470206363] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:09,154 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:09,154 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:09,156 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893237391]
[2023-11-06 23:10:09,157 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:09,166 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:09,167 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:09,214 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:09,216 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:09,228 INFO  L87              Difference]: Start difference. First operand  has 3997 states, 3995 states have (on average 1.674342928660826) internal successors, (6689), 3996 states have internal predecessors, (6689), 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 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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)
[2023-11-06 23:10:09,615 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:09,615 INFO  L93              Difference]: Finished difference Result 7834 states and 13116 transitions.
[2023-11-06 23:10:09,617 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:09,619 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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 415
[2023-11-06 23:10:09,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:09,668 INFO  L225             Difference]: With dead ends: 7834
[2023-11-06 23:10:09,668 INFO  L226             Difference]: Without dead ends: 3995
[2023-11-06 23:10:09,683 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:09,688 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 1 mSDsluCounter, 13356 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20037 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:09,689 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20037 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:09,719 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3995 states.
[2023-11-06 23:10:09,863 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3995.
[2023-11-06 23:10:09,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3995 states, 3994 states have (on average 1.673760640961442) internal successors, (6685), 3994 states have internal predecessors, (6685), 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)
[2023-11-06 23:10:09,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 6685 transitions.
[2023-11-06 23:10:09,899 INFO  L78                 Accepts]: Start accepts. Automaton has 3995 states and 6685 transitions. Word has length 415
[2023-11-06 23:10:09,902 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:09,903 INFO  L495      AbstractCegarLoop]: Abstraction has 3995 states and 6685 transitions.
[2023-11-06 23:10:09,903 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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)
[2023-11-06 23:10:09,904 INFO  L276                IsEmpty]: Start isEmpty. Operand 3995 states and 6685 transitions.
[2023-11-06 23:10:09,917 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 417
[2023-11-06 23:10:09,918 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:09,919 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:09,919 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 23:10:09,919 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:09,920 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:09,920 INFO  L85        PathProgramCache]: Analyzing trace with hash -186386614, now seen corresponding path program 1 times
[2023-11-06 23:10:09,921 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:09,921 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047342090]
[2023-11-06 23:10:09,921 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:09,921 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:10,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:11,401 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:11,401 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:11,402 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047342090]
[2023-11-06 23:10:11,403 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047342090] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:11,403 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:11,403 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:11,404 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091379637]
[2023-11-06 23:10:11,404 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:11,407 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:11,407 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:11,409 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:11,409 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:11,410 INFO  L87              Difference]: Start difference. First operand 3995 states and 6685 transitions. Second operand  has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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)
[2023-11-06 23:10:11,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:11,699 INFO  L93              Difference]: Finished difference Result 7835 states and 13112 transitions.
[2023-11-06 23:10:11,699 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:11,700 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 416
[2023-11-06 23:10:11,701 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:11,723 INFO  L225             Difference]: With dead ends: 7835
[2023-11-06 23:10:11,724 INFO  L226             Difference]: Without dead ends: 3998
[2023-11-06 23:10:11,736 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:11,739 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 1 mSDsluCounter, 13353 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20034 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:11,740 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20034 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:11,752 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3998 states.
[2023-11-06 23:10:11,831 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3997.
[2023-11-06 23:10:11,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3997 states, 3996 states have (on average 1.6734234234234233) internal successors, (6687), 3996 states have internal predecessors, (6687), 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)
[2023-11-06 23:10:11,861 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6687 transitions.
[2023-11-06 23:10:11,861 INFO  L78                 Accepts]: Start accepts. Automaton has 3997 states and 6687 transitions. Word has length 416
[2023-11-06 23:10:11,862 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:11,862 INFO  L495      AbstractCegarLoop]: Abstraction has 3997 states and 6687 transitions.
[2023-11-06 23:10:11,863 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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)
[2023-11-06 23:10:11,863 INFO  L276                IsEmpty]: Start isEmpty. Operand 3997 states and 6687 transitions.
[2023-11-06 23:10:11,872 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 418
[2023-11-06 23:10:11,872 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:11,873 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:11,873 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 23:10:11,873 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:11,874 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:11,874 INFO  L85        PathProgramCache]: Analyzing trace with hash -1693447744, now seen corresponding path program 1 times
[2023-11-06 23:10:11,875 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:11,875 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380590810]
[2023-11-06 23:10:11,876 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:11,876 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:12,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:13,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:13,325 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:13,325 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380590810]
[2023-11-06 23:10:13,325 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380590810] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:13,326 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:13,326 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:13,326 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096930239]
[2023-11-06 23:10:13,327 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:13,327 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:13,328 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:13,329 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:13,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:13,330 INFO  L87              Difference]: Start difference. First operand 3997 states and 6687 transitions. Second operand  has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 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)
[2023-11-06 23:10:13,709 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:13,710 INFO  L93              Difference]: Finished difference Result 11669 states and 19528 transitions.
[2023-11-06 23:10:13,710 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-06 23:10:13,711 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 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 417
[2023-11-06 23:10:13,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:13,755 INFO  L225             Difference]: With dead ends: 11669
[2023-11-06 23:10:13,755 INFO  L226             Difference]: Without dead ends: 7830
[2023-11-06 23:10:13,764 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:10:13,770 INFO  L413           NwaCegarLoop]: 7436 mSDtfsCounter, 6412 mSDsluCounter, 14106 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6412 SdHoareTripleChecker+Valid, 21542 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:13,771 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6412 Valid, 21542 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:13,784 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7830 states.
[2023-11-06 23:10:13,888 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 3999.
[2023-11-06 23:10:13,898 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3999 states, 3998 states have (on average 1.6730865432716358) internal successors, (6689), 3998 states have internal predecessors, (6689), 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)
[2023-11-06 23:10:13,914 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 6689 transitions.
[2023-11-06 23:10:13,915 INFO  L78                 Accepts]: Start accepts. Automaton has 3999 states and 6689 transitions. Word has length 417
[2023-11-06 23:10:13,915 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:13,916 INFO  L495      AbstractCegarLoop]: Abstraction has 3999 states and 6689 transitions.
[2023-11-06 23:10:13,917 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 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)
[2023-11-06 23:10:13,920 INFO  L276                IsEmpty]: Start isEmpty. Operand 3999 states and 6689 transitions.
[2023-11-06 23:10:13,928 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 419
[2023-11-06 23:10:13,928 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:13,928 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:13,929 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 23:10:13,930 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:13,931 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:13,932 INFO  L85        PathProgramCache]: Analyzing trace with hash 642636720, now seen corresponding path program 1 times
[2023-11-06 23:10:13,933 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:13,939 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632371699]
[2023-11-06 23:10:13,939 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:13,940 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:14,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:15,086 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:15,086 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:15,086 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632371699]
[2023-11-06 23:10:15,086 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632371699] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:15,086 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:15,087 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:15,087 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655329891]
[2023-11-06 23:10:15,087 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:15,088 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:15,088 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:15,089 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:15,089 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:15,090 INFO  L87              Difference]: Start difference. First operand 3999 states and 6689 transitions. Second operand  has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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)
[2023-11-06 23:10:15,478 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:15,478 INFO  L93              Difference]: Finished difference Result 11672 states and 19529 transitions.
[2023-11-06 23:10:15,479 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-06 23:10:15,479 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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 418
[2023-11-06 23:10:15,480 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:15,533 INFO  L225             Difference]: With dead ends: 11672
[2023-11-06 23:10:15,534 INFO  L226             Difference]: Without dead ends: 7831
[2023-11-06 23:10:15,540 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:10:15,542 INFO  L413           NwaCegarLoop]: 7431 mSDtfsCounter, 6409 mSDsluCounter, 14101 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6409 SdHoareTripleChecker+Valid, 21532 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:15,542 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6409 Valid, 21532 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:15,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7831 states.
[2023-11-06 23:10:15,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7831 to 4001.
[2023-11-06 23:10:15,655 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4001 states, 4000 states have (on average 1.67275) internal successors, (6691), 4000 states have internal predecessors, (6691), 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)
[2023-11-06 23:10:15,671 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 6691 transitions.
[2023-11-06 23:10:15,672 INFO  L78                 Accepts]: Start accepts. Automaton has 4001 states and 6691 transitions. Word has length 418
[2023-11-06 23:10:15,673 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:15,673 INFO  L495      AbstractCegarLoop]: Abstraction has 4001 states and 6691 transitions.
[2023-11-06 23:10:15,673 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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)
[2023-11-06 23:10:15,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 4001 states and 6691 transitions.
[2023-11-06 23:10:15,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 420
[2023-11-06 23:10:15,682 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:15,682 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:15,683 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-06 23:10:15,683 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:15,683 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:15,684 INFO  L85        PathProgramCache]: Analyzing trace with hash -628091556, now seen corresponding path program 1 times
[2023-11-06 23:10:15,684 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:15,684 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452566763]
[2023-11-06 23:10:15,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:15,685 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:15,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:16,731 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:16,731 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:16,731 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452566763]
[2023-11-06 23:10:16,731 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452566763] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:16,732 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:16,732 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:16,733 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449168894]
[2023-11-06 23:10:16,733 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:16,734 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:16,734 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:16,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:16,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:16,736 INFO  L87              Difference]: Start difference. First operand 4001 states and 6691 transitions. Second operand  has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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)
[2023-11-06 23:10:17,089 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:17,089 INFO  L93              Difference]: Finished difference Result 11675 states and 19530 transitions.
[2023-11-06 23:10:17,090 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-06 23:10:17,090 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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 419
[2023-11-06 23:10:17,091 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:17,122 INFO  L225             Difference]: With dead ends: 11675
[2023-11-06 23:10:17,122 INFO  L226             Difference]: Without dead ends: 7832
[2023-11-06 23:10:17,129 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:10:17,130 INFO  L413           NwaCegarLoop]: 7426 mSDtfsCounter, 6406 mSDsluCounter, 14096 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6406 SdHoareTripleChecker+Valid, 21522 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:17,130 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6406 Valid, 21522 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:17,142 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7832 states.
[2023-11-06 23:10:17,230 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 4003.
[2023-11-06 23:10:17,245 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4003 states, 4002 states have (on average 1.6724137931034482) internal successors, (6693), 4002 states have internal predecessors, (6693), 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)
[2023-11-06 23:10:17,259 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 6693 transitions.
[2023-11-06 23:10:17,259 INFO  L78                 Accepts]: Start accepts. Automaton has 4003 states and 6693 transitions. Word has length 419
[2023-11-06 23:10:17,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:17,260 INFO  L495      AbstractCegarLoop]: Abstraction has 4003 states and 6693 transitions.
[2023-11-06 23:10:17,261 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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)
[2023-11-06 23:10:17,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 4003 states and 6693 transitions.
[2023-11-06 23:10:17,269 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 421
[2023-11-06 23:10:17,269 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:17,270 INFO  L195           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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:17,270 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-06 23:10:17,270 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:17,271 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:17,271 INFO  L85        PathProgramCache]: Analyzing trace with hash -616055016, now seen corresponding path program 1 times
[2023-11-06 23:10:17,271 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:17,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167630594]
[2023-11-06 23:10:17,271 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:17,272 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:17,480 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:18,372 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:18,373 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:18,373 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167630594]
[2023-11-06 23:10:18,373 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167630594] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:18,373 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:18,373 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 23:10:18,374 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438256972]
[2023-11-06 23:10:18,374 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:18,375 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:10:18,375 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:18,376 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:10:18,376 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:10:18,377 INFO  L87              Difference]: Start difference. First operand 4003 states and 6693 transitions. Second operand  has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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)
[2023-11-06 23:10:18,893 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:18,893 INFO  L93              Difference]: Finished difference Result 12144 states and 20305 transitions.
[2023-11-06 23:10:18,894 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:10:18,894 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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 420
[2023-11-06 23:10:18,895 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:18,910 INFO  L225             Difference]: With dead ends: 12144
[2023-11-06 23:10:18,910 INFO  L226             Difference]: Without dead ends: 8299
[2023-11-06 23:10:18,917 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 23:10:18,918 INFO  L413           NwaCegarLoop]: 7435 mSDtfsCounter, 26266 mSDsluCounter, 13355 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26266 SdHoareTripleChecker+Valid, 20790 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:18,919 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26266 Valid, 20790 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:18,934 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8299 states.
[2023-11-06 23:10:19,044 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 4456.
[2023-11-06 23:10:19,054 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4456 states, 4455 states have (on average 1.6718294051627385) internal successors, (7448), 4455 states have internal predecessors, (7448), 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)
[2023-11-06 23:10:19,070 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 7448 transitions.
[2023-11-06 23:10:19,071 INFO  L78                 Accepts]: Start accepts. Automaton has 4456 states and 7448 transitions. Word has length 420
[2023-11-06 23:10:19,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:19,072 INFO  L495      AbstractCegarLoop]: Abstraction has 4456 states and 7448 transitions.
[2023-11-06 23:10:19,072 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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)
[2023-11-06 23:10:19,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 4456 states and 7448 transitions.
[2023-11-06 23:10:19,215 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:19,215 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:19,218 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:19,219 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-06 23:10:19,220 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:19,220 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:19,221 INFO  L85        PathProgramCache]: Analyzing trace with hash -1065781476, now seen corresponding path program 1 times
[2023-11-06 23:10:19,222 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:19,222 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474590004]
[2023-11-06 23:10:19,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:19,223 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:19,833 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:19,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832382400]
[2023-11-06 23:10:19,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:19,835 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:19,835 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:19,840 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:19,850 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 23:10:24,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:24,465 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13405 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:24,576 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:24,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:24,755 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:24,756 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:24,756 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474590004]
[2023-11-06 23:10:24,756 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:24,756 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832382400]
[2023-11-06 23:10:24,756 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [832382400] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:24,756 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:24,757 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:24,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975208393]
[2023-11-06 23:10:24,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:24,763 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:24,763 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:24,767 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:24,768 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:24,770 INFO  L87              Difference]: Start difference. First operand 4456 states and 7448 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:24,995 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:24,996 INFO  L93              Difference]: Finished difference Result 8311 states and 13895 transitions.
[2023-11-06 23:10:24,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:24,998 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:24,999 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:25,009 INFO  L225             Difference]: With dead ends: 8311
[2023-11-06 23:10:25,009 INFO  L226             Difference]: Without dead ends: 4466
[2023-11-06 23:10:25,015 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:25,016 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:25,017 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:25,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4466 states.
[2023-11-06 23:10:25,086 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 4458.
[2023-11-06 23:10:25,094 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4458 states, 4457 states have (on average 1.671527933587615) internal successors, (7450), 4457 states have internal predecessors, (7450), 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)
[2023-11-06 23:10:25,106 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 7450 transitions.
[2023-11-06 23:10:25,106 INFO  L78                 Accepts]: Start accepts. Automaton has 4458 states and 7450 transitions. Word has length 2813
[2023-11-06 23:10:25,108 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:25,108 INFO  L495      AbstractCegarLoop]: Abstraction has 4458 states and 7450 transitions.
[2023-11-06 23:10:25,110 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:25,110 INFO  L276                IsEmpty]: Start isEmpty. Operand 4458 states and 7450 transitions.
[2023-11-06 23:10:25,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:25,176 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:25,178 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:25,226 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:25,408 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:25,409 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:25,409 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:25,410 INFO  L85        PathProgramCache]: Analyzing trace with hash -589157398, now seen corresponding path program 1 times
[2023-11-06 23:10:25,410 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:25,411 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3769002]
[2023-11-06 23:10:25,411 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:25,411 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:26,034 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:26,035 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414242056]
[2023-11-06 23:10:26,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:26,036 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:26,036 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:26,037 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:26,045 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 23:10:30,318 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:30,396 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13406 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:30,491 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:30,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:30,641 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:30,642 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:30,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3769002]
[2023-11-06 23:10:30,642 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:30,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414242056]
[2023-11-06 23:10:30,642 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [414242056] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:30,643 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:30,644 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:30,644 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783744614]
[2023-11-06 23:10:30,644 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:30,651 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:30,651 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:30,656 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:30,657 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:30,660 INFO  L87              Difference]: Start difference. First operand 4458 states and 7450 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:30,925 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:30,925 INFO  L93              Difference]: Finished difference Result 8314 states and 13897 transitions.
[2023-11-06 23:10:30,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:30,928 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:30,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:30,941 INFO  L225             Difference]: With dead ends: 8314
[2023-11-06 23:10:30,941 INFO  L226             Difference]: Without dead ends: 4467
[2023-11-06 23:10:30,947 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:30,949 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:30,950 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:30,958 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4467 states.
[2023-11-06 23:10:31,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4459.
[2023-11-06 23:10:31,044 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4459 states, 4458 states have (on average 1.6713772992373261) internal successors, (7451), 4458 states have internal predecessors, (7451), 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)
[2023-11-06 23:10:31,059 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 7451 transitions.
[2023-11-06 23:10:31,059 INFO  L78                 Accepts]: Start accepts. Automaton has 4459 states and 7451 transitions. Word has length 2813
[2023-11-06 23:10:31,061 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:31,062 INFO  L495      AbstractCegarLoop]: Abstraction has 4459 states and 7451 transitions.
[2023-11-06 23:10:31,063 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:31,063 INFO  L276                IsEmpty]: Start isEmpty. Operand 4459 states and 7451 transitions.
[2023-11-06 23:10:31,242 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:31,243 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:31,246 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:10:31,287 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:31,469 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:31,470 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:31,471 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:31,472 INFO  L85        PathProgramCache]: Analyzing trace with hash 1694264248, now seen corresponding path program 1 times
[2023-11-06 23:10:31,473 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:31,473 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466373688]
[2023-11-06 23:10:31,473 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:31,473 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:31,958 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:31,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639612031]
[2023-11-06 23:10:31,960 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:31,960 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:31,960 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:31,961 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:31,980 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 23:10:35,778 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:35,868 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13407 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:35,932 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:36,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:36,035 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:36,035 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:36,035 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466373688]
[2023-11-06 23:10:36,035 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:36,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639612031]
[2023-11-06 23:10:36,036 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [639612031] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:36,036 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:36,037 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:36,037 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766536794]
[2023-11-06 23:10:36,037 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:36,041 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:36,041 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:36,045 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:36,045 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:36,047 INFO  L87              Difference]: Start difference. First operand 4459 states and 7451 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:36,229 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:36,230 INFO  L93              Difference]: Finished difference Result 8316 states and 13899 transitions.
[2023-11-06 23:10:36,230 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:36,231 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:36,233 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:36,241 INFO  L225             Difference]: With dead ends: 8316
[2023-11-06 23:10:36,241 INFO  L226             Difference]: Without dead ends: 4468
[2023-11-06 23:10:36,246 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:36,249 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:36,249 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:36,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4468 states.
[2023-11-06 23:10:36,328 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4460.
[2023-11-06 23:10:36,334 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4460 states, 4459 states have (on average 1.6712267324512222) internal successors, (7452), 4459 states have internal predecessors, (7452), 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)
[2023-11-06 23:10:36,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 7452 transitions.
[2023-11-06 23:10:36,349 INFO  L78                 Accepts]: Start accepts. Automaton has 4460 states and 7452 transitions. Word has length 2813
[2023-11-06 23:10:36,351 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:36,351 INFO  L495      AbstractCegarLoop]: Abstraction has 4460 states and 7452 transitions.
[2023-11-06 23:10:36,352 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:36,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 4460 states and 7452 transitions.
[2023-11-06 23:10:36,504 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:36,505 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:36,507 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:36,549 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:36,732 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:36,733 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:36,734 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:36,735 INFO  L85        PathProgramCache]: Analyzing trace with hash 689753222, now seen corresponding path program 1 times
[2023-11-06 23:10:36,735 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:36,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776078699]
[2023-11-06 23:10:36,735 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:36,736 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:37,155 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:37,156 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730483272]
[2023-11-06 23:10:37,157 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:37,157 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:37,157 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:37,158 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:37,180 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 23:10:40,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:40,970 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13408 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:41,047 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:41,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:41,147 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:41,147 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:41,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776078699]
[2023-11-06 23:10:41,147 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:41,148 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730483272]
[2023-11-06 23:10:41,148 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [730483272] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:41,148 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:41,149 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:41,149 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321833670]
[2023-11-06 23:10:41,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:41,153 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:41,153 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:41,157 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:41,157 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:41,158 INFO  L87              Difference]: Start difference. First operand 4460 states and 7452 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:41,333 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:41,333 INFO  L93              Difference]: Finished difference Result 8318 states and 13901 transitions.
[2023-11-06 23:10:41,334 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:41,335 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:41,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:41,345 INFO  L225             Difference]: With dead ends: 8318
[2023-11-06 23:10:41,345 INFO  L226             Difference]: Without dead ends: 4469
[2023-11-06 23:10:41,350 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:41,351 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:41,352 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:41,358 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4469 states.
[2023-11-06 23:10:41,414 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4461.
[2023-11-06 23:10:41,421 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4461 states, 4460 states have (on average 1.6710762331838565) internal successors, (7453), 4460 states have internal predecessors, (7453), 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)
[2023-11-06 23:10:41,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 7453 transitions.
[2023-11-06 23:10:41,436 INFO  L78                 Accepts]: Start accepts. Automaton has 4461 states and 7453 transitions. Word has length 2813
[2023-11-06 23:10:41,438 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:41,438 INFO  L495      AbstractCegarLoop]: Abstraction has 4461 states and 7453 transitions.
[2023-11-06 23:10:41,440 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:41,440 INFO  L276                IsEmpty]: Start isEmpty. Operand 4461 states and 7453 transitions.
[2023-11-06 23:10:41,561 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:41,562 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:41,564 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:41,601 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:41,766 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 23:10:41,766 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:41,767 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:41,768 INFO  L85        PathProgramCache]: Analyzing trace with hash -2098970796, now seen corresponding path program 1 times
[2023-11-06 23:10:41,768 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:41,768 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945944541]
[2023-11-06 23:10:41,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:41,769 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:42,236 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:42,236 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321863355]
[2023-11-06 23:10:42,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:42,237 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:42,237 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:42,238 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:42,242 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 23:10:45,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:45,968 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13409 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:46,024 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:46,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:46,124 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:46,124 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:46,124 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945944541]
[2023-11-06 23:10:46,125 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:46,125 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321863355]
[2023-11-06 23:10:46,125 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [321863355] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:46,125 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:46,126 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:46,126 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622365180]
[2023-11-06 23:10:46,126 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:46,130 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:46,130 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:46,134 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:46,135 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:46,136 INFO  L87              Difference]: Start difference. First operand 4461 states and 7453 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:46,310 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:46,311 INFO  L93              Difference]: Finished difference Result 8320 states and 13903 transitions.
[2023-11-06 23:10:46,311 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:46,312 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:46,314 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:46,323 INFO  L225             Difference]: With dead ends: 8320
[2023-11-06 23:10:46,323 INFO  L226             Difference]: Without dead ends: 4470
[2023-11-06 23:10:46,328 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:46,329 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:46,329 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:46,335 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4470 states.
[2023-11-06 23:10:46,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4462.
[2023-11-06 23:10:46,394 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4462 states, 4461 states have (on average 1.670925801389823) internal successors, (7454), 4461 states have internal predecessors, (7454), 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)
[2023-11-06 23:10:46,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 7454 transitions.
[2023-11-06 23:10:46,406 INFO  L78                 Accepts]: Start accepts. Automaton has 4462 states and 7454 transitions. Word has length 2813
[2023-11-06 23:10:46,408 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:46,408 INFO  L495      AbstractCegarLoop]: Abstraction has 4462 states and 7454 transitions.
[2023-11-06 23:10:46,409 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:46,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 4462 states and 7454 transitions.
[2023-11-06 23:10:46,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:46,481 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:46,483 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:46,529 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:46,696 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-06 23:10:46,697 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:46,697 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:46,698 INFO  L85        PathProgramCache]: Analyzing trace with hash 691452194, now seen corresponding path program 1 times
[2023-11-06 23:10:46,699 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:46,699 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559181936]
[2023-11-06 23:10:46,699 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:46,699 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:47,235 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:47,235 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535879694]
[2023-11-06 23:10:47,236 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:47,236 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:47,237 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:47,238 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:47,256 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 23:10:51,040 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:51,115 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13410 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:51,167 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:51,267 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:51,267 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:51,267 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:51,267 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559181936]
[2023-11-06 23:10:51,268 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:51,268 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535879694]
[2023-11-06 23:10:51,268 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [535879694] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:51,268 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:51,269 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:51,272 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951850562]
[2023-11-06 23:10:51,272 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:51,276 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:51,276 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:51,280 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:51,280 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:51,281 INFO  L87              Difference]: Start difference. First operand 4462 states and 7454 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:51,428 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:51,429 INFO  L93              Difference]: Finished difference Result 8322 states and 13905 transitions.
[2023-11-06 23:10:51,429 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:51,430 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:51,432 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:51,441 INFO  L225             Difference]: With dead ends: 8322
[2023-11-06 23:10:51,441 INFO  L226             Difference]: Without dead ends: 4471
[2023-11-06 23:10:51,446 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:51,447 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:51,448 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:51,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4471 states.
[2023-11-06 23:10:51,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 4463.
[2023-11-06 23:10:51,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4463 states, 4462 states have (on average 1.6707754370237562) internal successors, (7455), 4462 states have internal predecessors, (7455), 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)
[2023-11-06 23:10:51,524 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 7455 transitions.
[2023-11-06 23:10:51,524 INFO  L78                 Accepts]: Start accepts. Automaton has 4463 states and 7455 transitions. Word has length 2813
[2023-11-06 23:10:51,526 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:51,527 INFO  L495      AbstractCegarLoop]: Abstraction has 4463 states and 7455 transitions.
[2023-11-06 23:10:51,528 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:51,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 4463 states and 7455 transitions.
[2023-11-06 23:10:51,592 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:51,593 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:51,595 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:51,637 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:51,812 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 23:10:51,812 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:51,812 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:51,813 INFO  L85        PathProgramCache]: Analyzing trace with hash 573821552, now seen corresponding path program 1 times
[2023-11-06 23:10:51,814 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:51,814 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865507632]
[2023-11-06 23:10:51,814 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:51,815 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:52,166 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:52,166 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333037825]
[2023-11-06 23:10:52,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:52,167 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:52,167 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:52,169 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:52,188 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 23:10:55,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:55,970 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13411 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:10:56,022 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:56,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:10:56,126 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:10:56,126 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:56,126 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865507632]
[2023-11-06 23:10:56,126 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:56,126 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333037825]
[2023-11-06 23:10:56,127 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [333037825] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:56,127 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:56,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:56,128 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806868707]
[2023-11-06 23:10:56,128 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:56,132 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:56,132 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:56,136 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:56,136 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:56,137 INFO  L87              Difference]: Start difference. First operand 4463 states and 7455 transitions. Second operand  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:56,280 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:56,281 INFO  L93              Difference]: Finished difference Result 8324 states and 13907 transitions.
[2023-11-06 23:10:56,281 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:56,282 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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 2813
[2023-11-06 23:10:56,285 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:56,294 INFO  L225             Difference]: With dead ends: 8324
[2023-11-06 23:10:56,294 INFO  L226             Difference]: Without dead ends: 4472
[2023-11-06 23:10:56,299 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:56,300 INFO  L413           NwaCegarLoop]: 6681 mSDtfsCounter, 12 mSDsluCounter, 13350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20031 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:56,300 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20031 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:10:56,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4472 states.
[2023-11-06 23:10:56,364 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4472 to 4464.
[2023-11-06 23:10:56,372 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4464 states, 4463 states have (on average 1.6706251400403316) internal successors, (7456), 4463 states have internal predecessors, (7456), 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)
[2023-11-06 23:10:56,382 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 7456 transitions.
[2023-11-06 23:10:56,382 INFO  L78                 Accepts]: Start accepts. Automaton has 4464 states and 7456 transitions. Word has length 2813
[2023-11-06 23:10:56,392 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:56,392 INFO  L495      AbstractCegarLoop]: Abstraction has 4464 states and 7456 transitions.
[2023-11-06 23:10:56,394 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 703.25) internal successors, (2813), 4 states have internal predecessors, (2813), 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)
[2023-11-06 23:10:56,394 INFO  L276                IsEmpty]: Start isEmpty. Operand 4464 states and 7456 transitions.
[2023-11-06 23:10:56,456 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2814
[2023-11-06 23:10:56,456 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:56,458 INFO  L195           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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 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[2023-11-06 23:10:56,499 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 23:10:56,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 23:10:56,673 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:56,673 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:56,674 INFO  L85        PathProgramCache]: Analyzing trace with hash -1614087234, now seen corresponding path program 1 times
[2023-11-06 23:10:56,674 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:56,674 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832329424]
[2023-11-06 23:10:56,675 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:56,675 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:57,002 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:57,003 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144294941]
[2023-11-06 23:10:57,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:57,004 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:57,004 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:57,005 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:57,008 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 23:11:00,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:00,763 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13412 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:00,817 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:01,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked.
[2023-11-06 23:11:01,090 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:01,090 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:01,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832329424]
[2023-11-06 23:11:01,090 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:01,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144294941]
[2023-11-06 23:11:01,091 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144294941] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:01,091 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:01,091 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:01,092 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556772146]
[2023-11-06 23:11:01,092 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:01,095 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:01,096 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:01,099 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:01,099 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:01,101 INFO  L87              Difference]: Start difference. First operand 4464 states and 7456 transitions. Second operand  has 7 states, 7 states have (on average 359.7142857142857) internal successors, (2518), 7 states have internal predecessors, (2518), 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)
[2023-11-06 23:11:01,567 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:01,567 INFO  L93              Difference]: Finished difference Result 12165 states and 20326 transitions.
[2023-11-06 23:11:01,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:01,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 359.7142857142857) internal successors, (2518), 7 states have internal predecessors, (2518), 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 2813
[2023-11-06 23:11:01,575 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:01,591 INFO  L225             Difference]: With dead ends: 12165
[2023-11-06 23:11:01,591 INFO  L226             Difference]: Without dead ends: 8305
[2023-11-06 23:11:01,597 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2822 GetRequests, 2810 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:01,598 INFO  L413           NwaCegarLoop]: 7418 mSDtfsCounter, 18650 mSDsluCounter, 28913 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18650 SdHoareTripleChecker+Valid, 36331 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:01,599 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18650 Valid, 36331 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:01,609 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8305 states.
[2023-11-06 23:11:01,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 4466.
[2023-11-06 23:11:01,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4466 states, 4465 states have (on average 1.6703247480403136) internal successors, (7458), 4465 states have internal predecessors, (7458), 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)
[2023-11-06 23:11:01,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 7458 transitions.
[2023-11-06 23:11:01,702 INFO  L78                 Accepts]: Start accepts. Automaton has 4466 states and 7458 transitions. Word has length 2813
[2023-11-06 23:11:01,707 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:01,707 INFO  L495      AbstractCegarLoop]: Abstraction has 4466 states and 7458 transitions.
[2023-11-06 23:11:01,708 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 359.7142857142857) internal successors, (2518), 7 states have internal predecessors, (2518), 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)
[2023-11-06 23:11:01,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 4466 states and 7458 transitions.
[2023-11-06 23:11:01,770 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2815
[2023-11-06 23:11:01,770 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:01,773 INFO  L195           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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:11:01,811 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:01,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 23:11:01,985 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:01,985 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:01,987 INFO  L85        PathProgramCache]: Analyzing trace with hash -338097648, now seen corresponding path program 1 times
[2023-11-06 23:11:01,987 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:01,987 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306835670]
[2023-11-06 23:11:01,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:01,988 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:02,333 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:02,334 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564864566]
[2023-11-06 23:11:02,335 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:02,335 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:02,335 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:02,336 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:02,360 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 23:11:06,004 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:06,082 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13415 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:06,130 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:06,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked.
[2023-11-06 23:11:06,418 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:06,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:06,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306835670]
[2023-11-06 23:11:06,418 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:06,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564864566]
[2023-11-06 23:11:06,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564864566] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:06,419 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:06,420 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:06,420 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897904562]
[2023-11-06 23:11:06,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:06,423 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:06,424 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:06,428 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:06,428 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:06,429 INFO  L87              Difference]: Start difference. First operand 4466 states and 7458 transitions. Second operand  has 7 states, 7 states have (on average 360.14285714285717) internal successors, (2521), 7 states have internal predecessors, (2521), 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)
[2023-11-06 23:11:06,919 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:06,919 INFO  L93              Difference]: Finished difference Result 12171 states and 20332 transitions.
[2023-11-06 23:11:06,919 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:06,920 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 360.14285714285717) internal successors, (2521), 7 states have internal predecessors, (2521), 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 2814
[2023-11-06 23:11:06,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:06,943 INFO  L225             Difference]: With dead ends: 12171
[2023-11-06 23:11:06,943 INFO  L226             Difference]: Without dead ends: 8306
[2023-11-06 23:11:06,949 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2823 GetRequests, 2811 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:06,950 INFO  L413           NwaCegarLoop]: 7413 mSDtfsCounter, 18649 mSDsluCounter, 28898 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18649 SdHoareTripleChecker+Valid, 36311 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:06,950 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18649 Valid, 36311 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:06,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8306 states.
[2023-11-06 23:11:07,031 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8306 to 4468.
[2023-11-06 23:11:07,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4468 states, 4467 states have (on average 1.6700246250279829) internal successors, (7460), 4467 states have internal predecessors, (7460), 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)
[2023-11-06 23:11:07,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 7460 transitions.
[2023-11-06 23:11:07,048 INFO  L78                 Accepts]: Start accepts. Automaton has 4468 states and 7460 transitions. Word has length 2814
[2023-11-06 23:11:07,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:07,053 INFO  L495      AbstractCegarLoop]: Abstraction has 4468 states and 7460 transitions.
[2023-11-06 23:11:07,054 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 360.14285714285717) internal successors, (2521), 7 states have internal predecessors, (2521), 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)
[2023-11-06 23:11:07,054 INFO  L276                IsEmpty]: Start isEmpty. Operand 4468 states and 7460 transitions.
[2023-11-06 23:11:07,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2816
[2023-11-06 23:11:07,116 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:07,118 INFO  L195           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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:11:07,165 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:07,344 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 23:11:07,345 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:07,345 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:07,346 INFO  L85        PathProgramCache]: Analyzing trace with hash -692907356, now seen corresponding path program 1 times
[2023-11-06 23:11:07,346 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:07,346 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391399754]
[2023-11-06 23:11:07,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:07,347 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:07,680 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:07,681 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530019459]
[2023-11-06 23:11:07,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:07,682 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:07,682 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:07,683 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:07,687 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 23:11:11,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:11,508 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13418 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:11,546 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:11,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked.
[2023-11-06 23:11:11,813 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:11,814 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:11,814 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391399754]
[2023-11-06 23:11:11,814 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:11,814 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530019459]
[2023-11-06 23:11:11,814 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530019459] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:11,814 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:11,815 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:11,817 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845800381]
[2023-11-06 23:11:11,817 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:11,820 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:11,821 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:11,824 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:11,824 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:11,826 INFO  L87              Difference]: Start difference. First operand 4468 states and 7460 transitions. Second operand  has 7 states, 7 states have (on average 360.57142857142856) internal successors, (2524), 7 states have internal predecessors, (2524), 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)
[2023-11-06 23:11:12,238 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:12,239 INFO  L93              Difference]: Finished difference Result 12177 states and 20338 transitions.
[2023-11-06 23:11:12,239 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:12,240 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 360.57142857142856) internal successors, (2524), 7 states have internal predecessors, (2524), 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 2815
[2023-11-06 23:11:12,242 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:12,258 INFO  L225             Difference]: With dead ends: 12177
[2023-11-06 23:11:12,258 INFO  L226             Difference]: Without dead ends: 8307
[2023-11-06 23:11:12,264 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2824 GetRequests, 2812 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:12,265 INFO  L413           NwaCegarLoop]: 7408 mSDtfsCounter, 18648 mSDsluCounter, 28883 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18648 SdHoareTripleChecker+Valid, 36291 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:12,265 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18648 Valid, 36291 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:12,275 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8307 states.
[2023-11-06 23:11:12,343 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8307 to 4470.
[2023-11-06 23:11:12,348 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4470 states, 4469 states have (on average 1.6697247706422018) internal successors, (7462), 4469 states have internal predecessors, (7462), 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)
[2023-11-06 23:11:12,358 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 7462 transitions.
[2023-11-06 23:11:12,358 INFO  L78                 Accepts]: Start accepts. Automaton has 4470 states and 7462 transitions. Word has length 2815
[2023-11-06 23:11:12,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:12,361 INFO  L495      AbstractCegarLoop]: Abstraction has 4470 states and 7462 transitions.
[2023-11-06 23:11:12,362 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 360.57142857142856) internal successors, (2524), 7 states have internal predecessors, (2524), 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)
[2023-11-06 23:11:12,362 INFO  L276                IsEmpty]: Start isEmpty. Operand 4470 states and 7462 transitions.
[2023-11-06 23:11:12,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2817
[2023-11-06 23:11:12,423 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:12,425 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:12,468 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:12,644 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 23:11:12,644 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:12,644 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:12,646 INFO  L85        PathProgramCache]: Analyzing trace with hash -479436756, now seen corresponding path program 1 times
[2023-11-06 23:11:12,646 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:12,646 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924235425]
[2023-11-06 23:11:12,646 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:12,646 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:12,978 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:12,979 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508030225]
[2023-11-06 23:11:12,979 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:12,980 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:12,980 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:12,981 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:13,004 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 23:11:16,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:16,713 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13422 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:16,748 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:17,007 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked.
[2023-11-06 23:11:17,007 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:17,007 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:17,008 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924235425]
[2023-11-06 23:11:17,008 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:17,008 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508030225]
[2023-11-06 23:11:17,008 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508030225] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:17,008 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:17,009 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:17,009 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319099433]
[2023-11-06 23:11:17,009 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:17,013 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:17,013 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:17,017 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:17,017 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:17,018 INFO  L87              Difference]: Start difference. First operand 4470 states and 7462 transitions. Second operand  has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 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)
[2023-11-06 23:11:17,408 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:17,408 INFO  L93              Difference]: Finished difference Result 12183 states and 20344 transitions.
[2023-11-06 23:11:17,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:17,410 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 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 2816
[2023-11-06 23:11:17,413 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:17,428 INFO  L225             Difference]: With dead ends: 12183
[2023-11-06 23:11:17,428 INFO  L226             Difference]: Without dead ends: 8308
[2023-11-06 23:11:17,434 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2825 GetRequests, 2813 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:17,435 INFO  L413           NwaCegarLoop]: 7403 mSDtfsCounter, 18647 mSDsluCounter, 28868 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18647 SdHoareTripleChecker+Valid, 36271 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:17,435 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18647 Valid, 36271 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:17,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8308 states.
[2023-11-06 23:11:17,511 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8308 to 4472.
[2023-11-06 23:11:17,516 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4472 states, 4471 states have (on average 1.6694251845224781) internal successors, (7464), 4471 states have internal predecessors, (7464), 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)
[2023-11-06 23:11:17,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 7464 transitions.
[2023-11-06 23:11:17,526 INFO  L78                 Accepts]: Start accepts. Automaton has 4472 states and 7464 transitions. Word has length 2816
[2023-11-06 23:11:17,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:17,529 INFO  L495      AbstractCegarLoop]: Abstraction has 4472 states and 7464 transitions.
[2023-11-06 23:11:17,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 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)
[2023-11-06 23:11:17,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 4472 states and 7464 transitions.
[2023-11-06 23:11:17,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2818
[2023-11-06 23:11:17,593 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:17,595 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:17,644 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:17,808 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-06 23:11:17,809 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:17,809 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:17,810 INFO  L85        PathProgramCache]: Analyzing trace with hash -776874612, now seen corresponding path program 1 times
[2023-11-06 23:11:17,810 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:17,811 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941490355]
[2023-11-06 23:11:17,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:17,811 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:18,143 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:18,143 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195446730]
[2023-11-06 23:11:18,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:18,145 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:18,145 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:18,146 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:18,172 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 23:11:21,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:21,843 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13425 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:21,878 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:22,118 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked.
[2023-11-06 23:11:22,118 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:22,118 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:22,118 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941490355]
[2023-11-06 23:11:22,118 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:22,119 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195446730]
[2023-11-06 23:11:22,119 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195446730] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:22,119 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:22,120 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:22,120 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49905707]
[2023-11-06 23:11:22,120 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:22,127 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:22,127 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:22,133 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:22,133 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:22,135 INFO  L87              Difference]: Start difference. First operand 4472 states and 7464 transitions. Second operand  has 7 states, 7 states have (on average 361.42857142857144) internal successors, (2530), 7 states have internal predecessors, (2530), 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)
[2023-11-06 23:11:22,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:22,457 INFO  L93              Difference]: Finished difference Result 12189 states and 20350 transitions.
[2023-11-06 23:11:22,457 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:22,458 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 361.42857142857144) internal successors, (2530), 7 states have internal predecessors, (2530), 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 2817
[2023-11-06 23:11:22,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:22,472 INFO  L225             Difference]: With dead ends: 12189
[2023-11-06 23:11:22,472 INFO  L226             Difference]: Without dead ends: 8309
[2023-11-06 23:11:22,477 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2826 GetRequests, 2814 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:22,478 INFO  L413           NwaCegarLoop]: 7398 mSDtfsCounter, 18646 mSDsluCounter, 28853 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18646 SdHoareTripleChecker+Valid, 36251 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:22,479 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18646 Valid, 36251 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:22,489 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8309 states.
[2023-11-06 23:11:22,554 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8309 to 4474.
[2023-11-06 23:11:22,560 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4474 states, 4473 states have (on average 1.669125866308965) internal successors, (7466), 4473 states have internal predecessors, (7466), 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)
[2023-11-06 23:11:22,570 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 7466 transitions.
[2023-11-06 23:11:22,571 INFO  L78                 Accepts]: Start accepts. Automaton has 4474 states and 7466 transitions. Word has length 2817
[2023-11-06 23:11:22,573 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:22,573 INFO  L495      AbstractCegarLoop]: Abstraction has 4474 states and 7466 transitions.
[2023-11-06 23:11:22,574 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 361.42857142857144) internal successors, (2530), 7 states have internal predecessors, (2530), 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)
[2023-11-06 23:11:22,575 INFO  L276                IsEmpty]: Start isEmpty. Operand 4474 states and 7466 transitions.
[2023-11-06 23:11:22,633 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2819
[2023-11-06 23:11:22,633 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:22,635 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:22,686 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:22,848 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 23:11:22,849 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:22,849 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:22,850 INFO  L85        PathProgramCache]: Analyzing trace with hash -1763075514, now seen corresponding path program 1 times
[2023-11-06 23:11:22,850 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:22,850 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003079473]
[2023-11-06 23:11:22,851 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:22,851 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:23,173 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:23,174 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851162642]
[2023-11-06 23:11:23,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:23,175 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:23,175 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:23,176 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:23,196 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 23:11:26,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:27,010 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13428 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:27,045 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:27,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked.
[2023-11-06 23:11:27,239 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:27,239 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:27,239 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003079473]
[2023-11-06 23:11:27,239 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:27,240 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851162642]
[2023-11-06 23:11:27,240 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [851162642] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:27,240 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:27,241 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:27,241 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693060247]
[2023-11-06 23:11:27,241 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:27,244 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:27,245 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:27,248 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:27,248 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:27,250 INFO  L87              Difference]: Start difference. First operand 4474 states and 7466 transitions. Second operand  has 7 states, 7 states have (on average 361.85714285714283) internal successors, (2533), 7 states have internal predecessors, (2533), 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)
[2023-11-06 23:11:27,554 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:27,554 INFO  L93              Difference]: Finished difference Result 12195 states and 20356 transitions.
[2023-11-06 23:11:27,555 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:27,555 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 361.85714285714283) internal successors, (2533), 7 states have internal predecessors, (2533), 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 2818
[2023-11-06 23:11:27,558 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:27,569 INFO  L225             Difference]: With dead ends: 12195
[2023-11-06 23:11:27,570 INFO  L226             Difference]: Without dead ends: 8310
[2023-11-06 23:11:27,575 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2815 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:27,575 INFO  L413           NwaCegarLoop]: 7393 mSDtfsCounter, 18645 mSDsluCounter, 28838 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18645 SdHoareTripleChecker+Valid, 36231 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:27,576 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18645 Valid, 36231 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:27,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8310 states.
[2023-11-06 23:11:27,648 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 4476.
[2023-11-06 23:11:27,653 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4476 states, 4475 states have (on average 1.6688268156424582) internal successors, (7468), 4475 states have internal predecessors, (7468), 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)
[2023-11-06 23:11:27,663 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 7468 transitions.
[2023-11-06 23:11:27,663 INFO  L78                 Accepts]: Start accepts. Automaton has 4476 states and 7468 transitions. Word has length 2818
[2023-11-06 23:11:27,665 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:27,665 INFO  L495      AbstractCegarLoop]: Abstraction has 4476 states and 7468 transitions.
[2023-11-06 23:11:27,666 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 361.85714285714283) internal successors, (2533), 7 states have internal predecessors, (2533), 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)
[2023-11-06 23:11:27,666 INFO  L276                IsEmpty]: Start isEmpty. Operand 4476 states and 7468 transitions.
[2023-11-06 23:11:27,725 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2820
[2023-11-06 23:11:27,725 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:27,728 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:27,773 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:27,940 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:27,941 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:27,941 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:27,942 INFO  L85        PathProgramCache]: Analyzing trace with hash 867496050, now seen corresponding path program 1 times
[2023-11-06 23:11:27,942 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:27,942 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300660964]
[2023-11-06 23:11:27,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:27,943 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:28,293 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:28,293 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001912725]
[2023-11-06 23:11:28,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:28,294 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:28,295 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:28,296 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:28,320 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 23:11:31,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:32,046 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13431 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:32,082 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:32,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked.
[2023-11-06 23:11:32,289 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:32,289 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:32,289 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300660964]
[2023-11-06 23:11:32,289 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:32,290 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001912725]
[2023-11-06 23:11:32,290 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001912725] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:32,290 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:32,291 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:32,291 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94953452]
[2023-11-06 23:11:32,291 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:32,294 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:32,295 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:32,298 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:32,299 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:32,300 INFO  L87              Difference]: Start difference. First operand 4476 states and 7468 transitions. Second operand  has 7 states, 7 states have (on average 362.2857142857143) internal successors, (2536), 7 states have internal predecessors, (2536), 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)
[2023-11-06 23:11:32,633 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:32,633 INFO  L93              Difference]: Finished difference Result 12201 states and 20362 transitions.
[2023-11-06 23:11:32,634 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:32,634 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 362.2857142857143) internal successors, (2536), 7 states have internal predecessors, (2536), 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 2819
[2023-11-06 23:11:32,636 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:32,643 INFO  L225             Difference]: With dead ends: 12201
[2023-11-06 23:11:32,643 INFO  L226             Difference]: Without dead ends: 8311
[2023-11-06 23:11:32,648 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2828 GetRequests, 2816 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:32,649 INFO  L413           NwaCegarLoop]: 7388 mSDtfsCounter, 18644 mSDsluCounter, 28823 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18644 SdHoareTripleChecker+Valid, 36211 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:32,650 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18644 Valid, 36211 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:32,659 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8311 states.
[2023-11-06 23:11:32,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 4478.
[2023-11-06 23:11:32,730 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4478 states, 4477 states have (on average 1.6685280321643958) internal successors, (7470), 4477 states have internal predecessors, (7470), 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)
[2023-11-06 23:11:32,739 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 7470 transitions.
[2023-11-06 23:11:32,740 INFO  L78                 Accepts]: Start accepts. Automaton has 4478 states and 7470 transitions. Word has length 2819
[2023-11-06 23:11:32,742 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:32,742 INFO  L495      AbstractCegarLoop]: Abstraction has 4478 states and 7470 transitions.
[2023-11-06 23:11:32,743 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 362.2857142857143) internal successors, (2536), 7 states have internal predecessors, (2536), 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)
[2023-11-06 23:11:32,743 INFO  L276                IsEmpty]: Start isEmpty. Operand 4478 states and 7470 transitions.
[2023-11-06 23:11:32,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2821
[2023-11-06 23:11:32,801 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:32,803 INFO  L195           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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:11:32,849 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:33,020 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:33,020 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:33,021 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:33,022 INFO  L85        PathProgramCache]: Analyzing trace with hash -2077091486, now seen corresponding path program 1 times
[2023-11-06 23:11:33,022 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:33,022 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91742746]
[2023-11-06 23:11:33,023 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:33,023 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:33,410 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:33,410 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91716781]
[2023-11-06 23:11:33,411 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:33,411 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:33,411 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:33,412 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:33,436 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 23:11:37,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:37,159 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13435 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:37,194 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:37,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2023-11-06 23:11:37,390 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:37,390 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:37,390 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91742746]
[2023-11-06 23:11:37,391 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:37,391 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91716781]
[2023-11-06 23:11:37,391 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [91716781] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:37,391 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:37,392 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:37,392 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064215797]
[2023-11-06 23:11:37,392 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:37,395 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:37,396 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:37,399 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:37,399 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:37,400 INFO  L87              Difference]: Start difference. First operand 4478 states and 7470 transitions. Second operand  has 7 states, 7 states have (on average 362.7142857142857) internal successors, (2539), 7 states have internal predecessors, (2539), 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)
[2023-11-06 23:11:37,713 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:37,713 INFO  L93              Difference]: Finished difference Result 12207 states and 20368 transitions.
[2023-11-06 23:11:37,713 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:37,714 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 362.7142857142857) internal successors, (2539), 7 states have internal predecessors, (2539), 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 2820
[2023-11-06 23:11:37,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:37,722 INFO  L225             Difference]: With dead ends: 12207
[2023-11-06 23:11:37,722 INFO  L226             Difference]: Without dead ends: 8312
[2023-11-06 23:11:37,727 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2829 GetRequests, 2817 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:37,727 INFO  L413           NwaCegarLoop]: 7383 mSDtfsCounter, 18643 mSDsluCounter, 28808 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18643 SdHoareTripleChecker+Valid, 36191 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:37,728 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18643 Valid, 36191 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:37,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8312 states.
[2023-11-06 23:11:37,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8312 to 4480.
[2023-11-06 23:11:37,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4480 states, 4479 states have (on average 1.6682295155168565) internal successors, (7472), 4479 states have internal predecessors, (7472), 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)
[2023-11-06 23:11:37,817 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 7472 transitions.
[2023-11-06 23:11:37,817 INFO  L78                 Accepts]: Start accepts. Automaton has 4480 states and 7472 transitions. Word has length 2820
[2023-11-06 23:11:37,819 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:37,819 INFO  L495      AbstractCegarLoop]: Abstraction has 4480 states and 7472 transitions.
[2023-11-06 23:11:37,820 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 362.7142857142857) internal successors, (2539), 7 states have internal predecessors, (2539), 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)
[2023-11-06 23:11:37,820 INFO  L276                IsEmpty]: Start isEmpty. Operand 4480 states and 7472 transitions.
[2023-11-06 23:11:37,879 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2822
[2023-11-06 23:11:37,880 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:37,882 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:37,930 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:38,096 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-06 23:11:38,097 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:38,097 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:38,098 INFO  L85        PathProgramCache]: Analyzing trace with hash 1775993946, now seen corresponding path program 1 times
[2023-11-06 23:11:38,099 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:38,099 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938767058]
[2023-11-06 23:11:38,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:38,099 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:38,472 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:38,472 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411241601]
[2023-11-06 23:11:38,473 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:38,473 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:38,473 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:38,475 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:38,481 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 23:11:42,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:42,301 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13438 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:42,337 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:42,528 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked.
[2023-11-06 23:11:42,528 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:42,528 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:42,528 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938767058]
[2023-11-06 23:11:42,529 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:42,529 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411241601]
[2023-11-06 23:11:42,529 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [411241601] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:42,529 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:42,530 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:42,530 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408642212]
[2023-11-06 23:11:42,530 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:42,534 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:42,534 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:42,537 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:42,537 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:42,538 INFO  L87              Difference]: Start difference. First operand 4480 states and 7472 transitions. Second operand  has 7 states, 7 states have (on average 363.14285714285717) internal successors, (2542), 7 states have internal predecessors, (2542), 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)
[2023-11-06 23:11:42,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:42,863 INFO  L93              Difference]: Finished difference Result 12213 states and 20374 transitions.
[2023-11-06 23:11:42,863 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:42,864 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 363.14285714285717) internal successors, (2542), 7 states have internal predecessors, (2542), 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 2821
[2023-11-06 23:11:42,866 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:42,873 INFO  L225             Difference]: With dead ends: 12213
[2023-11-06 23:11:42,873 INFO  L226             Difference]: Without dead ends: 8313
[2023-11-06 23:11:42,876 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2830 GetRequests, 2818 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:42,877 INFO  L413           NwaCegarLoop]: 7378 mSDtfsCounter, 18642 mSDsluCounter, 28793 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18642 SdHoareTripleChecker+Valid, 36171 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:42,878 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18642 Valid, 36171 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:42,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8313 states.
[2023-11-06 23:11:42,962 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 4482.
[2023-11-06 23:11:42,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4482 states, 4481 states have (on average 1.6679312653425575) internal successors, (7474), 4481 states have internal predecessors, (7474), 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)
[2023-11-06 23:11:42,978 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 7474 transitions.
[2023-11-06 23:11:42,978 INFO  L78                 Accepts]: Start accepts. Automaton has 4482 states and 7474 transitions. Word has length 2821
[2023-11-06 23:11:42,980 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:42,980 INFO  L495      AbstractCegarLoop]: Abstraction has 4482 states and 7474 transitions.
[2023-11-06 23:11:42,981 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 363.14285714285717) internal successors, (2542), 7 states have internal predecessors, (2542), 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)
[2023-11-06 23:11:42,981 INFO  L276                IsEmpty]: Start isEmpty. Operand 4482 states and 7474 transitions.
[2023-11-06 23:11:43,022 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2823
[2023-11-06 23:11:43,022 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:43,024 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:43,064 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:43,244 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:43,245 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:43,245 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:43,246 INFO  L85        PathProgramCache]: Analyzing trace with hash 1175957372, now seen corresponding path program 1 times
[2023-11-06 23:11:43,246 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:43,246 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794247510]
[2023-11-06 23:11:43,247 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:43,247 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:43,531 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:43,531 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124775420]
[2023-11-06 23:11:43,532 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:43,533 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:43,533 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:43,534 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:43,546 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 23:11:47,246 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:47,324 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13441 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:47,361 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:47,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked.
[2023-11-06 23:11:47,564 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:47,564 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:47,564 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794247510]
[2023-11-06 23:11:47,565 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:47,565 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124775420]
[2023-11-06 23:11:47,565 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124775420] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:47,565 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:47,566 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:47,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823841078]
[2023-11-06 23:11:47,568 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:47,571 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:47,572 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:47,574 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:47,575 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:47,575 INFO  L87              Difference]: Start difference. First operand 4482 states and 7474 transitions. Second operand  has 7 states, 7 states have (on average 363.57142857142856) internal successors, (2545), 7 states have internal predecessors, (2545), 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)
[2023-11-06 23:11:47,874 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:47,875 INFO  L93              Difference]: Finished difference Result 12219 states and 20380 transitions.
[2023-11-06 23:11:47,875 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:47,876 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 363.57142857142856) internal successors, (2545), 7 states have internal predecessors, (2545), 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 2822
[2023-11-06 23:11:47,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:47,884 INFO  L225             Difference]: With dead ends: 12219
[2023-11-06 23:11:47,884 INFO  L226             Difference]: Without dead ends: 8314
[2023-11-06 23:11:47,888 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2831 GetRequests, 2819 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:47,888 INFO  L413           NwaCegarLoop]: 7373 mSDtfsCounter, 18641 mSDsluCounter, 28778 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18641 SdHoareTripleChecker+Valid, 36151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:47,888 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18641 Valid, 36151 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:47,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8314 states.
[2023-11-06 23:11:47,959 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 4484.
[2023-11-06 23:11:47,964 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4484 states, 4483 states have (on average 1.667633281284854) internal successors, (7476), 4483 states have internal predecessors, (7476), 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)
[2023-11-06 23:11:47,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 7476 transitions.
[2023-11-06 23:11:47,973 INFO  L78                 Accepts]: Start accepts. Automaton has 4484 states and 7476 transitions. Word has length 2822
[2023-11-06 23:11:47,975 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:47,975 INFO  L495      AbstractCegarLoop]: Abstraction has 4484 states and 7476 transitions.
[2023-11-06 23:11:47,976 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 363.57142857142856) internal successors, (2545), 7 states have internal predecessors, (2545), 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)
[2023-11-06 23:11:47,976 INFO  L276                IsEmpty]: Start isEmpty. Operand 4484 states and 7476 transitions.
[2023-11-06 23:11:48,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2824
[2023-11-06 23:11:48,036 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:48,038 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:48,074 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:48,248 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-06 23:11:48,249 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:48,249 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:48,250 INFO  L85        PathProgramCache]: Analyzing trace with hash 582296384, now seen corresponding path program 1 times
[2023-11-06 23:11:48,250 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:48,250 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234905647]
[2023-11-06 23:11:48,250 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:48,250 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:48,518 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:48,519 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643612581]
[2023-11-06 23:11:48,520 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:48,520 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:48,520 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:48,523 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:48,544 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-06 23:11:52,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:52,225 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13444 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:52,261 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:52,490 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2023-11-06 23:11:52,490 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:52,491 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:52,491 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234905647]
[2023-11-06 23:11:52,491 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:52,491 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643612581]
[2023-11-06 23:11:52,491 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643612581] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:52,491 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:52,492 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:52,492 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157007780]
[2023-11-06 23:11:52,492 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:52,495 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:52,495 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:52,498 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:52,498 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:52,499 INFO  L87              Difference]: Start difference. First operand 4484 states and 7476 transitions. Second operand  has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 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)
[2023-11-06 23:11:52,795 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:52,795 INFO  L93              Difference]: Finished difference Result 12225 states and 20386 transitions.
[2023-11-06 23:11:52,796 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:52,796 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 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 2823
[2023-11-06 23:11:52,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:52,805 INFO  L225             Difference]: With dead ends: 12225
[2023-11-06 23:11:52,805 INFO  L226             Difference]: Without dead ends: 8315
[2023-11-06 23:11:52,809 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2832 GetRequests, 2820 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:52,809 INFO  L413           NwaCegarLoop]: 7368 mSDtfsCounter, 18640 mSDsluCounter, 28763 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18640 SdHoareTripleChecker+Valid, 36131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:52,810 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18640 Valid, 36131 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:52,816 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8315 states.
[2023-11-06 23:11:52,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 4486.
[2023-11-06 23:11:52,881 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4486 states, 4485 states have (on average 1.6673355629877369) internal successors, (7478), 4485 states have internal predecessors, (7478), 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)
[2023-11-06 23:11:52,890 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 7478 transitions.
[2023-11-06 23:11:52,890 INFO  L78                 Accepts]: Start accepts. Automaton has 4486 states and 7478 transitions. Word has length 2823
[2023-11-06 23:11:52,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:52,892 INFO  L495      AbstractCegarLoop]: Abstraction has 4486 states and 7478 transitions.
[2023-11-06 23:11:52,893 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 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)
[2023-11-06 23:11:52,893 INFO  L276                IsEmpty]: Start isEmpty. Operand 4486 states and 7478 transitions.
[2023-11-06 23:11:52,940 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2825
[2023-11-06 23:11:52,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:52,941 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:52,989 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:53,156 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:53,157 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:53,157 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:53,158 INFO  L85        PathProgramCache]: Analyzing trace with hash 1370380184, now seen corresponding path program 1 times
[2023-11-06 23:11:53,158 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:53,158 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903215194]
[2023-11-06 23:11:53,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:53,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:53,438 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:53,438 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048565139]
[2023-11-06 23:11:53,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:53,439 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:53,440 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:53,441 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:53,470 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-06 23:11:57,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:57,248 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13448 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:11:57,283 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:57,473 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2023-11-06 23:11:57,473 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:11:57,473 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:57,473 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903215194]
[2023-11-06 23:11:57,474 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:57,474 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048565139]
[2023-11-06 23:11:57,474 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048565139] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:11:57,474 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:11:57,475 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:11:57,475 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743356398]
[2023-11-06 23:11:57,475 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:57,478 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:11:57,478 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:57,481 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:11:57,481 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:11:57,482 INFO  L87              Difference]: Start difference. First operand 4486 states and 7478 transitions. Second operand  has 7 states, 7 states have (on average 364.42857142857144) internal successors, (2551), 7 states have internal predecessors, (2551), 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)
[2023-11-06 23:11:57,780 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:57,780 INFO  L93              Difference]: Finished difference Result 12231 states and 20392 transitions.
[2023-11-06 23:11:57,781 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:11:57,781 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 364.42857142857144) internal successors, (2551), 7 states have internal predecessors, (2551), 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 2824
[2023-11-06 23:11:57,783 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:57,790 INFO  L225             Difference]: With dead ends: 12231
[2023-11-06 23:11:57,790 INFO  L226             Difference]: Without dead ends: 8316
[2023-11-06 23:11:57,793 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2833 GetRequests, 2821 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:57,794 INFO  L413           NwaCegarLoop]: 7363 mSDtfsCounter, 18639 mSDsluCounter, 28748 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18639 SdHoareTripleChecker+Valid, 36111 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:57,794 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18639 Valid, 36111 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:11:57,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8316 states.
[2023-11-06 23:11:57,863 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 4488.
[2023-11-06 23:11:57,868 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4488 states, 4487 states have (on average 1.6670381100958325) internal successors, (7480), 4487 states have internal predecessors, (7480), 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)
[2023-11-06 23:11:57,877 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 7480 transitions.
[2023-11-06 23:11:57,877 INFO  L78                 Accepts]: Start accepts. Automaton has 4488 states and 7480 transitions. Word has length 2824
[2023-11-06 23:11:57,879 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:57,879 INFO  L495      AbstractCegarLoop]: Abstraction has 4488 states and 7480 transitions.
[2023-11-06 23:11:57,880 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 364.42857142857144) internal successors, (2551), 7 states have internal predecessors, (2551), 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)
[2023-11-06 23:11:57,880 INFO  L276                IsEmpty]: Start isEmpty. Operand 4488 states and 7480 transitions.
[2023-11-06 23:11:57,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2826
[2023-11-06 23:11:57,939 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:57,941 INFO  L195           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, 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, 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, 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[2023-11-06 23:11:57,984 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:58,168 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:58,169 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:58,169 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:58,170 INFO  L85        PathProgramCache]: Analyzing trace with hash 2006157352, now seen corresponding path program 1 times
[2023-11-06 23:11:58,170 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:58,170 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052890234]
[2023-11-06 23:11:58,171 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:58,171 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:58,487 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:58,487 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070173403]
[2023-11-06 23:11:58,487 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:58,488 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:58,488 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:58,489 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:58,490 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-06 23:12:02,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:02,173 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13451 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:02,208 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:02,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2023-11-06 23:12:02,397 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:02,397 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:02,397 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052890234]
[2023-11-06 23:12:02,397 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:02,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070173403]
[2023-11-06 23:12:02,398 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070173403] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:02,398 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:02,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:02,399 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946058877]
[2023-11-06 23:12:02,399 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:02,401 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:02,402 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:02,403 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:02,404 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:02,404 INFO  L87              Difference]: Start difference. First operand 4488 states and 7480 transitions. Second operand  has 7 states, 7 states have (on average 364.85714285714283) internal successors, (2554), 7 states have internal predecessors, (2554), 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)
[2023-11-06 23:12:02,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:02,704 INFO  L93              Difference]: Finished difference Result 12237 states and 20398 transitions.
[2023-11-06 23:12:02,705 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:02,705 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 364.85714285714283) internal successors, (2554), 7 states have internal predecessors, (2554), 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 2825
[2023-11-06 23:12:02,707 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:02,714 INFO  L225             Difference]: With dead ends: 12237
[2023-11-06 23:12:02,714 INFO  L226             Difference]: Without dead ends: 8317
[2023-11-06 23:12:02,717 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2834 GetRequests, 2822 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:02,718 INFO  L413           NwaCegarLoop]: 7358 mSDtfsCounter, 18638 mSDsluCounter, 28733 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18638 SdHoareTripleChecker+Valid, 36091 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:02,718 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18638 Valid, 36091 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:02,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8317 states.
[2023-11-06 23:12:02,787 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8317 to 4490.
[2023-11-06 23:12:02,792 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4490 states, 4489 states have (on average 1.6667409222543996) internal successors, (7482), 4489 states have internal predecessors, (7482), 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)
[2023-11-06 23:12:02,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 7482 transitions.
[2023-11-06 23:12:02,801 INFO  L78                 Accepts]: Start accepts. Automaton has 4490 states and 7482 transitions. Word has length 2825
[2023-11-06 23:12:02,803 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:02,803 INFO  L495      AbstractCegarLoop]: Abstraction has 4490 states and 7482 transitions.
[2023-11-06 23:12:02,804 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 364.85714285714283) internal successors, (2554), 7 states have internal predecessors, (2554), 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)
[2023-11-06 23:12:02,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 4490 states and 7482 transitions.
[2023-11-06 23:12:02,864 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2827
[2023-11-06 23:12:02,864 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:02,866 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:02,909 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:03,092 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:03,093 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:03,093 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:03,094 INFO  L85        PathProgramCache]: Analyzing trace with hash 650168754, now seen corresponding path program 1 times
[2023-11-06 23:12:03,094 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:03,095 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065092938]
[2023-11-06 23:12:03,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:03,095 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:03,395 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:03,396 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251949022]
[2023-11-06 23:12:03,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:03,397 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:03,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:03,398 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:03,427 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-06 23:12:07,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:07,157 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13454 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:07,194 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:07,412 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked.
[2023-11-06 23:12:07,413 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:07,413 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:07,413 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065092938]
[2023-11-06 23:12:07,413 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:07,413 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251949022]
[2023-11-06 23:12:07,413 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [251949022] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:07,413 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:07,414 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:07,414 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590665385]
[2023-11-06 23:12:07,414 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:07,417 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:07,417 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:07,420 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:07,420 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:07,421 INFO  L87              Difference]: Start difference. First operand 4490 states and 7482 transitions. Second operand  has 7 states, 7 states have (on average 365.2857142857143) internal successors, (2557), 7 states have internal predecessors, (2557), 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)
[2023-11-06 23:12:07,721 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:07,721 INFO  L93              Difference]: Finished difference Result 12243 states and 20404 transitions.
[2023-11-06 23:12:07,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:07,722 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 365.2857142857143) internal successors, (2557), 7 states have internal predecessors, (2557), 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 2826
[2023-11-06 23:12:07,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:07,730 INFO  L225             Difference]: With dead ends: 12243
[2023-11-06 23:12:07,730 INFO  L226             Difference]: Without dead ends: 8318
[2023-11-06 23:12:07,734 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2835 GetRequests, 2823 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:07,735 INFO  L413           NwaCegarLoop]: 7353 mSDtfsCounter, 18637 mSDsluCounter, 28718 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18637 SdHoareTripleChecker+Valid, 36071 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:07,735 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18637 Valid, 36071 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:07,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8318 states.
[2023-11-06 23:12:07,797 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 4492.
[2023-11-06 23:12:07,802 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4492 states, 4491 states have (on average 1.6664439991093298) internal successors, (7484), 4491 states have internal predecessors, (7484), 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)
[2023-11-06 23:12:07,810 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 7484 transitions.
[2023-11-06 23:12:07,810 INFO  L78                 Accepts]: Start accepts. Automaton has 4492 states and 7484 transitions. Word has length 2826
[2023-11-06 23:12:07,812 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:07,812 INFO  L495      AbstractCegarLoop]: Abstraction has 4492 states and 7484 transitions.
[2023-11-06 23:12:07,813 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 365.2857142857143) internal successors, (2557), 7 states have internal predecessors, (2557), 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)
[2023-11-06 23:12:07,813 INFO  L276                IsEmpty]: Start isEmpty. Operand 4492 states and 7484 transitions.
[2023-11-06 23:12:07,871 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2828
[2023-11-06 23:12:07,871 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:07,872 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:07,921 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:08,088 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-06 23:12:08,089 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:08,089 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:08,090 INFO  L85        PathProgramCache]: Analyzing trace with hash -1996543218, now seen corresponding path program 1 times
[2023-11-06 23:12:08,090 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:08,090 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355080896]
[2023-11-06 23:12:08,090 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:08,090 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:08,339 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:08,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110819555]
[2023-11-06 23:12:08,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:08,340 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:08,340 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:08,341 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:08,342 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-06 23:12:12,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:12,189 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13457 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 23:12:12,236 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:12,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2023-11-06 23:12:12,444 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:12,444 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:12,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355080896]
[2023-11-06 23:12:12,444 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:12,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110819555]
[2023-11-06 23:12:12,445 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [110819555] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:12,445 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:12,445 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 23:12:12,446 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650579230]
[2023-11-06 23:12:12,446 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:12,448 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 23:12:12,448 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:12,451 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 23:12:12,451 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 23:12:12,452 INFO  L87              Difference]: Start difference. First operand 4492 states and 7484 transitions. Second operand  has 8 states, 8 states have (on average 320.0) internal successors, (2560), 8 states have internal predecessors, (2560), 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)
[2023-11-06 23:12:12,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:12,825 INFO  L93              Difference]: Finished difference Result 12249 states and 20410 transitions.
[2023-11-06 23:12:12,825 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:12,826 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 320.0) internal successors, (2560), 8 states have internal predecessors, (2560), 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 2827
[2023-11-06 23:12:12,829 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:12,836 INFO  L225             Difference]: With dead ends: 12249
[2023-11-06 23:12:12,836 INFO  L226             Difference]: Without dead ends: 8319
[2023-11-06 23:12:12,840 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2836 GetRequests, 2823 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 23:12:12,840 INFO  L413           NwaCegarLoop]: 7348 mSDtfsCounter, 18636 mSDsluCounter, 35061 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18636 SdHoareTripleChecker+Valid, 42409 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:12,841 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18636 Valid, 42409 Invalid, 53 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:12,848 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8319 states.
[2023-11-06 23:12:12,908 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8319 to 4494.
[2023-11-06 23:12:12,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4494 states, 4493 states have (on average 1.6661473403071445) internal successors, (7486), 4493 states have internal predecessors, (7486), 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)
[2023-11-06 23:12:12,921 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4494 states to 4494 states and 7486 transitions.
[2023-11-06 23:12:12,921 INFO  L78                 Accepts]: Start accepts. Automaton has 4494 states and 7486 transitions. Word has length 2827
[2023-11-06 23:12:12,923 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:12,923 INFO  L495      AbstractCegarLoop]: Abstraction has 4494 states and 7486 transitions.
[2023-11-06 23:12:12,924 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 320.0) internal successors, (2560), 8 states have internal predecessors, (2560), 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)
[2023-11-06 23:12:12,924 INFO  L276                IsEmpty]: Start isEmpty. Operand 4494 states and 7486 transitions.
[2023-11-06 23:12:12,982 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2829
[2023-11-06 23:12:12,983 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:12,984 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:13,027 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:13,202 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-06 23:12:13,202 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:13,203 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:13,203 INFO  L85        PathProgramCache]: Analyzing trace with hash -1333880114, now seen corresponding path program 1 times
[2023-11-06 23:12:13,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:13,204 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898816268]
[2023-11-06 23:12:13,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:13,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:13,532 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:13,532 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556342683]
[2023-11-06 23:12:13,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:13,533 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:13,533 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:13,534 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:13,535 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-06 23:12:17,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:17,267 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13461 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:17,298 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:17,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked.
[2023-11-06 23:12:17,509 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:17,509 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:17,509 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898816268]
[2023-11-06 23:12:17,509 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:17,509 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556342683]
[2023-11-06 23:12:17,510 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556342683] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:17,510 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:17,510 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:17,511 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899285802]
[2023-11-06 23:12:17,511 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:17,513 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:17,513 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:17,516 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:17,516 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:17,517 INFO  L87              Difference]: Start difference. First operand 4494 states and 7486 transitions. Second operand  has 7 states, 7 states have (on average 366.14285714285717) internal successors, (2563), 7 states have internal predecessors, (2563), 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)
[2023-11-06 23:12:17,845 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:17,845 INFO  L93              Difference]: Finished difference Result 12255 states and 20416 transitions.
[2023-11-06 23:12:17,846 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:17,846 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 366.14285714285717) internal successors, (2563), 7 states have internal predecessors, (2563), 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 2828
[2023-11-06 23:12:17,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:17,856 INFO  L225             Difference]: With dead ends: 12255
[2023-11-06 23:12:17,856 INFO  L226             Difference]: Without dead ends: 8320
[2023-11-06 23:12:17,860 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2837 GetRequests, 2825 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:17,861 INFO  L413           NwaCegarLoop]: 7343 mSDtfsCounter, 18635 mSDsluCounter, 28688 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18635 SdHoareTripleChecker+Valid, 36031 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:17,862 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18635 Valid, 36031 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:17,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8320 states.
[2023-11-06 23:12:17,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 4496.
[2023-11-06 23:12:17,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4496 states, 4495 states have (on average 1.6658509454949944) internal successors, (7488), 4495 states have internal predecessors, (7488), 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)
[2023-11-06 23:12:17,938 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 7488 transitions.
[2023-11-06 23:12:17,938 INFO  L78                 Accepts]: Start accepts. Automaton has 4496 states and 7488 transitions. Word has length 2828
[2023-11-06 23:12:17,940 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:17,940 INFO  L495      AbstractCegarLoop]: Abstraction has 4496 states and 7488 transitions.
[2023-11-06 23:12:17,941 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 366.14285714285717) internal successors, (2563), 7 states have internal predecessors, (2563), 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)
[2023-11-06 23:12:17,941 INFO  L276                IsEmpty]: Start isEmpty. Operand 4496 states and 7488 transitions.
[2023-11-06 23:12:17,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2830
[2023-11-06 23:12:18,000 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:18,001 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:18,045 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:18,228 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-06 23:12:18,229 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:18,229 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:18,229 INFO  L85        PathProgramCache]: Analyzing trace with hash 1264935158, now seen corresponding path program 1 times
[2023-11-06 23:12:18,230 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:18,230 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856054417]
[2023-11-06 23:12:18,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:18,230 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:18,520 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:18,520 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842077480]
[2023-11-06 23:12:18,521 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:18,521 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:18,521 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:18,526 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:18,548 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-06 23:12:22,190 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:22,274 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13464 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:22,305 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:22,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2023-11-06 23:12:22,505 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:22,505 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:22,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856054417]
[2023-11-06 23:12:22,505 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:22,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842077480]
[2023-11-06 23:12:22,505 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [842077480] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:22,505 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:22,506 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:22,506 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552449638]
[2023-11-06 23:12:22,506 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:22,509 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:22,509 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:22,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:22,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:22,512 INFO  L87              Difference]: Start difference. First operand 4496 states and 7488 transitions. Second operand  has 7 states, 7 states have (on average 366.57142857142856) internal successors, (2566), 7 states have internal predecessors, (2566), 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)
[2023-11-06 23:12:22,817 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:22,817 INFO  L93              Difference]: Finished difference Result 12261 states and 20422 transitions.
[2023-11-06 23:12:22,817 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:22,818 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 366.57142857142856) internal successors, (2566), 7 states have internal predecessors, (2566), 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 2829
[2023-11-06 23:12:22,820 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:22,827 INFO  L225             Difference]: With dead ends: 12261
[2023-11-06 23:12:22,827 INFO  L226             Difference]: Without dead ends: 8321
[2023-11-06 23:12:22,831 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2838 GetRequests, 2826 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:22,832 INFO  L413           NwaCegarLoop]: 7338 mSDtfsCounter, 18634 mSDsluCounter, 28673 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18634 SdHoareTripleChecker+Valid, 36011 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:22,832 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18634 Valid, 36011 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:22,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8321 states.
[2023-11-06 23:12:22,890 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8321 to 4498.
[2023-11-06 23:12:22,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4498 states, 4497 states have (on average 1.6655548143206582) internal successors, (7490), 4497 states have internal predecessors, (7490), 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)
[2023-11-06 23:12:22,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 7490 transitions.
[2023-11-06 23:12:22,900 INFO  L78                 Accepts]: Start accepts. Automaton has 4498 states and 7490 transitions. Word has length 2829
[2023-11-06 23:12:22,902 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:22,902 INFO  L495      AbstractCegarLoop]: Abstraction has 4498 states and 7490 transitions.
[2023-11-06 23:12:22,903 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 366.57142857142856) internal successors, (2566), 7 states have internal predecessors, (2566), 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)
[2023-11-06 23:12:22,903 INFO  L276                IsEmpty]: Start isEmpty. Operand 4498 states and 7490 transitions.
[2023-11-06 23:12:22,940 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2831
[2023-11-06 23:12:22,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:22,941 INFO  L195           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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:12:22,989 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:23,164 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:23,165 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:23,165 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:23,166 INFO  L85        PathProgramCache]: Analyzing trace with hash 1065511144, now seen corresponding path program 1 times
[2023-11-06 23:12:23,166 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:23,166 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428821796]
[2023-11-06 23:12:23,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:23,167 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:23,431 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:23,431 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849531397]
[2023-11-06 23:12:23,432 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:23,432 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:23,432 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:23,433 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:23,435 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-06 23:12:27,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:27,316 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13467 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:27,351 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:27,534 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked.
[2023-11-06 23:12:27,534 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:27,535 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:27,535 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428821796]
[2023-11-06 23:12:27,535 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:27,535 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849531397]
[2023-11-06 23:12:27,535 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [849531397] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:27,535 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:27,536 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:27,536 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847648053]
[2023-11-06 23:12:27,536 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:27,538 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:27,538 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:27,539 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:27,539 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:27,540 INFO  L87              Difference]: Start difference. First operand 4498 states and 7490 transitions. Second operand  has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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)
[2023-11-06 23:12:27,842 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:27,842 INFO  L93              Difference]: Finished difference Result 12267 states and 20428 transitions.
[2023-11-06 23:12:27,843 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:27,843 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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 2830
[2023-11-06 23:12:27,845 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:27,852 INFO  L225             Difference]: With dead ends: 12267
[2023-11-06 23:12:27,852 INFO  L226             Difference]: Without dead ends: 8322
[2023-11-06 23:12:27,856 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2839 GetRequests, 2827 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:27,856 INFO  L413           NwaCegarLoop]: 7333 mSDtfsCounter, 18633 mSDsluCounter, 28658 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18633 SdHoareTripleChecker+Valid, 35991 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:27,857 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18633 Valid, 35991 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:27,865 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8322 states.
[2023-11-06 23:12:27,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 4500.
[2023-11-06 23:12:27,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4500 states, 4499 states have (on average 1.6652589464325405) internal successors, (7492), 4499 states have internal predecessors, (7492), 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)
[2023-11-06 23:12:27,919 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 7492 transitions.
[2023-11-06 23:12:27,919 INFO  L78                 Accepts]: Start accepts. Automaton has 4500 states and 7492 transitions. Word has length 2830
[2023-11-06 23:12:27,920 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:27,920 INFO  L495      AbstractCegarLoop]: Abstraction has 4500 states and 7492 transitions.
[2023-11-06 23:12:27,921 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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)
[2023-11-06 23:12:27,921 INFO  L276                IsEmpty]: Start isEmpty. Operand 4500 states and 7492 transitions.
[2023-11-06 23:12:27,978 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2832
[2023-11-06 23:12:27,978 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:27,980 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:28,027 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:28,208 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:28,209 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:28,209 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:28,209 INFO  L85        PathProgramCache]: Analyzing trace with hash -316766244, now seen corresponding path program 1 times
[2023-11-06 23:12:28,209 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:28,210 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077914745]
[2023-11-06 23:12:28,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:28,210 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:28,465 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:28,465 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989223063]
[2023-11-06 23:12:28,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:28,466 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:28,466 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:28,467 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:28,468 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-06 23:12:32,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:32,200 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13470 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:32,231 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:32,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked.
[2023-11-06 23:12:32,415 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:32,415 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:32,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077914745]
[2023-11-06 23:12:32,415 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:32,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989223063]
[2023-11-06 23:12:32,415 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [989223063] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:32,415 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:32,416 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:32,416 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873894308]
[2023-11-06 23:12:32,416 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:32,418 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:32,418 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:32,421 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:32,421 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:32,422 INFO  L87              Difference]: Start difference. First operand 4500 states and 7492 transitions. Second operand  has 7 states, 7 states have (on average 367.42857142857144) internal successors, (2572), 7 states have internal predecessors, (2572), 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)
[2023-11-06 23:12:32,723 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:32,723 INFO  L93              Difference]: Finished difference Result 12273 states and 20434 transitions.
[2023-11-06 23:12:32,723 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:32,724 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 367.42857142857144) internal successors, (2572), 7 states have internal predecessors, (2572), 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 2831
[2023-11-06 23:12:32,726 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:32,732 INFO  L225             Difference]: With dead ends: 12273
[2023-11-06 23:12:32,732 INFO  L226             Difference]: Without dead ends: 8323
[2023-11-06 23:12:32,736 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2840 GetRequests, 2828 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:32,736 INFO  L413           NwaCegarLoop]: 7328 mSDtfsCounter, 18632 mSDsluCounter, 28643 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18632 SdHoareTripleChecker+Valid, 35971 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:32,737 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18632 Valid, 35971 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:32,744 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8323 states.
[2023-11-06 23:12:32,784 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8323 to 4502.
[2023-11-06 23:12:32,788 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4502 states, 4501 states have (on average 1.6649633414796712) internal successors, (7494), 4501 states have internal predecessors, (7494), 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)
[2023-11-06 23:12:32,793 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 7494 transitions.
[2023-11-06 23:12:32,793 INFO  L78                 Accepts]: Start accepts. Automaton has 4502 states and 7494 transitions. Word has length 2831
[2023-11-06 23:12:32,795 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:32,795 INFO  L495      AbstractCegarLoop]: Abstraction has 4502 states and 7494 transitions.
[2023-11-06 23:12:32,795 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 367.42857142857144) internal successors, (2572), 7 states have internal predecessors, (2572), 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)
[2023-11-06 23:12:32,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 4502 states and 7494 transitions.
[2023-11-06 23:12:32,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2833
[2023-11-06 23:12:32,836 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:32,837 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:32,885 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:33,052 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:33,053 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:33,053 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:33,054 INFO  L85        PathProgramCache]: Analyzing trace with hash -1635753212, now seen corresponding path program 1 times
[2023-11-06 23:12:33,054 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:33,054 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21113990]
[2023-11-06 23:12:33,055 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:33,055 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:33,311 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:33,311 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863662150]
[2023-11-06 23:12:33,311 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:33,312 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:33,312 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:33,312 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:33,314 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-06 23:12:37,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:37,127 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13474 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:37,169 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:37,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2023-11-06 23:12:37,355 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:37,356 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:37,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21113990]
[2023-11-06 23:12:37,356 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:37,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863662150]
[2023-11-06 23:12:37,356 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [863662150] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:37,356 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:37,357 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:37,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301814316]
[2023-11-06 23:12:37,357 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:37,359 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:37,359 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:37,361 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:37,361 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:37,361 INFO  L87              Difference]: Start difference. First operand 4502 states and 7494 transitions. Second operand  has 7 states, 7 states have (on average 367.85714285714283) internal successors, (2575), 7 states have internal predecessors, (2575), 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)
[2023-11-06 23:12:37,686 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:37,686 INFO  L93              Difference]: Finished difference Result 12279 states and 20440 transitions.
[2023-11-06 23:12:37,687 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:37,687 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 367.85714285714283) internal successors, (2575), 7 states have internal predecessors, (2575), 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 2832
[2023-11-06 23:12:37,689 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:37,696 INFO  L225             Difference]: With dead ends: 12279
[2023-11-06 23:12:37,696 INFO  L226             Difference]: Without dead ends: 8324
[2023-11-06 23:12:37,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2829 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:37,700 INFO  L413           NwaCegarLoop]: 7323 mSDtfsCounter, 18631 mSDsluCounter, 28628 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18631 SdHoareTripleChecker+Valid, 35951 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:37,700 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18631 Valid, 35951 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:37,707 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8324 states.
[2023-11-06 23:12:37,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8324 to 4504.
[2023-11-06 23:12:37,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4504 states, 4503 states have (on average 1.6646679991117033) internal successors, (7496), 4503 states have internal predecessors, (7496), 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)
[2023-11-06 23:12:37,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 7496 transitions.
[2023-11-06 23:12:37,756 INFO  L78                 Accepts]: Start accepts. Automaton has 4504 states and 7496 transitions. Word has length 2832
[2023-11-06 23:12:37,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:37,757 INFO  L495      AbstractCegarLoop]: Abstraction has 4504 states and 7496 transitions.
[2023-11-06 23:12:37,758 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 367.85714285714283) internal successors, (2575), 7 states have internal predecessors, (2575), 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)
[2023-11-06 23:12:37,758 INFO  L276                IsEmpty]: Start isEmpty. Operand 4504 states and 7496 transitions.
[2023-11-06 23:12:37,794 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2834
[2023-11-06 23:12:37,795 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:37,795 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:37,833 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:37,996 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32
[2023-11-06 23:12:37,997 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:37,997 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:37,998 INFO  L85        PathProgramCache]: Analyzing trace with hash 1461489348, now seen corresponding path program 1 times
[2023-11-06 23:12:37,998 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:37,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326771703]
[2023-11-06 23:12:37,998 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:37,999 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:38,312 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:38,313 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038100809]
[2023-11-06 23:12:38,313 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:38,314 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:38,314 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:38,317 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:38,336 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-06 23:12:42,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:42,219 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13477 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:42,257 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:42,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked.
[2023-11-06 23:12:42,442 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:42,442 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:42,442 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326771703]
[2023-11-06 23:12:42,443 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:42,443 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038100809]
[2023-11-06 23:12:42,443 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038100809] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:42,443 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:42,444 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:42,444 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629368312]
[2023-11-06 23:12:42,444 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:42,446 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:42,446 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:42,448 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:42,448 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:42,449 INFO  L87              Difference]: Start difference. First operand 4504 states and 7496 transitions. Second operand  has 7 states, 7 states have (on average 368.2857142857143) internal successors, (2578), 7 states have internal predecessors, (2578), 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)
[2023-11-06 23:12:42,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:42,755 INFO  L93              Difference]: Finished difference Result 12285 states and 20446 transitions.
[2023-11-06 23:12:42,756 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:42,756 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 368.2857142857143) internal successors, (2578), 7 states have internal predecessors, (2578), 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 2833
[2023-11-06 23:12:42,758 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:42,765 INFO  L225             Difference]: With dead ends: 12285
[2023-11-06 23:12:42,765 INFO  L226             Difference]: Without dead ends: 8325
[2023-11-06 23:12:42,768 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2842 GetRequests, 2830 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:42,769 INFO  L413           NwaCegarLoop]: 7318 mSDtfsCounter, 18630 mSDsluCounter, 28613 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18630 SdHoareTripleChecker+Valid, 35931 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:42,769 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18630 Valid, 35931 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:42,777 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8325 states.
[2023-11-06 23:12:42,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 4506.
[2023-11-06 23:12:42,820 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4506 states, 4505 states have (on average 1.6643729189789123) internal successors, (7498), 4505 states have internal predecessors, (7498), 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)
[2023-11-06 23:12:42,826 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 7498 transitions.
[2023-11-06 23:12:42,826 INFO  L78                 Accepts]: Start accepts. Automaton has 4506 states and 7498 transitions. Word has length 2833
[2023-11-06 23:12:42,827 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:42,827 INFO  L495      AbstractCegarLoop]: Abstraction has 4506 states and 7498 transitions.
[2023-11-06 23:12:42,828 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 368.2857142857143) internal successors, (2578), 7 states have internal predecessors, (2578), 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)
[2023-11-06 23:12:42,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 4506 states and 7498 transitions.
[2023-11-06 23:12:42,863 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2835
[2023-11-06 23:12:42,863 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:42,864 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:42,904 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:43,064 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-06 23:12:43,065 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:43,065 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:43,066 INFO  L85        PathProgramCache]: Analyzing trace with hash -801501922, now seen corresponding path program 1 times
[2023-11-06 23:12:43,066 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:43,066 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174234050]
[2023-11-06 23:12:43,067 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:43,067 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:43,415 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:43,415 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444049628]
[2023-11-06 23:12:43,415 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:43,416 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:43,416 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:43,417 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:43,418 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-06 23:12:47,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:47,205 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13480 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:47,240 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:47,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked.
[2023-11-06 23:12:47,427 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:47,428 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:47,428 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174234050]
[2023-11-06 23:12:47,428 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:47,428 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444049628]
[2023-11-06 23:12:47,428 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [444049628] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:47,428 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:47,429 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:47,429 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711471986]
[2023-11-06 23:12:47,429 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:47,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:47,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:47,433 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:47,433 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:47,434 INFO  L87              Difference]: Start difference. First operand 4506 states and 7498 transitions. Second operand  has 7 states, 7 states have (on average 368.7142857142857) internal successors, (2581), 7 states have internal predecessors, (2581), 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)
[2023-11-06 23:12:47,769 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:47,769 INFO  L93              Difference]: Finished difference Result 12291 states and 20452 transitions.
[2023-11-06 23:12:47,770 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:47,770 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 368.7142857142857) internal successors, (2581), 7 states have internal predecessors, (2581), 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 2834
[2023-11-06 23:12:47,772 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:47,778 INFO  L225             Difference]: With dead ends: 12291
[2023-11-06 23:12:47,779 INFO  L226             Difference]: Without dead ends: 8326
[2023-11-06 23:12:47,782 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2843 GetRequests, 2831 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:47,783 INFO  L413           NwaCegarLoop]: 7313 mSDtfsCounter, 18629 mSDsluCounter, 28598 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18629 SdHoareTripleChecker+Valid, 35911 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:47,783 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18629 Valid, 35911 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:47,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8326 states.
[2023-11-06 23:12:47,835 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 4508.
[2023-11-06 23:12:47,839 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4508 states, 4507 states have (on average 1.6640781007321943) internal successors, (7500), 4507 states have internal predecessors, (7500), 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)
[2023-11-06 23:12:47,846 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 7500 transitions.
[2023-11-06 23:12:47,846 INFO  L78                 Accepts]: Start accepts. Automaton has 4508 states and 7500 transitions. Word has length 2834
[2023-11-06 23:12:47,847 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:47,847 INFO  L495      AbstractCegarLoop]: Abstraction has 4508 states and 7500 transitions.
[2023-11-06 23:12:47,848 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 368.7142857142857) internal successors, (2581), 7 states have internal predecessors, (2581), 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)
[2023-11-06 23:12:47,848 INFO  L276                IsEmpty]: Start isEmpty. Operand 4508 states and 7500 transitions.
[2023-11-06 23:12:47,893 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2836
[2023-11-06 23:12:47,893 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:47,893 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:47,928 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:48,096 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-06 23:12:48,097 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:48,097 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:48,098 INFO  L85        PathProgramCache]: Analyzing trace with hash 1457437098, now seen corresponding path program 1 times
[2023-11-06 23:12:48,098 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:48,099 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690440519]
[2023-11-06 23:12:48,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:48,100 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:48,401 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:48,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015876954]
[2023-11-06 23:12:48,402 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:48,402 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:48,403 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:48,404 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:48,408 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-06 23:12:52,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:52,242 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13483 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 23:12:52,276 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:52,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked.
[2023-11-06 23:12:52,484 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:52,485 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:52,485 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690440519]
[2023-11-06 23:12:52,485 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:52,485 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015876954]
[2023-11-06 23:12:52,485 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015876954] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:52,485 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:52,486 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 23:12:52,486 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793569456]
[2023-11-06 23:12:52,486 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:52,488 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 23:12:52,488 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:52,489 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 23:12:52,490 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 23:12:52,490 INFO  L87              Difference]: Start difference. First operand 4508 states and 7500 transitions. Second operand  has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 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)
[2023-11-06 23:12:52,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:52,846 INFO  L93              Difference]: Finished difference Result 12297 states and 20458 transitions.
[2023-11-06 23:12:52,846 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:52,847 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 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 2835
[2023-11-06 23:12:52,849 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:52,855 INFO  L225             Difference]: With dead ends: 12297
[2023-11-06 23:12:52,855 INFO  L226             Difference]: Without dead ends: 8327
[2023-11-06 23:12:52,859 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2844 GetRequests, 2831 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 23:12:52,859 INFO  L413           NwaCegarLoop]: 7308 mSDtfsCounter, 18628 mSDsluCounter, 35887 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18628 SdHoareTripleChecker+Valid, 43195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:52,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18628 Valid, 43195 Invalid, 58 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:52,866 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8327 states.
[2023-11-06 23:12:52,908 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 4510.
[2023-11-06 23:12:52,912 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4510 states, 4509 states have (on average 1.663783544023065) internal successors, (7502), 4509 states have internal predecessors, (7502), 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)
[2023-11-06 23:12:52,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 7502 transitions.
[2023-11-06 23:12:52,918 INFO  L78                 Accepts]: Start accepts. Automaton has 4510 states and 7502 transitions. Word has length 2835
[2023-11-06 23:12:52,919 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:52,919 INFO  L495      AbstractCegarLoop]: Abstraction has 4510 states and 7502 transitions.
[2023-11-06 23:12:52,919 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 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)
[2023-11-06 23:12:52,920 INFO  L276                IsEmpty]: Start isEmpty. Operand 4510 states and 7502 transitions.
[2023-11-06 23:12:52,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2837
[2023-11-06 23:12:52,956 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:52,956 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:52,992 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:53,157 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-06 23:12:53,157 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:53,157 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:53,158 INFO  L85        PathProgramCache]: Analyzing trace with hash 315699258, now seen corresponding path program 1 times
[2023-11-06 23:12:53,158 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:53,158 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808064784]
[2023-11-06 23:12:53,159 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:53,159 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:53,436 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:53,436 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447984076]
[2023-11-06 23:12:53,437 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:53,437 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:53,438 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:53,439 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:53,444 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-06 23:12:57,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:57,320 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13487 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:12:57,353 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:57,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked.
[2023-11-06 23:12:57,549 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:57,549 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:57,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808064784]
[2023-11-06 23:12:57,549 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:57,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447984076]
[2023-11-06 23:12:57,549 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447984076] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:57,549 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:57,550 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:12:57,550 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567935664]
[2023-11-06 23:12:57,550 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:57,552 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:12:57,552 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:57,554 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:12:57,554 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:57,554 INFO  L87              Difference]: Start difference. First operand 4510 states and 7502 transitions. Second operand  has 7 states, 7 states have (on average 369.57142857142856) internal successors, (2587), 7 states have internal predecessors, (2587), 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)
[2023-11-06 23:12:57,877 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:57,878 INFO  L93              Difference]: Finished difference Result 12303 states and 20464 transitions.
[2023-11-06 23:12:57,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:12:57,879 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 369.57142857142856) internal successors, (2587), 7 states have internal predecessors, (2587), 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 2836
[2023-11-06 23:12:57,880 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:57,887 INFO  L225             Difference]: With dead ends: 12303
[2023-11-06 23:12:57,887 INFO  L226             Difference]: Without dead ends: 8328
[2023-11-06 23:12:57,891 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2845 GetRequests, 2833 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:12:57,891 INFO  L413           NwaCegarLoop]: 7303 mSDtfsCounter, 18627 mSDsluCounter, 28568 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18627 SdHoareTripleChecker+Valid, 35871 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:57,891 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18627 Valid, 35871 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:57,897 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8328 states.
[2023-11-06 23:12:57,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 4512.
[2023-11-06 23:12:57,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4512 states, 4511 states have (on average 1.6634892485036576) internal successors, (7504), 4511 states have internal predecessors, (7504), 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)
[2023-11-06 23:12:57,946 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 7504 transitions.
[2023-11-06 23:12:57,947 INFO  L78                 Accepts]: Start accepts. Automaton has 4512 states and 7504 transitions. Word has length 2836
[2023-11-06 23:12:57,948 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:57,948 INFO  L495      AbstractCegarLoop]: Abstraction has 4512 states and 7504 transitions.
[2023-11-06 23:12:57,949 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 369.57142857142856) internal successors, (2587), 7 states have internal predecessors, (2587), 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)
[2023-11-06 23:12:57,949 INFO  L276                IsEmpty]: Start isEmpty. Operand 4512 states and 7504 transitions.
[2023-11-06 23:12:57,991 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2838
[2023-11-06 23:12:57,991 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:57,992 INFO  L195           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, 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, 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, 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[2023-11-06 23:12:58,028 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:58,192 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-06 23:12:58,193 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:58,193 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:58,194 INFO  L85        PathProgramCache]: Analyzing trace with hash 230986130, now seen corresponding path program 1 times
[2023-11-06 23:12:58,194 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:58,194 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91651536]
[2023-11-06 23:12:58,194 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:58,195 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:58,442 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:58,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320338682]
[2023-11-06 23:12:58,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:58,443 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:58,443 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:58,444 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:58,446 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-06 23:13:02,049 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:02,128 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13490 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:13:02,157 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:02,340 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked.
[2023-11-06 23:13:02,340 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:02,341 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:02,341 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91651536]
[2023-11-06 23:13:02,341 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:02,341 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320338682]
[2023-11-06 23:13:02,341 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [320338682] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:02,341 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:02,342 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:13:02,342 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226317670]
[2023-11-06 23:13:02,343 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:02,344 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:13:02,345 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:02,347 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:13:02,347 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:13:02,348 INFO  L87              Difference]: Start difference. First operand 4512 states and 7504 transitions. Second operand  has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 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)
[2023-11-06 23:13:02,676 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:02,676 INFO  L93              Difference]: Finished difference Result 12309 states and 20470 transitions.
[2023-11-06 23:13:02,676 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:13:02,677 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 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 2837
[2023-11-06 23:13:02,679 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:02,685 INFO  L225             Difference]: With dead ends: 12309
[2023-11-06 23:13:02,685 INFO  L226             Difference]: Without dead ends: 8329
[2023-11-06 23:13:02,689 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2846 GetRequests, 2834 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:13:02,689 INFO  L413           NwaCegarLoop]: 7298 mSDtfsCounter, 18626 mSDsluCounter, 28553 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18626 SdHoareTripleChecker+Valid, 35851 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:02,690 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18626 Valid, 35851 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:13:02,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8329 states.
[2023-11-06 23:13:02,740 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8329 to 4514.
[2023-11-06 23:13:02,743 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4514 states, 4513 states have (on average 1.6631952138267228) internal successors, (7506), 4513 states have internal predecessors, (7506), 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)
[2023-11-06 23:13:02,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 7506 transitions.
[2023-11-06 23:13:02,748 INFO  L78                 Accepts]: Start accepts. Automaton has 4514 states and 7506 transitions. Word has length 2837
[2023-11-06 23:13:02,750 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:02,750 INFO  L495      AbstractCegarLoop]: Abstraction has 4514 states and 7506 transitions.
[2023-11-06 23:13:02,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 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)
[2023-11-06 23:13:02,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 4514 states and 7506 transitions.
[2023-11-06 23:13:02,785 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2839
[2023-11-06 23:13:02,785 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:02,786 INFO  L195           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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:13:02,822 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:02,986 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-06 23:13:02,987 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:02,987 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:02,988 INFO  L85        PathProgramCache]: Analyzing trace with hash -1308281260, now seen corresponding path program 1 times
[2023-11-06 23:13:02,988 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:02,988 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983832282]
[2023-11-06 23:13:02,989 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:02,989 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:03,246 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:03,246 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002816394]
[2023-11-06 23:13:03,247 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:03,247 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:03,247 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:03,248 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:03,272 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-06 23:13:06,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:06,925 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13493 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:13:06,954 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:07,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked.
[2023-11-06 23:13:07,139 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:07,139 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:07,140 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983832282]
[2023-11-06 23:13:07,140 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:07,140 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002816394]
[2023-11-06 23:13:07,140 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002816394] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:07,140 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:07,140 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:13:07,141 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081013533]
[2023-11-06 23:13:07,141 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:07,142 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:13:07,142 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:07,144 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:13:07,144 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:13:07,145 INFO  L87              Difference]: Start difference. First operand 4514 states and 7506 transitions. Second operand  has 7 states, 7 states have (on average 370.42857142857144) internal successors, (2593), 7 states have internal predecessors, (2593), 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)
[2023-11-06 23:13:07,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:07,444 INFO  L93              Difference]: Finished difference Result 12315 states and 20476 transitions.
[2023-11-06 23:13:07,445 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:13:07,445 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 370.42857142857144) internal successors, (2593), 7 states have internal predecessors, (2593), 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 2838
[2023-11-06 23:13:07,447 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:07,453 INFO  L225             Difference]: With dead ends: 12315
[2023-11-06 23:13:07,453 INFO  L226             Difference]: Without dead ends: 8330
[2023-11-06 23:13:07,457 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2847 GetRequests, 2835 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:13:07,457 INFO  L413           NwaCegarLoop]: 7293 mSDtfsCounter, 18625 mSDsluCounter, 28538 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18625 SdHoareTripleChecker+Valid, 35831 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:07,458 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18625 Valid, 35831 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:13:07,464 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8330 states.
[2023-11-06 23:13:07,503 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8330 to 4516.
[2023-11-06 23:13:07,506 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4516 states, 4515 states have (on average 1.6629014396456256) internal successors, (7508), 4515 states have internal predecessors, (7508), 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)
[2023-11-06 23:13:07,512 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 7508 transitions.
[2023-11-06 23:13:07,512 INFO  L78                 Accepts]: Start accepts. Automaton has 4516 states and 7508 transitions. Word has length 2838
[2023-11-06 23:13:07,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:07,513 INFO  L495      AbstractCegarLoop]: Abstraction has 4516 states and 7508 transitions.
[2023-11-06 23:13:07,514 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 370.42857142857144) internal successors, (2593), 7 states have internal predecessors, (2593), 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)
[2023-11-06 23:13:07,514 INFO  L276                IsEmpty]: Start isEmpty. Operand 4516 states and 7508 transitions.
[2023-11-06 23:13:07,549 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2840
[2023-11-06 23:13:07,549 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:07,550 INFO  L195           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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:13:07,585 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:07,750 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2023-11-06 23:13:07,750 INFO  L420      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:07,751 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:07,751 INFO  L85        PathProgramCache]: Analyzing trace with hash 793460856, now seen corresponding path program 1 times
[2023-11-06 23:13:07,751 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:07,751 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007840154]
[2023-11-06 23:13:07,752 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:07,752 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:07,998 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:07,999 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434995186]
[2023-11-06 23:13:07,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:07,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:07,999 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:08,000 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:08,001 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-06 23:13:11,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:11,741 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13496 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:13:11,771 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:11,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked.
[2023-11-06 23:13:11,950 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:11,950 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:11,950 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007840154]
[2023-11-06 23:13:11,950 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:11,950 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434995186]
[2023-11-06 23:13:11,951 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [434995186] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:11,951 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:11,951 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:13:11,952 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547978953]
[2023-11-06 23:13:11,952 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:11,953 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:13:11,953 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:11,955 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:13:11,955 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:13:11,956 INFO  L87              Difference]: Start difference. First operand 4516 states and 7508 transitions. Second operand  has 7 states, 7 states have (on average 370.85714285714283) internal successors, (2596), 7 states have internal predecessors, (2596), 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)
[2023-11-06 23:13:12,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:12,250 INFO  L93              Difference]: Finished difference Result 12321 states and 20482 transitions.
[2023-11-06 23:13:12,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:13:12,251 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 370.85714285714283) internal successors, (2596), 7 states have internal predecessors, (2596), 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 2839
[2023-11-06 23:13:12,253 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:12,260 INFO  L225             Difference]: With dead ends: 12321
[2023-11-06 23:13:12,260 INFO  L226             Difference]: Without dead ends: 8331
[2023-11-06 23:13:12,264 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2848 GetRequests, 2836 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:13:12,264 INFO  L413           NwaCegarLoop]: 7288 mSDtfsCounter, 18624 mSDsluCounter, 28523 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18624 SdHoareTripleChecker+Valid, 35811 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:12,264 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18624 Valid, 35811 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:13:12,270 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8331 states.
[2023-11-06 23:13:12,310 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 4518.
[2023-11-06 23:13:12,313 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4518 states, 4517 states have (on average 1.6626079256143458) internal successors, (7510), 4517 states have internal predecessors, (7510), 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)
[2023-11-06 23:13:12,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 7510 transitions.
[2023-11-06 23:13:12,319 INFO  L78                 Accepts]: Start accepts. Automaton has 4518 states and 7510 transitions. Word has length 2839
[2023-11-06 23:13:12,320 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:12,320 INFO  L495      AbstractCegarLoop]: Abstraction has 4518 states and 7510 transitions.
[2023-11-06 23:13:12,320 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 370.85714285714283) internal successors, (2596), 7 states have internal predecessors, (2596), 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)
[2023-11-06 23:13:12,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 4518 states and 7510 transitions.
[2023-11-06 23:13:12,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2841
[2023-11-06 23:13:12,355 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:12,356 INFO  L195           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, 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, 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, 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[2023-11-06 23:13:12,393 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:12,557 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39
[2023-11-06 23:13:12,557 INFO  L420      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:12,557 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:12,558 INFO  L85        PathProgramCache]: Analyzing trace with hash 1573814896, now seen corresponding path program 1 times
[2023-11-06 23:13:12,558 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:12,558 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431489706]
[2023-11-06 23:13:12,559 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:12,559 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:12,816 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:12,817 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159816280]
[2023-11-06 23:13:12,817 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:12,817 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:12,817 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:12,818 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:12,820 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_476966a8-d274-4eae-8c1b-b64137ed476b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2023-11-06 23:13:16,397 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:16,477 INFO  L262         TraceCheckSpWp]: Trace formula consists of 13500 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 23:13:16,506 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:16,685 INFO  L134       CoverageAnalysis]: Checked inductivity of 308 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2023-11-06 23:13:16,686 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:16,686 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:16,686 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431489706]
[2023-11-06 23:13:16,686 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:16,686 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159816280]
[2023-11-06 23:13:16,687 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [159816280] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:16,687 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:16,687 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:13:16,688 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841430517]
[2023-11-06 23:13:16,688 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:16,690 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:13:16,690 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:16,692 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:13:16,692 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:13:16,693 INFO  L87              Difference]: Start difference. First operand 4518 states and 7510 transitions. Second operand  has 7 states, 7 states have (on average 371.2857142857143) internal successors, (2599), 7 states have internal predecessors, (2599), 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)
[2023-11-06 23:13:16,990 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:16,990 INFO  L93              Difference]: Finished difference Result 12327 states and 20488 transitions.
[2023-11-06 23:13:16,990 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 23:13:16,991 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 371.2857142857143) internal successors, (2599), 7 states have internal predecessors, (2599), 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 2840
[2023-11-06 23:13:16,993 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:16,999 INFO  L225             Difference]: With dead ends: 12327
[2023-11-06 23:13:16,999 INFO  L226             Difference]: Without dead ends: 8332
[2023-11-06 23:13:17,002 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2849 GetRequests, 2837 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:13:17,003 INFO  L413           NwaCegarLoop]: 7283 mSDtfsCounter, 18623 mSDsluCounter, 28508 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18623 SdHoareTripleChecker+Valid, 35791 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:17,003 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18623 Valid, 35791 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:13:17,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8332 states.
[2023-11-06 23:13:17,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 4520.
[2023-11-06 23:13:17,053 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4520 states, 4519 states have (on average 1.662314671387475) internal successors, (7512), 4519 states have internal predecessors, (7512), 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)
[2023-11-06 23:13:17,058 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 7512 transitions.
[2023-11-06 23:13:17,058 INFO  L78                 Accepts]: Start accepts. Automaton has 4520 states and 7512 transitions. Word has length 2840
[2023-11-06 23:13:17,060 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:17,060 INFO  L495      AbstractCegarLoop]: Abstraction has 4520 states and 7512 transitions.
[2023-11-06 23:13:17,060 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 371.2857142857143) internal successors, (2599), 7 states have internal predecessors, (2599), 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)
[2023-11-06 23:13:17,060 INFO  L276                IsEmpty]: Start isEmpty. Operand 4520 states and 7512 transitions.
[2023-11-06 23:13:17,095 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2842
[2023-11-06 23:13:17,096 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:17,097 INFO  L195           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, 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, 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, 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