./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/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 1fce3ed74716f3f59c3fa2884d7c5494e1e275b70dea673513aba192c84a625f
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:11:48,594 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:11:48,673 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:11:48,679 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:11:48,680 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:11:48,706 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:11:48,707 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:11:48,708 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:11:48,709 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:11:48,709 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:11:48,710 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:11:48,711 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:11:48,711 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:11:48,712 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:11:48,712 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:11:48,713 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:11:48,714 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:11:48,714 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:11:48,715 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:11:48,715 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:11:48,716 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:11:48,716 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:11:48,717 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:11:48,717 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:11:48,718 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:11:48,718 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:11:48,719 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:11:48,719 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:11:48,720 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:11:48,720 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:11:48,721 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:11:48,721 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:11:48,721 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:11:48,722 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:11:48,722 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:11:48,722 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:11:48,722 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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/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 -> 1fce3ed74716f3f59c3fa2884d7c5494e1e275b70dea673513aba192c84a625f
[2023-11-06 22:11:48,964 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:11:49,003 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:11:49,006 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:11:49,007 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:11:49,010 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:11:49,011 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-06 22:11:52,123 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:11:52,547 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:11:52,547 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-06 22:11:52,589 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/data/d0e5c5731/755640751b5e4223a557b075dae93559/FLAG4975b1ede
[2023-11-06 22:11:52,607 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/data/d0e5c5731/755640751b5e4223a557b075dae93559
[2023-11-06 22:11:52,615 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:11:52,617 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:11:52,621 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:11:52,622 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:11:52,628 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:11:52,629 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:52" (1/1) ...
[2023-11-06 22:11:52,630 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43680366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:52, skipping insertion in model container
[2023-11-06 22:11:52,630 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:52" (1/1) ...
[2023-11-06 22:11:52,766 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:11:53,004 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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c[1170,1183]
[2023-11-06 22:11:54,014 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:11:54,027 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:11:54,040 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_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c[1170,1183]
[2023-11-06 22:11:54,563 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:11:54,580 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:11:54,581 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54 WrapperNode
[2023-11-06 22:11:54,582 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:11:54,583 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:11:54,583 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:11:54,584 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:11:54,592 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:54,831 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:57,512 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22902
[2023-11-06 22:11:57,513 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:11:57,513 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:11:57,514 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:11:57,515 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:11:57,524 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:57,540 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:58,508 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:58,509 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:59,421 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:11:59,799 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:12:00,076 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:12:00,163 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:12:00,521 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:12:00,522 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:12:00,522 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:12:00,523 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:12:00,523 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (1/1) ...
[2023-11-06 22:12:00,530 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:12:00,541 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:12:00,552 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:12:00,554 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:12:00,586 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:12:00,586 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:12:00,586 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:12:00,587 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:12:01,818 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:12:01,821 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:12:15,831 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:12:15,868 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:12:15,869 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:12:15,877 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:15 BoogieIcfgContainer
[2023-11-06 22:12:15,877 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:12:15,881 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:12:15,881 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:12:15,886 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:12:15,886 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:52" (1/3) ...
[2023-11-06 22:12:15,890 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ba030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:15, skipping insertion in model container
[2023-11-06 22:12:15,891 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:54" (2/3) ...
[2023-11-06 22:12:15,891 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ba030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:15, skipping insertion in model container
[2023-11-06 22:12:15,894 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:15" (3/3) ...
[2023-11-06 22:12:15,896 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-06 22:12:15,934 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:12:15,934 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:12:16,109 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:12:16,117 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;@5a880143, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:12:16,117 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:12:16,137 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5084 states, 5082 states have (on average 1.6662731208185753) internal successors, (8468), 5083 states have internal predecessors, (8468), 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 22:12:16,195 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 794
[2023-11-06 22:12:16,196 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:16,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:12:16,198 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:16,203 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:16,204 INFO  L85        PathProgramCache]: Analyzing trace with hash 207452267, now seen corresponding path program 1 times
[2023-11-06 22:12:16,214 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:16,215 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075378647]
[2023-11-06 22:12:16,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:16,216 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:17,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:21,109 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 22:12:21,110 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:21,110 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075378647]
[2023-11-06 22:12:21,111 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075378647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:21,111 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:21,112 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:12:21,113 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635768921]
[2023-11-06 22:12:21,114 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:21,124 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:12:21,124 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:21,170 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:12:21,171 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:12:21,186 INFO  L87              Difference]: Start difference. First operand  has 5084 states, 5082 states have (on average 1.6662731208185753) internal successors, (8468), 5083 states have internal predecessors, (8468), 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 198.25) internal successors, (793), 4 states have internal predecessors, (793), 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 22:12:21,590 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:21,590 INFO  L93              Difference]: Finished difference Result 9912 states and 16514 transitions.
[2023-11-06 22:12:21,592 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:12:21,594 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 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 793
[2023-11-06 22:12:21,601 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:21,647 INFO  L225             Difference]: With dead ends: 9912
[2023-11-06 22:12:21,647 INFO  L226             Difference]: Without dead ends: 5082
[2023-11-06 22:12:21,662 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 22:12:21,667 INFO  L413           NwaCegarLoop]: 8460 mSDtfsCounter, 1 mSDsluCounter, 16914 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25374 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 22:12:21,668 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25374 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:12:21,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5082 states.
[2023-11-06 22:12:21,845 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5082.
[2023-11-06 22:12:21,859 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5082 states, 5081 states have (on average 1.6658138161779177) internal successors, (8464), 5081 states have internal predecessors, (8464), 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 22:12:21,882 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 8464 transitions.
[2023-11-06 22:12:21,884 INFO  L78                 Accepts]: Start accepts. Automaton has 5082 states and 8464 transitions. Word has length 793
[2023-11-06 22:12:21,887 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:21,887 INFO  L495      AbstractCegarLoop]: Abstraction has 5082 states and 8464 transitions.
[2023-11-06 22:12:21,889 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 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 22:12:21,889 INFO  L276                IsEmpty]: Start isEmpty. Operand 5082 states and 8464 transitions.
[2023-11-06 22:12:21,912 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 795
[2023-11-06 22:12:21,912 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:21,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:12:21,913 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:12:21,914 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:21,914 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:21,915 INFO  L85        PathProgramCache]: Analyzing trace with hash 2137842239, now seen corresponding path program 1 times
[2023-11-06 22:12:21,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:21,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55699165]
[2023-11-06 22:12:21,916 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:21,916 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:22,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:24,045 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 22:12:24,046 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:24,047 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55699165]
[2023-11-06 22:12:24,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55699165] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:24,047 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:24,048 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:12:24,048 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920335454]
[2023-11-06 22:12:24,048 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:24,052 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:12:24,052 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:24,055 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:12:24,055 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:12:24,056 INFO  L87              Difference]: Start difference. First operand 5082 states and 8464 transitions. Second operand  has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 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 22:12:24,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:24,391 INFO  L93              Difference]: Finished difference Result 9913 states and 16510 transitions.
[2023-11-06 22:12:24,391 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:12:24,392 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 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 794
[2023-11-06 22:12:24,395 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:24,423 INFO  L225             Difference]: With dead ends: 9913
[2023-11-06 22:12:24,424 INFO  L226             Difference]: Without dead ends: 5085
[2023-11-06 22:12:24,437 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 22:12:24,439 INFO  L413           NwaCegarLoop]: 8460 mSDtfsCounter, 1 mSDsluCounter, 16911 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25371 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 22:12:24,440 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25371 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:12:24,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5085 states.
[2023-11-06 22:12:24,551 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 5084.
[2023-11-06 22:12:24,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5084 states, 5083 states have (on average 1.665551839464883) internal successors, (8466), 5083 states have internal predecessors, (8466), 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 22:12:24,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 8466 transitions.
[2023-11-06 22:12:24,590 INFO  L78                 Accepts]: Start accepts. Automaton has 5084 states and 8466 transitions. Word has length 794
[2023-11-06 22:12:24,591 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:24,591 INFO  L495      AbstractCegarLoop]: Abstraction has 5084 states and 8466 transitions.
[2023-11-06 22:12:24,592 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 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 22:12:24,593 INFO  L276                IsEmpty]: Start isEmpty. Operand 5084 states and 8466 transitions.
[2023-11-06 22:12:24,615 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 796
[2023-11-06 22:12:24,616 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:24,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:12:24,617 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:12:24,617 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:24,618 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:24,618 INFO  L85        PathProgramCache]: Analyzing trace with hash 1636384771, now seen corresponding path program 1 times
[2023-11-06 22:12:24,618 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:24,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458149878]
[2023-11-06 22:12:24,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:24,620 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:25,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:26,883 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 22:12:26,883 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:26,884 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458149878]
[2023-11-06 22:12:26,884 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458149878] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:26,885 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:26,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:12:26,885 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202623160]
[2023-11-06 22:12:26,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:26,887 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:12:26,887 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:26,889 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:12:26,889 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:12:26,890 INFO  L87              Difference]: Start difference. First operand 5084 states and 8466 transitions. Second operand  has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 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 22:12:27,450 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:27,450 INFO  L93              Difference]: Finished difference Result 15661 states and 26084 transitions.
[2023-11-06 22:12:27,450 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:12:27,460 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 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 795
[2023-11-06 22:12:27,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:27,527 INFO  L225             Difference]: With dead ends: 15661
[2023-11-06 22:12:27,527 INFO  L226             Difference]: Without dead ends: 10831
[2023-11-06 22:12:27,539 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 22:12:27,545 INFO  L413           NwaCegarLoop]: 9999 mSDtfsCounter, 33312 mSDsluCounter, 16913 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33312 SdHoareTripleChecker+Valid, 26912 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:12:27,546 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33312 Valid, 26912 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:12:27,565 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10831 states.
[2023-11-06 22:12:27,707 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10831 to 6010.
[2023-11-06 22:12:27,719 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6010 states, 6009 states have (on average 1.6655017473789315) internal successors, (10008), 6009 states have internal predecessors, (10008), 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 22:12:27,746 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 10008 transitions.
[2023-11-06 22:12:27,746 INFO  L78                 Accepts]: Start accepts. Automaton has 6010 states and 10008 transitions. Word has length 795
[2023-11-06 22:12:27,747 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:27,748 INFO  L495      AbstractCegarLoop]: Abstraction has 6010 states and 10008 transitions.
[2023-11-06 22:12:27,749 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 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 22:12:27,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 6010 states and 10008 transitions.
[2023-11-06 22:12:27,876 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4013
[2023-11-06 22:12:27,876 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:27,879 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:12:27,880 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:12:27,880 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:27,881 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:27,883 INFO  L85        PathProgramCache]: Analyzing trace with hash 116615062, now seen corresponding path program 1 times
[2023-11-06 22:12:27,883 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:27,884 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545232989]
[2023-11-06 22:12:27,884 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:27,885 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:28,642 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:12:28,642 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186435372]
[2023-11-06 22:12:28,643 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:28,644 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:28,644 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:12:28,648 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:12:28,657 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:12:34,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:34,365 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17369 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:12:34,526 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:12:35,158 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked.
[2023-11-06 22:12:35,159 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:12:35,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:35,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545232989]
[2023-11-06 22:12:35,159 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:12:35,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186435372]
[2023-11-06 22:12:35,160 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [186435372] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:35,160 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:35,161 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:12:35,162 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076602391]
[2023-11-06 22:12:35,162 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:35,169 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:12:35,169 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:35,175 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:12:35,176 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:12:35,178 INFO  L87              Difference]: Start difference. First operand 6010 states and 10008 transitions. Second operand  has 8 states, 8 states have (on average 424.625) internal successors, (3397), 8 states have internal predecessors, (3397), 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 22:12:36,195 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:36,196 INFO  L93              Difference]: Finished difference Result 15667 states and 26090 transitions.
[2023-11-06 22:12:36,196 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:12:36,198 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 424.625) internal successors, (3397), 8 states have internal predecessors, (3397), 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 4012
[2023-11-06 22:12:36,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:36,259 INFO  L225             Difference]: With dead ends: 15667
[2023-11-06 22:12:36,259 INFO  L226             Difference]: Without dead ends: 10837
[2023-11-06 22:12:36,269 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4021 GetRequests, 4008 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 22:12:36,276 INFO  L413           NwaCegarLoop]: 9997 mSDtfsCounter, 22821 mSDsluCounter, 48423 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22821 SdHoareTripleChecker+Valid, 58420 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:12:36,278 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22821 Valid, 58420 Invalid, 57 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:12:36,298 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10837 states.
[2023-11-06 22:12:36,467 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 6010.
[2023-11-06 22:12:36,479 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6010 states, 6009 states have (on average 1.6655017473789315) internal successors, (10008), 6009 states have internal predecessors, (10008), 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 22:12:36,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 10008 transitions.
[2023-11-06 22:12:36,521 INFO  L78                 Accepts]: Start accepts. Automaton has 6010 states and 10008 transitions. Word has length 4012
[2023-11-06 22:12:36,530 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:36,530 INFO  L495      AbstractCegarLoop]: Abstraction has 6010 states and 10008 transitions.
[2023-11-06 22:12:36,532 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 424.625) internal successors, (3397), 8 states have internal predecessors, (3397), 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 22:12:36,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 6010 states and 10008 transitions.
[2023-11-06 22:12:36,775 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4014
[2023-11-06 22:12:36,775 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:36,779 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:12:36,843 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:12:37,004 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:37,005 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:37,005 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:37,007 INFO  L85        PathProgramCache]: Analyzing trace with hash 918223666, now seen corresponding path program 1 times
[2023-11-06 22:12:37,007 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:37,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16252239]
[2023-11-06 22:12:37,008 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:37,009 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:37,679 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:12:37,680 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531570100]
[2023-11-06 22:12:37,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:37,681 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:37,682 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:12:37,683 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:12:37,715 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:12:42,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:43,079 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17372 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:12:43,258 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:12:43,736 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked.
[2023-11-06 22:12:43,737 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:12:43,737 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:43,737 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16252239]
[2023-11-06 22:12:43,737 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:12:43,738 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531570100]
[2023-11-06 22:12:43,738 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531570100] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:43,738 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:43,739 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:12:43,740 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194711063]
[2023-11-06 22:12:43,740 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:43,746 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:12:43,747 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:43,753 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:12:43,753 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:12:43,755 INFO  L87              Difference]: Start difference. First operand 6010 states and 10008 transitions. Second operand  has 7 states, 7 states have (on average 485.7142857142857) internal successors, (3400), 7 states have internal predecessors, (3400), 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 22:12:44,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:44,666 INFO  L93              Difference]: Finished difference Result 15669 states and 26092 transitions.
[2023-11-06 22:12:44,666 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:12:44,668 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 485.7142857142857) internal successors, (3400), 7 states have internal predecessors, (3400), 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 4013
[2023-11-06 22:12:44,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:44,709 INFO  L225             Difference]: With dead ends: 15669
[2023-11-06 22:12:44,710 INFO  L226             Difference]: Without dead ends: 10836
[2023-11-06 22:12:44,719 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4022 GetRequests, 4010 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 22:12:44,720 INFO  L413           NwaCegarLoop]: 9992 mSDtfsCounter, 22820 mSDsluCounter, 38414 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22820 SdHoareTripleChecker+Valid, 48406 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:12:44,720 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22820 Valid, 48406 Invalid, 47 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:12:44,741 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10836 states.
[2023-11-06 22:12:44,902 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10836 to 6012.
[2023-11-06 22:12:44,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6012 states, 6011 states have (on average 1.665280319414407) internal successors, (10010), 6011 states have internal predecessors, (10010), 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 22:12:44,930 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 10010 transitions.
[2023-11-06 22:12:44,930 INFO  L78                 Accepts]: Start accepts. Automaton has 6012 states and 10010 transitions. Word has length 4013
[2023-11-06 22:12:44,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:44,938 INFO  L495      AbstractCegarLoop]: Abstraction has 6012 states and 10010 transitions.
[2023-11-06 22:12:44,940 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 485.7142857142857) internal successors, (3400), 7 states have internal predecessors, (3400), 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 22:12:44,941 INFO  L276                IsEmpty]: Start isEmpty. Operand 6012 states and 10010 transitions.
[2023-11-06 22:12:45,175 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4015
[2023-11-06 22:12:45,175 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:45,178 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:12:45,245 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:12:45,396 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:45,397 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:45,397 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:45,399 INFO  L85        PathProgramCache]: Analyzing trace with hash -89810000, now seen corresponding path program 1 times
[2023-11-06 22:12:45,399 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:45,400 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854174598]
[2023-11-06 22:12:45,401 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:45,402 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:46,086 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:12:46,087 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054621482]
[2023-11-06 22:12:46,088 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:46,088 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:46,088 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:12:46,093 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:12:46,100 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:12:51,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:51,657 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17375 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:12:51,898 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:12:52,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked.
[2023-11-06 22:12:52,347 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:12:52,348 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:52,348 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854174598]
[2023-11-06 22:12:52,348 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:12:52,348 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054621482]
[2023-11-06 22:12:52,348 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054621482] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:52,349 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:52,350 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:12:52,350 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893010640]
[2023-11-06 22:12:52,350 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:52,356 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:12:52,356 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:52,360 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:12:52,360 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:12:52,362 INFO  L87              Difference]: Start difference. First operand 6012 states and 10010 transitions. Second operand  has 7 states, 7 states have (on average 486.14285714285717) internal successors, (3403), 7 states have internal predecessors, (3403), 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 22:12:53,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:12:53,029 INFO  L93              Difference]: Finished difference Result 15675 states and 26098 transitions.
[2023-11-06 22:12:53,030 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:12:53,032 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 486.14285714285717) internal successors, (3403), 7 states have internal predecessors, (3403), 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 4014
[2023-11-06 22:12:53,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:12:53,063 INFO  L225             Difference]: With dead ends: 15675
[2023-11-06 22:12:53,063 INFO  L226             Difference]: Without dead ends: 10837
[2023-11-06 22:12:53,071 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4023 GetRequests, 4011 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 22:12:53,072 INFO  L413           NwaCegarLoop]: 9987 mSDtfsCounter, 22819 mSDsluCounter, 38399 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22819 SdHoareTripleChecker+Valid, 48386 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:12:53,072 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22819 Valid, 48386 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:12:53,086 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10837 states.
[2023-11-06 22:12:53,194 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 6014.
[2023-11-06 22:12:53,205 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6014 states, 6013 states have (on average 1.6650590387493764) internal successors, (10012), 6013 states have internal predecessors, (10012), 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 22:12:53,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 10012 transitions.
[2023-11-06 22:12:53,217 INFO  L78                 Accepts]: Start accepts. Automaton has 6014 states and 10012 transitions. Word has length 4014
[2023-11-06 22:12:53,224 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:12:53,224 INFO  L495      AbstractCegarLoop]: Abstraction has 6014 states and 10012 transitions.
[2023-11-06 22:12:53,226 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 486.14285714285717) internal successors, (3403), 7 states have internal predecessors, (3403), 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 22:12:53,226 INFO  L276                IsEmpty]: Start isEmpty. Operand 6014 states and 10012 transitions.
[2023-11-06 22:12:53,397 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4016
[2023-11-06 22:12:53,397 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:12:53,400 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:12:53,456 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:12:53,616 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:53,617 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:12:53,617 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:12:53,618 INFO  L85        PathProgramCache]: Analyzing trace with hash 1738606550, now seen corresponding path program 1 times
[2023-11-06 22:12:53,619 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:12:53,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290475201]
[2023-11-06 22:12:53,619 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:53,619 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:12:54,008 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:12:54,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869395277]
[2023-11-06 22:12:54,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:12:54,010 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:12:54,010 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:12:54,011 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:12:54,028 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:12:59,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:12:59,236 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17379 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:12:59,296 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:12:59,702 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked.
[2023-11-06 22:12:59,702 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:12:59,702 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:12:59,702 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290475201]
[2023-11-06 22:12:59,703 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:12:59,703 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869395277]
[2023-11-06 22:12:59,703 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869395277] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:12:59,703 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:12:59,704 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:12:59,704 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544365305]
[2023-11-06 22:12:59,705 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:12:59,710 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:12:59,710 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:12:59,715 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:12:59,715 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:12:59,716 INFO  L87              Difference]: Start difference. First operand 6014 states and 10012 transitions. Second operand  has 7 states, 7 states have (on average 486.57142857142856) internal successors, (3406), 7 states have internal predecessors, (3406), 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 22:13:00,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:00,419 INFO  L93              Difference]: Finished difference Result 15681 states and 26104 transitions.
[2023-11-06 22:13:00,419 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:00,420 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 486.57142857142856) internal successors, (3406), 7 states have internal predecessors, (3406), 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 4015
[2023-11-06 22:13:00,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:00,446 INFO  L225             Difference]: With dead ends: 15681
[2023-11-06 22:13:00,446 INFO  L226             Difference]: Without dead ends: 10838
[2023-11-06 22:13:00,451 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4024 GetRequests, 4012 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:13:00,452 INFO  L413           NwaCegarLoop]: 9982 mSDtfsCounter, 22818 mSDsluCounter, 38384 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22818 SdHoareTripleChecker+Valid, 48366 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:13:00,453 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22818 Valid, 48366 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:00,464 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10838 states.
[2023-11-06 22:13:00,556 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 6016.
[2023-11-06 22:13:00,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6016 states, 6015 states have (on average 1.6648379052369078) internal successors, (10014), 6015 states have internal predecessors, (10014), 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 22:13:00,574 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 10014 transitions.
[2023-11-06 22:13:00,574 INFO  L78                 Accepts]: Start accepts. Automaton has 6016 states and 10014 transitions. Word has length 4015
[2023-11-06 22:13:00,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:00,580 INFO  L495      AbstractCegarLoop]: Abstraction has 6016 states and 10014 transitions.
[2023-11-06 22:13:00,581 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 486.57142857142856) internal successors, (3406), 7 states have internal predecessors, (3406), 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 22:13:00,581 INFO  L276                IsEmpty]: Start isEmpty. Operand 6016 states and 10014 transitions.
[2023-11-06 22:13:00,686 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4017
[2023-11-06 22:13:00,686 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:00,689 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:00,734 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:00,889 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:00,890 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:00,890 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:00,892 INFO  L85        PathProgramCache]: Analyzing trace with hash 657377672, now seen corresponding path program 1 times
[2023-11-06 22:13:00,892 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:00,892 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627782144]
[2023-11-06 22:13:00,893 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:00,893 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:01,375 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:01,376 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773800889]
[2023-11-06 22:13:01,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:01,377 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:01,378 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:01,379 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:01,388 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:13:06,440 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:06,563 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17382 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:13:06,623 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:07,046 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked.
[2023-11-06 22:13:07,047 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:07,047 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:07,047 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627782144]
[2023-11-06 22:13:07,047 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:07,047 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773800889]
[2023-11-06 22:13:07,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773800889] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:07,048 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:07,049 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:13:07,049 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661086140]
[2023-11-06 22:13:07,049 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:07,054 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:13:07,055 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:07,059 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:13:07,059 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:13:07,062 INFO  L87              Difference]: Start difference. First operand 6016 states and 10014 transitions. Second operand  has 8 states, 8 states have (on average 426.125) internal successors, (3409), 8 states have internal predecessors, (3409), 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 22:13:07,690 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:07,690 INFO  L93              Difference]: Finished difference Result 15687 states and 26110 transitions.
[2023-11-06 22:13:07,690 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:07,692 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 426.125) internal successors, (3409), 8 states have internal predecessors, (3409), 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 4016
[2023-11-06 22:13:07,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:07,718 INFO  L225             Difference]: With dead ends: 15687
[2023-11-06 22:13:07,719 INFO  L226             Difference]: Without dead ends: 10839
[2023-11-06 22:13:07,727 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4025 GetRequests, 4012 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 22:13:07,728 INFO  L413           NwaCegarLoop]: 9977 mSDtfsCounter, 22817 mSDsluCounter, 46385 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22817 SdHoareTripleChecker+Valid, 56362 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:13:07,728 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22817 Valid, 56362 Invalid, 53 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:07,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10839 states.
[2023-11-06 22:13:07,979 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 6018.
[2023-11-06 22:13:07,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6018 states, 6017 states have (on average 1.6646169187302642) internal successors, (10016), 6017 states have internal predecessors, (10016), 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 22:13:07,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 10016 transitions.
[2023-11-06 22:13:07,998 INFO  L78                 Accepts]: Start accepts. Automaton has 6018 states and 10016 transitions. Word has length 4016
[2023-11-06 22:13:08,002 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:08,002 INFO  L495      AbstractCegarLoop]: Abstraction has 6018 states and 10016 transitions.
[2023-11-06 22:13:08,003 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 426.125) internal successors, (3409), 8 states have internal predecessors, (3409), 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 22:13:08,003 INFO  L276                IsEmpty]: Start isEmpty. Operand 6018 states and 10016 transitions.
[2023-11-06 22:13:08,126 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4018
[2023-11-06 22:13:08,126 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:08,129 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:13:08,190 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:08,344 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:08,345 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:08,345 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:08,347 INFO  L85        PathProgramCache]: Analyzing trace with hash 243239612, now seen corresponding path program 1 times
[2023-11-06 22:13:08,347 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:08,347 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571094199]
[2023-11-06 22:13:08,348 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:08,348 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:08,768 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:08,768 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453353472]
[2023-11-06 22:13:08,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:08,770 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:08,770 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:08,771 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:08,776 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:13:13,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:13,800 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17385 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:13,854 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:14,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked.
[2023-11-06 22:13:14,362 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:14,362 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:14,363 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571094199]
[2023-11-06 22:13:14,363 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:14,363 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453353472]
[2023-11-06 22:13:14,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [453353472] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:14,363 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:14,364 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:14,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151946770]
[2023-11-06 22:13:14,365 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:14,371 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:14,371 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:14,375 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:14,375 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:14,377 INFO  L87              Difference]: Start difference. First operand 6018 states and 10016 transitions. Second operand  has 7 states, 7 states have (on average 487.42857142857144) internal successors, (3412), 7 states have internal predecessors, (3412), 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 22:13:14,928 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:14,928 INFO  L93              Difference]: Finished difference Result 15693 states and 26116 transitions.
[2023-11-06 22:13:14,929 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:14,930 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 487.42857142857144) internal successors, (3412), 7 states have internal predecessors, (3412), 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 4017
[2023-11-06 22:13:14,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:14,957 INFO  L225             Difference]: With dead ends: 15693
[2023-11-06 22:13:14,958 INFO  L226             Difference]: Without dead ends: 10840
[2023-11-06 22:13:14,966 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4026 GetRequests, 4014 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 22:13:14,967 INFO  L413           NwaCegarLoop]: 9972 mSDtfsCounter, 22816 mSDsluCounter, 38354 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22816 SdHoareTripleChecker+Valid, 48326 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:13:14,967 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22816 Valid, 48326 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:14,980 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10840 states.
[2023-11-06 22:13:15,084 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 6020.
[2023-11-06 22:13:15,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6020 states, 6019 states have (on average 1.6643960790829042) internal successors, (10018), 6019 states have internal predecessors, (10018), 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 22:13:15,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 10018 transitions.
[2023-11-06 22:13:15,102 INFO  L78                 Accepts]: Start accepts. Automaton has 6020 states and 10018 transitions. Word has length 4017
[2023-11-06 22:13:15,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:15,106 INFO  L495      AbstractCegarLoop]: Abstraction has 6020 states and 10018 transitions.
[2023-11-06 22:13:15,108 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 487.42857142857144) internal successors, (3412), 7 states have internal predecessors, (3412), 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 22:13:15,108 INFO  L276                IsEmpty]: Start isEmpty. Operand 6020 states and 10018 transitions.
[2023-11-06 22:13:15,228 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4019
[2023-11-06 22:13:15,228 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:15,321 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:15,384 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:15,521 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:15,522 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:15,522 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:15,524 INFO  L85        PathProgramCache]: Analyzing trace with hash -1523017310, now seen corresponding path program 1 times
[2023-11-06 22:13:15,524 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:15,524 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611361716]
[2023-11-06 22:13:15,525 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:15,525 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:15,882 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:15,882 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304259980]
[2023-11-06 22:13:15,884 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:15,884 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:15,884 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:15,885 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:15,908 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:13:20,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:20,972 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17388 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:21,018 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:21,330 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked.
[2023-11-06 22:13:21,330 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:21,330 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:21,330 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611361716]
[2023-11-06 22:13:21,331 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:21,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304259980]
[2023-11-06 22:13:21,331 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [304259980] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:21,331 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:21,332 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:21,332 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266867156]
[2023-11-06 22:13:21,332 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:21,337 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:21,337 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:21,341 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:21,341 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:21,343 INFO  L87              Difference]: Start difference. First operand 6020 states and 10018 transitions. Second operand  has 7 states, 7 states have (on average 487.85714285714283) internal successors, (3415), 7 states have internal predecessors, (3415), 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 22:13:21,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:21,879 INFO  L93              Difference]: Finished difference Result 15699 states and 26122 transitions.
[2023-11-06 22:13:21,879 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:21,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 487.85714285714283) internal successors, (3415), 7 states have internal predecessors, (3415), 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 4018
[2023-11-06 22:13:21,885 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:21,921 INFO  L225             Difference]: With dead ends: 15699
[2023-11-06 22:13:21,922 INFO  L226             Difference]: Without dead ends: 10841
[2023-11-06 22:13:21,927 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4027 GetRequests, 4015 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 22:13:21,928 INFO  L413           NwaCegarLoop]: 9967 mSDtfsCounter, 22815 mSDsluCounter, 38339 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22815 SdHoareTripleChecker+Valid, 48306 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 22:13:21,929 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22815 Valid, 48306 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:21,940 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10841 states.
[2023-11-06 22:13:22,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10841 to 6022.
[2023-11-06 22:13:22,035 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6022 states, 6021 states have (on average 1.6641753861484803) internal successors, (10020), 6021 states have internal predecessors, (10020), 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 22:13:22,045 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 10020 transitions.
[2023-11-06 22:13:22,045 INFO  L78                 Accepts]: Start accepts. Automaton has 6022 states and 10020 transitions. Word has length 4018
[2023-11-06 22:13:22,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:22,049 INFO  L495      AbstractCegarLoop]: Abstraction has 6022 states and 10020 transitions.
[2023-11-06 22:13:22,050 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 487.85714285714283) internal successors, (3415), 7 states have internal predecessors, (3415), 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 22:13:22,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 6022 states and 10020 transitions.
[2023-11-06 22:13:22,162 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4020
[2023-11-06 22:13:22,162 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:22,165 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:13:22,214 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-06 22:13:22,376 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:13:22,377 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:22,377 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:22,379 INFO  L85        PathProgramCache]: Analyzing trace with hash 785067616, now seen corresponding path program 1 times
[2023-11-06 22:13:22,379 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:22,379 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688488744]
[2023-11-06 22:13:22,380 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:22,380 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:22,754 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:22,754 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784108710]
[2023-11-06 22:13:22,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:22,756 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:22,756 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:22,757 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:22,765 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:13:27,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:27,821 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17392 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:27,877 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:28,226 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked.
[2023-11-06 22:13:28,227 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:28,227 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:28,227 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688488744]
[2023-11-06 22:13:28,227 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:28,227 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784108710]
[2023-11-06 22:13:28,228 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [784108710] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:28,228 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:28,229 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:28,229 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936615289]
[2023-11-06 22:13:28,229 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:28,234 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:28,234 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:28,239 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:28,239 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:28,240 INFO  L87              Difference]: Start difference. First operand 6022 states and 10020 transitions. Second operand  has 7 states, 7 states have (on average 488.2857142857143) internal successors, (3418), 7 states have internal predecessors, (3418), 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 22:13:28,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:28,698 INFO  L93              Difference]: Finished difference Result 15705 states and 26128 transitions.
[2023-11-06 22:13:28,699 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:28,700 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 488.2857142857143) internal successors, (3418), 7 states have internal predecessors, (3418), 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 4019
[2023-11-06 22:13:28,704 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:28,725 INFO  L225             Difference]: With dead ends: 15705
[2023-11-06 22:13:28,725 INFO  L226             Difference]: Without dead ends: 10842
[2023-11-06 22:13:28,733 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4028 GetRequests, 4016 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 22:13:28,733 INFO  L413           NwaCegarLoop]: 9962 mSDtfsCounter, 22814 mSDsluCounter, 38324 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22814 SdHoareTripleChecker+Valid, 48286 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:13:28,734 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22814 Valid, 48286 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:28,746 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10842 states.
[2023-11-06 22:13:28,840 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6024.
[2023-11-06 22:13:28,848 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6024 states, 6023 states have (on average 1.6639548397808401) internal successors, (10022), 6023 states have internal predecessors, (10022), 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 22:13:28,857 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 10022 transitions.
[2023-11-06 22:13:28,857 INFO  L78                 Accepts]: Start accepts. Automaton has 6024 states and 10022 transitions. Word has length 4019
[2023-11-06 22:13:28,860 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:28,860 INFO  L495      AbstractCegarLoop]: Abstraction has 6024 states and 10022 transitions.
[2023-11-06 22:13:28,861 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 488.2857142857143) internal successors, (3418), 7 states have internal predecessors, (3418), 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 22:13:28,862 INFO  L276                IsEmpty]: Start isEmpty. Operand 6024 states and 10022 transitions.
[2023-11-06 22:13:28,975 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4021
[2023-11-06 22:13:28,975 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:28,978 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:29,046 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:29,192 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-06 22:13:29,192 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:29,192 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:29,194 INFO  L85        PathProgramCache]: Analyzing trace with hash 1874458234, now seen corresponding path program 1 times
[2023-11-06 22:13:29,194 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:29,195 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763701266]
[2023-11-06 22:13:29,195 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:29,196 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:29,583 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:29,583 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937947426]
[2023-11-06 22:13:29,585 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:29,585 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:29,585 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:29,586 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:29,593 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:13:34,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:34,664 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17395 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:34,715 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:35,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2023-11-06 22:13:35,005 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:35,005 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:35,006 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763701266]
[2023-11-06 22:13:35,006 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:35,006 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937947426]
[2023-11-06 22:13:35,006 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [937947426] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:35,006 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:35,007 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:35,008 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844579543]
[2023-11-06 22:13:35,008 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:35,013 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:35,013 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:35,017 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:35,018 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:35,019 INFO  L87              Difference]: Start difference. First operand 6024 states and 10022 transitions. Second operand  has 7 states, 7 states have (on average 488.7142857142857) internal successors, (3421), 7 states have internal predecessors, (3421), 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 22:13:35,461 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:35,461 INFO  L93              Difference]: Finished difference Result 15711 states and 26134 transitions.
[2023-11-06 22:13:35,462 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:35,462 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 488.7142857142857) internal successors, (3421), 7 states have internal predecessors, (3421), 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 4020
[2023-11-06 22:13:35,465 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:35,485 INFO  L225             Difference]: With dead ends: 15711
[2023-11-06 22:13:35,485 INFO  L226             Difference]: Without dead ends: 10843
[2023-11-06 22:13:35,493 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4029 GetRequests, 4017 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 22:13:35,494 INFO  L413           NwaCegarLoop]: 9957 mSDtfsCounter, 22813 mSDsluCounter, 38309 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22813 SdHoareTripleChecker+Valid, 48266 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:13:35,494 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22813 Valid, 48266 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:35,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10843 states.
[2023-11-06 22:13:35,598 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10843 to 6026.
[2023-11-06 22:13:35,604 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6026 states, 6025 states have (on average 1.6637344398340248) internal successors, (10024), 6025 states have internal predecessors, (10024), 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 22:13:35,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 10024 transitions.
[2023-11-06 22:13:35,613 INFO  L78                 Accepts]: Start accepts. Automaton has 6026 states and 10024 transitions. Word has length 4020
[2023-11-06 22:13:35,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:35,616 INFO  L495      AbstractCegarLoop]: Abstraction has 6026 states and 10024 transitions.
[2023-11-06 22:13:35,617 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 488.7142857142857) internal successors, (3421), 7 states have internal predecessors, (3421), 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 22:13:35,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 6026 states and 10024 transitions.
[2023-11-06 22:13:35,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4022
[2023-11-06 22:13:35,732 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:35,735 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:13:35,795 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:35,960 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 22:13:35,961 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:35,961 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:35,963 INFO  L85        PathProgramCache]: Analyzing trace with hash 128890182, now seen corresponding path program 1 times
[2023-11-06 22:13:35,963 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:35,963 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183672938]
[2023-11-06 22:13:35,964 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:35,964 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:36,435 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:36,435 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77196843]
[2023-11-06 22:13:36,436 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:36,437 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:36,437 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:36,438 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:36,468 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 22:13:41,413 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:41,525 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17398 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:13:41,580 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:41,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked.
[2023-11-06 22:13:41,901 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:41,902 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:41,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183672938]
[2023-11-06 22:13:41,902 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:41,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77196843]
[2023-11-06 22:13:41,903 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [77196843] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:41,904 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:41,905 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:13:41,905 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32647508]
[2023-11-06 22:13:41,905 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:41,910 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:13:41,910 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:41,914 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:13:41,915 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:13:41,916 INFO  L87              Difference]: Start difference. First operand 6026 states and 10024 transitions. Second operand  has 8 states, 8 states have (on average 428.0) internal successors, (3424), 8 states have internal predecessors, (3424), 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 22:13:42,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:42,351 INFO  L93              Difference]: Finished difference Result 15717 states and 26140 transitions.
[2023-11-06 22:13:42,352 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:42,352 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 428.0) internal successors, (3424), 8 states have internal predecessors, (3424), 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 4021
[2023-11-06 22:13:42,355 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:42,382 INFO  L225             Difference]: With dead ends: 15717
[2023-11-06 22:13:42,382 INFO  L226             Difference]: Without dead ends: 10844
[2023-11-06 22:13:42,390 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4030 GetRequests, 4017 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 22:13:42,391 INFO  L413           NwaCegarLoop]: 9952 mSDtfsCounter, 22812 mSDsluCounter, 48242 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22812 SdHoareTripleChecker+Valid, 58194 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 22:13:42,391 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22812 Valid, 58194 Invalid, 58 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:42,404 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10844 states.
[2023-11-06 22:13:42,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10844 to 6028.
[2023-11-06 22:13:42,596 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6028 states, 6027 states have (on average 1.6635141861622698) internal successors, (10026), 6027 states have internal predecessors, (10026), 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 22:13:42,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 10026 transitions.
[2023-11-06 22:13:42,606 INFO  L78                 Accepts]: Start accepts. Automaton has 6028 states and 10026 transitions. Word has length 4021
[2023-11-06 22:13:42,609 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:42,609 INFO  L495      AbstractCegarLoop]: Abstraction has 6028 states and 10026 transitions.
[2023-11-06 22:13:42,610 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 428.0) internal successors, (3424), 8 states have internal predecessors, (3424), 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 22:13:42,610 INFO  L276                IsEmpty]: Start isEmpty. Operand 6028 states and 10026 transitions.
[2023-11-06 22:13:42,718 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4023
[2023-11-06 22:13:42,718 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:42,721 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:42,785 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:42,948 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 22:13:42,949 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:42,949 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:42,950 INFO  L85        PathProgramCache]: Analyzing trace with hash -1696603500, now seen corresponding path program 1 times
[2023-11-06 22:13:42,951 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:42,951 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869072856]
[2023-11-06 22:13:42,952 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:42,952 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:43,326 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:43,326 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770706395]
[2023-11-06 22:13:43,327 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:43,328 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:43,328 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:43,329 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:43,359 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 22:13:48,358 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:48,471 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17401 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:48,524 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:48,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked.
[2023-11-06 22:13:48,818 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:48,818 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:48,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869072856]
[2023-11-06 22:13:48,819 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:48,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770706395]
[2023-11-06 22:13:48,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770706395] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:48,819 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:48,820 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:48,820 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702546755]
[2023-11-06 22:13:48,821 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:48,825 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:48,825 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:48,829 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:48,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:48,831 INFO  L87              Difference]: Start difference. First operand 6028 states and 10026 transitions. Second operand  has 7 states, 7 states have (on average 489.85714285714283) internal successors, (3429), 7 states have internal predecessors, (3429), 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 22:13:49,201 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:49,202 INFO  L93              Difference]: Finished difference Result 15726 states and 26151 transitions.
[2023-11-06 22:13:49,202 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:49,203 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 489.85714285714283) internal successors, (3429), 7 states have internal predecessors, (3429), 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 4022
[2023-11-06 22:13:49,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:49,215 INFO  L225             Difference]: With dead ends: 15726
[2023-11-06 22:13:49,215 INFO  L226             Difference]: Without dead ends: 10848
[2023-11-06 22:13:49,221 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4031 GetRequests, 4019 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 22:13:49,222 INFO  L413           NwaCegarLoop]: 9942 mSDtfsCounter, 22814 mSDsluCounter, 38264 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22814 SdHoareTripleChecker+Valid, 48206 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 22:13:49,222 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22814 Valid, 48206 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:49,234 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10848 states.
[2023-11-06 22:13:49,329 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 6033.
[2023-11-06 22:13:49,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6033 states, 6032 states have (on average 1.6632957559681698) internal successors, (10033), 6032 states have internal predecessors, (10033), 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 22:13:49,344 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 10033 transitions.
[2023-11-06 22:13:49,345 INFO  L78                 Accepts]: Start accepts. Automaton has 6033 states and 10033 transitions. Word has length 4022
[2023-11-06 22:13:49,347 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:49,348 INFO  L495      AbstractCegarLoop]: Abstraction has 6033 states and 10033 transitions.
[2023-11-06 22:13:49,349 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 489.85714285714283) internal successors, (3429), 7 states have internal predecessors, (3429), 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 22:13:49,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 6033 states and 10033 transitions.
[2023-11-06 22:13:49,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4024
[2023-11-06 22:13:49,458 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:49,461 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:49,528 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:49,684 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:49,684 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:49,685 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:49,686 INFO  L85        PathProgramCache]: Analyzing trace with hash -1858958382, now seen corresponding path program 1 times
[2023-11-06 22:13:49,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:49,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148898146]
[2023-11-06 22:13:49,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:49,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:50,134 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:50,135 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028965739]
[2023-11-06 22:13:50,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:50,136 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:50,136 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:50,138 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:50,160 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 22:13:54,981 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:13:55,091 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17404 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:13:55,145 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:13:55,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked.
[2023-11-06 22:13:55,450 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:13:55,450 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:13:55,450 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148898146]
[2023-11-06 22:13:55,450 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:13:55,450 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028965739]
[2023-11-06 22:13:55,450 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028965739] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:13:55,450 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:13:55,452 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:13:55,452 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435710099]
[2023-11-06 22:13:55,452 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:13:55,455 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:13:55,455 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:13:55,458 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:13:55,459 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:13:55,460 INFO  L87              Difference]: Start difference. First operand 6033 states and 10033 transitions. Second operand  has 7 states, 7 states have (on average 490.57142857142856) internal successors, (3434), 7 states have internal predecessors, (3434), 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 22:13:55,833 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:13:55,833 INFO  L93              Difference]: Finished difference Result 15741 states and 26172 transitions.
[2023-11-06 22:13:55,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:13:55,835 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 490.57142857142856) internal successors, (3434), 7 states have internal predecessors, (3434), 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 4023
[2023-11-06 22:13:55,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:13:55,847 INFO  L225             Difference]: With dead ends: 15741
[2023-11-06 22:13:55,847 INFO  L226             Difference]: Without dead ends: 10852
[2023-11-06 22:13:55,852 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4032 GetRequests, 4020 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 22:13:55,852 INFO  L413           NwaCegarLoop]: 9932 mSDtfsCounter, 22818 mSDsluCounter, 38234 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22818 SdHoareTripleChecker+Valid, 48166 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 22:13:55,853 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22818 Valid, 48166 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:13:55,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10852 states.
[2023-11-06 22:13:55,952 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10852 to 6038.
[2023-11-06 22:13:55,959 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6038 states, 6037 states have (on average 1.6630776875931754) internal successors, (10040), 6037 states have internal predecessors, (10040), 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 22:13:55,968 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 10040 transitions.
[2023-11-06 22:13:55,968 INFO  L78                 Accepts]: Start accepts. Automaton has 6038 states and 10040 transitions. Word has length 4023
[2023-11-06 22:13:55,971 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:13:55,971 INFO  L495      AbstractCegarLoop]: Abstraction has 6038 states and 10040 transitions.
[2023-11-06 22:13:55,972 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 490.57142857142856) internal successors, (3434), 7 states have internal predecessors, (3434), 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 22:13:55,973 INFO  L276                IsEmpty]: Start isEmpty. Operand 6038 states and 10040 transitions.
[2023-11-06 22:13:56,112 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4025
[2023-11-06 22:13:56,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:13:56,114 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:13:56,167 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 22:13:56,336 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:56,337 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:13:56,337 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:13:56,338 INFO  L85        PathProgramCache]: Analyzing trace with hash 502201608, now seen corresponding path program 1 times
[2023-11-06 22:13:56,338 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:13:56,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545364117]
[2023-11-06 22:13:56,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:56,340 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:13:56,725 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:13:56,725 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571319004]
[2023-11-06 22:13:56,726 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:13:56,726 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:13:56,727 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:13:56,728 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:13:56,753 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 22:14:01,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:01,653 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17407 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:01,703 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:01,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked.
[2023-11-06 22:14:01,982 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:01,983 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:01,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545364117]
[2023-11-06 22:14:01,983 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:01,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571319004]
[2023-11-06 22:14:01,983 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571319004] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:01,983 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:01,984 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:01,985 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257613303]
[2023-11-06 22:14:01,985 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:01,989 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:01,990 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:01,994 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:01,994 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:01,995 INFO  L87              Difference]: Start difference. First operand 6038 states and 10040 transitions. Second operand  has 7 states, 7 states have (on average 491.2857142857143) internal successors, (3439), 7 states have internal predecessors, (3439), 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 22:14:02,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:02,371 INFO  L93              Difference]: Finished difference Result 15756 states and 26193 transitions.
[2023-11-06 22:14:02,371 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:02,372 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 491.2857142857143) internal successors, (3439), 7 states have internal predecessors, (3439), 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 4024
[2023-11-06 22:14:02,376 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:02,385 INFO  L225             Difference]: With dead ends: 15756
[2023-11-06 22:14:02,385 INFO  L226             Difference]: Without dead ends: 10856
[2023-11-06 22:14:02,389 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4033 GetRequests, 4021 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 22:14:02,390 INFO  L413           NwaCegarLoop]: 9922 mSDtfsCounter, 22822 mSDsluCounter, 38204 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22822 SdHoareTripleChecker+Valid, 48126 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 22:14:02,390 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22822 Valid, 48126 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:02,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10856 states.
[2023-11-06 22:14:02,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10856 to 6043.
[2023-11-06 22:14:02,494 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6043 states, 6042 states have (on average 1.662859980139027) internal successors, (10047), 6042 states have internal predecessors, (10047), 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 22:14:02,503 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6043 states to 6043 states and 10047 transitions.
[2023-11-06 22:14:02,504 INFO  L78                 Accepts]: Start accepts. Automaton has 6043 states and 10047 transitions. Word has length 4024
[2023-11-06 22:14:02,506 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:02,507 INFO  L495      AbstractCegarLoop]: Abstraction has 6043 states and 10047 transitions.
[2023-11-06 22:14:02,508 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 491.2857142857143) internal successors, (3439), 7 states have internal predecessors, (3439), 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 22:14:02,508 INFO  L276                IsEmpty]: Start isEmpty. Operand 6043 states and 10047 transitions.
[2023-11-06 22:14:02,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4026
[2023-11-06 22:14:02,692 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:02,694 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:14:02,749 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-06 22:14:02,919 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 22:14:02,919 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:02,919 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:02,921 INFO  L85        PathProgramCache]: Analyzing trace with hash 597053534, now seen corresponding path program 1 times
[2023-11-06 22:14:02,921 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:02,921 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766926892]
[2023-11-06 22:14:02,921 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:02,922 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:03,297 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:03,298 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531758861]
[2023-11-06 22:14:03,299 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:03,299 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:03,299 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:03,300 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:03,308 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 22:14:08,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:08,243 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17410 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:08,295 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:08,583 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked.
[2023-11-06 22:14:08,583 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:08,583 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:08,584 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766926892]
[2023-11-06 22:14:08,584 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:08,584 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531758861]
[2023-11-06 22:14:08,584 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531758861] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:08,584 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:08,585 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:08,586 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866173997]
[2023-11-06 22:14:08,586 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:08,590 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:08,590 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:08,594 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:08,594 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:08,595 INFO  L87              Difference]: Start difference. First operand 6043 states and 10047 transitions. Second operand  has 7 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 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 22:14:08,968 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:08,968 INFO  L93              Difference]: Finished difference Result 15771 states and 26214 transitions.
[2023-11-06 22:14:08,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:08,969 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 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 4025
[2023-11-06 22:14:08,973 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:08,983 INFO  L225             Difference]: With dead ends: 15771
[2023-11-06 22:14:08,983 INFO  L226             Difference]: Without dead ends: 10860
[2023-11-06 22:14:08,987 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4034 GetRequests, 4022 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 22:14:08,988 INFO  L413           NwaCegarLoop]: 9912 mSDtfsCounter, 22826 mSDsluCounter, 38174 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22826 SdHoareTripleChecker+Valid, 48086 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 22:14:08,988 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22826 Valid, 48086 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:08,996 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10860 states.
[2023-11-06 22:14:09,067 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10860 to 6048.
[2023-11-06 22:14:09,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6048 states, 6047 states have (on average 1.6626426327104349) internal successors, (10054), 6047 states have internal predecessors, (10054), 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 22:14:09,081 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 10054 transitions.
[2023-11-06 22:14:09,081 INFO  L78                 Accepts]: Start accepts. Automaton has 6048 states and 10054 transitions. Word has length 4025
[2023-11-06 22:14:09,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:09,084 INFO  L495      AbstractCegarLoop]: Abstraction has 6048 states and 10054 transitions.
[2023-11-06 22:14:09,085 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 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 22:14:09,086 INFO  L276                IsEmpty]: Start isEmpty. Operand 6048 states and 10054 transitions.
[2023-11-06 22:14:09,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4027
[2023-11-06 22:14:09,166 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:09,168 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:14:09,224 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-06 22:14:09,385 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:09,386 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:09,386 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:09,387 INFO  L85        PathProgramCache]: Analyzing trace with hash -1709536900, now seen corresponding path program 1 times
[2023-11-06 22:14:09,387 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:09,387 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595272207]
[2023-11-06 22:14:09,388 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:09,389 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:09,715 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:09,715 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667977983]
[2023-11-06 22:14:09,716 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:09,716 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:09,717 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:09,718 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:09,740 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 22:14:14,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:14,734 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17413 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:14,787 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:15,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked.
[2023-11-06 22:14:15,077 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:15,077 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:15,077 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595272207]
[2023-11-06 22:14:15,077 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:15,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667977983]
[2023-11-06 22:14:15,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [667977983] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:15,078 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:15,079 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:15,079 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547018884]
[2023-11-06 22:14:15,079 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:15,083 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:15,083 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:15,086 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:15,086 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:15,087 INFO  L87              Difference]: Start difference. First operand 6048 states and 10054 transitions. Second operand  has 7 states, 7 states have (on average 492.7142857142857) internal successors, (3449), 7 states have internal predecessors, (3449), 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 22:14:15,468 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:15,469 INFO  L93              Difference]: Finished difference Result 15786 states and 26235 transitions.
[2023-11-06 22:14:15,469 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:15,470 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 492.7142857142857) internal successors, (3449), 7 states have internal predecessors, (3449), 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 4026
[2023-11-06 22:14:15,473 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:15,482 INFO  L225             Difference]: With dead ends: 15786
[2023-11-06 22:14:15,482 INFO  L226             Difference]: Without dead ends: 10864
[2023-11-06 22:14:15,487 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4035 GetRequests, 4023 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 22:14:15,487 INFO  L413           NwaCegarLoop]: 9902 mSDtfsCounter, 22830 mSDsluCounter, 38144 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22830 SdHoareTripleChecker+Valid, 48046 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 22:14:15,487 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22830 Valid, 48046 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:15,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10864 states.
[2023-11-06 22:14:15,576 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 6053.
[2023-11-06 22:14:15,582 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6053 states, 6052 states have (on average 1.6624256444150693) internal successors, (10061), 6052 states have internal predecessors, (10061), 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 22:14:15,588 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 10061 transitions.
[2023-11-06 22:14:15,588 INFO  L78                 Accepts]: Start accepts. Automaton has 6053 states and 10061 transitions. Word has length 4026
[2023-11-06 22:14:15,590 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:15,590 INFO  L495      AbstractCegarLoop]: Abstraction has 6053 states and 10061 transitions.
[2023-11-06 22:14:15,591 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 492.7142857142857) internal successors, (3449), 7 states have internal predecessors, (3449), 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 22:14:15,591 INFO  L276                IsEmpty]: Start isEmpty. Operand 6053 states and 10061 transitions.
[2023-11-06 22:14:15,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4028
[2023-11-06 22:14:15,660 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:15,662 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:14:15,713 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-06 22:14:15,863 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 22:14:15,864 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:15,864 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:15,865 INFO  L85        PathProgramCache]: Analyzing trace with hash 277955306, now seen corresponding path program 1 times
[2023-11-06 22:14:15,865 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:15,865 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082713036]
[2023-11-06 22:14:15,866 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:15,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:16,204 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:16,204 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659641139]
[2023-11-06 22:14:16,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:16,205 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:16,205 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:16,208 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:16,209 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 22:14:21,007 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:21,111 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17416 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:21,162 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:21,622 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked.
[2023-11-06 22:14:21,622 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:21,622 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:21,622 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082713036]
[2023-11-06 22:14:21,622 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:21,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659641139]
[2023-11-06 22:14:21,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659641139] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:21,623 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:21,624 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:21,624 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475248492]
[2023-11-06 22:14:21,624 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:21,627 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:21,627 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:21,630 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:21,630 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:21,631 INFO  L87              Difference]: Start difference. First operand 6053 states and 10061 transitions. Second operand  has 7 states, 7 states have (on average 493.42857142857144) internal successors, (3454), 7 states have internal predecessors, (3454), 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 22:14:22,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:22,005 INFO  L93              Difference]: Finished difference Result 15801 states and 26256 transitions.
[2023-11-06 22:14:22,005 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:22,006 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 493.42857142857144) internal successors, (3454), 7 states have internal predecessors, (3454), 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 4027
[2023-11-06 22:14:22,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:22,018 INFO  L225             Difference]: With dead ends: 15801
[2023-11-06 22:14:22,018 INFO  L226             Difference]: Without dead ends: 10868
[2023-11-06 22:14:22,022 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4036 GetRequests, 4024 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 22:14:22,023 INFO  L413           NwaCegarLoop]: 9892 mSDtfsCounter, 22834 mSDsluCounter, 38114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22834 SdHoareTripleChecker+Valid, 48006 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 22:14:22,023 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22834 Valid, 48006 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:22,032 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10868 states.
[2023-11-06 22:14:22,110 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10868 to 6058.
[2023-11-06 22:14:22,115 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6058 states, 6057 states have (on average 1.6622090143635464) internal successors, (10068), 6057 states have internal predecessors, (10068), 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 22:14:22,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 10068 transitions.
[2023-11-06 22:14:22,125 INFO  L78                 Accepts]: Start accepts. Automaton has 6058 states and 10068 transitions. Word has length 4027
[2023-11-06 22:14:22,128 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:22,128 INFO  L495      AbstractCegarLoop]: Abstraction has 6058 states and 10068 transitions.
[2023-11-06 22:14:22,129 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 493.42857142857144) internal successors, (3454), 7 states have internal predecessors, (3454), 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 22:14:22,129 INFO  L276                IsEmpty]: Start isEmpty. Operand 6058 states and 10068 transitions.
[2023-11-06 22:14:22,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4029
[2023-11-06 22:14:22,226 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:22,227 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:14:22,274 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-06 22:14:22,427 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:22,428 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:22,428 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:22,429 INFO  L85        PathProgramCache]: Analyzing trace with hash -20232208, now seen corresponding path program 1 times
[2023-11-06 22:14:22,429 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:22,429 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429263162]
[2023-11-06 22:14:22,429 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:22,430 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:22,767 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:22,767 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441237869]
[2023-11-06 22:14:22,768 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:22,769 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:22,769 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:22,770 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:22,777 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 22:14:27,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:27,680 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17419 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:27,723 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:28,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked.
[2023-11-06 22:14:28,166 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:28,166 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:28,166 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429263162]
[2023-11-06 22:14:28,167 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:28,167 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441237869]
[2023-11-06 22:14:28,167 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [441237869] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:28,167 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:28,168 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:28,168 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246388926]
[2023-11-06 22:14:28,168 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:28,171 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:28,171 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:28,174 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:28,174 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:28,175 INFO  L87              Difference]: Start difference. First operand 6058 states and 10068 transitions. Second operand  has 7 states, 7 states have (on average 494.14285714285717) internal successors, (3459), 7 states have internal predecessors, (3459), 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 22:14:28,542 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:28,542 INFO  L93              Difference]: Finished difference Result 15816 states and 26277 transitions.
[2023-11-06 22:14:28,542 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:28,543 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 494.14285714285717) internal successors, (3459), 7 states have internal predecessors, (3459), 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 4028
[2023-11-06 22:14:28,546 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:28,557 INFO  L225             Difference]: With dead ends: 15816
[2023-11-06 22:14:28,557 INFO  L226             Difference]: Without dead ends: 10872
[2023-11-06 22:14:28,563 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4037 GetRequests, 4025 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 22:14:28,564 INFO  L413           NwaCegarLoop]: 9882 mSDtfsCounter, 22838 mSDsluCounter, 38084 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22838 SdHoareTripleChecker+Valid, 47966 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 22:14:28,564 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22838 Valid, 47966 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:28,573 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10872 states.
[2023-11-06 22:14:28,647 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10872 to 6063.
[2023-11-06 22:14:28,651 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6063 states, 6062 states have (on average 1.661992741669416) internal successors, (10075), 6062 states have internal predecessors, (10075), 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 22:14:28,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 10075 transitions.
[2023-11-06 22:14:28,658 INFO  L78                 Accepts]: Start accepts. Automaton has 6063 states and 10075 transitions. Word has length 4028
[2023-11-06 22:14:28,660 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:28,660 INFO  L495      AbstractCegarLoop]: Abstraction has 6063 states and 10075 transitions.
[2023-11-06 22:14:28,660 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 494.14285714285717) internal successors, (3459), 7 states have internal predecessors, (3459), 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 22:14:28,661 INFO  L276                IsEmpty]: Start isEmpty. Operand 6063 states and 10075 transitions.
[2023-11-06 22:14:28,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4030
[2023-11-06 22:14:28,742 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:28,743 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:14:28,790 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-06 22:14:28,944 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:28,944 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:28,945 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:28,945 INFO  L85        PathProgramCache]: Analyzing trace with hash -291855498, now seen corresponding path program 1 times
[2023-11-06 22:14:28,946 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:28,946 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066879802]
[2023-11-06 22:14:28,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:28,947 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:29,285 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:29,286 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812957415]
[2023-11-06 22:14:29,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:29,287 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:29,287 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:29,288 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:29,289 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-06 22:14:34,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:34,308 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17422 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:34,351 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:34,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked.
[2023-11-06 22:14:34,629 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:34,629 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:34,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066879802]
[2023-11-06 22:14:34,629 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:34,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812957415]
[2023-11-06 22:14:34,629 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812957415] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:34,629 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:34,630 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:34,631 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753411577]
[2023-11-06 22:14:34,631 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:34,633 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:34,633 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:34,637 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:34,637 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:34,638 INFO  L87              Difference]: Start difference. First operand 6063 states and 10075 transitions. Second operand  has 7 states, 7 states have (on average 494.85714285714283) internal successors, (3464), 7 states have internal predecessors, (3464), 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 22:14:35,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:35,006 INFO  L93              Difference]: Finished difference Result 15831 states and 26298 transitions.
[2023-11-06 22:14:35,006 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:35,007 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 494.85714285714283) internal successors, (3464), 7 states have internal predecessors, (3464), 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 4029
[2023-11-06 22:14:35,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:35,019 INFO  L225             Difference]: With dead ends: 15831
[2023-11-06 22:14:35,019 INFO  L226             Difference]: Without dead ends: 10876
[2023-11-06 22:14:35,023 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4038 GetRequests, 4026 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 22:14:35,024 INFO  L413           NwaCegarLoop]: 9872 mSDtfsCounter, 22842 mSDsluCounter, 38054 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22842 SdHoareTripleChecker+Valid, 47926 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 22:14:35,025 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22842 Valid, 47926 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:35,036 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10876 states.
[2023-11-06 22:14:35,104 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10876 to 6068.
[2023-11-06 22:14:35,110 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6068 states, 6067 states have (on average 1.6617768254491512) internal successors, (10082), 6067 states have internal predecessors, (10082), 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 22:14:35,118 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 10082 transitions.
[2023-11-06 22:14:35,118 INFO  L78                 Accepts]: Start accepts. Automaton has 6068 states and 10082 transitions. Word has length 4029
[2023-11-06 22:14:35,120 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:35,120 INFO  L495      AbstractCegarLoop]: Abstraction has 6068 states and 10082 transitions.
[2023-11-06 22:14:35,121 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 494.85714285714283) internal successors, (3464), 7 states have internal predecessors, (3464), 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 22:14:35,121 INFO  L276                IsEmpty]: Start isEmpty. Operand 6068 states and 10082 transitions.
[2023-11-06 22:14:35,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4031
[2023-11-06 22:14:35,221 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:35,222 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:14:35,269 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-06 22:14:35,423 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:35,423 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:35,423 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:35,424 INFO  L85        PathProgramCache]: Analyzing trace with hash 682227812, now seen corresponding path program 1 times
[2023-11-06 22:14:35,425 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:35,425 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725664388]
[2023-11-06 22:14:35,425 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:35,425 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:35,770 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:35,771 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730567922]
[2023-11-06 22:14:35,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:35,772 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:35,772 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:35,773 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:35,804 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-06 22:14:40,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:40,841 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17425 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:40,885 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:41,185 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked.
[2023-11-06 22:14:41,185 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:41,186 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:41,186 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725664388]
[2023-11-06 22:14:41,186 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:41,186 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730567922]
[2023-11-06 22:14:41,186 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [730567922] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:41,186 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:41,187 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:41,187 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306924050]
[2023-11-06 22:14:41,187 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:41,190 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:41,190 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:41,193 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:41,193 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:41,194 INFO  L87              Difference]: Start difference. First operand 6068 states and 10082 transitions. Second operand  has 7 states, 7 states have (on average 495.57142857142856) internal successors, (3469), 7 states have internal predecessors, (3469), 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 22:14:41,565 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:41,566 INFO  L93              Difference]: Finished difference Result 15846 states and 26319 transitions.
[2023-11-06 22:14:41,566 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:41,567 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 495.57142857142856) internal successors, (3469), 7 states have internal predecessors, (3469), 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 4030
[2023-11-06 22:14:41,571 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:41,580 INFO  L225             Difference]: With dead ends: 15846
[2023-11-06 22:14:41,580 INFO  L226             Difference]: Without dead ends: 10880
[2023-11-06 22:14:41,584 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4039 GetRequests, 4027 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 22:14:41,585 INFO  L413           NwaCegarLoop]: 9862 mSDtfsCounter, 22846 mSDsluCounter, 38024 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22846 SdHoareTripleChecker+Valid, 47886 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 22:14:41,585 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22846 Valid, 47886 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:41,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10880 states.
[2023-11-06 22:14:41,672 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10880 to 6073.
[2023-11-06 22:14:41,678 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6073 states, 6072 states have (on average 1.6615612648221343) internal successors, (10089), 6072 states have internal predecessors, (10089), 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 22:14:41,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 10089 transitions.
[2023-11-06 22:14:41,687 INFO  L78                 Accepts]: Start accepts. Automaton has 6073 states and 10089 transitions. Word has length 4030
[2023-11-06 22:14:41,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:41,690 INFO  L495      AbstractCegarLoop]: Abstraction has 6073 states and 10089 transitions.
[2023-11-06 22:14:41,691 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 495.57142857142856) internal successors, (3469), 7 states have internal predecessors, (3469), 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 22:14:41,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 6073 states and 10089 transitions.
[2023-11-06 22:14:41,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4032
[2023-11-06 22:14:41,783 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:41,785 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:14:41,833 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-06 22:14:41,986 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-06 22:14:41,986 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:41,986 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:41,987 INFO  L85        PathProgramCache]: Analyzing trace with hash -1259752958, now seen corresponding path program 1 times
[2023-11-06 22:14:41,987 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:41,988 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560541642]
[2023-11-06 22:14:41,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:41,988 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:42,317 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:42,317 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102153003]
[2023-11-06 22:14:42,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:42,319 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:42,319 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:42,320 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:42,344 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-06 22:14:47,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:47,370 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17428 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:47,416 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:47,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked.
[2023-11-06 22:14:47,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:47,691 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:47,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560541642]
[2023-11-06 22:14:47,692 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:47,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102153003]
[2023-11-06 22:14:47,692 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102153003] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:47,692 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:47,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:47,693 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982160972]
[2023-11-06 22:14:47,693 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:47,696 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:47,697 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:47,699 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:47,700 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:47,701 INFO  L87              Difference]: Start difference. First operand 6073 states and 10089 transitions. Second operand  has 7 states, 7 states have (on average 496.2857142857143) internal successors, (3474), 7 states have internal predecessors, (3474), 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 22:14:48,070 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:48,070 INFO  L93              Difference]: Finished difference Result 15861 states and 26340 transitions.
[2023-11-06 22:14:48,071 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:48,072 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 496.2857142857143) internal successors, (3474), 7 states have internal predecessors, (3474), 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 4031
[2023-11-06 22:14:48,074 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:48,083 INFO  L225             Difference]: With dead ends: 15861
[2023-11-06 22:14:48,083 INFO  L226             Difference]: Without dead ends: 10884
[2023-11-06 22:14:48,089 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4040 GetRequests, 4028 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 22:14:48,089 INFO  L413           NwaCegarLoop]: 9852 mSDtfsCounter, 22850 mSDsluCounter, 37994 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22850 SdHoareTripleChecker+Valid, 47846 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 22:14:48,090 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22850 Valid, 47846 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:48,101 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10884 states.
[2023-11-06 22:14:48,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 6078.
[2023-11-06 22:14:48,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6078 states, 6077 states have (on average 1.6613460589106468) internal successors, (10096), 6077 states have internal predecessors, (10096), 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 22:14:48,174 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 10096 transitions.
[2023-11-06 22:14:48,175 INFO  L78                 Accepts]: Start accepts. Automaton has 6078 states and 10096 transitions. Word has length 4031
[2023-11-06 22:14:48,176 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:48,177 INFO  L495      AbstractCegarLoop]: Abstraction has 6078 states and 10096 transitions.
[2023-11-06 22:14:48,177 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 496.2857142857143) internal successors, (3474), 7 states have internal predecessors, (3474), 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 22:14:48,177 INFO  L276                IsEmpty]: Start isEmpty. Operand 6078 states and 10096 transitions.
[2023-11-06 22:14:48,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4033
[2023-11-06 22:14:48,286 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:48,288 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:14:48,350 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-06 22:14:48,515 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:48,516 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:48,516 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:48,517 INFO  L85        PathProgramCache]: Analyzing trace with hash -979412264, now seen corresponding path program 1 times
[2023-11-06 22:14:48,517 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:48,517 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420966249]
[2023-11-06 22:14:48,518 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:48,518 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:48,846 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:48,846 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766864983]
[2023-11-06 22:14:48,846 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:48,847 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:48,847 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:48,848 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:48,849 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-06 22:14:53,670 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:14:53,770 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17431 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:14:53,813 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:14:54,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked.
[2023-11-06 22:14:54,098 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:14:54,098 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:14:54,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420966249]
[2023-11-06 22:14:54,098 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:14:54,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766864983]
[2023-11-06 22:14:54,098 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [766864983] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:14:54,098 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:14:54,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:14:54,100 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110211684]
[2023-11-06 22:14:54,100 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:14:54,102 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:14:54,102 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:14:54,104 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:14:54,104 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:14:54,105 INFO  L87              Difference]: Start difference. First operand 6078 states and 10096 transitions. Second operand  has 7 states, 7 states have (on average 497.0) internal successors, (3479), 7 states have internal predecessors, (3479), 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 22:14:54,474 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:14:54,474 INFO  L93              Difference]: Finished difference Result 15876 states and 26361 transitions.
[2023-11-06 22:14:54,474 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:14:54,475 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 497.0) internal successors, (3479), 7 states have internal predecessors, (3479), 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 4032
[2023-11-06 22:14:54,478 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:14:54,576 INFO  L225             Difference]: With dead ends: 15876
[2023-11-06 22:14:54,577 INFO  L226             Difference]: Without dead ends: 10888
[2023-11-06 22:14:54,580 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4041 GetRequests, 4029 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 22:14:54,581 INFO  L413           NwaCegarLoop]: 9842 mSDtfsCounter, 22854 mSDsluCounter, 37964 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22854 SdHoareTripleChecker+Valid, 47806 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 22:14:54,581 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22854 Valid, 47806 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:14:54,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10888 states.
[2023-11-06 22:14:54,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10888 to 6083.
[2023-11-06 22:14:54,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6083 states, 6082 states have (on average 1.6611312068398554) internal successors, (10103), 6082 states have internal predecessors, (10103), 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 22:14:54,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 10103 transitions.
[2023-11-06 22:14:54,651 INFO  L78                 Accepts]: Start accepts. Automaton has 6083 states and 10103 transitions. Word has length 4032
[2023-11-06 22:14:54,653 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:14:54,653 INFO  L495      AbstractCegarLoop]: Abstraction has 6083 states and 10103 transitions.
[2023-11-06 22:14:54,654 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 497.0) internal successors, (3479), 7 states have internal predecessors, (3479), 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 22:14:54,654 INFO  L276                IsEmpty]: Start isEmpty. Operand 6083 states and 10103 transitions.
[2023-11-06 22:14:54,728 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4034
[2023-11-06 22:14:54,728 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:14:54,729 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:14:54,789 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-06 22:14:54,944 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-06 22:14:54,945 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:14:54,945 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:14:54,946 INFO  L85        PathProgramCache]: Analyzing trace with hash -680153458, now seen corresponding path program 1 times
[2023-11-06 22:14:54,946 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:14:54,946 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336448042]
[2023-11-06 22:14:54,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:54,947 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:14:55,265 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:14:55,265 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201308196]
[2023-11-06 22:14:55,266 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:14:55,266 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:14:55,266 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:14:55,267 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:14:55,268 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-06 22:15:00,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:15:00,178 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17434 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:15:00,223 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:15:00,502 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2023-11-06 22:15:00,502 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:15:00,502 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:15:00,502 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336448042]
[2023-11-06 22:15:00,502 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:15:00,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201308196]
[2023-11-06 22:15:00,503 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [201308196] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:15:00,503 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:15:00,504 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:15:00,504 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878224321]
[2023-11-06 22:15:00,504 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:15:00,507 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:15:00,508 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:15:00,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:15:00,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:15:00,513 INFO  L87              Difference]: Start difference. First operand 6083 states and 10103 transitions. Second operand  has 7 states, 7 states have (on average 497.42857142857144) internal successors, (3482), 7 states have internal predecessors, (3482), 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 22:15:00,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:15:00,926 INFO  L93              Difference]: Finished difference Result 15888 states and 26377 transitions.
[2023-11-06 22:15:00,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:15:00,927 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 497.42857142857144) internal successors, (3482), 7 states have internal predecessors, (3482), 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 4033
[2023-11-06 22:15:00,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:15:00,939 INFO  L225             Difference]: With dead ends: 15888
[2023-11-06 22:15:00,939 INFO  L226             Difference]: Without dead ends: 10889
[2023-11-06 22:15:00,944 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4042 GetRequests, 4030 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 22:15:00,944 INFO  L413           NwaCegarLoop]: 9837 mSDtfsCounter, 22855 mSDsluCounter, 37949 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22855 SdHoareTripleChecker+Valid, 47786 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 22:15:00,945 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22855 Valid, 47786 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:15:00,954 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10889 states.
[2023-11-06 22:15:01,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10889 to 6085.
[2023-11-06 22:15:01,024 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6085 states, 6084 states have (on average 1.660913872452334) internal successors, (10105), 6084 states have internal predecessors, (10105), 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 22:15:01,032 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6085 states to 6085 states and 10105 transitions.
[2023-11-06 22:15:01,032 INFO  L78                 Accepts]: Start accepts. Automaton has 6085 states and 10105 transitions. Word has length 4033
[2023-11-06 22:15:01,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:15:01,034 INFO  L495      AbstractCegarLoop]: Abstraction has 6085 states and 10105 transitions.
[2023-11-06 22:15:01,035 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 497.42857142857144) internal successors, (3482), 7 states have internal predecessors, (3482), 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 22:15:01,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 6085 states and 10105 transitions.
[2023-11-06 22:15:01,107 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4035
[2023-11-06 22:15:01,108 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:15:01,109 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:15:01,164 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0
[2023-11-06 22:15:01,309 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-06 22:15:01,310 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:15:01,310 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:15:01,311 INFO  L85        PathProgramCache]: Analyzing trace with hash -1791324238, now seen corresponding path program 1 times
[2023-11-06 22:15:01,311 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:15:01,311 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835164699]
[2023-11-06 22:15:01,312 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:01,312 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:15:01,682 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:15:01,682 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257075374]
[2023-11-06 22:15:01,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:01,683 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:15:01,684 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:15:01,685 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:15:01,688 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-06 22:15:06,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:15:06,698 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17437 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:15:06,763 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:15:07,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked.
[2023-11-06 22:15:07,053 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:15:07,053 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:15:07,053 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835164699]
[2023-11-06 22:15:07,053 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:15:07,053 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257075374]
[2023-11-06 22:15:07,053 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257075374] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:15:07,053 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:15:07,054 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:15:07,054 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050697418]
[2023-11-06 22:15:07,055 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:15:07,057 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:15:07,057 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:15:07,060 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:15:07,060 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:15:07,061 INFO  L87              Difference]: Start difference. First operand 6085 states and 10105 transitions. Second operand  has 7 states, 7 states have (on average 498.14285714285717) internal successors, (3487), 7 states have internal predecessors, (3487), 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 22:15:07,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:15:07,439 INFO  L93              Difference]: Finished difference Result 15897 states and 26388 transitions.
[2023-11-06 22:15:07,440 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:15:07,441 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 498.14285714285717) internal successors, (3487), 7 states have internal predecessors, (3487), 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 4034
[2023-11-06 22:15:07,443 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:15:07,452 INFO  L225             Difference]: With dead ends: 15897
[2023-11-06 22:15:07,453 INFO  L226             Difference]: Without dead ends: 10893
[2023-11-06 22:15:07,456 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4043 GetRequests, 4031 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 22:15:07,457 INFO  L413           NwaCegarLoop]: 9827 mSDtfsCounter, 22857 mSDsluCounter, 37919 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22857 SdHoareTripleChecker+Valid, 47746 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 22:15:07,457 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22857 Valid, 47746 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:15:07,466 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10893 states.
[2023-11-06 22:15:07,532 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10893 to 6090.
[2023-11-06 22:15:07,537 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6090 states, 6089 states have (on average 1.6606996222696666) internal successors, (10112), 6089 states have internal predecessors, (10112), 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 22:15:07,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6090 states to 6090 states and 10112 transitions.
[2023-11-06 22:15:07,546 INFO  L78                 Accepts]: Start accepts. Automaton has 6090 states and 10112 transitions. Word has length 4034
[2023-11-06 22:15:07,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:15:07,549 INFO  L495      AbstractCegarLoop]: Abstraction has 6090 states and 10112 transitions.
[2023-11-06 22:15:07,550 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 498.14285714285717) internal successors, (3487), 7 states have internal predecessors, (3487), 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 22:15:07,550 INFO  L276                IsEmpty]: Start isEmpty. Operand 6090 states and 10112 transitions.
[2023-11-06 22:15:07,701 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4036
[2023-11-06 22:15:07,701 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:15:07,703 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, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:15:07,758 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2023-11-06 22:15:07,912 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-06 22:15:07,913 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:15:07,913 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:15:07,915 INFO  L85        PathProgramCache]: Analyzing trace with hash 588884376, now seen corresponding path program 1 times
[2023-11-06 22:15:07,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:15:07,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380828399]
[2023-11-06 22:15:07,916 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:07,917 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:15:08,373 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:15:08,373 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639343956]
[2023-11-06 22:15:08,375 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:08,375 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:15:08,375 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:15:08,376 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:15:08,378 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-06 22:15:13,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:15:13,340 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17441 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:15:13,393 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:15:13,671 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked.
[2023-11-06 22:15:13,671 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:15:13,671 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:15:13,671 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380828399]
[2023-11-06 22:15:13,672 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:15:13,672 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639343956]
[2023-11-06 22:15:13,672 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639343956] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:15:13,672 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:15:13,673 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:15:13,673 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011142713]
[2023-11-06 22:15:13,674 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:15:13,677 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:15:13,677 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:15:13,680 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:15:13,680 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:15:13,682 INFO  L87              Difference]: Start difference. First operand 6090 states and 10112 transitions. Second operand  has 7 states, 7 states have (on average 498.85714285714283) internal successors, (3492), 7 states have internal predecessors, (3492), 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 22:15:14,065 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:15:14,065 INFO  L93              Difference]: Finished difference Result 15912 states and 26409 transitions.
[2023-11-06 22:15:14,065 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:15:14,066 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 498.85714285714283) internal successors, (3492), 7 states have internal predecessors, (3492), 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 4035
[2023-11-06 22:15:14,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:15:14,078 INFO  L225             Difference]: With dead ends: 15912
[2023-11-06 22:15:14,078 INFO  L226             Difference]: Without dead ends: 10897
[2023-11-06 22:15:14,082 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4044 GetRequests, 4032 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 22:15:14,083 INFO  L413           NwaCegarLoop]: 9817 mSDtfsCounter, 22861 mSDsluCounter, 37889 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22861 SdHoareTripleChecker+Valid, 47706 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 22:15:14,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22861 Valid, 47706 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:15:14,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10897 states.
[2023-11-06 22:15:14,145 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 6095.
[2023-11-06 22:15:14,150 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6095 states, 6094 states have (on average 1.660485723662619) internal successors, (10119), 6094 states have internal predecessors, (10119), 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 22:15:14,156 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 10119 transitions.
[2023-11-06 22:15:14,156 INFO  L78                 Accepts]: Start accepts. Automaton has 6095 states and 10119 transitions. Word has length 4035
[2023-11-06 22:15:14,157 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:15:14,158 INFO  L495      AbstractCegarLoop]: Abstraction has 6095 states and 10119 transitions.
[2023-11-06 22:15:14,158 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 498.85714285714283) internal successors, (3492), 7 states have internal predecessors, (3492), 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 22:15:14,158 INFO  L276                IsEmpty]: Start isEmpty. Operand 6095 states and 10119 transitions.
[2023-11-06 22:15:14,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4037
[2023-11-06 22:15:14,226 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:15:14,227 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:15:14,275 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-06 22:15:14,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-06 22:15:14,441 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:15:14,441 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:15:14,442 INFO  L85        PathProgramCache]: Analyzing trace with hash -371024092, now seen corresponding path program 1 times
[2023-11-06 22:15:14,442 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:15:14,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884458019]
[2023-11-06 22:15:14,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:14,443 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:15:14,797 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:15:14,797 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943262918]
[2023-11-06 22:15:14,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:14,798 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:15:14,799 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:15:14,799 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:15:14,801 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-06 22:15:19,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:15:19,759 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17444 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:15:19,806 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:15:20,099 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked.
[2023-11-06 22:15:20,099 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:15:20,099 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:15:20,099 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884458019]
[2023-11-06 22:15:20,099 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:15:20,100 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943262918]
[2023-11-06 22:15:20,100 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943262918] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:15:20,100 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:15:20,101 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:15:20,101 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959215199]
[2023-11-06 22:15:20,102 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:15:20,105 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:15:20,105 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:15:20,108 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:15:20,108 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:15:20,110 INFO  L87              Difference]: Start difference. First operand 6095 states and 10119 transitions. Second operand  has 7 states, 7 states have (on average 499.57142857142856) internal successors, (3497), 7 states have internal predecessors, (3497), 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 22:15:20,490 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:15:20,491 INFO  L93              Difference]: Finished difference Result 15927 states and 26430 transitions.
[2023-11-06 22:15:20,491 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:15:20,492 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 499.57142857142856) internal successors, (3497), 7 states have internal predecessors, (3497), 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 4036
[2023-11-06 22:15:20,495 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:15:20,507 INFO  L225             Difference]: With dead ends: 15927
[2023-11-06 22:15:20,507 INFO  L226             Difference]: Without dead ends: 10901
[2023-11-06 22:15:20,511 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4045 GetRequests, 4033 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 22:15:20,512 INFO  L413           NwaCegarLoop]: 9807 mSDtfsCounter, 22865 mSDsluCounter, 37859 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22865 SdHoareTripleChecker+Valid, 47666 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 22:15:20,512 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22865 Valid, 47666 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:15:20,523 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10901 states.
[2023-11-06 22:15:20,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 6100.
[2023-11-06 22:15:20,595 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6100 states, 6099 states have (on average 1.660272175766519) internal successors, (10126), 6099 states have internal predecessors, (10126), 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 22:15:20,601 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6100 states to 6100 states and 10126 transitions.
[2023-11-06 22:15:20,601 INFO  L78                 Accepts]: Start accepts. Automaton has 6100 states and 10126 transitions. Word has length 4036
[2023-11-06 22:15:20,603 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:15:20,603 INFO  L495      AbstractCegarLoop]: Abstraction has 6100 states and 10126 transitions.
[2023-11-06 22:15:20,604 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 499.57142857142856) internal successors, (3497), 7 states have internal predecessors, (3497), 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 22:15:20,604 INFO  L276                IsEmpty]: Start isEmpty. Operand 6100 states and 10126 transitions.
[2023-11-06 22:15:20,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4038
[2023-11-06 22:15:20,673 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:15:20,674 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, 2, 2, 2, 2, 2, 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[2023-11-06 22:15:20,740 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0
[2023-11-06 22:15:20,888 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8a1e64-5656-4f4a-a7e0-d180d3e65a5f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-06 22:15:20,889 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:15:20,889 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:15:20,890 INFO  L85        PathProgramCache]: Analyzing trace with hash 590679330, now seen corresponding path program 1 times
[2023-11-06 22:15:20,890 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:15:20,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553340442]
[2023-11-06 22:15:20,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:15:20,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms