./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/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 dd5fdfe55e76a8215ab52f8dad5f7d2612a1a041172d3f103021fd3aab9254b7
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:02:40,574 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:02:40,706 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:02:40,718 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:02:40,719 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:02:40,764 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:02:40,765 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:02:40,766 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:02:40,768 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:02:40,775 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:02:40,776 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:02:40,776 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:02:40,777 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:02:40,777 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:02:40,778 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:02:40,778 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:02:40,778 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:02:40,779 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:02:40,779 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:02:40,780 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:02:40,780 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:02:40,781 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:02:40,782 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:02:40,782 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:02:40,783 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:02:40,783 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:02:40,784 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:02:40,784 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:02:40,785 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:02:40,785 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:02:40,786 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:02:40,787 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:02:40,788 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:02:40,788 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:02:40,788 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:02:40,789 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:02:40,790 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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/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 -> dd5fdfe55e76a8215ab52f8dad5f7d2612a1a041172d3f103021fd3aab9254b7
[2023-11-06 22:02:41,122 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:02:41,146 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:02:41,150 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:02:41,151 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:02:41,152 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:02:41,154 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c
[2023-11-06 22:02:44,455 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:02:45,058 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:02:45,061 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c
[2023-11-06 22:02:45,110 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/data/17069dcc4/f40a62612f2e4648bd3e37a9938aba10/FLAGdd83b3f2a
[2023-11-06 22:02:45,131 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/data/17069dcc4/f40a62612f2e4648bd3e37a9938aba10
[2023-11-06 22:02:45,137 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:02:45,141 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:02:45,143 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:02:45,145 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:02:45,151 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:02:45,152 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:45" (1/1) ...
[2023-11-06 22:02:45,154 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b66d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:45, skipping insertion in model container
[2023-11-06 22:02:45,154 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:45" (1/1) ...
[2023-11-06 22:02:45,328 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:02:45,755 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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c[1172,1185]
[2023-11-06 22:02:46,950 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:02:46,964 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:02:46,979 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_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.2.prop1-func-interl.c[1172,1185]
[2023-11-06 22:02:47,871 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:02:47,906 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:02:47,919 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47 WrapperNode
[2023-11-06 22:02:47,919 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:02:47,921 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:02:47,921 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:02:47,921 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:02:47,930 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:48,328 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:52,279 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31366
[2023-11-06 22:02:52,279 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:02:52,280 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:02:52,281 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:02:52,281 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:02:52,291 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:52,292 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:53,127 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:53,128 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:54,225 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:54,433 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:54,994 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:55,116 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:56,099 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:02:56,104 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:02:56,105 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:02:56,105 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:02:56,106 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (1/1) ...
[2023-11-06 22:02:56,116 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:02:56,134 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:02:56,149 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:02:56,151 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:02:56,184 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:02:56,185 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:02:56,185 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:02:56,185 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:02:57,667 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:02:57,669 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:03:20,084 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:03:20,131 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:03:20,131 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:03:20,143 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:03:20 BoogieIcfgContainer
[2023-11-06 22:03:20,143 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:03:20,150 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:03:20,150 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:03:20,154 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:03:20,154 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:45" (1/3) ...
[2023-11-06 22:03:20,156 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd84c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:03:20, skipping insertion in model container
[2023-11-06 22:03:20,157 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47" (2/3) ...
[2023-11-06 22:03:20,158 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd84c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:03:20, skipping insertion in model container
[2023-11-06 22:03:20,160 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:03:20" (3/3) ...
[2023-11-06 22:03:20,162 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lifts.2.prop1-func-interl.c
[2023-11-06 22:03:20,189 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:03:20,190 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:03:20,404 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:03:20,415 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;@1e4ee5cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:03:20,416 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:03:20,449 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 7184 states, 7182 states have (on average 1.6672236145920356) internal successors, (11974), 7183 states have internal predecessors, (11974), 0 states have call successors, (0), 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 22:03:20,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2023-11-06 22:03:20,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:20,482 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]
[2023-11-06 22:03:20,482 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:20,488 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:20,489 INFO  L85        PathProgramCache]: Analyzing trace with hash -1040385535, now seen corresponding path program 1 times
[2023-11-06 22:03:20,500 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:20,500 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317448982]
[2023-11-06 22:03:20,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:20,502 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:21,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:22,853 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 22:03:22,857 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:22,857 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317448982]
[2023-11-06 22:03:22,858 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317448982] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:22,859 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:22,859 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:03:22,861 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291091411]
[2023-11-06 22:03:22,863 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:22,872 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:03:22,873 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:22,928 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:03:22,929 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:03:22,950 INFO  L87              Difference]: Start difference. First operand  has 7184 states, 7182 states have (on average 1.6672236145920356) internal successors, (11974), 7183 states have internal predecessors, (11974), 0 states have call successors, (0), 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 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 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 22:03:23,596 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:23,596 INFO  L93              Difference]: Finished difference Result 14166 states and 23616 transitions.
[2023-11-06 22:03:23,600 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:03:23,602 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 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 333
[2023-11-06 22:03:23,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:23,681 INFO  L225             Difference]: With dead ends: 14166
[2023-11-06 22:03:23,682 INFO  L226             Difference]: Without dead ends: 7182
[2023-11-06 22:03:23,705 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 22:03:23,711 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 1 mSDsluCounter, 23926 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35892 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:23,712 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35892 Invalid, 11 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:03:23,753 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7182 states.
[2023-11-06 22:03:23,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 7182.
[2023-11-06 22:03:23,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7182 states, 7181 states have (on average 1.6668987606182983) internal successors, (11970), 7181 states have internal predecessors, (11970), 0 states have call successors, (0), 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 22:03:24,191 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 11970 transitions.
[2023-11-06 22:03:24,193 INFO  L78                 Accepts]: Start accepts. Automaton has 7182 states and 11970 transitions. Word has length 333
[2023-11-06 22:03:24,198 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:24,198 INFO  L495      AbstractCegarLoop]: Abstraction has 7182 states and 11970 transitions.
[2023-11-06 22:03:24,199 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 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 22:03:24,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 7182 states and 11970 transitions.
[2023-11-06 22:03:24,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 335
[2023-11-06 22:03:24,214 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:24,214 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]
[2023-11-06 22:03:24,215 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:03:24,215 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:24,216 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:24,216 INFO  L85        PathProgramCache]: Analyzing trace with hash 2109513699, now seen corresponding path program 1 times
[2023-11-06 22:03:24,217 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:24,217 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231585810]
[2023-11-06 22:03:24,217 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:24,218 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:24,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:25,175 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 22:03:25,176 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:25,177 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231585810]
[2023-11-06 22:03:25,177 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231585810] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:25,177 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:25,178 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:03:25,178 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287541323]
[2023-11-06 22:03:25,178 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:25,182 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:03:25,182 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:25,184 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:03:25,184 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:03:25,185 INFO  L87              Difference]: Start difference. First operand 7182 states and 11970 transitions. Second operand  has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 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 22:03:25,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:25,790 INFO  L93              Difference]: Finished difference Result 14167 states and 23612 transitions.
[2023-11-06 22:03:25,791 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:03:25,791 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 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 334
[2023-11-06 22:03:25,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:25,832 INFO  L225             Difference]: With dead ends: 14167
[2023-11-06 22:03:25,832 INFO  L226             Difference]: Without dead ends: 7185
[2023-11-06 22:03:25,846 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 22:03:25,849 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 1 mSDsluCounter, 23923 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35889 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:25,849 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35889 Invalid, 14 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:03:25,869 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7185 states.
[2023-11-06 22:03:26,012 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 7184.
[2023-11-06 22:03:26,036 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7184 states, 7183 states have (on average 1.666713072532368) internal successors, (11972), 7183 states have internal predecessors, (11972), 0 states have call successors, (0), 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 22:03:26,078 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 11972 transitions.
[2023-11-06 22:03:26,079 INFO  L78                 Accepts]: Start accepts. Automaton has 7184 states and 11972 transitions. Word has length 334
[2023-11-06 22:03:26,080 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:26,080 INFO  L495      AbstractCegarLoop]: Abstraction has 7184 states and 11972 transitions.
[2023-11-06 22:03:26,081 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 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 22:03:26,081 INFO  L276                IsEmpty]: Start isEmpty. Operand 7184 states and 11972 transitions.
[2023-11-06 22:03:26,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 336
[2023-11-06 22:03:26,087 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:26,087 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]
[2023-11-06 22:03:26,088 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:03:26,088 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:26,099 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:26,099 INFO  L85        PathProgramCache]: Analyzing trace with hash 759984731, now seen corresponding path program 1 times
[2023-11-06 22:03:26,100 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:26,101 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24773252]
[2023-11-06 22:03:26,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:26,101 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:26,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:27,176 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 22:03:27,177 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:27,177 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24773252]
[2023-11-06 22:03:27,177 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24773252] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:27,178 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:27,178 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:03:27,179 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050657658]
[2023-11-06 22:03:27,179 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:27,180 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:03:27,180 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:27,181 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:03:27,182 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:03:27,182 INFO  L87              Difference]: Start difference. First operand 7184 states and 11972 transitions. Second operand  has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 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 22:03:28,022 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:28,022 INFO  L93              Difference]: Finished difference Result 21430 states and 35717 transitions.
[2023-11-06 22:03:28,023 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:03:28,023 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 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 335
[2023-11-06 22:03:28,024 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:28,099 INFO  L225             Difference]: With dead ends: 21430
[2023-11-06 22:03:28,099 INFO  L226             Difference]: Without dead ends: 14446
[2023-11-06 22:03:28,112 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 22:03:28,113 INFO  L413           NwaCegarLoop]: 12438 mSDtfsCounter, 47001 mSDsluCounter, 23922 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47001 SdHoareTripleChecker+Valid, 36360 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:28,114 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [47001 Valid, 36360 Invalid, 20 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:03:28,142 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14446 states.
[2023-11-06 22:03:28,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14446 to 7474.
[2023-11-06 22:03:28,350 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7474 states, 7473 states have (on average 1.66653285159909) internal successors, (12454), 7473 states have internal predecessors, (12454), 0 states have call successors, (0), 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 22:03:28,373 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7474 states to 7474 states and 12454 transitions.
[2023-11-06 22:03:28,374 INFO  L78                 Accepts]: Start accepts. Automaton has 7474 states and 12454 transitions. Word has length 335
[2023-11-06 22:03:28,375 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:28,375 INFO  L495      AbstractCegarLoop]: Abstraction has 7474 states and 12454 transitions.
[2023-11-06 22:03:28,376 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 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 22:03:28,376 INFO  L276                IsEmpty]: Start isEmpty. Operand 7474 states and 12454 transitions.
[2023-11-06 22:03:28,920 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:03:28,921 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:28,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:03:28,925 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:03:28,925 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:28,926 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:28,928 INFO  L85        PathProgramCache]: Analyzing trace with hash 864946308, now seen corresponding path program 1 times
[2023-11-06 22:03:28,929 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:28,929 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283122716]
[2023-11-06 22:03:28,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:28,931 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:29,739 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:03:29,740 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472530454]
[2023-11-06 22:03:29,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:29,742 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:29,743 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:03:29,747 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:03:29,759 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:03:37,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:37,555 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21597 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:03:37,757 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:03:38,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:03:38,146 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:03:38,147 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:38,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283122716]
[2023-11-06 22:03:38,147 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:03:38,148 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472530454]
[2023-11-06 22:03:38,148 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [472530454] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:38,148 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:38,150 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:03:38,151 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858174462]
[2023-11-06 22:03:38,151 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:38,160 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:03:38,161 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:38,169 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:03:38,173 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:03:38,176 INFO  L87              Difference]: Start difference. First operand 7474 states and 12454 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:38,592 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:38,593 INFO  L93              Difference]: Finished difference Result 14468 states and 24110 transitions.
[2023-11-06 22:03:38,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:03:38,596 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:03:38,598 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:38,616 INFO  L225             Difference]: With dead ends: 14468
[2023-11-06 22:03:38,616 INFO  L226             Difference]: Without dead ends: 7484
[2023-11-06 22:03:38,628 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:03:38,638 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:38,640 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:03:38,666 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7484 states.
[2023-11-06 22:03:38,830 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 7476.
[2023-11-06 22:03:38,843 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7476 states, 7475 states have (on average 1.6663545150501673) internal successors, (12456), 7475 states have internal predecessors, (12456), 0 states have call successors, (0), 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 22:03:38,874 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7476 states to 7476 states and 12456 transitions.
[2023-11-06 22:03:38,875 INFO  L78                 Accepts]: Start accepts. Automaton has 7476 states and 12456 transitions. Word has length 4958
[2023-11-06 22:03:38,877 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:38,878 INFO  L495      AbstractCegarLoop]: Abstraction has 7476 states and 12456 transitions.
[2023-11-06 22:03:38,880 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:38,880 INFO  L276                IsEmpty]: Start isEmpty. Operand 7476 states and 12456 transitions.
[2023-11-06 22:03:39,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:03:39,166 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:39,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:03:39,255 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:03:39,387 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:39,388 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:39,388 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:39,390 INFO  L85        PathProgramCache]: Analyzing trace with hash -653106350, now seen corresponding path program 1 times
[2023-11-06 22:03:39,390 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:39,390 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646871038]
[2023-11-06 22:03:39,391 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:39,391 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:40,286 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:03:40,286 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713445680]
[2023-11-06 22:03:40,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:40,288 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:40,289 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:03:40,290 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:03:40,294 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:03:47,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:47,470 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21598 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:03:47,627 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:03:47,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:03:47,884 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:03:47,884 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:47,885 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646871038]
[2023-11-06 22:03:47,885 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:03:47,885 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713445680]
[2023-11-06 22:03:47,885 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713445680] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:47,885 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:47,887 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:03:47,888 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113779688]
[2023-11-06 22:03:47,888 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:47,897 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:03:47,897 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:47,905 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:03:47,906 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:03:47,908 INFO  L87              Difference]: Start difference. First operand 7476 states and 12456 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:48,270 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:48,271 INFO  L93              Difference]: Finished difference Result 14471 states and 24112 transitions.
[2023-11-06 22:03:48,272 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:03:48,274 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:03:48,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:48,291 INFO  L225             Difference]: With dead ends: 14471
[2023-11-06 22:03:48,292 INFO  L226             Difference]: Without dead ends: 7485
[2023-11-06 22:03:48,301 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:03:48,302 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:48,303 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:03:48,319 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7485 states.
[2023-11-06 22:03:48,450 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7485 to 7477.
[2023-11-06 22:03:48,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7477 states, 7476 states have (on average 1.6662653825575173) internal successors, (12457), 7476 states have internal predecessors, (12457), 0 states have call successors, (0), 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 22:03:48,485 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 12457 transitions.
[2023-11-06 22:03:48,485 INFO  L78                 Accepts]: Start accepts. Automaton has 7477 states and 12457 transitions. Word has length 4958
[2023-11-06 22:03:48,488 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:48,488 INFO  L495      AbstractCegarLoop]: Abstraction has 7477 states and 12457 transitions.
[2023-11-06 22:03:48,490 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:48,490 INFO  L276                IsEmpty]: Start isEmpty. Operand 7477 states and 12457 transitions.
[2023-11-06 22:03:48,869 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:03:48,869 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:48,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:03:48,939 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:03:49,096 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:49,097 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:49,097 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:49,099 INFO  L85        PathProgramCache]: Analyzing trace with hash 681444128, now seen corresponding path program 1 times
[2023-11-06 22:03:49,100 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:49,100 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093724574]
[2023-11-06 22:03:49,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:49,101 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:50,001 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:03:50,002 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044269861]
[2023-11-06 22:03:50,006 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:50,008 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:50,008 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:03:50,009 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:03:50,039 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:03:56,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:56,836 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21599 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:03:56,960 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:03:57,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:03:57,454 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:03:57,455 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:57,455 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093724574]
[2023-11-06 22:03:57,455 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:03:57,455 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044269861]
[2023-11-06 22:03:57,455 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044269861] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:03:57,456 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:03:57,457 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:03:57,458 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743277338]
[2023-11-06 22:03:57,458 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:57,465 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:03:57,465 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:57,471 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:03:57,471 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:03:57,473 INFO  L87              Difference]: Start difference. First operand 7477 states and 12457 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:57,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:03:57,861 INFO  L93              Difference]: Finished difference Result 14473 states and 24114 transitions.
[2023-11-06 22:03:57,867 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:03:57,869 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:03:57,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:03:57,886 INFO  L225             Difference]: With dead ends: 14473
[2023-11-06 22:03:57,886 INFO  L226             Difference]: Without dead ends: 7486
[2023-11-06 22:03:57,894 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:03:57,895 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-06 22:03:57,895 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-06 22:03:57,909 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7486 states.
[2023-11-06 22:03:58,006 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 7478.
[2023-11-06 22:03:58,017 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7478 states, 7477 states have (on average 1.666176273906647) internal successors, (12458), 7477 states have internal predecessors, (12458), 0 states have call successors, (0), 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 22:03:58,032 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 12458 transitions.
[2023-11-06 22:03:58,032 INFO  L78                 Accepts]: Start accepts. Automaton has 7478 states and 12458 transitions. Word has length 4958
[2023-11-06 22:03:58,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:03:58,034 INFO  L495      AbstractCegarLoop]: Abstraction has 7478 states and 12458 transitions.
[2023-11-06 22:03:58,036 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:03:58,037 INFO  L276                IsEmpty]: Start isEmpty. Operand 7478 states and 12458 transitions.
[2023-11-06 22:03:58,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:03:58,290 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:03:58,293 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:03:58,367 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:03:58,519 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 22:03:58,520 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:03:58,520 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:03:58,521 INFO  L85        PathProgramCache]: Analyzing trace with hash -1489999890, now seen corresponding path program 1 times
[2023-11-06 22:03:58,522 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:03:58,522 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098530875]
[2023-11-06 22:03:58,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:58,522 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:03:58,936 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:03:58,937 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202090049]
[2023-11-06 22:03:58,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:03:58,939 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:03:58,939 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:03:58,940 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:03:58,967 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:04:05,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:04:05,457 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21600 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:04:05,531 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:04:05,705 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:04:05,706 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:04:05,706 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:04:05,706 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098530875]
[2023-11-06 22:04:05,706 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:04:05,706 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202090049]
[2023-11-06 22:04:05,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202090049] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:04:05,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:04:05,709 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:04:05,709 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192964205]
[2023-11-06 22:04:05,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:04:05,716 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:04:05,716 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:04:05,722 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:04:05,722 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:04:05,725 INFO  L87              Difference]: Start difference. First operand 7478 states and 12458 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:05,950 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:04:05,950 INFO  L93              Difference]: Finished difference Result 14475 states and 24116 transitions.
[2023-11-06 22:04:05,951 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:04:05,953 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:04:05,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:04:05,970 INFO  L225             Difference]: With dead ends: 14475
[2023-11-06 22:04:05,970 INFO  L226             Difference]: Without dead ends: 7487
[2023-11-06 22:04:05,979 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:04:05,980 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:04:05,980 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:04:05,993 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7487 states.
[2023-11-06 22:04:06,090 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 7479.
[2023-11-06 22:04:06,101 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7479 states, 7478 states have (on average 1.6660871890879914) internal successors, (12459), 7478 states have internal predecessors, (12459), 0 states have call successors, (0), 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 22:04:06,116 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7479 states to 7479 states and 12459 transitions.
[2023-11-06 22:04:06,116 INFO  L78                 Accepts]: Start accepts. Automaton has 7479 states and 12459 transitions. Word has length 4958
[2023-11-06 22:04:06,118 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:04:06,118 INFO  L495      AbstractCegarLoop]: Abstraction has 7479 states and 12459 transitions.
[2023-11-06 22:04:06,120 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:06,120 INFO  L276                IsEmpty]: Start isEmpty. Operand 7479 states and 12459 transitions.
[2023-11-06 22:04:06,403 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:04:06,404 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:04:06,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:04:06,475 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:04:06,635 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:06,635 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:04:06,636 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:04:06,637 INFO  L85        PathProgramCache]: Analyzing trace with hash 1728212412, now seen corresponding path program 1 times
[2023-11-06 22:04:06,637 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:04:06,637 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036378545]
[2023-11-06 22:04:06,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:06,638 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:04:07,068 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:04:07,068 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551628128]
[2023-11-06 22:04:07,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:07,070 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:07,070 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:04:07,071 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:04:07,091 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:04:13,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:04:13,571 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21601 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:04:13,630 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:04:13,772 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:04:13,772 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:04:13,773 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:04:13,773 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036378545]
[2023-11-06 22:04:13,773 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:04:13,777 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551628128]
[2023-11-06 22:04:13,777 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [551628128] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:04:13,777 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:04:13,778 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:04:13,779 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358028833]
[2023-11-06 22:04:13,779 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:04:13,785 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:04:13,785 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:04:13,791 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:04:13,791 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:04:13,794 INFO  L87              Difference]: Start difference. First operand 7479 states and 12459 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:14,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:04:14,018 INFO  L93              Difference]: Finished difference Result 14477 states and 24118 transitions.
[2023-11-06 22:04:14,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:04:14,020 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:04:14,020 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:04:14,033 INFO  L225             Difference]: With dead ends: 14477
[2023-11-06 22:04:14,033 INFO  L226             Difference]: Without dead ends: 7488
[2023-11-06 22:04:14,042 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:04:14,043 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:04:14,043 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:04:14,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7488 states.
[2023-11-06 22:04:14,147 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 7480.
[2023-11-06 22:04:14,156 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7480 states, 7479 states have (on average 1.6659981280919909) internal successors, (12460), 7479 states have internal predecessors, (12460), 0 states have call successors, (0), 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 22:04:14,172 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 12460 transitions.
[2023-11-06 22:04:14,172 INFO  L78                 Accepts]: Start accepts. Automaton has 7480 states and 12460 transitions. Word has length 4958
[2023-11-06 22:04:14,174 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:04:14,174 INFO  L495      AbstractCegarLoop]: Abstraction has 7480 states and 12460 transitions.
[2023-11-06 22:04:14,176 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:14,176 INFO  L276                IsEmpty]: Start isEmpty. Operand 7480 states and 12460 transitions.
[2023-11-06 22:04:14,504 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:04:14,505 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:04:14,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:04:14,567 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 22:04:14,723 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:14,724 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:04:14,724 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:04:14,726 INFO  L85        PathProgramCache]: Analyzing trace with hash -1174873718, now seen corresponding path program 1 times
[2023-11-06 22:04:14,726 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:04:14,726 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016387783]
[2023-11-06 22:04:14,727 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:14,727 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:04:15,145 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:04:15,146 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539055390]
[2023-11-06 22:04:15,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:15,148 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:15,148 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:04:15,149 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:04:15,156 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:04:21,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:04:21,681 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21602 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:04:21,739 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:04:21,905 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:04:21,906 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:04:21,906 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:04:21,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016387783]
[2023-11-06 22:04:21,906 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:04:21,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539055390]
[2023-11-06 22:04:21,906 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539055390] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:04:21,907 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:04:21,908 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:04:21,908 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134078694]
[2023-11-06 22:04:21,909 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:04:21,915 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:04:21,915 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:04:21,921 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:04:21,921 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:04:21,924 INFO  L87              Difference]: Start difference. First operand 7480 states and 12460 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:22,139 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:04:22,139 INFO  L93              Difference]: Finished difference Result 14479 states and 24120 transitions.
[2023-11-06 22:04:22,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:04:22,141 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:04:22,144 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:04:22,151 INFO  L225             Difference]: With dead ends: 14479
[2023-11-06 22:04:22,152 INFO  L226             Difference]: Without dead ends: 7489
[2023-11-06 22:04:22,161 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:04:22,162 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:04:22,162 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:04:22,175 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7489 states.
[2023-11-06 22:04:22,264 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 7481.
[2023-11-06 22:04:22,273 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7481 states, 7480 states have (on average 1.665909090909091) internal successors, (12461), 7480 states have internal predecessors, (12461), 0 states have call successors, (0), 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 22:04:22,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 12461 transitions.
[2023-11-06 22:04:22,288 INFO  L78                 Accepts]: Start accepts. Automaton has 7481 states and 12461 transitions. Word has length 4958
[2023-11-06 22:04:22,292 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:04:22,292 INFO  L495      AbstractCegarLoop]: Abstraction has 7481 states and 12461 transitions.
[2023-11-06 22:04:22,294 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:22,294 INFO  L276                IsEmpty]: Start isEmpty. Operand 7481 states and 12461 transitions.
[2023-11-06 22:04:22,580 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:04:22,580 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:04:22,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:04:22,649 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:04:22,797 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:22,798 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:04:22,798 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:04:22,800 INFO  L85        PathProgramCache]: Analyzing trace with hash -2011005096, now seen corresponding path program 1 times
[2023-11-06 22:04:22,800 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:04:22,800 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278778172]
[2023-11-06 22:04:22,801 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:22,801 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:04:23,203 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:04:23,204 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523664806]
[2023-11-06 22:04:23,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:23,205 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:23,205 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:04:23,206 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:04:23,227 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:04:29,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:04:29,797 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21603 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:04:29,855 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:04:30,011 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:04:30,012 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:04:30,012 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:04:30,012 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278778172]
[2023-11-06 22:04:30,012 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:04:30,013 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523664806]
[2023-11-06 22:04:30,013 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523664806] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:04:30,013 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:04:30,014 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:04:30,017 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863556865]
[2023-11-06 22:04:30,017 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:04:30,022 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:04:30,023 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:04:30,028 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:04:30,028 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:04:30,030 INFO  L87              Difference]: Start difference. First operand 7481 states and 12461 transitions. Second operand  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:30,259 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:04:30,259 INFO  L93              Difference]: Finished difference Result 14481 states and 24122 transitions.
[2023-11-06 22:04:30,260 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:04:30,262 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 4958
[2023-11-06 22:04:30,266 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:04:30,273 INFO  L225             Difference]: With dead ends: 14481
[2023-11-06 22:04:30,273 INFO  L226             Difference]: Without dead ends: 7490
[2023-11-06 22:04:30,280 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4957 GetRequests, 4955 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 22:04:30,281 INFO  L413           NwaCegarLoop]: 11966 mSDtfsCounter, 12 mSDsluCounter, 23920 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35886 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:04:30,281 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35886 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:04:30,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7490 states.
[2023-11-06 22:04:30,383 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 7482.
[2023-11-06 22:04:30,392 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7482 states, 7481 states have (on average 1.665820077529742) internal successors, (12462), 7481 states have internal predecessors, (12462), 0 states have call successors, (0), 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 22:04:30,411 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 12462 transitions.
[2023-11-06 22:04:30,411 INFO  L78                 Accepts]: Start accepts. Automaton has 7482 states and 12462 transitions. Word has length 4958
[2023-11-06 22:04:30,418 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:04:30,418 INFO  L495      AbstractCegarLoop]: Abstraction has 7482 states and 12462 transitions.
[2023-11-06 22:04:30,420 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1239.5) internal successors, (4958), 4 states have internal predecessors, (4958), 0 states have call successors, (0), 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 22:04:30,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 7482 states and 12462 transitions.
[2023-11-06 22:04:30,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:04:30,652 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:04:30,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:04:30,709 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 22:04:30,855 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:04:30,856 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:04:30,856 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:04:30,858 INFO  L85        PathProgramCache]: Analyzing trace with hash -2013125082, now seen corresponding path program 1 times
[2023-11-06 22:04:30,858 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:04:30,858 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043663559]
[2023-11-06 22:04:30,859 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:30,859 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:04:31,246 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:04:31,246 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305855303]
[2023-11-06 22:04:31,248 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:31,248 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:04:31,248 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:04:31,249 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:04:31,278 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:04:37,520 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:04:37,662 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21604 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:04:37,774 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:04:38,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 4 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:04:38,665 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:04:38,927 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked.
[2023-11-06 22:04:38,927 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:04:38,927 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043663559]
[2023-11-06 22:04:38,927 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:04:38,927 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305855303]
[2023-11-06 22:04:38,928 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305855303] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:04:38,928 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:04:38,931 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-06 22:04:38,932 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179741715]
[2023-11-06 22:04:38,932 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:04:38,938 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-06 22:04:38,938 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:04:38,944 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-06 22:04:38,944 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2023-11-06 22:04:38,946 INFO  L87              Difference]: Start difference. First operand 7482 states and 12462 transitions. Second operand  has 6 states, 6 states have (on average 794.5) internal successors, (4767), 6 states have internal predecessors, (4767), 0 states have call successors, (0), 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 22:04:58,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:04:58,839 INFO  L93              Difference]: Finished difference Result 34880 states and 57924 transitions.
[2023-11-06 22:04:58,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:04:58,840 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 794.5) internal successors, (4767), 6 states have internal predecessors, (4767), 0 states have call successors, (0), 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 4958
[2023-11-06 22:04:58,846 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:04:58,865 INFO  L225             Difference]: With dead ends: 34880
[2023-11-06 22:04:58,865 INFO  L226             Difference]: Without dead ends: 21451
[2023-11-06 22:04:58,877 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9915 GetRequests, 9904 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2023-11-06 22:04:58,878 INFO  L413           NwaCegarLoop]: 19674 mSDtfsCounter, 33226 mSDsluCounter, 66819 mSDsCounter, 0 mSdLazyCounter, 21762 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33226 SdHoareTripleChecker+Valid, 86493 SdHoareTripleChecker+Invalid, 22315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 21762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time
[2023-11-06 22:04:58,878 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33226 Valid, 86493 Invalid, 22315 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [553 Valid, 21762 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time]
[2023-11-06 22:04:58,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21451 states.
[2023-11-06 22:04:59,056 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21451 to 7482.
[2023-11-06 22:04:59,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7482 states, 7481 states have (on average 1.665820077529742) internal successors, (12462), 7481 states have internal predecessors, (12462), 0 states have call successors, (0), 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 22:04:59,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 12462 transitions.
[2023-11-06 22:04:59,079 INFO  L78                 Accepts]: Start accepts. Automaton has 7482 states and 12462 transitions. Word has length 4958
[2023-11-06 22:04:59,083 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:04:59,083 INFO  L495      AbstractCegarLoop]: Abstraction has 7482 states and 12462 transitions.
[2023-11-06 22:04:59,084 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 794.5) internal successors, (4767), 6 states have internal predecessors, (4767), 0 states have call successors, (0), 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 22:04:59,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 7482 states and 12462 transitions.
[2023-11-06 22:04:59,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4960
[2023-11-06 22:04:59,348 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:04:59,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:04:59,418 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:04:59,579 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-06 22:04:59,579 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:04:59,580 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:04:59,582 INFO  L85        PathProgramCache]: Analyzing trace with hash -1070453668, now seen corresponding path program 1 times
[2023-11-06 22:04:59,582 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:04:59,582 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291480917]
[2023-11-06 22:04:59,583 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:04:59,583 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:05:00,180 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:05:00,181 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924048698]
[2023-11-06 22:05:00,182 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:05:00,182 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:05:00,183 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:05:00,184 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:05:00,211 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c6115f-74c8-4d2c-8cb0-35a90557a5cb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:05:06,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:05:06,859 INFO  L262         TraceCheckSpWp]: Trace formula consists of 21608 conjuncts, 44 conjunts are in the unsatisfiable core
[2023-11-06 22:05:06,928 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:05:35,339 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 4 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:05:35,340 INFO  L327         TraceCheckSpWp]: Computing backward predicates...