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


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.5.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3f0f6dc4c69710f9b49146a091b787943673df7efabfa4cf3572482098bcc06e
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 02:46:18,897 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 02:46:18,958 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 02:46:18,962 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 02:46:18,963 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 02:46:18,987 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 02:46:18,987 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 02:46:18,988 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 02:46:18,988 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 02:46:18,989 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 02:46:18,990 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 02:46:18,990 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 02:46:18,991 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 02:46:18,991 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 02:46:18,992 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 02:46:18,992 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 02:46:18,993 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 02:46:18,993 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 02:46:18,994 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 02:46:18,994 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 02:46:18,995 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 02:46:18,995 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 02:46:18,996 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 02:46:18,996 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 02:46:18,997 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 02:46:18,997 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 02:46:18,998 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 02:46:18,998 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 02:46:18,998 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:46:18,999 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 02:46:18,999 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 02:46:19,000 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 02:46:19,000 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 02:46:19,000 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 02:46:19,001 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 02:46:19,001 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 02:46:19,001 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 02:46:19,001 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 02:46:19,002 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 02:46:19,002 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_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/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_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f0f6dc4c69710f9b49146a091b787943673df7efabfa4cf3572482098bcc06e
[2023-11-29 02:46:19,221 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 02:46:19,241 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 02:46:19,244 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 02:46:19,253 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 02:46:19,254 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 02:46:19,255 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.5.prop1-back-serstep.c
[2023-11-29 02:46:21,926 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 02:46:22,269 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 02:46:22,270 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.5.prop1-back-serstep.c
[2023-11-29 02:46:22,297 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/data/042af3978/ede7e36d86344d8c88251742eec2607d/FLAG14490dda6
[2023-11-29 02:46:22,311 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/data/042af3978/ede7e36d86344d8c88251742eec2607d
[2023-11-29 02:46:22,313 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 02:46:22,315 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 02:46:22,316 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 02:46:22,316 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 02:46:22,321 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 02:46:22,322 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:22" (1/1) ...
[2023-11-29 02:46:22,323 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6bb085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:22, skipping insertion in model container
[2023-11-29 02:46:22,323 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:22" (1/1) ...
[2023-11-29 02:46:22,410 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 02:46:22,624 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_7ead9efb-eec8-4df5-b471-9070c859da42/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.5.prop1-back-serstep.c[1177,1190]
[2023-11-29 02:46:23,165 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:46:23,173 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 02:46:23,182 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_7ead9efb-eec8-4df5-b471-9070c859da42/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.5.prop1-back-serstep.c[1177,1190]
[2023-11-29 02:46:23,435 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:46:23,446 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 02:46:23,447 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23 WrapperNode
[2023-11-29 02:46:23,447 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 02:46:23,448 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 02:46:23,448 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 02:46:23,448 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 02:46:23,454 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:23,548 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:24,602 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 18079
[2023-11-29 02:46:24,602 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 02:46:24,603 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 02:46:24,603 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 02:46:24,603 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 02:46:24,611 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:24,612 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:24,871 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,150 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 02:46:25,150 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,150 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,462 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,528 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,620 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,674 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,978 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 02:46:25,979 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 02:46:25,979 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 02:46:25,979 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 02:46:25,980 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (1/1) ...
[2023-11-29 02:46:25,986 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:46:25,997 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:46:26,007 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 02:46:26,008 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 02:46:26,039 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 02:46:26,039 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 02:46:26,039 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 02:46:26,039 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 02:46:26,800 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 02:46:26,802 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 02:46:37,041 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 02:46:37,281 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 02:46:37,281 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 02:46:37,284 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:46:37 BoogieIcfgContainer
[2023-11-29 02:46:37,284 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 02:46:37,287 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 02:46:37,287 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 02:46:37,290 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 02:46:37,291 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:46:22" (1/3) ...
[2023-11-29 02:46:37,291 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532821e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:46:37, skipping insertion in model container
[2023-11-29 02:46:37,292 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:23" (2/3) ...
[2023-11-29 02:46:37,292 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532821e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:46:37, skipping insertion in model container
[2023-11-29 02:46:37,292 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:46:37" (3/3) ...
[2023-11-29 02:46:37,293 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.collision.5.prop1-back-serstep.c
[2023-11-29 02:46:37,315 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 02:46:37,316 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 02:46:37,463 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 02:46:37,470 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@322c0a12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 02:46:37,470 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 02:46:37,491 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 4597 states, 4595 states have (on average 1.6772578890097933) internal successors, (7707), 4596 states have internal predecessors, (7707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:37,519 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 375
[2023-11-29 02:46:37,520 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:37,521 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:46:37,521 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:37,527 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:37,528 INFO  L85        PathProgramCache]: Analyzing trace with hash -1757282758, now seen corresponding path program 1 times
[2023-11-29 02:46:37,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:37,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715600461]
[2023-11-29 02:46:37,539 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:37,540 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:38,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:39,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:39,365 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:39,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715600461]
[2023-11-29 02:46:39,366 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715600461] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:39,366 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:39,366 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:39,367 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79407466]
[2023-11-29 02:46:39,368 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:39,373 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:39,374 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:39,400 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:39,401 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:39,413 INFO  L87              Difference]: Start difference. First operand  has 4597 states, 4595 states have (on average 1.6772578890097933) internal successors, (7707), 4596 states have internal predecessors, (7707), 0 states have call successors, (0), 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 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:39,689 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:39,689 INFO  L93              Difference]: Finished difference Result 9061 states and 15195 transitions.
[2023-11-29 02:46:39,690 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:46:39,691 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 374
[2023-11-29 02:46:39,694 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:39,726 INFO  L225             Difference]: With dead ends: 9061
[2023-11-29 02:46:39,726 INFO  L226             Difference]: Without dead ends: 4597
[2023-11-29 02:46:39,736 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
[2023-11-29 02:46:39,739 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 1 mSDsluCounter, 15395 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23095 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:39,740 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23095 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:39,763 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4597 states.
[2023-11-29 02:46:39,867 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 4597.
[2023-11-29 02:46:39,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4597 states, 4596 states have (on average 1.6764577893820714) internal successors, (7705), 4596 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:39,892 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 7705 transitions.
[2023-11-29 02:46:39,893 INFO  L78                 Accepts]: Start accepts. Automaton has 4597 states and 7705 transitions. Word has length 374
[2023-11-29 02:46:39,895 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:39,895 INFO  L495      AbstractCegarLoop]: Abstraction has 4597 states and 7705 transitions.
[2023-11-29 02:46:39,896 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:39,896 INFO  L276                IsEmpty]: Start isEmpty. Operand 4597 states and 7705 transitions.
[2023-11-29 02:46:39,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 376
[2023-11-29 02:46:39,904 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:39,904 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:46:39,904 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 02:46:39,904 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:39,905 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:39,905 INFO  L85        PathProgramCache]: Analyzing trace with hash 1360536518, now seen corresponding path program 1 times
[2023-11-29 02:46:39,905 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:39,906 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879131407]
[2023-11-29 02:46:39,906 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:39,906 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:40,086 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:40,828 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:40,829 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:40,829 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879131407]
[2023-11-29 02:46:40,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879131407] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:40,829 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:40,830 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:40,830 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779424837]
[2023-11-29 02:46:40,830 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:40,832 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:40,832 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:40,833 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:40,834 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:40,834 INFO  L87              Difference]: Start difference. First operand 4597 states and 7705 transitions. Second operand  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:41,060 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:41,060 INFO  L93              Difference]: Finished difference Result 9064 states and 15193 transitions.
[2023-11-29 02:46:41,061 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:46:41,061 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 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 375
[2023-11-29 02:46:41,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:41,088 INFO  L225             Difference]: With dead ends: 9064
[2023-11-29 02:46:41,089 INFO  L226             Difference]: Without dead ends: 4600
[2023-11-29 02:46:41,094 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
[2023-11-29 02:46:41,096 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 1 mSDsluCounter, 15393 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23093 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:41,096 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23093 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:41,105 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4600 states.
[2023-11-29 02:46:41,184 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4599.
[2023-11-29 02:46:41,195 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4599 states, 4598 states have (on average 1.676163549369291) internal successors, (7707), 4598 states have internal predecessors, (7707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:41,213 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 7707 transitions.
[2023-11-29 02:46:41,213 INFO  L78                 Accepts]: Start accepts. Automaton has 4599 states and 7707 transitions. Word has length 375
[2023-11-29 02:46:41,214 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:41,214 INFO  L495      AbstractCegarLoop]: Abstraction has 4599 states and 7707 transitions.
[2023-11-29 02:46:41,214 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:41,215 INFO  L276                IsEmpty]: Start isEmpty. Operand 4599 states and 7707 transitions.
[2023-11-29 02:46:41,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 377
[2023-11-29 02:46:41,221 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:41,221 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:46:41,221 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 02:46:41,222 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:41,222 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:41,222 INFO  L85        PathProgramCache]: Analyzing trace with hash -983471148, now seen corresponding path program 1 times
[2023-11-29 02:46:41,222 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:41,223 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697226954]
[2023-11-29 02:46:41,223 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:41,223 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:41,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:42,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:42,090 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:42,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697226954]
[2023-11-29 02:46:42,091 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697226954] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:42,091 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:42,091 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:42,091 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871349617]
[2023-11-29 02:46:42,091 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:42,092 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:42,092 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:42,093 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:42,094 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:42,094 INFO  L87              Difference]: Start difference. First operand 4599 states and 7707 transitions. Second operand  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:42,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:42,439 INFO  L93              Difference]: Finished difference Result 13525 states and 22670 transitions.
[2023-11-29 02:46:42,439 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 02:46:42,440 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 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 376
[2023-11-29 02:46:42,441 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:42,487 INFO  L225             Difference]: With dead ends: 13525
[2023-11-29 02:46:42,487 INFO  L226             Difference]: Without dead ends: 9059
[2023-11-29 02:46:42,494 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 02:46:42,496 INFO  L413           NwaCegarLoop]: 8395 mSDtfsCounter, 7473 mSDsluCounter, 16086 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7473 SdHoareTripleChecker+Valid, 24481 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:42,496 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7473 Valid, 24481 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:42,509 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9059 states.
[2023-11-29 02:46:42,616 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9059 to 4601.
[2023-11-29 02:46:42,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4601 states, 4600 states have (on average 1.6758695652173914) internal successors, (7709), 4600 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:42,647 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 7709 transitions.
[2023-11-29 02:46:42,647 INFO  L78                 Accepts]: Start accepts. Automaton has 4601 states and 7709 transitions. Word has length 376
[2023-11-29 02:46:42,648 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:42,648 INFO  L495      AbstractCegarLoop]: Abstraction has 4601 states and 7709 transitions.
[2023-11-29 02:46:42,649 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:42,649 INFO  L276                IsEmpty]: Start isEmpty. Operand 4601 states and 7709 transitions.
[2023-11-29 02:46:42,655 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 378
[2023-11-29 02:46:42,656 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:42,656 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:46:42,656 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 02:46:42,657 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:42,657 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:42,657 INFO  L85        PathProgramCache]: Analyzing trace with hash 1177074476, now seen corresponding path program 1 times
[2023-11-29 02:46:42,658 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:42,658 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542835574]
[2023-11-29 02:46:42,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:42,658 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:42,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:43,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:43,661 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:43,661 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542835574]
[2023-11-29 02:46:43,662 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542835574] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:43,662 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:43,662 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-29 02:46:43,662 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663990544]
[2023-11-29 02:46:43,662 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:43,663 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:46:43,663 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:43,664 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:46:43,664 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:46:43,665 INFO  L87              Difference]: Start difference. First operand 4601 states and 7709 transitions. Second operand  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:44,076 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:44,076 INFO  L93              Difference]: Finished difference Result 13948 states and 23371 transitions.
[2023-11-29 02:46:44,077 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:46:44,077 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 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 377
[2023-11-29 02:46:44,078 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:44,119 INFO  L225             Difference]: With dead ends: 13948
[2023-11-29 02:46:44,119 INFO  L226             Difference]: Without dead ends: 9480
[2023-11-29 02:46:44,126 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2023-11-29 02:46:44,127 INFO  L413           NwaCegarLoop]: 8394 mSDtfsCounter, 30452 mSDsluCounter, 23784 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30452 SdHoareTripleChecker+Valid, 32178 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:44,128 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [30452 Valid, 32178 Invalid, 26 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:46:44,139 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9480 states.
[2023-11-29 02:46:44,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 5018.
[2023-11-29 02:46:44,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5018 states, 5017 states have (on average 1.675104644209687) internal successors, (8404), 5017 states have internal predecessors, (8404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:44,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8404 transitions.
[2023-11-29 02:46:44,241 INFO  L78                 Accepts]: Start accepts. Automaton has 5018 states and 8404 transitions. Word has length 377
[2023-11-29 02:46:44,242 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:44,242 INFO  L495      AbstractCegarLoop]: Abstraction has 5018 states and 8404 transitions.
[2023-11-29 02:46:44,243 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:44,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 5018 states and 8404 transitions.
[2023-11-29 02:46:44,472 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:46:44,472 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:44,474 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:46:44,474 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 02:46:44,474 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:44,475 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:44,476 INFO  L85        PathProgramCache]: Analyzing trace with hash -1980118489, now seen corresponding path program 1 times
[2023-11-29 02:46:44,476 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:44,476 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339845976]
[2023-11-29 02:46:44,476 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:44,477 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:44,749 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:46:44,749 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912733723]
[2023-11-29 02:46:44,750 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:44,750 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:44,750 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:46:44,753 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:46:44,757 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 02:46:48,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:48,182 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12602 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:46:48,276 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:46:48,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:48,542 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:46:48,542 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:48,542 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339845976]
[2023-11-29 02:46:48,542 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:46:48,542 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912733723]
[2023-11-29 02:46:48,542 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912733723] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:48,543 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:48,544 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:48,544 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112315297]
[2023-11-29 02:46:48,544 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:48,548 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:48,549 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:48,553 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:48,553 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:48,555 INFO  L87              Difference]: Start difference. First operand 5018 states and 8404 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:48,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:48,734 INFO  L93              Difference]: Finished difference Result 9496 states and 15908 transitions.
[2023-11-29 02:46:48,734 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:46:48,736 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:46:48,737 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:48,747 INFO  L225             Difference]: With dead ends: 9496
[2023-11-29 02:46:48,748 INFO  L226             Difference]: Without dead ends: 5028
[2023-11-29 02:46:48,753 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:48,754 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:48,754 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:48,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5028 states.
[2023-11-29 02:46:48,854 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 5020.
[2023-11-29 02:46:48,862 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5020 states, 5019 states have (on average 1.6748356246264196) internal successors, (8406), 5019 states have internal predecessors, (8406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:48,871 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 8406 transitions.
[2023-11-29 02:46:48,871 INFO  L78                 Accepts]: Start accepts. Automaton has 5020 states and 8406 transitions. Word has length 3108
[2023-11-29 02:46:48,873 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:48,873 INFO  L495      AbstractCegarLoop]: Abstraction has 5020 states and 8406 transitions.
[2023-11-29 02:46:48,875 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:48,875 INFO  L276                IsEmpty]: Start isEmpty. Operand 5020 states and 8406 transitions.
[2023-11-29 02:46:48,948 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:46:48,949 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:48,951 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:46:48,990 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 02:46:49,152 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:49,152 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:49,153 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:49,154 INFO  L85        PathProgramCache]: Analyzing trace with hash -7121419, now seen corresponding path program 1 times
[2023-11-29 02:46:49,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:49,154 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44436396]
[2023-11-29 02:46:49,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:49,155 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:49,536 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:46:49,536 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514802626]
[2023-11-29 02:46:49,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:49,537 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:49,538 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:46:49,538 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:46:49,540 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 02:46:52,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:52,426 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12603 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:46:52,494 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:46:52,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:52,609 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:46:52,609 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:52,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44436396]
[2023-11-29 02:46:52,610 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:46:52,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514802626]
[2023-11-29 02:46:52,610 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514802626] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:52,610 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:52,611 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:52,611 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434558669]
[2023-11-29 02:46:52,612 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:52,616 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:52,616 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:52,620 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:52,620 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:52,621 INFO  L87              Difference]: Start difference. First operand 5020 states and 8406 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:52,784 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:52,784 INFO  L93              Difference]: Finished difference Result 9499 states and 15910 transitions.
[2023-11-29 02:46:52,784 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:46:52,785 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:46:52,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:52,794 INFO  L225             Difference]: With dead ends: 9499
[2023-11-29 02:46:52,795 INFO  L226             Difference]: Without dead ends: 5029
[2023-11-29 02:46:52,800 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:52,801 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:52,801 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:52,811 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5029 states.
[2023-11-29 02:46:52,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 5021.
[2023-11-29 02:46:52,905 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5021 states, 5020 states have (on average 1.6747011952191235) internal successors, (8407), 5020 states have internal predecessors, (8407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:52,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 8407 transitions.
[2023-11-29 02:46:52,917 INFO  L78                 Accepts]: Start accepts. Automaton has 5021 states and 8407 transitions. Word has length 3108
[2023-11-29 02:46:52,919 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:52,919 INFO  L495      AbstractCegarLoop]: Abstraction has 5021 states and 8407 transitions.
[2023-11-29 02:46:52,921 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:52,921 INFO  L276                IsEmpty]: Start isEmpty. Operand 5021 states and 8407 transitions.
[2023-11-29 02:46:53,121 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:46:53,121 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:53,123 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:46:53,154 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 02:46:53,324 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:53,324 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:53,325 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:53,327 INFO  L85        PathProgramCache]: Analyzing trace with hash -725241661, now seen corresponding path program 1 times
[2023-11-29 02:46:53,327 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:53,327 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611245616]
[2023-11-29 02:46:53,328 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:53,328 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:53,779 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:46:53,779 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895335369]
[2023-11-29 02:46:53,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:53,781 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:53,781 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:46:53,782 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:46:53,785 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 02:46:56,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:46:56,888 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12604 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:46:56,961 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:46:57,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:46:57,119 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:46:57,120 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:46:57,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611245616]
[2023-11-29 02:46:57,120 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:46:57,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895335369]
[2023-11-29 02:46:57,120 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [895335369] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:46:57,120 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:46:57,121 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:46:57,122 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671392114]
[2023-11-29 02:46:57,122 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:46:57,127 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:46:57,127 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:46:57,132 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:46:57,132 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:57,133 INFO  L87              Difference]: Start difference. First operand 5021 states and 8407 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:57,281 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:46:57,281 INFO  L93              Difference]: Finished difference Result 9501 states and 15912 transitions.
[2023-11-29 02:46:57,282 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:46:57,283 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:46:57,284 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:46:57,292 INFO  L225             Difference]: With dead ends: 9501
[2023-11-29 02:46:57,292 INFO  L226             Difference]: Without dead ends: 5030
[2023-11-29 02:46:57,297 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:46:57,297 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:46:57,298 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:46:57,304 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5030 states.
[2023-11-29 02:46:57,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 5022.
[2023-11-29 02:46:57,375 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5022 states, 5021 states have (on average 1.6745668193586936) internal successors, (8408), 5021 states have internal predecessors, (8408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:57,383 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5022 states to 5022 states and 8408 transitions.
[2023-11-29 02:46:57,383 INFO  L78                 Accepts]: Start accepts. Automaton has 5022 states and 8408 transitions. Word has length 3108
[2023-11-29 02:46:57,385 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:46:57,385 INFO  L495      AbstractCegarLoop]: Abstraction has 5022 states and 8408 transitions.
[2023-11-29 02:46:57,386 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:46:57,386 INFO  L276                IsEmpty]: Start isEmpty. Operand 5022 states and 8408 transitions.
[2023-11-29 02:46:57,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:46:57,481 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:46:57,482 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:46:57,514 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 02:46:57,683 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:57,683 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:46:57,683 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:46:57,685 INFO  L85        PathProgramCache]: Analyzing trace with hash 365309621, now seen corresponding path program 1 times
[2023-11-29 02:46:57,685 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:46:57,685 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134433055]
[2023-11-29 02:46:57,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:57,685 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:46:57,919 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:46:57,919 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125324425]
[2023-11-29 02:46:57,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:46:57,920 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:46:57,920 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:46:57,921 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:46:57,922 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 02:47:00,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:00,509 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12605 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:00,545 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:00,613 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:00,613 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:00,613 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:00,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134433055]
[2023-11-29 02:47:00,613 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:00,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125324425]
[2023-11-29 02:47:00,613 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125324425] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:00,614 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:00,615 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:00,615 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564853532]
[2023-11-29 02:47:00,615 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:00,619 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:00,619 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:00,621 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:00,622 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:00,623 INFO  L87              Difference]: Start difference. First operand 5022 states and 8408 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:00,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:00,742 INFO  L93              Difference]: Finished difference Result 9503 states and 15914 transitions.
[2023-11-29 02:47:00,742 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:00,743 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:00,745 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:00,749 INFO  L225             Difference]: With dead ends: 9503
[2023-11-29 02:47:00,749 INFO  L226             Difference]: Without dead ends: 5031
[2023-11-29 02:47:00,754 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:00,755 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:00,755 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:00,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5031 states.
[2023-11-29 02:47:00,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5031 to 5023.
[2023-11-29 02:47:00,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5023 states, 5022 states have (on average 1.6744324970131421) internal successors, (8409), 5022 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:00,816 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 8409 transitions.
[2023-11-29 02:47:00,816 INFO  L78                 Accepts]: Start accepts. Automaton has 5023 states and 8409 transitions. Word has length 3108
[2023-11-29 02:47:00,818 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:00,818 INFO  L495      AbstractCegarLoop]: Abstraction has 5023 states and 8409 transitions.
[2023-11-29 02:47:00,819 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:00,819 INFO  L276                IsEmpty]: Start isEmpty. Operand 5023 states and 8409 transitions.
[2023-11-29 02:47:00,865 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:00,865 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:00,867 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:00,898 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 02:47:01,067 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:01,068 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:01,068 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:01,069 INFO  L85        PathProgramCache]: Analyzing trace with hash -474323965, now seen corresponding path program 1 times
[2023-11-29 02:47:01,069 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:01,069 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340273768]
[2023-11-29 02:47:01,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:01,070 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:01,279 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:01,279 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699584344]
[2023-11-29 02:47:01,280 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:01,280 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:01,280 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:01,281 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:01,282 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 02:47:03,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:04,015 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12606 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:04,062 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:04,162 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:04,162 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:04,162 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:04,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340273768]
[2023-11-29 02:47:04,162 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:04,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699584344]
[2023-11-29 02:47:04,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699584344] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:04,163 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:04,164 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:04,164 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364098127]
[2023-11-29 02:47:04,164 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:04,167 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:04,167 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:04,171 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:04,171 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:04,173 INFO  L87              Difference]: Start difference. First operand 5023 states and 8409 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:04,322 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:04,322 INFO  L93              Difference]: Finished difference Result 9505 states and 15916 transitions.
[2023-11-29 02:47:04,323 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:04,324 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:04,326 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:04,331 INFO  L225             Difference]: With dead ends: 9505
[2023-11-29 02:47:04,331 INFO  L226             Difference]: Without dead ends: 5032
[2023-11-29 02:47:04,335 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:04,336 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:04,337 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:04,343 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5032 states.
[2023-11-29 02:47:04,450 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 5024.
[2023-11-29 02:47:04,471 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5024 states, 5023 states have (on average 1.6742982281505077) internal successors, (8410), 5023 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:04,477 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 8410 transitions.
[2023-11-29 02:47:04,477 INFO  L78                 Accepts]: Start accepts. Automaton has 5024 states and 8410 transitions. Word has length 3108
[2023-11-29 02:47:04,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:04,478 INFO  L495      AbstractCegarLoop]: Abstraction has 5024 states and 8410 transitions.
[2023-11-29 02:47:04,479 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:04,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 5024 states and 8410 transitions.
[2023-11-29 02:47:04,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:04,552 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:04,554 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:04,591 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:04,768 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:04,769 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:04,769 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:04,771 INFO  L85        PathProgramCache]: Analyzing trace with hash 11624821, now seen corresponding path program 1 times
[2023-11-29 02:47:04,771 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:04,771 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663001678]
[2023-11-29 02:47:04,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:04,772 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:05,021 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:05,021 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537672538]
[2023-11-29 02:47:05,022 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:05,022 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:05,023 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:05,023 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:05,029 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 02:47:07,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:07,682 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12607 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:07,730 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:07,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:07,806 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:07,806 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:07,806 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663001678]
[2023-11-29 02:47:07,806 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:07,806 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537672538]
[2023-11-29 02:47:07,806 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537672538] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:07,806 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:07,807 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:07,807 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433030825]
[2023-11-29 02:47:07,807 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:07,811 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:07,811 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:07,815 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:07,815 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:07,816 INFO  L87              Difference]: Start difference. First operand 5024 states and 8410 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:07,939 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:07,940 INFO  L93              Difference]: Finished difference Result 9507 states and 15918 transitions.
[2023-11-29 02:47:07,940 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:07,941 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:07,942 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:07,946 INFO  L225             Difference]: With dead ends: 9507
[2023-11-29 02:47:07,946 INFO  L226             Difference]: Without dead ends: 5033
[2023-11-29 02:47:07,950 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:07,951 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:07,951 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:07,958 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5033 states.
[2023-11-29 02:47:08,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 5025.
[2023-11-29 02:47:08,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5025 states, 5024 states have (on average 1.6741640127388535) internal successors, (8411), 5024 states have internal predecessors, (8411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:08,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 8411 transitions.
[2023-11-29 02:47:08,034 INFO  L78                 Accepts]: Start accepts. Automaton has 5025 states and 8411 transitions. Word has length 3108
[2023-11-29 02:47:08,036 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:08,036 INFO  L495      AbstractCegarLoop]: Abstraction has 5025 states and 8411 transitions.
[2023-11-29 02:47:08,038 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:08,038 INFO  L276                IsEmpty]: Start isEmpty. Operand 5025 states and 8411 transitions.
[2023-11-29 02:47:08,108 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:08,108 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:08,110 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:08,147 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 02:47:08,324 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 02:47:08,325 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:08,325 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:08,326 INFO  L85        PathProgramCache]: Analyzing trace with hash -2075733693, now seen corresponding path program 1 times
[2023-11-29 02:47:08,326 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:08,326 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979443186]
[2023-11-29 02:47:08,327 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:08,327 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:08,539 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:08,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303716075]
[2023-11-29 02:47:08,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:08,540 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:08,540 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:08,541 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:08,542 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 02:47:10,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:11,062 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12608 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:11,096 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:11,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:11,155 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:11,155 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:11,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979443186]
[2023-11-29 02:47:11,155 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:11,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303716075]
[2023-11-29 02:47:11,155 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303716075] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:11,155 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:11,156 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:11,156 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701837747]
[2023-11-29 02:47:11,156 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:11,160 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:11,160 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:11,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:11,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:11,163 INFO  L87              Difference]: Start difference. First operand 5025 states and 8411 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:11,268 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:11,268 INFO  L93              Difference]: Finished difference Result 9509 states and 15920 transitions.
[2023-11-29 02:47:11,268 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:11,269 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:11,270 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:11,276 INFO  L225             Difference]: With dead ends: 9509
[2023-11-29 02:47:11,276 INFO  L226             Difference]: Without dead ends: 5034
[2023-11-29 02:47:11,281 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:11,281 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:11,282 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:11,288 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5034 states.
[2023-11-29 02:47:11,339 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 5026.
[2023-11-29 02:47:11,346 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5026 states, 5025 states have (on average 1.6740298507462688) internal successors, (8412), 5025 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:11,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5026 states to 5026 states and 8412 transitions.
[2023-11-29 02:47:11,354 INFO  L78                 Accepts]: Start accepts. Automaton has 5026 states and 8412 transitions. Word has length 3108
[2023-11-29 02:47:11,356 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:11,356 INFO  L495      AbstractCegarLoop]: Abstraction has 5026 states and 8412 transitions.
[2023-11-29 02:47:11,357 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:11,357 INFO  L276                IsEmpty]: Start isEmpty. Operand 5026 states and 8412 transitions.
[2023-11-29 02:47:11,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:11,428 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:11,431 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:11,467 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 02:47:11,631 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:11,632 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:11,632 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:11,633 INFO  L85        PathProgramCache]: Analyzing trace with hash 1733979153, now seen corresponding path program 1 times
[2023-11-29 02:47:11,633 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:11,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030795348]
[2023-11-29 02:47:11,634 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:11,634 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:11,854 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:11,854 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543246360]
[2023-11-29 02:47:11,855 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:11,855 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:11,855 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:11,856 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:11,857 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 02:47:14,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:14,492 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12609 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:14,526 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:14,583 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:14,583 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:14,583 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:14,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030795348]
[2023-11-29 02:47:14,583 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:14,584 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543246360]
[2023-11-29 02:47:14,584 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543246360] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:14,584 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:14,584 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:14,584 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633069396]
[2023-11-29 02:47:14,585 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:14,587 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:14,587 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:14,590 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:14,590 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:14,590 INFO  L87              Difference]: Start difference. First operand 5026 states and 8412 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:14,725 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:14,725 INFO  L93              Difference]: Finished difference Result 9511 states and 15922 transitions.
[2023-11-29 02:47:14,726 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:14,726 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:14,727 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:14,731 INFO  L225             Difference]: With dead ends: 9511
[2023-11-29 02:47:14,731 INFO  L226             Difference]: Without dead ends: 5035
[2023-11-29 02:47:14,734 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:14,735 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:14,735 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:47:14,739 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5035 states.
[2023-11-29 02:47:14,781 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5035 to 5027.
[2023-11-29 02:47:14,785 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5027 states, 5026 states have (on average 1.6738957421408676) internal successors, (8413), 5026 states have internal predecessors, (8413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:14,793 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 8413 transitions.
[2023-11-29 02:47:14,793 INFO  L78                 Accepts]: Start accepts. Automaton has 5027 states and 8413 transitions. Word has length 3108
[2023-11-29 02:47:14,794 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:14,794 INFO  L495      AbstractCegarLoop]: Abstraction has 5027 states and 8413 transitions.
[2023-11-29 02:47:14,795 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:14,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 5027 states and 8413 transitions.
[2023-11-29 02:47:14,841 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:14,841 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:14,843 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:14,873 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:15,043 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:15,044 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:15,044 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:15,045 INFO  L85        PathProgramCache]: Analyzing trace with hash 774524675, now seen corresponding path program 1 times
[2023-11-29 02:47:15,045 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:15,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241446549]
[2023-11-29 02:47:15,046 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:15,046 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:15,267 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:15,267 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130146807]
[2023-11-29 02:47:15,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:15,268 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:15,268 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:15,269 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:15,270 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 02:47:17,779 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:17,850 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12610 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:17,882 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:17,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:17,936 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:17,936 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:17,936 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241446549]
[2023-11-29 02:47:17,936 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:17,936 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130146807]
[2023-11-29 02:47:17,936 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130146807] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:17,936 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:17,937 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:17,937 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521176671]
[2023-11-29 02:47:17,937 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:17,939 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:17,940 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:17,942 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:17,942 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:17,943 INFO  L87              Difference]: Start difference. First operand 5027 states and 8413 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:18,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:18,053 INFO  L93              Difference]: Finished difference Result 9513 states and 15924 transitions.
[2023-11-29 02:47:18,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:18,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:18,056 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:18,059 INFO  L225             Difference]: With dead ends: 9513
[2023-11-29 02:47:18,059 INFO  L226             Difference]: Without dead ends: 5036
[2023-11-29 02:47:18,063 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:18,063 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:18,063 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:18,068 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5036 states.
[2023-11-29 02:47:18,110 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 5028.
[2023-11-29 02:47:18,114 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5028 states, 5027 states have (on average 1.6737616868907896) internal successors, (8414), 5027 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:18,120 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 8414 transitions.
[2023-11-29 02:47:18,120 INFO  L78                 Accepts]: Start accepts. Automaton has 5028 states and 8414 transitions. Word has length 3108
[2023-11-29 02:47:18,121 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:18,122 INFO  L495      AbstractCegarLoop]: Abstraction has 5028 states and 8414 transitions.
[2023-11-29 02:47:18,122 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:18,122 INFO  L276                IsEmpty]: Start isEmpty. Operand 5028 states and 8414 transitions.
[2023-11-29 02:47:18,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:18,167 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:18,169 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:18,197 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 02:47:18,369 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 02:47:18,370 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:18,370 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:18,372 INFO  L85        PathProgramCache]: Analyzing trace with hash 847954421, now seen corresponding path program 1 times
[2023-11-29 02:47:18,372 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:18,372 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964641177]
[2023-11-29 02:47:18,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:18,373 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:18,605 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:18,605 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104432328]
[2023-11-29 02:47:18,605 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:18,606 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:18,606 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:18,606 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:18,609 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 02:47:21,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:21,163 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12611 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:21,194 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:21,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:21,248 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:21,249 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:21,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964641177]
[2023-11-29 02:47:21,249 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:21,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104432328]
[2023-11-29 02:47:21,249 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104432328] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:21,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:21,250 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:21,250 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438613901]
[2023-11-29 02:47:21,250 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:21,252 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:21,252 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:21,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:21,255 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:21,256 INFO  L87              Difference]: Start difference. First operand 5028 states and 8414 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:21,362 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:21,363 INFO  L93              Difference]: Finished difference Result 9515 states and 15926 transitions.
[2023-11-29 02:47:21,363 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:21,364 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:21,365 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:21,368 INFO  L225             Difference]: With dead ends: 9515
[2023-11-29 02:47:21,369 INFO  L226             Difference]: Without dead ends: 5037
[2023-11-29 02:47:21,372 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:21,373 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:21,373 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:21,378 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5037 states.
[2023-11-29 02:47:21,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 5029.
[2023-11-29 02:47:21,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5029 states, 5028 states have (on average 1.6736276849642004) internal successors, (8415), 5028 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:21,436 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 8415 transitions.
[2023-11-29 02:47:21,436 INFO  L78                 Accepts]: Start accepts. Automaton has 5029 states and 8415 transitions. Word has length 3108
[2023-11-29 02:47:21,437 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:21,438 INFO  L495      AbstractCegarLoop]: Abstraction has 5029 states and 8415 transitions.
[2023-11-29 02:47:21,438 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:21,438 INFO  L276                IsEmpty]: Start isEmpty. Operand 5029 states and 8415 transitions.
[2023-11-29 02:47:21,483 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:21,484 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:21,485 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:21,516 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:21,686 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 02:47:21,686 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:21,686 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:21,687 INFO  L85        PathProgramCache]: Analyzing trace with hash 1304304707, now seen corresponding path program 1 times
[2023-11-29 02:47:21,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:21,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231638255]
[2023-11-29 02:47:21,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:21,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:21,894 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:21,895 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815493356]
[2023-11-29 02:47:21,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:21,895 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:21,895 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:21,896 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:21,897 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 02:47:24,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:24,578 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12612 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:24,609 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:24,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:24,725 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:24,725 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:24,725 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231638255]
[2023-11-29 02:47:24,725 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:24,725 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815493356]
[2023-11-29 02:47:24,725 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815493356] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:24,725 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:24,726 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:24,726 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544441164]
[2023-11-29 02:47:24,726 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:24,729 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:24,729 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:24,733 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:24,733 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:24,733 INFO  L87              Difference]: Start difference. First operand 5029 states and 8415 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:24,836 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:24,836 INFO  L93              Difference]: Finished difference Result 9517 states and 15928 transitions.
[2023-11-29 02:47:24,837 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:24,837 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:24,839 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:24,842 INFO  L225             Difference]: With dead ends: 9517
[2023-11-29 02:47:24,842 INFO  L226             Difference]: Without dead ends: 5038
[2023-11-29 02:47:24,845 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:24,845 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:24,846 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:24,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5038 states.
[2023-11-29 02:47:24,884 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 5030.
[2023-11-29 02:47:24,888 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5030 states, 5029 states have (on average 1.67349373632929) internal successors, (8416), 5029 states have internal predecessors, (8416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:24,896 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 8416 transitions.
[2023-11-29 02:47:24,897 INFO  L78                 Accepts]: Start accepts. Automaton has 5030 states and 8416 transitions. Word has length 3108
[2023-11-29 02:47:24,898 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:24,899 INFO  L495      AbstractCegarLoop]: Abstraction has 5030 states and 8416 transitions.
[2023-11-29 02:47:24,900 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:24,900 INFO  L276                IsEmpty]: Start isEmpty. Operand 5030 states and 8416 transitions.
[2023-11-29 02:47:24,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:24,950 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:24,952 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:24,982 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:25,153 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 02:47:25,153 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:25,153 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:25,154 INFO  L85        PathProgramCache]: Analyzing trace with hash -572785775, now seen corresponding path program 1 times
[2023-11-29 02:47:25,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:25,155 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054459795]
[2023-11-29 02:47:25,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:25,155 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:25,354 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:25,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982942094]
[2023-11-29 02:47:25,355 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:25,355 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:25,355 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:25,356 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:25,356 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 02:47:27,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:27,877 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12613 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:27,910 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:27,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:27,978 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:27,978 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:27,978 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054459795]
[2023-11-29 02:47:27,978 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:27,978 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982942094]
[2023-11-29 02:47:27,978 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [982942094] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:27,978 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:27,979 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:27,979 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950343939]
[2023-11-29 02:47:27,979 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:27,981 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:27,982 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:27,984 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:27,984 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:27,984 INFO  L87              Difference]: Start difference. First operand 5030 states and 8416 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:28,095 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:28,095 INFO  L93              Difference]: Finished difference Result 9519 states and 15930 transitions.
[2023-11-29 02:47:28,095 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:28,096 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:28,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:28,101 INFO  L225             Difference]: With dead ends: 9519
[2023-11-29 02:47:28,101 INFO  L226             Difference]: Without dead ends: 5039
[2023-11-29 02:47:28,104 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:28,104 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:28,105 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:28,109 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5039 states.
[2023-11-29 02:47:28,137 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 5031.
[2023-11-29 02:47:28,141 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5031 states, 5030 states have (on average 1.6733598409542743) internal successors, (8417), 5030 states have internal predecessors, (8417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:28,146 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 8417 transitions.
[2023-11-29 02:47:28,146 INFO  L78                 Accepts]: Start accepts. Automaton has 5031 states and 8417 transitions. Word has length 3108
[2023-11-29 02:47:28,147 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:28,147 INFO  L495      AbstractCegarLoop]: Abstraction has 5031 states and 8417 transitions.
[2023-11-29 02:47:28,148 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:28,148 INFO  L276                IsEmpty]: Start isEmpty. Operand 5031 states and 8417 transitions.
[2023-11-29 02:47:28,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:28,190 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:28,191 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:28,219 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 02:47:28,392 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 02:47:28,392 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:28,392 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:28,393 INFO  L85        PathProgramCache]: Analyzing trace with hash 1863647071, now seen corresponding path program 1 times
[2023-11-29 02:47:28,393 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:28,393 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033995130]
[2023-11-29 02:47:28,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:28,394 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:28,596 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:28,596 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072669780]
[2023-11-29 02:47:28,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:28,597 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:28,597 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:28,598 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:28,599 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 02:47:31,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:31,246 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12614 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:31,276 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:31,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:31,333 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:31,333 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:31,333 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033995130]
[2023-11-29 02:47:31,333 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:31,334 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072669780]
[2023-11-29 02:47:31,334 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072669780] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:31,334 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:31,334 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:31,334 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988523548]
[2023-11-29 02:47:31,335 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:31,337 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:31,337 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:31,340 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:31,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:31,340 INFO  L87              Difference]: Start difference. First operand 5031 states and 8417 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:31,445 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:31,445 INFO  L93              Difference]: Finished difference Result 9521 states and 15932 transitions.
[2023-11-29 02:47:31,445 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:31,446 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:31,447 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:31,451 INFO  L225             Difference]: With dead ends: 9521
[2023-11-29 02:47:31,451 INFO  L226             Difference]: Without dead ends: 5040
[2023-11-29 02:47:31,453 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:31,454 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:31,454 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:31,458 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5040 states.
[2023-11-29 02:47:31,493 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5032.
[2023-11-29 02:47:31,498 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5032 states, 5031 states have (on average 1.673225998807394) internal successors, (8418), 5031 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:31,505 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 8418 transitions.
[2023-11-29 02:47:31,505 INFO  L78                 Accepts]: Start accepts. Automaton has 5032 states and 8418 transitions. Word has length 3108
[2023-11-29 02:47:31,507 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:31,508 INFO  L495      AbstractCegarLoop]: Abstraction has 5032 states and 8418 transitions.
[2023-11-29 02:47:31,508 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:31,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 5032 states and 8418 transitions.
[2023-11-29 02:47:31,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:31,559 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:31,561 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:31,589 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:31,762 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 02:47:31,762 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:31,763 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:31,764 INFO  L85        PathProgramCache]: Analyzing trace with hash 1629891373, now seen corresponding path program 1 times
[2023-11-29 02:47:31,764 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:31,764 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298204939]
[2023-11-29 02:47:31,764 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:31,764 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:31,962 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:31,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023881249]
[2023-11-29 02:47:31,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:31,963 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:31,963 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:31,964 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:31,966 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 02:47:34,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:34,743 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12615 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:34,777 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:34,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:34,838 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:34,839 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:34,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298204939]
[2023-11-29 02:47:34,839 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:34,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023881249]
[2023-11-29 02:47:34,839 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023881249] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:34,839 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:34,840 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:34,840 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736169784]
[2023-11-29 02:47:34,840 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:34,842 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:34,842 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:34,844 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:34,844 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:34,844 INFO  L87              Difference]: Start difference. First operand 5032 states and 8418 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:34,953 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:34,953 INFO  L93              Difference]: Finished difference Result 9523 states and 15934 transitions.
[2023-11-29 02:47:34,954 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:34,955 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:34,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:34,959 INFO  L225             Difference]: With dead ends: 9523
[2023-11-29 02:47:34,959 INFO  L226             Difference]: Without dead ends: 5041
[2023-11-29 02:47:34,962 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:34,962 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:34,963 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:34,967 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5041 states.
[2023-11-29 02:47:34,998 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 5033.
[2023-11-29 02:47:35,002 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5033 states, 5032 states have (on average 1.6730922098569156) internal successors, (8419), 5032 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:35,007 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 8419 transitions.
[2023-11-29 02:47:35,007 INFO  L78                 Accepts]: Start accepts. Automaton has 5033 states and 8419 transitions. Word has length 3108
[2023-11-29 02:47:35,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:35,008 INFO  L495      AbstractCegarLoop]: Abstraction has 5033 states and 8419 transitions.
[2023-11-29 02:47:35,009 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:35,009 INFO  L276                IsEmpty]: Start isEmpty. Operand 5033 states and 8419 transitions.
[2023-11-29 02:47:35,051 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:35,051 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:35,053 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:35,083 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 02:47:35,253 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 02:47:35,253 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:35,254 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:35,255 INFO  L85        PathProgramCache]: Analyzing trace with hash -1180132065, now seen corresponding path program 1 times
[2023-11-29 02:47:35,255 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:35,255 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142838313]
[2023-11-29 02:47:35,255 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:35,255 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:35,460 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:35,460 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760743202]
[2023-11-29 02:47:35,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:35,461 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:35,461 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:35,461 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:35,463 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 02:47:38,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:38,355 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12616 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:38,389 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:38,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:38,447 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:38,447 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:38,447 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142838313]
[2023-11-29 02:47:38,447 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:38,447 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760743202]
[2023-11-29 02:47:38,447 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760743202] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:38,448 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:38,448 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:38,449 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340821909]
[2023-11-29 02:47:38,449 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:38,451 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:38,451 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:38,453 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:38,453 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:38,454 INFO  L87              Difference]: Start difference. First operand 5033 states and 8419 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:38,559 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:38,559 INFO  L93              Difference]: Finished difference Result 9525 states and 15936 transitions.
[2023-11-29 02:47:38,559 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:38,560 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:38,561 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:38,564 INFO  L225             Difference]: With dead ends: 9525
[2023-11-29 02:47:38,564 INFO  L226             Difference]: Without dead ends: 5042
[2023-11-29 02:47:38,566 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:38,567 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:38,567 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:38,570 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5042 states.
[2023-11-29 02:47:38,598 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 5034.
[2023-11-29 02:47:38,601 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5034 states, 5033 states have (on average 1.6729584740711305) internal successors, (8420), 5033 states have internal predecessors, (8420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:38,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 8420 transitions.
[2023-11-29 02:47:38,606 INFO  L78                 Accepts]: Start accepts. Automaton has 5034 states and 8420 transitions. Word has length 3108
[2023-11-29 02:47:38,607 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:38,607 INFO  L495      AbstractCegarLoop]: Abstraction has 5034 states and 8420 transitions.
[2023-11-29 02:47:38,608 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:38,608 INFO  L276                IsEmpty]: Start isEmpty. Operand 5034 states and 8420 transitions.
[2023-11-29 02:47:38,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:38,650 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:38,651 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:38,680 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 02:47:38,851 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:38,852 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:38,852 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:38,853 INFO  L85        PathProgramCache]: Analyzing trace with hash 1677041773, now seen corresponding path program 1 times
[2023-11-29 02:47:38,853 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:38,853 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526862164]
[2023-11-29 02:47:38,854 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:38,854 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:39,051 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:39,051 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531836938]
[2023-11-29 02:47:39,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:39,052 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:39,052 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:39,052 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:39,053 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 02:47:41,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:41,594 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12617 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:47:41,627 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:41,687 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:47:41,687 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:41,687 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:41,687 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526862164]
[2023-11-29 02:47:41,687 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:41,687 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531836938]
[2023-11-29 02:47:41,687 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531836938] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:41,687 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:41,688 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:47:41,688 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484597114]
[2023-11-29 02:47:41,688 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:41,691 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:47:41,691 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:41,693 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:47:41,693 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:41,693 INFO  L87              Difference]: Start difference. First operand 5034 states and 8420 transitions. Second operand  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:41,802 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:41,802 INFO  L93              Difference]: Finished difference Result 9527 states and 15938 transitions.
[2023-11-29 02:47:41,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:47:41,803 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:41,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:41,808 INFO  L225             Difference]: With dead ends: 9527
[2023-11-29 02:47:41,808 INFO  L226             Difference]: Without dead ends: 5043
[2023-11-29 02:47:41,810 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:47:41,811 INFO  L413           NwaCegarLoop]: 7700 mSDtfsCounter, 12 mSDsluCounter, 15390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23090 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:41,811 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23090 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:47:41,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5043 states.
[2023-11-29 02:47:41,845 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 5035.
[2023-11-29 02:47:41,849 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5035 states, 5034 states have (on average 1.6728247914183552) internal successors, (8421), 5034 states have internal predecessors, (8421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:41,854 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8421 transitions.
[2023-11-29 02:47:41,854 INFO  L78                 Accepts]: Start accepts. Automaton has 5035 states and 8421 transitions. Word has length 3108
[2023-11-29 02:47:41,855 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:41,855 INFO  L495      AbstractCegarLoop]: Abstraction has 5035 states and 8421 transitions.
[2023-11-29 02:47:41,856 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 777.0) internal successors, (3108), 4 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:41,856 INFO  L276                IsEmpty]: Start isEmpty. Operand 5035 states and 8421 transitions.
[2023-11-29 02:47:41,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3109
[2023-11-29 02:47:41,897 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:41,899 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:41,928 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 02:47:42,099 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:42,099 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:42,100 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:42,101 INFO  L85        PathProgramCache]: Analyzing trace with hash 1705158843, now seen corresponding path program 1 times
[2023-11-29 02:47:42,101 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:42,101 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102168330]
[2023-11-29 02:47:42,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:42,102 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:42,301 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:42,301 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568881882]
[2023-11-29 02:47:42,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:42,302 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:42,302 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:42,303 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:42,304 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 02:47:44,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:45,056 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12618 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:47:45,113 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:45,299 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2023-11-29 02:47:45,299 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:45,299 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:45,299 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102168330]
[2023-11-29 02:47:45,299 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:45,299 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568881882]
[2023-11-29 02:47:45,299 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [568881882] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:45,299 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:45,300 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:47:45,300 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145503561]
[2023-11-29 02:47:45,301 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:45,304 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:47:45,304 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:45,307 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:47:45,307 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:47:45,308 INFO  L87              Difference]: Start difference. First operand 5035 states and 8421 transitions. Second operand  has 7 states, 7 states have (on average 404.7142857142857) internal successors, (2833), 7 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:45,662 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:45,663 INFO  L93              Difference]: Finished difference Result 14000 states and 23423 transitions.
[2023-11-29 02:47:45,663 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:47:45,664 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 404.7142857142857) internal successors, (2833), 7 states have internal predecessors, (2833), 0 states have call successors, (0), 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 3108
[2023-11-29 02:47:45,666 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:45,672 INFO  L225             Difference]: With dead ends: 14000
[2023-11-29 02:47:45,672 INFO  L226             Difference]: Without dead ends: 9514
[2023-11-29 02:47:45,676 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3117 GetRequests, 3105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:47:45,677 INFO  L413           NwaCegarLoop]: 8387 mSDtfsCounter, 21871 mSDsluCounter, 32842 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21871 SdHoareTripleChecker+Valid, 41229 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:45,677 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21871 Valid, 41229 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:47:45,684 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9514 states.
[2023-11-29 02:47:45,727 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9514 to 5037.
[2023-11-29 02:47:45,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5037 states, 5036 states have (on average 1.6725575853852264) internal successors, (8423), 5036 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:45,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 8423 transitions.
[2023-11-29 02:47:45,737 INFO  L78                 Accepts]: Start accepts. Automaton has 5037 states and 8423 transitions. Word has length 3108
[2023-11-29 02:47:45,738 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:45,738 INFO  L495      AbstractCegarLoop]: Abstraction has 5037 states and 8423 transitions.
[2023-11-29 02:47:45,739 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 404.7142857142857) internal successors, (2833), 7 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:45,739 INFO  L276                IsEmpty]: Start isEmpty. Operand 5037 states and 8423 transitions.
[2023-11-29 02:47:45,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3110
[2023-11-29 02:47:45,781 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:45,783 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:45,822 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 02:47:45,983 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:45,983 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:45,984 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:45,985 INFO  L85        PathProgramCache]: Analyzing trace with hash -2049644351, now seen corresponding path program 1 times
[2023-11-29 02:47:45,985 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:45,985 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337156426]
[2023-11-29 02:47:45,985 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:45,985 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:46,203 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:46,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777382944]
[2023-11-29 02:47:46,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:46,204 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:46,204 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:46,205 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:46,206 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 02:47:48,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:49,014 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12622 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:47:49,055 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:49,217 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2023-11-29 02:47:49,217 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:49,217 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:49,217 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337156426]
[2023-11-29 02:47:49,217 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:49,218 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777382944]
[2023-11-29 02:47:49,218 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777382944] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:49,218 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:49,218 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:47:49,219 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343738973]
[2023-11-29 02:47:49,219 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:49,221 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:47:49,221 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:49,223 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:47:49,223 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:47:49,224 INFO  L87              Difference]: Start difference. First operand 5037 states and 8423 transitions. Second operand  has 7 states, 7 states have (on average 405.14285714285717) internal successors, (2836), 7 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:49,597 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:49,597 INFO  L93              Difference]: Finished difference Result 14006 states and 23429 transitions.
[2023-11-29 02:47:49,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:47:49,598 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 405.14285714285717) internal successors, (2836), 7 states have internal predecessors, (2836), 0 states have call successors, (0), 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 3109
[2023-11-29 02:47:49,601 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:49,607 INFO  L225             Difference]: With dead ends: 14006
[2023-11-29 02:47:49,607 INFO  L226             Difference]: Without dead ends: 9515
[2023-11-29 02:47:49,610 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3118 GetRequests, 3106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:47:49,611 INFO  L413           NwaCegarLoop]: 8382 mSDtfsCounter, 21870 mSDsluCounter, 32827 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21870 SdHoareTripleChecker+Valid, 41209 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:49,611 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21870 Valid, 41209 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:47:49,619 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9515 states.
[2023-11-29 02:47:49,656 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 5039.
[2023-11-29 02:47:49,660 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5039 states, 5038 states have (on average 1.6722905915045654) internal successors, (8425), 5038 states have internal predecessors, (8425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:49,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 8425 transitions.
[2023-11-29 02:47:49,668 INFO  L78                 Accepts]: Start accepts. Automaton has 5039 states and 8425 transitions. Word has length 3109
[2023-11-29 02:47:49,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:49,669 INFO  L495      AbstractCegarLoop]: Abstraction has 5039 states and 8425 transitions.
[2023-11-29 02:47:49,670 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 405.14285714285717) internal successors, (2836), 7 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:49,670 INFO  L276                IsEmpty]: Start isEmpty. Operand 5039 states and 8425 transitions.
[2023-11-29 02:47:49,712 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3111
[2023-11-29 02:47:49,712 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:49,713 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:47:49,747 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:49,914 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 02:47:49,914 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:49,914 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:49,915 INFO  L85        PathProgramCache]: Analyzing trace with hash -1734518941, now seen corresponding path program 1 times
[2023-11-29 02:47:49,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:49,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193955467]
[2023-11-29 02:47:49,916 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:49,916 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:50,115 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:50,115 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500064330]
[2023-11-29 02:47:50,116 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:50,116 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:50,116 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:50,117 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:50,121 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 02:47:52,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:52,820 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12625 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:47:52,855 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:53,023 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2023-11-29 02:47:53,023 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:53,023 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:53,023 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193955467]
[2023-11-29 02:47:53,023 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:53,023 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500064330]
[2023-11-29 02:47:53,023 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500064330] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:53,024 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:53,024 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:47:53,025 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759294287]
[2023-11-29 02:47:53,025 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:53,027 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:47:53,027 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:53,029 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:47:53,029 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:47:53,030 INFO  L87              Difference]: Start difference. First operand 5039 states and 8425 transitions. Second operand  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:53,401 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:53,401 INFO  L93              Difference]: Finished difference Result 14012 states and 23435 transitions.
[2023-11-29 02:47:53,402 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:47:53,402 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 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 3110
[2023-11-29 02:47:53,404 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:53,410 INFO  L225             Difference]: With dead ends: 14012
[2023-11-29 02:47:53,410 INFO  L226             Difference]: Without dead ends: 9516
[2023-11-29 02:47:53,412 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3119 GetRequests, 3107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:47:53,413 INFO  L413           NwaCegarLoop]: 8377 mSDtfsCounter, 21869 mSDsluCounter, 32812 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21869 SdHoareTripleChecker+Valid, 41189 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:53,413 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21869 Valid, 41189 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:47:53,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9516 states.
[2023-11-29 02:47:53,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 5041.
[2023-11-29 02:47:53,483 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5041 states, 5040 states have (on average 1.6720238095238096) internal successors, (8427), 5040 states have internal predecessors, (8427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:53,490 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5041 states to 5041 states and 8427 transitions.
[2023-11-29 02:47:53,491 INFO  L78                 Accepts]: Start accepts. Automaton has 5041 states and 8427 transitions. Word has length 3110
[2023-11-29 02:47:53,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:53,493 INFO  L495      AbstractCegarLoop]: Abstraction has 5041 states and 8427 transitions.
[2023-11-29 02:47:53,494 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:53,494 INFO  L276                IsEmpty]: Start isEmpty. Operand 5041 states and 8427 transitions.
[2023-11-29 02:47:53,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3112
[2023-11-29 02:47:53,547 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:53,547 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:47:53,577 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 02:47:53,748 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:53,748 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:53,748 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:53,749 INFO  L85        PathProgramCache]: Analyzing trace with hash 223486491, now seen corresponding path program 1 times
[2023-11-29 02:47:53,749 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:53,749 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247109784]
[2023-11-29 02:47:53,750 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:53,750 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:53,959 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:53,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446750725]
[2023-11-29 02:47:53,960 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:53,961 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:53,961 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:53,961 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:53,962 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 02:47:56,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:47:56,663 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12628 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:47:56,701 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:47:56,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked.
[2023-11-29 02:47:56,852 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:47:56,852 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:47:56,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247109784]
[2023-11-29 02:47:56,852 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:47:56,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446750725]
[2023-11-29 02:47:56,853 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446750725] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:47:56,853 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:47:56,854 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:47:56,854 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941213517]
[2023-11-29 02:47:56,854 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:47:56,856 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:47:56,856 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:47:56,859 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:47:56,859 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:47:56,860 INFO  L87              Difference]: Start difference. First operand 5041 states and 8427 transitions. Second operand  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:57,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:47:57,165 INFO  L93              Difference]: Finished difference Result 14018 states and 23441 transitions.
[2023-11-29 02:47:57,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:47:57,166 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 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 3111
[2023-11-29 02:47:57,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:47:57,175 INFO  L225             Difference]: With dead ends: 14018
[2023-11-29 02:47:57,175 INFO  L226             Difference]: Without dead ends: 9517
[2023-11-29 02:47:57,179 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3120 GetRequests, 3108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:47:57,179 INFO  L413           NwaCegarLoop]: 8372 mSDtfsCounter, 21868 mSDsluCounter, 32797 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21868 SdHoareTripleChecker+Valid, 41169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:47:57,179 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21868 Valid, 41169 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:47:57,186 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9517 states.
[2023-11-29 02:47:57,227 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 5043.
[2023-11-29 02:47:57,231 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5043 states, 5042 states have (on average 1.6717572391907973) internal successors, (8429), 5042 states have internal predecessors, (8429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:57,236 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 8429 transitions.
[2023-11-29 02:47:57,236 INFO  L78                 Accepts]: Start accepts. Automaton has 5043 states and 8429 transitions. Word has length 3111
[2023-11-29 02:47:57,238 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:47:57,238 INFO  L495      AbstractCegarLoop]: Abstraction has 5043 states and 8429 transitions.
[2023-11-29 02:47:57,239 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:47:57,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 5043 states and 8429 transitions.
[2023-11-29 02:47:57,281 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3113
[2023-11-29 02:47:57,281 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:47:57,282 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:47:57,315 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-29 02:47:57,482 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:57,482 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:47:57,483 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:47:57,483 INFO  L85        PathProgramCache]: Analyzing trace with hash -463668471, now seen corresponding path program 1 times
[2023-11-29 02:47:57,483 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:47:57,483 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512557142]
[2023-11-29 02:47:57,484 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:57,484 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:47:57,681 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:47:57,681 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616855360]
[2023-11-29 02:47:57,682 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:47:57,682 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:47:57,682 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:47:57,683 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:47:57,684 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 02:48:00,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:00,261 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12631 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:00,296 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:00,444 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2023-11-29 02:48:00,444 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:00,444 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:00,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512557142]
[2023-11-29 02:48:00,444 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:00,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616855360]
[2023-11-29 02:48:00,444 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616855360] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:00,444 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:00,445 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:00,445 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481570758]
[2023-11-29 02:48:00,445 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:00,446 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:00,447 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:00,448 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:00,449 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:00,449 INFO  L87              Difference]: Start difference. First operand 5043 states and 8429 transitions. Second operand  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:00,750 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:00,750 INFO  L93              Difference]: Finished difference Result 14024 states and 23447 transitions.
[2023-11-29 02:48:00,751 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:00,751 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 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 3112
[2023-11-29 02:48:00,754 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:00,760 INFO  L225             Difference]: With dead ends: 14024
[2023-11-29 02:48:00,760 INFO  L226             Difference]: Without dead ends: 9518
[2023-11-29 02:48:00,763 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3121 GetRequests, 3109 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:00,764 INFO  L413           NwaCegarLoop]: 8367 mSDtfsCounter, 21867 mSDsluCounter, 32782 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21867 SdHoareTripleChecker+Valid, 41149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:00,764 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21867 Valid, 41149 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:48:00,772 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9518 states.
[2023-11-29 02:48:00,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 5045.
[2023-11-29 02:48:00,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5045 states, 5044 states have (on average 1.671490880253767) internal successors, (8431), 5044 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:00,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 8431 transitions.
[2023-11-29 02:48:00,821 INFO  L78                 Accepts]: Start accepts. Automaton has 5045 states and 8431 transitions. Word has length 3112
[2023-11-29 02:48:00,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:00,823 INFO  L495      AbstractCegarLoop]: Abstraction has 5045 states and 8431 transitions.
[2023-11-29 02:48:00,823 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:00,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 5045 states and 8431 transitions.
[2023-11-29 02:48:00,865 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3114
[2023-11-29 02:48:00,865 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:00,866 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:00,896 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 02:48:01,066 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-29 02:48:01,067 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:01,067 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:01,067 INFO  L85        PathProgramCache]: Analyzing trace with hash -1962966153, now seen corresponding path program 1 times
[2023-11-29 02:48:01,067 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:01,067 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081414457]
[2023-11-29 02:48:01,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:01,068 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:01,273 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:01,274 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270992183]
[2023-11-29 02:48:01,274 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:01,274 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:01,274 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:01,275 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:01,276 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 02:48:03,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:03,890 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12635 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:03,921 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:04,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked.
[2023-11-29 02:48:04,061 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:04,061 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:04,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081414457]
[2023-11-29 02:48:04,061 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:04,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270992183]
[2023-11-29 02:48:04,061 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [270992183] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:04,061 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:04,062 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:04,062 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777373342]
[2023-11-29 02:48:04,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:04,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:04,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:04,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:04,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:04,066 INFO  L87              Difference]: Start difference. First operand 5045 states and 8431 transitions. Second operand  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:04,374 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:04,374 INFO  L93              Difference]: Finished difference Result 14030 states and 23453 transitions.
[2023-11-29 02:48:04,374 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:04,375 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 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 3113
[2023-11-29 02:48:04,377 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:04,384 INFO  L225             Difference]: With dead ends: 14030
[2023-11-29 02:48:04,384 INFO  L226             Difference]: Without dead ends: 9519
[2023-11-29 02:48:04,387 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3122 GetRequests, 3110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:04,388 INFO  L413           NwaCegarLoop]: 8362 mSDtfsCounter, 21866 mSDsluCounter, 32767 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21866 SdHoareTripleChecker+Valid, 41129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:04,388 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21866 Valid, 41129 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:48:04,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9519 states.
[2023-11-29 02:48:04,438 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9519 to 5047.
[2023-11-29 02:48:04,442 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5047 states, 5046 states have (on average 1.6712247324613556) internal successors, (8433), 5046 states have internal predecessors, (8433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:04,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 8433 transitions.
[2023-11-29 02:48:04,447 INFO  L78                 Accepts]: Start accepts. Automaton has 5047 states and 8433 transitions. Word has length 3113
[2023-11-29 02:48:04,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:04,449 INFO  L495      AbstractCegarLoop]: Abstraction has 5047 states and 8433 transitions.
[2023-11-29 02:48:04,450 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:04,450 INFO  L276                IsEmpty]: Start isEmpty. Operand 5047 states and 8433 transitions.
[2023-11-29 02:48:04,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:48:04,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:04,513 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 02:48:04,543 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 02:48:04,713 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-29 02:48:04,713 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:04,714 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:04,714 INFO  L85        PathProgramCache]: Analyzing trace with hash 478354097, now seen corresponding path program 1 times
[2023-11-29 02:48:04,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:04,714 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375132110]
[2023-11-29 02:48:04,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:04,715 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:04,918 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:04,918 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190383473]
[2023-11-29 02:48:04,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:04,919 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:04,919 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:04,920 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:04,920 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 02:48:07,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:07,552 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12638 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:07,583 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:07,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2023-11-29 02:48:07,722 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:07,722 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:07,722 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375132110]
[2023-11-29 02:48:07,722 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:07,722 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190383473]
[2023-11-29 02:48:07,722 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190383473] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:07,722 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:07,723 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:07,723 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325963015]
[2023-11-29 02:48:07,723 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:07,725 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:07,725 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:07,727 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:07,727 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:07,728 INFO  L87              Difference]: Start difference. First operand 5047 states and 8433 transitions. Second operand  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:08,043 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:08,044 INFO  L93              Difference]: Finished difference Result 14036 states and 23459 transitions.
[2023-11-29 02:48:08,044 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:08,045 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 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 3114
[2023-11-29 02:48:08,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:08,054 INFO  L225             Difference]: With dead ends: 14036
[2023-11-29 02:48:08,054 INFO  L226             Difference]: Without dead ends: 9520
[2023-11-29 02:48:08,057 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3123 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:08,058 INFO  L413           NwaCegarLoop]: 8357 mSDtfsCounter, 21865 mSDsluCounter, 32752 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21865 SdHoareTripleChecker+Valid, 41109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:08,058 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21865 Valid, 41109 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:08,065 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9520 states.
[2023-11-29 02:48:08,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 5049.
[2023-11-29 02:48:08,110 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5049 states, 5048 states have (on average 1.670958795562599) internal successors, (8435), 5048 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:08,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 8435 transitions.
[2023-11-29 02:48:08,115 INFO  L78                 Accepts]: Start accepts. Automaton has 5049 states and 8435 transitions. Word has length 3114
[2023-11-29 02:48:08,117 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:08,117 INFO  L495      AbstractCegarLoop]: Abstraction has 5049 states and 8435 transitions.
[2023-11-29 02:48:08,117 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:08,117 INFO  L276                IsEmpty]: Start isEmpty. Operand 5049 states and 8435 transitions.
[2023-11-29 02:48:08,158 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3116
[2023-11-29 02:48:08,158 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:08,159 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:08,190 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2023-11-29 02:48:08,360 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 02:48:08,360 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:08,360 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:08,361 INFO  L85        PathProgramCache]: Analyzing trace with hash -1505691439, now seen corresponding path program 1 times
[2023-11-29 02:48:08,361 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:08,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340830434]
[2023-11-29 02:48:08,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:08,361 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:08,559 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:08,559 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030891259]
[2023-11-29 02:48:08,559 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:08,559 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:08,560 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:08,560 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:08,561 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 02:48:11,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:11,186 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12641 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:11,219 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:11,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked.
[2023-11-29 02:48:11,363 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:11,363 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:11,363 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340830434]
[2023-11-29 02:48:11,363 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:11,363 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030891259]
[2023-11-29 02:48:11,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030891259] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:11,363 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:11,364 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:11,364 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939684220]
[2023-11-29 02:48:11,364 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:11,365 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:11,365 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:11,367 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:11,367 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:11,368 INFO  L87              Difference]: Start difference. First operand 5049 states and 8435 transitions. Second operand  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:11,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:11,696 INFO  L93              Difference]: Finished difference Result 14042 states and 23465 transitions.
[2023-11-29 02:48:11,696 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:11,697 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 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 3115
[2023-11-29 02:48:11,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:11,704 INFO  L225             Difference]: With dead ends: 14042
[2023-11-29 02:48:11,704 INFO  L226             Difference]: Without dead ends: 9521
[2023-11-29 02:48:11,706 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3124 GetRequests, 3112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:11,706 INFO  L413           NwaCegarLoop]: 8352 mSDtfsCounter, 21864 mSDsluCounter, 32737 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21864 SdHoareTripleChecker+Valid, 41089 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:11,707 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21864 Valid, 41089 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:48:11,712 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9521 states.
[2023-11-29 02:48:11,751 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 5051.
[2023-11-29 02:48:11,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5051 states, 5050 states have (on average 1.6706930693069306) internal successors, (8437), 5050 states have internal predecessors, (8437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:11,761 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8437 transitions.
[2023-11-29 02:48:11,761 INFO  L78                 Accepts]: Start accepts. Automaton has 5051 states and 8437 transitions. Word has length 3115
[2023-11-29 02:48:11,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:11,763 INFO  L495      AbstractCegarLoop]: Abstraction has 5051 states and 8437 transitions.
[2023-11-29 02:48:11,764 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:11,764 INFO  L276                IsEmpty]: Start isEmpty. Operand 5051 states and 8437 transitions.
[2023-11-29 02:48:11,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3117
[2023-11-29 02:48:11,810 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:11,811 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:11,841 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-29 02:48:12,012 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:12,012 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:12,012 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:12,013 INFO  L85        PathProgramCache]: Analyzing trace with hash 256467543, now seen corresponding path program 1 times
[2023-11-29 02:48:12,013 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:12,013 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706304557]
[2023-11-29 02:48:12,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:12,013 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:12,222 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:12,222 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219085332]
[2023-11-29 02:48:12,223 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:12,223 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:12,223 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:12,224 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:12,225 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 02:48:14,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:14,997 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12644 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:48:15,029 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:15,177 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked.
[2023-11-29 02:48:15,177 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:15,177 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:15,177 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706304557]
[2023-11-29 02:48:15,177 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:15,178 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219085332]
[2023-11-29 02:48:15,178 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219085332] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:15,178 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:15,179 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:48:15,179 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112881729]
[2023-11-29 02:48:15,179 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:15,181 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:48:15,181 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:15,182 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:48:15,182 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:48:15,183 INFO  L87              Difference]: Start difference. First operand 5051 states and 8437 transitions. Second operand  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:15,549 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:15,549 INFO  L93              Difference]: Finished difference Result 14048 states and 23471 transitions.
[2023-11-29 02:48:15,550 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:15,550 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 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 3116
[2023-11-29 02:48:15,552 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:15,559 INFO  L225             Difference]: With dead ends: 14048
[2023-11-29 02:48:15,559 INFO  L226             Difference]: Without dead ends: 9522
[2023-11-29 02:48:15,562 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3125 GetRequests, 3112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 02:48:15,563 INFO  L413           NwaCegarLoop]: 8347 mSDtfsCounter, 21863 mSDsluCounter, 41066 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21863 SdHoareTripleChecker+Valid, 49413 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:15,563 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21863 Valid, 49413 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:15,571 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9522 states.
[2023-11-29 02:48:15,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 5053.
[2023-11-29 02:48:15,617 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5053 states, 5052 states have (on average 1.6704275534441806) internal successors, (8439), 5052 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:15,623 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8439 transitions.
[2023-11-29 02:48:15,623 INFO  L78                 Accepts]: Start accepts. Automaton has 5053 states and 8439 transitions. Word has length 3116
[2023-11-29 02:48:15,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:15,625 INFO  L495      AbstractCegarLoop]: Abstraction has 5053 states and 8439 transitions.
[2023-11-29 02:48:15,625 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:15,625 INFO  L276                IsEmpty]: Start isEmpty. Operand 5053 states and 8439 transitions.
[2023-11-29 02:48:15,667 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3118
[2023-11-29 02:48:15,667 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:15,668 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:15,700 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 02:48:15,868 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-29 02:48:15,868 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:15,869 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:15,869 INFO  L85        PathProgramCache]: Analyzing trace with hash 455861037, now seen corresponding path program 1 times
[2023-11-29 02:48:15,869 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:15,869 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878504298]
[2023-11-29 02:48:15,870 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:15,870 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:16,074 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:16,074 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898013846]
[2023-11-29 02:48:16,075 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:16,075 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:16,075 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:16,076 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:16,076 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 02:48:18,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:18,938 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12648 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:18,968 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:19,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2023-11-29 02:48:19,110 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:19,110 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:19,110 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878504298]
[2023-11-29 02:48:19,110 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:19,110 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898013846]
[2023-11-29 02:48:19,110 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [898013846] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:19,110 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:19,111 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:19,112 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260655139]
[2023-11-29 02:48:19,112 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:19,113 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:19,114 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:19,115 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:19,116 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:19,116 INFO  L87              Difference]: Start difference. First operand 5053 states and 8439 transitions. Second operand  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:19,425 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:19,425 INFO  L93              Difference]: Finished difference Result 14054 states and 23477 transitions.
[2023-11-29 02:48:19,425 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:19,426 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 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 3117
[2023-11-29 02:48:19,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:19,435 INFO  L225             Difference]: With dead ends: 14054
[2023-11-29 02:48:19,435 INFO  L226             Difference]: Without dead ends: 9523
[2023-11-29 02:48:19,438 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3126 GetRequests, 3114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:19,439 INFO  L413           NwaCegarLoop]: 8342 mSDtfsCounter, 21862 mSDsluCounter, 32707 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21862 SdHoareTripleChecker+Valid, 41049 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:19,439 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21862 Valid, 41049 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:19,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9523 states.
[2023-11-29 02:48:19,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 5055.
[2023-11-29 02:48:19,486 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5055 states, 5054 states have (on average 1.6701622477245746) internal successors, (8441), 5054 states have internal predecessors, (8441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:19,490 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 8441 transitions.
[2023-11-29 02:48:19,490 INFO  L78                 Accepts]: Start accepts. Automaton has 5055 states and 8441 transitions. Word has length 3117
[2023-11-29 02:48:19,492 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:19,492 INFO  L495      AbstractCegarLoop]: Abstraction has 5055 states and 8441 transitions.
[2023-11-29 02:48:19,492 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:19,493 INFO  L276                IsEmpty]: Start isEmpty. Operand 5055 states and 8441 transitions.
[2023-11-29 02:48:19,542 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3119
[2023-11-29 02:48:19,542 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:19,543 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:19,576 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 02:48:19,744 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:19,744 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:19,744 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:19,745 INFO  L85        PathProgramCache]: Analyzing trace with hash -1306856705, now seen corresponding path program 1 times
[2023-11-29 02:48:19,745 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:19,745 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956322204]
[2023-11-29 02:48:19,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:19,746 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:19,941 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:19,941 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305081961]
[2023-11-29 02:48:19,942 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:19,942 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:19,942 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:19,943 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:19,944 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 02:48:22,645 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:22,710 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12651 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:22,740 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:22,879 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked.
[2023-11-29 02:48:22,879 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:22,879 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:22,879 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956322204]
[2023-11-29 02:48:22,879 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:22,879 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305081961]
[2023-11-29 02:48:22,879 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305081961] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:22,879 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:22,880 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:22,880 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055795760]
[2023-11-29 02:48:22,880 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:22,882 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:22,882 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:22,884 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:22,884 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:22,884 INFO  L87              Difference]: Start difference. First operand 5055 states and 8441 transitions. Second operand  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:23,186 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:23,186 INFO  L93              Difference]: Finished difference Result 14060 states and 23483 transitions.
[2023-11-29 02:48:23,186 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:23,187 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 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 3118
[2023-11-29 02:48:23,189 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:23,196 INFO  L225             Difference]: With dead ends: 14060
[2023-11-29 02:48:23,196 INFO  L226             Difference]: Without dead ends: 9524
[2023-11-29 02:48:23,200 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3127 GetRequests, 3115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:23,200 INFO  L413           NwaCegarLoop]: 8337 mSDtfsCounter, 21861 mSDsluCounter, 32692 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21861 SdHoareTripleChecker+Valid, 41029 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:23,200 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21861 Valid, 41029 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:48:23,208 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9524 states.
[2023-11-29 02:48:23,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 5057.
[2023-11-29 02:48:23,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5057 states, 5056 states have (on average 1.6698971518987342) internal successors, (8443), 5056 states have internal predecessors, (8443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:23,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 8443 transitions.
[2023-11-29 02:48:23,261 INFO  L78                 Accepts]: Start accepts. Automaton has 5057 states and 8443 transitions. Word has length 3118
[2023-11-29 02:48:23,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:23,263 INFO  L495      AbstractCegarLoop]: Abstraction has 5057 states and 8443 transitions.
[2023-11-29 02:48:23,263 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:23,263 INFO  L276                IsEmpty]: Start isEmpty. Operand 5057 states and 8443 transitions.
[2023-11-29 02:48:23,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3120
[2023-11-29 02:48:23,306 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:23,307 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:23,337 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-29 02:48:23,507 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:23,508 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:23,508 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:23,509 INFO  L85        PathProgramCache]: Analyzing trace with hash 96867463, now seen corresponding path program 1 times
[2023-11-29 02:48:23,509 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:23,509 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176625626]
[2023-11-29 02:48:23,509 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:23,509 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:23,706 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:23,706 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544658915]
[2023-11-29 02:48:23,706 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:23,706 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:23,707 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:23,707 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:23,708 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 02:48:26,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:26,478 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12654 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:26,511 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:26,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked.
[2023-11-29 02:48:26,646 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:26,646 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:26,646 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176625626]
[2023-11-29 02:48:26,646 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:26,646 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544658915]
[2023-11-29 02:48:26,646 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544658915] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:26,646 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:26,647 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:26,648 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395325296]
[2023-11-29 02:48:26,648 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:26,649 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:26,649 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:26,651 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:26,651 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:26,651 INFO  L87              Difference]: Start difference. First operand 5057 states and 8443 transitions. Second operand  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:26,966 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:26,966 INFO  L93              Difference]: Finished difference Result 14066 states and 23489 transitions.
[2023-11-29 02:48:26,966 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:26,967 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 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 3119
[2023-11-29 02:48:26,969 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:26,976 INFO  L225             Difference]: With dead ends: 14066
[2023-11-29 02:48:26,976 INFO  L226             Difference]: Without dead ends: 9525
[2023-11-29 02:48:26,980 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3128 GetRequests, 3116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:26,980 INFO  L413           NwaCegarLoop]: 8332 mSDtfsCounter, 21860 mSDsluCounter, 32677 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21860 SdHoareTripleChecker+Valid, 41009 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:26,980 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21860 Valid, 41009 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:26,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9525 states.
[2023-11-29 02:48:27,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9525 to 5059.
[2023-11-29 02:48:27,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5059 states, 5058 states have (on average 1.669632265717675) internal successors, (8445), 5058 states have internal predecessors, (8445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:27,033 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 8445 transitions.
[2023-11-29 02:48:27,033 INFO  L78                 Accepts]: Start accepts. Automaton has 5059 states and 8445 transitions. Word has length 3119
[2023-11-29 02:48:27,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:27,034 INFO  L495      AbstractCegarLoop]: Abstraction has 5059 states and 8445 transitions.
[2023-11-29 02:48:27,035 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:27,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 5059 states and 8445 transitions.
[2023-11-29 02:48:27,076 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3121
[2023-11-29 02:48:27,076 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:27,077 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:48:27,107 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-29 02:48:27,277 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:27,277 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:27,278 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:27,278 INFO  L85        PathProgramCache]: Analyzing trace with hash 1490247333, now seen corresponding path program 1 times
[2023-11-29 02:48:27,278 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:27,278 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601568707]
[2023-11-29 02:48:27,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:27,279 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:27,482 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:27,482 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494145330]
[2023-11-29 02:48:27,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:27,483 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:27,483 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:27,484 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:27,485 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 02:48:30,083 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:30,155 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12657 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:30,188 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:30,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked.
[2023-11-29 02:48:30,336 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:30,336 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:30,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601568707]
[2023-11-29 02:48:30,336 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:30,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494145330]
[2023-11-29 02:48:30,336 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [494145330] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:30,337 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:30,337 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:30,337 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155740302]
[2023-11-29 02:48:30,337 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:30,339 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:30,339 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:30,340 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:30,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:30,341 INFO  L87              Difference]: Start difference. First operand 5059 states and 8445 transitions. Second operand  has 7 states, 7 states have (on average 410.14285714285717) internal successors, (2871), 7 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:30,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:30,667 INFO  L93              Difference]: Finished difference Result 14075 states and 23500 transitions.
[2023-11-29 02:48:30,667 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:30,667 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 410.14285714285717) internal successors, (2871), 7 states have internal predecessors, (2871), 0 states have call successors, (0), 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 3120
[2023-11-29 02:48:30,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:30,676 INFO  L225             Difference]: With dead ends: 14075
[2023-11-29 02:48:30,676 INFO  L226             Difference]: Without dead ends: 9529
[2023-11-29 02:48:30,679 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3129 GetRequests, 3117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:30,680 INFO  L413           NwaCegarLoop]: 8322 mSDtfsCounter, 21862 mSDsluCounter, 32647 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21862 SdHoareTripleChecker+Valid, 40969 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:30,680 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21862 Valid, 40969 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:30,687 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9529 states.
[2023-11-29 02:48:30,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 5064.
[2023-11-29 02:48:30,735 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5064 states, 5063 states have (on average 1.6693659885443413) internal successors, (8452), 5063 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:30,740 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 8452 transitions.
[2023-11-29 02:48:30,740 INFO  L78                 Accepts]: Start accepts. Automaton has 5064 states and 8452 transitions. Word has length 3120
[2023-11-29 02:48:30,742 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:30,742 INFO  L495      AbstractCegarLoop]: Abstraction has 5064 states and 8452 transitions.
[2023-11-29 02:48:30,742 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 410.14285714285717) internal successors, (2871), 7 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:30,742 INFO  L276                IsEmpty]: Start isEmpty. Operand 5064 states and 8452 transitions.
[2023-11-29 02:48:30,784 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3122
[2023-11-29 02:48:30,784 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:30,785 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:30,815 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 02:48:30,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32
[2023-11-29 02:48:30,985 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:30,986 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:30,986 INFO  L85        PathProgramCache]: Analyzing trace with hash 2009649403, now seen corresponding path program 1 times
[2023-11-29 02:48:30,986 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:30,986 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538695202]
[2023-11-29 02:48:30,987 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:30,987 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:31,186 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:31,186 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64215618]
[2023-11-29 02:48:31,186 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:31,187 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:31,187 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:31,187 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:31,188 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 02:48:33,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:33,829 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12660 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:33,858 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:34,025 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked.
[2023-11-29 02:48:34,025 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:34,025 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:34,025 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538695202]
[2023-11-29 02:48:34,026 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:34,026 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64215618]
[2023-11-29 02:48:34,026 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [64215618] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:34,026 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:34,026 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:34,026 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131977451]
[2023-11-29 02:48:34,027 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:34,028 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:34,028 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:34,030 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:34,030 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:34,031 INFO  L87              Difference]: Start difference. First operand 5064 states and 8452 transitions. Second operand  has 7 states, 7 states have (on average 410.57142857142856) internal successors, (2874), 7 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:34,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:34,343 INFO  L93              Difference]: Finished difference Result 14087 states and 23516 transitions.
[2023-11-29 02:48:34,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:34,344 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 410.57142857142856) internal successors, (2874), 7 states have internal predecessors, (2874), 0 states have call successors, (0), 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 3121
[2023-11-29 02:48:34,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:34,353 INFO  L225             Difference]: With dead ends: 14087
[2023-11-29 02:48:34,353 INFO  L226             Difference]: Without dead ends: 9530
[2023-11-29 02:48:34,356 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 3118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:34,357 INFO  L413           NwaCegarLoop]: 8317 mSDtfsCounter, 21863 mSDsluCounter, 32632 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21863 SdHoareTripleChecker+Valid, 40949 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:34,357 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21863 Valid, 40949 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:34,364 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9530 states.
[2023-11-29 02:48:34,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9530 to 5066.
[2023-11-29 02:48:34,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5066 states, 5065 states have (on average 1.669101678183613) internal successors, (8454), 5065 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:34,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 8454 transitions.
[2023-11-29 02:48:34,414 INFO  L78                 Accepts]: Start accepts. Automaton has 5066 states and 8454 transitions. Word has length 3121
[2023-11-29 02:48:34,415 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:34,415 INFO  L495      AbstractCegarLoop]: Abstraction has 5066 states and 8454 transitions.
[2023-11-29 02:48:34,416 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 410.57142857142856) internal successors, (2874), 7 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:34,416 INFO  L276                IsEmpty]: Start isEmpty. Operand 5066 states and 8454 transitions.
[2023-11-29 02:48:34,456 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3123
[2023-11-29 02:48:34,457 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:34,457 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:34,487 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0
[2023-11-29 02:48:34,658 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-29 02:48:34,658 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:34,658 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:34,659 INFO  L85        PathProgramCache]: Analyzing trace with hash 2052840971, now seen corresponding path program 1 times
[2023-11-29 02:48:34,659 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:34,659 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144147973]
[2023-11-29 02:48:34,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:34,659 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:34,860 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:34,860 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648808558]
[2023-11-29 02:48:34,861 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:34,861 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:34,861 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:34,862 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:34,862 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-29 02:48:37,504 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:37,569 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12663 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:37,601 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:37,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked.
[2023-11-29 02:48:37,744 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:37,744 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:37,744 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144147973]
[2023-11-29 02:48:37,744 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:37,745 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648808558]
[2023-11-29 02:48:37,745 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [648808558] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:37,745 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:37,746 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:37,746 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386596547]
[2023-11-29 02:48:37,746 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:37,748 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:37,748 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:37,749 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:37,750 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:37,750 INFO  L87              Difference]: Start difference. First operand 5066 states and 8454 transitions. Second operand  has 7 states, 7 states have (on average 411.2857142857143) internal successors, (2879), 7 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:38,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:38,058 INFO  L93              Difference]: Finished difference Result 14096 states and 23527 transitions.
[2023-11-29 02:48:38,059 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:38,059 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 411.2857142857143) internal successors, (2879), 7 states have internal predecessors, (2879), 0 states have call successors, (0), 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 3122
[2023-11-29 02:48:38,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:38,068 INFO  L225             Difference]: With dead ends: 14096
[2023-11-29 02:48:38,068 INFO  L226             Difference]: Without dead ends: 9534
[2023-11-29 02:48:38,072 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3131 GetRequests, 3119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:38,072 INFO  L413           NwaCegarLoop]: 8307 mSDtfsCounter, 21865 mSDsluCounter, 32602 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21865 SdHoareTripleChecker+Valid, 40909 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:38,072 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21865 Valid, 40909 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:38,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9534 states.
[2023-11-29 02:48:38,116 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 5071.
[2023-11-29 02:48:38,119 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5071 states, 5070 states have (on average 1.668836291913215) internal successors, (8461), 5070 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:38,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 8461 transitions.
[2023-11-29 02:48:38,124 INFO  L78                 Accepts]: Start accepts. Automaton has 5071 states and 8461 transitions. Word has length 3122
[2023-11-29 02:48:38,125 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:38,125 INFO  L495      AbstractCegarLoop]: Abstraction has 5071 states and 8461 transitions.
[2023-11-29 02:48:38,126 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 411.2857142857143) internal successors, (2879), 7 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:38,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 5071 states and 8461 transitions.
[2023-11-29 02:48:38,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3124
[2023-11-29 02:48:38,167 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:38,168 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:38,200 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-29 02:48:38,368 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-29 02:48:38,369 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:38,369 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:38,370 INFO  L85        PathProgramCache]: Analyzing trace with hash -418016975, now seen corresponding path program 1 times
[2023-11-29 02:48:38,370 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:38,370 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103511620]
[2023-11-29 02:48:38,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:38,371 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:38,607 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:38,607 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750992235]
[2023-11-29 02:48:38,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:38,608 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:38,608 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:38,609 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:38,610 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-29 02:48:41,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:41,162 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12667 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:41,191 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:41,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked.
[2023-11-29 02:48:41,324 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:41,325 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:41,325 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103511620]
[2023-11-29 02:48:41,325 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:41,325 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750992235]
[2023-11-29 02:48:41,325 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750992235] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:41,325 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:41,326 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:41,326 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628854892]
[2023-11-29 02:48:41,326 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:41,327 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:41,327 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:41,329 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:41,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:41,330 INFO  L87              Difference]: Start difference. First operand 5071 states and 8461 transitions. Second operand  has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:41,654 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:41,654 INFO  L93              Difference]: Finished difference Result 14111 states and 23548 transitions.
[2023-11-29 02:48:41,655 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:41,656 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 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 3123
[2023-11-29 02:48:41,658 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:41,664 INFO  L225             Difference]: With dead ends: 14111
[2023-11-29 02:48:41,664 INFO  L226             Difference]: Without dead ends: 9538
[2023-11-29 02:48:41,667 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3132 GetRequests, 3120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:41,667 INFO  L413           NwaCegarLoop]: 8297 mSDtfsCounter, 21869 mSDsluCounter, 32572 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21869 SdHoareTripleChecker+Valid, 40869 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:41,667 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21869 Valid, 40869 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:41,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9538 states.
[2023-11-29 02:48:41,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 5076.
[2023-11-29 02:48:41,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5076 states, 5075 states have (on average 1.6685714285714286) internal successors, (8468), 5075 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:41,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 8468 transitions.
[2023-11-29 02:48:41,720 INFO  L78                 Accepts]: Start accepts. Automaton has 5076 states and 8468 transitions. Word has length 3123
[2023-11-29 02:48:41,722 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:41,722 INFO  L495      AbstractCegarLoop]: Abstraction has 5076 states and 8468 transitions.
[2023-11-29 02:48:41,723 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:41,723 INFO  L276                IsEmpty]: Start isEmpty. Operand 5076 states and 8468 transitions.
[2023-11-29 02:48:41,765 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3125
[2023-11-29 02:48:41,765 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:41,766 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:41,804 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0
[2023-11-29 02:48:41,966 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-29 02:48:41,967 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:41,967 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:41,967 INFO  L85        PathProgramCache]: Analyzing trace with hash -733612071, now seen corresponding path program 1 times
[2023-11-29 02:48:41,967 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:41,967 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831935000]
[2023-11-29 02:48:41,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:41,968 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:42,166 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:42,166 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729244531]
[2023-11-29 02:48:42,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:42,167 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:42,167 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:42,168 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:42,169 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-29 02:48:44,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:44,842 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12670 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:44,875 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:45,026 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked.
[2023-11-29 02:48:45,026 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:45,027 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:45,027 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831935000]
[2023-11-29 02:48:45,027 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:45,027 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729244531]
[2023-11-29 02:48:45,027 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [729244531] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:45,027 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:45,028 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:45,028 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977440453]
[2023-11-29 02:48:45,028 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:45,030 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:45,030 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:45,033 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:45,033 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:45,034 INFO  L87              Difference]: Start difference. First operand 5076 states and 8468 transitions. Second operand  has 7 states, 7 states have (on average 412.42857142857144) internal successors, (2887), 7 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:45,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:45,341 INFO  L93              Difference]: Finished difference Result 14123 states and 23564 transitions.
[2023-11-29 02:48:45,341 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:45,342 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 412.42857142857144) internal successors, (2887), 7 states have internal predecessors, (2887), 0 states have call successors, (0), 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 3124
[2023-11-29 02:48:45,344 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:45,351 INFO  L225             Difference]: With dead ends: 14123
[2023-11-29 02:48:45,352 INFO  L226             Difference]: Without dead ends: 9539
[2023-11-29 02:48:45,355 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3133 GetRequests, 3121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:45,355 INFO  L413           NwaCegarLoop]: 8292 mSDtfsCounter, 21870 mSDsluCounter, 32557 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21870 SdHoareTripleChecker+Valid, 40849 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:45,355 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21870 Valid, 40849 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:45,362 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9539 states.
[2023-11-29 02:48:45,399 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9539 to 5078.
[2023-11-29 02:48:45,403 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5078 states, 5077 states have (on average 1.6683080559385464) internal successors, (8470), 5077 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:45,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 8470 transitions.
[2023-11-29 02:48:45,408 INFO  L78                 Accepts]: Start accepts. Automaton has 5078 states and 8470 transitions. Word has length 3124
[2023-11-29 02:48:45,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:45,409 INFO  L495      AbstractCegarLoop]: Abstraction has 5078 states and 8470 transitions.
[2023-11-29 02:48:45,410 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 412.42857142857144) internal successors, (2887), 7 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:45,410 INFO  L276                IsEmpty]: Start isEmpty. Operand 5078 states and 8470 transitions.
[2023-11-29 02:48:45,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3126
[2023-11-29 02:48:45,451 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:45,452 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:45,483 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0
[2023-11-29 02:48:45,652 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-29 02:48:45,652 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:45,653 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:45,653 INFO  L85        PathProgramCache]: Analyzing trace with hash -1085444277, now seen corresponding path program 1 times
[2023-11-29 02:48:45,654 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:45,654 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055000545]
[2023-11-29 02:48:45,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:45,654 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:45,856 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:45,856 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201613215]
[2023-11-29 02:48:45,857 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:45,857 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:45,857 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:45,858 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:45,858 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-29 02:48:48,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:48,616 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12673 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:48:48,647 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:48,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked.
[2023-11-29 02:48:48,872 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:48,872 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:48,872 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055000545]
[2023-11-29 02:48:48,872 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:48,872 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201613215]
[2023-11-29 02:48:48,872 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [201613215] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:48,872 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:48,873 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:48:48,873 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933840423]
[2023-11-29 02:48:48,873 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:48,876 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:48:48,876 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:48,878 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:48:48,878 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:48:48,879 INFO  L87              Difference]: Start difference. First operand 5078 states and 8470 transitions. Second operand  has 8 states, 8 states have (on average 361.5) internal successors, (2892), 8 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:49,243 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:49,244 INFO  L93              Difference]: Finished difference Result 14134 states and 23577 transitions.
[2023-11-29 02:48:49,244 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-11-29 02:48:49,245 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 361.5) internal successors, (2892), 8 states have internal predecessors, (2892), 0 states have call successors, (0), 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 3125
[2023-11-29 02:48:49,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:49,255 INFO  L225             Difference]: With dead ends: 14134
[2023-11-29 02:48:49,255 INFO  L226             Difference]: Without dead ends: 9545
[2023-11-29 02:48:49,259 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3135 GetRequests, 3121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2023-11-29 02:48:49,259 INFO  L413           NwaCegarLoop]: 8281 mSDtfsCounter, 21871 mSDsluCounter, 40798 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21871 SdHoareTripleChecker+Valid, 49079 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:49,259 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21871 Valid, 49079 Invalid, 74 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:49,267 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9545 states.
[2023-11-29 02:48:49,308 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 5083.
[2023-11-29 02:48:49,312 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5083 states, 5082 states have (on average 1.6680440771349863) internal successors, (8477), 5082 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:49,316 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 8477 transitions.
[2023-11-29 02:48:49,316 INFO  L78                 Accepts]: Start accepts. Automaton has 5083 states and 8477 transitions. Word has length 3125
[2023-11-29 02:48:49,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:49,318 INFO  L495      AbstractCegarLoop]: Abstraction has 5083 states and 8477 transitions.
[2023-11-29 02:48:49,318 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 361.5) internal successors, (2892), 8 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:49,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 5083 states and 8477 transitions.
[2023-11-29 02:48:49,359 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3127
[2023-11-29 02:48:49,360 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:49,360 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:49,391 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0
[2023-11-29 02:48:49,561 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-29 02:48:49,561 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:49,561 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:49,562 INFO  L85        PathProgramCache]: Analyzing trace with hash 1274914277, now seen corresponding path program 1 times
[2023-11-29 02:48:49,562 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:49,562 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873711139]
[2023-11-29 02:48:49,563 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:49,563 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:49,763 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:49,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867314330]
[2023-11-29 02:48:49,764 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:49,764 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:49,764 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:49,765 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:49,765 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2023-11-29 02:48:52,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:52,514 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12676 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:52,542 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:52,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked.
[2023-11-29 02:48:52,690 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:52,690 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:52,690 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873711139]
[2023-11-29 02:48:52,691 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:52,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867314330]
[2023-11-29 02:48:52,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [867314330] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:52,691 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:52,692 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:52,692 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201627614]
[2023-11-29 02:48:52,692 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:52,694 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:52,694 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:52,696 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:52,696 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:52,696 INFO  L87              Difference]: Start difference. First operand 5083 states and 8477 transitions. Second operand  has 7 states, 7 states have (on average 413.85714285714283) internal successors, (2897), 7 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:53,022 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:53,022 INFO  L93              Difference]: Finished difference Result 14147 states and 23596 transitions.
[2023-11-29 02:48:53,022 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:53,023 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 413.85714285714283) internal successors, (2897), 7 states have internal predecessors, (2897), 0 states have call successors, (0), 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 3126
[2023-11-29 02:48:53,026 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:53,033 INFO  L225             Difference]: With dead ends: 14147
[2023-11-29 02:48:53,034 INFO  L226             Difference]: Without dead ends: 9547
[2023-11-29 02:48:53,038 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3135 GetRequests, 3123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:53,038 INFO  L413           NwaCegarLoop]: 8272 mSDtfsCounter, 21876 mSDsluCounter, 32497 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21876 SdHoareTripleChecker+Valid, 40769 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:53,038 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21876 Valid, 40769 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:48:53,046 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9547 states.
[2023-11-29 02:48:53,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 5088.
[2023-11-29 02:48:53,097 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5088 states, 5087 states have (on average 1.6677806172596816) internal successors, (8484), 5087 states have internal predecessors, (8484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:53,103 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 8484 transitions.
[2023-11-29 02:48:53,103 INFO  L78                 Accepts]: Start accepts. Automaton has 5088 states and 8484 transitions. Word has length 3126
[2023-11-29 02:48:53,104 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:53,104 INFO  L495      AbstractCegarLoop]: Abstraction has 5088 states and 8484 transitions.
[2023-11-29 02:48:53,105 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 413.85714285714283) internal successors, (2897), 7 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:53,105 INFO  L276                IsEmpty]: Start isEmpty. Operand 5088 states and 8484 transitions.
[2023-11-29 02:48:53,149 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3128
[2023-11-29 02:48:53,149 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:53,150 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:53,182 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0
[2023-11-29 02:48:53,350 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2023-11-29 02:48:53,350 INFO  L420      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:53,350 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:53,351 INFO  L85        PathProgramCache]: Analyzing trace with hash -2058911169, now seen corresponding path program 1 times
[2023-11-29 02:48:53,351 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:53,351 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889239550]
[2023-11-29 02:48:53,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:53,351 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:53,554 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:53,554 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073663093]
[2023-11-29 02:48:53,554 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:53,555 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:53,555 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:53,555 INFO  L229       MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:53,556 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process
[2023-11-29 02:48:56,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:56,246 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12679 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:56,279 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:48:56,432 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked.
[2023-11-29 02:48:56,432 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:48:56,432 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:48:56,432 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889239550]
[2023-11-29 02:48:56,433 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:48:56,433 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073663093]
[2023-11-29 02:48:56,433 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073663093] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:48:56,433 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:48:56,434 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:48:56,434 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240050963]
[2023-11-29 02:48:56,434 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:48:56,436 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:48:56,436 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:48:56,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:48:56,437 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:48:56,438 INFO  L87              Difference]: Start difference. First operand 5088 states and 8484 transitions. Second operand  has 7 states, 7 states have (on average 414.2857142857143) internal successors, (2900), 7 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:56,733 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:48:56,733 INFO  L93              Difference]: Finished difference Result 14159 states and 23612 transitions.
[2023-11-29 02:48:56,733 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:48:56,734 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 414.2857142857143) internal successors, (2900), 7 states have internal predecessors, (2900), 0 states have call successors, (0), 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 3127
[2023-11-29 02:48:56,736 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:48:56,742 INFO  L225             Difference]: With dead ends: 14159
[2023-11-29 02:48:56,742 INFO  L226             Difference]: Without dead ends: 9548
[2023-11-29 02:48:56,745 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3136 GetRequests, 3124 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:48:56,746 INFO  L413           NwaCegarLoop]: 8267 mSDtfsCounter, 21877 mSDsluCounter, 32482 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21877 SdHoareTripleChecker+Valid, 40749 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:48:56,746 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21877 Valid, 40749 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:48:56,752 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9548 states.
[2023-11-29 02:48:56,789 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9548 to 5090.
[2023-11-29 02:48:56,793 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5090 states, 5089 states have (on average 1.6675181764590292) internal successors, (8486), 5089 states have internal predecessors, (8486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:56,797 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 8486 transitions.
[2023-11-29 02:48:56,798 INFO  L78                 Accepts]: Start accepts. Automaton has 5090 states and 8486 transitions. Word has length 3127
[2023-11-29 02:48:56,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:48:56,799 INFO  L495      AbstractCegarLoop]: Abstraction has 5090 states and 8486 transitions.
[2023-11-29 02:48:56,799 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 414.2857142857143) internal successors, (2900), 7 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:48:56,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 5090 states and 8486 transitions.
[2023-11-29 02:48:56,840 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3129
[2023-11-29 02:48:56,841 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:48:56,841 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:48:56,875 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0
[2023-11-29 02:48:57,042 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39
[2023-11-29 02:48:57,042 INFO  L420      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:48:57,042 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:48:57,042 INFO  L85        PathProgramCache]: Analyzing trace with hash -646836727, now seen corresponding path program 1 times
[2023-11-29 02:48:57,043 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:48:57,043 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385862357]
[2023-11-29 02:48:57,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:57,043 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:48:57,270 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:48:57,270 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344522690]
[2023-11-29 02:48:57,271 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:48:57,271 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:48:57,271 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:48:57,271 INFO  L229       MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:48:57,272 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process
[2023-11-29 02:48:59,845 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:48:59,921 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12683 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:48:59,952 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:00,088 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2023-11-29 02:49:00,089 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:00,089 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:00,089 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385862357]
[2023-11-29 02:49:00,089 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:00,089 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344522690]
[2023-11-29 02:49:00,089 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344522690] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:00,089 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:00,090 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:00,090 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434933054]
[2023-11-29 02:49:00,090 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:00,092 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:00,092 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:00,094 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:00,094 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:00,095 INFO  L87              Difference]: Start difference. First operand 5090 states and 8486 transitions. Second operand  has 7 states, 7 states have (on average 415.0) internal successors, (2905), 7 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:00,404 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:00,405 INFO  L93              Difference]: Finished difference Result 14168 states and 23623 transitions.
[2023-11-29 02:49:00,405 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:00,406 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 415.0) internal successors, (2905), 7 states have internal predecessors, (2905), 0 states have call successors, (0), 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 3128
[2023-11-29 02:49:00,408 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:00,414 INFO  L225             Difference]: With dead ends: 14168
[2023-11-29 02:49:00,414 INFO  L226             Difference]: Without dead ends: 9552
[2023-11-29 02:49:00,418 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3137 GetRequests, 3125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:00,419 INFO  L413           NwaCegarLoop]: 8257 mSDtfsCounter, 21879 mSDsluCounter, 32452 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21879 SdHoareTripleChecker+Valid, 40709 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:00,419 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21879 Valid, 40709 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:00,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9552 states.
[2023-11-29 02:49:00,469 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9552 to 5095.
[2023-11-29 02:49:00,473 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5095 states, 5094 states have (on average 1.6672555948174324) internal successors, (8493), 5094 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:00,478 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 8493 transitions.
[2023-11-29 02:49:00,478 INFO  L78                 Accepts]: Start accepts. Automaton has 5095 states and 8493 transitions. Word has length 3128
[2023-11-29 02:49:00,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:00,479 INFO  L495      AbstractCegarLoop]: Abstraction has 5095 states and 8493 transitions.
[2023-11-29 02:49:00,480 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 415.0) internal successors, (2905), 7 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:00,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 5095 states and 8493 transitions.
[2023-11-29 02:49:00,521 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3130
[2023-11-29 02:49:00,521 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:00,522 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:00,552 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0
[2023-11-29 02:49:00,722 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:00,723 INFO  L420      AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:00,723 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:00,723 INFO  L85        PathProgramCache]: Analyzing trace with hash -301425871, now seen corresponding path program 1 times
[2023-11-29 02:49:00,723 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:00,724 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825470168]
[2023-11-29 02:49:00,724 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:00,724 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:00,950 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:00,950 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943872823]
[2023-11-29 02:49:00,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:00,951 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:00,951 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:00,952 INFO  L229       MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:00,953 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process
[2023-11-29 02:49:03,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:03,700 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12686 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:03,729 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:03,870 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2023-11-29 02:49:03,870 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:03,870 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:03,871 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825470168]
[2023-11-29 02:49:03,871 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:03,871 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943872823]
[2023-11-29 02:49:03,871 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943872823] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:03,871 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:03,872 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:03,872 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995257573]
[2023-11-29 02:49:03,872 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:03,874 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:03,874 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:03,875 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:03,876 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:03,876 INFO  L87              Difference]: Start difference. First operand 5095 states and 8493 transitions. Second operand  has 7 states, 7 states have (on average 415.7142857142857) internal successors, (2910), 7 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:04,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:04,184 INFO  L93              Difference]: Finished difference Result 14183 states and 23644 transitions.
[2023-11-29 02:49:04,184 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:04,185 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 415.7142857142857) internal successors, (2910), 7 states have internal predecessors, (2910), 0 states have call successors, (0), 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 3129
[2023-11-29 02:49:04,187 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:04,193 INFO  L225             Difference]: With dead ends: 14183
[2023-11-29 02:49:04,193 INFO  L226             Difference]: Without dead ends: 9556
[2023-11-29 02:49:04,196 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3138 GetRequests, 3126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:04,197 INFO  L413           NwaCegarLoop]: 8247 mSDtfsCounter, 21883 mSDsluCounter, 32422 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21883 SdHoareTripleChecker+Valid, 40669 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:04,197 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21883 Valid, 40669 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:04,203 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9556 states.
[2023-11-29 02:49:04,241 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 5100.
[2023-11-29 02:49:04,245 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5100 states, 5099 states have (on average 1.666993528142773) internal successors, (8500), 5099 states have internal predecessors, (8500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:04,250 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 8500 transitions.
[2023-11-29 02:49:04,250 INFO  L78                 Accepts]: Start accepts. Automaton has 5100 states and 8500 transitions. Word has length 3129
[2023-11-29 02:49:04,251 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:04,251 INFO  L495      AbstractCegarLoop]: Abstraction has 5100 states and 8500 transitions.
[2023-11-29 02:49:04,252 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 415.7142857142857) internal successors, (2910), 7 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:04,252 INFO  L276                IsEmpty]: Start isEmpty. Operand 5100 states and 8500 transitions.
[2023-11-29 02:49:04,293 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3131
[2023-11-29 02:49:04,293 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:04,294 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:04,326 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0
[2023-11-29 02:49:04,494 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41
[2023-11-29 02:49:04,494 INFO  L420      AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:04,494 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:04,495 INFO  L85        PathProgramCache]: Analyzing trace with hash -744337901, now seen corresponding path program 1 times
[2023-11-29 02:49:04,495 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:04,495 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866428669]
[2023-11-29 02:49:04,495 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:04,495 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:04,717 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:04,717 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545208400]
[2023-11-29 02:49:04,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:04,718 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:04,718 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:04,719 INFO  L229       MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:04,720 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process
[2023-11-29 02:49:07,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:07,504 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12690 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:07,536 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:07,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked.
[2023-11-29 02:49:07,673 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:07,673 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:07,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866428669]
[2023-11-29 02:49:07,673 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:07,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545208400]
[2023-11-29 02:49:07,673 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545208400] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:07,674 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:07,674 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:07,674 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254638921]
[2023-11-29 02:49:07,674 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:07,676 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:07,676 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:07,678 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:07,678 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:07,679 INFO  L87              Difference]: Start difference. First operand 5100 states and 8500 transitions. Second operand  has 7 states, 7 states have (on average 416.14285714285717) internal successors, (2913), 7 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:07,974 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:07,974 INFO  L93              Difference]: Finished difference Result 14195 states and 23660 transitions.
[2023-11-29 02:49:07,974 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:07,975 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 416.14285714285717) internal successors, (2913), 7 states have internal predecessors, (2913), 0 states have call successors, (0), 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 3130
[2023-11-29 02:49:07,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:07,983 INFO  L225             Difference]: With dead ends: 14195
[2023-11-29 02:49:07,983 INFO  L226             Difference]: Without dead ends: 9557
[2023-11-29 02:49:07,987 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3139 GetRequests, 3127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:07,987 INFO  L413           NwaCegarLoop]: 8242 mSDtfsCounter, 21884 mSDsluCounter, 32407 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21884 SdHoareTripleChecker+Valid, 40649 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:07,988 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21884 Valid, 40649 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:49:07,996 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9557 states.
[2023-11-29 02:49:08,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 5102.
[2023-11-29 02:49:08,040 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5102 states, 5101 states have (on average 1.6667320133307195) internal successors, (8502), 5101 states have internal predecessors, (8502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:08,045 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 8502 transitions.
[2023-11-29 02:49:08,045 INFO  L78                 Accepts]: Start accepts. Automaton has 5102 states and 8502 transitions. Word has length 3130
[2023-11-29 02:49:08,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:08,047 INFO  L495      AbstractCegarLoop]: Abstraction has 5102 states and 8502 transitions.
[2023-11-29 02:49:08,047 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 416.14285714285717) internal successors, (2913), 7 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:08,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 5102 states and 8502 transitions.
[2023-11-29 02:49:08,088 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3132
[2023-11-29 02:49:08,089 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:08,089 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:08,119 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0
[2023-11-29 02:49:08,290 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:08,290 INFO  L420      AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:08,290 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:08,290 INFO  L85        PathProgramCache]: Analyzing trace with hash 1126654601, now seen corresponding path program 1 times
[2023-11-29 02:49:08,290 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:08,291 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40254531]
[2023-11-29 02:49:08,291 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:08,291 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:08,494 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:08,494 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746241507]
[2023-11-29 02:49:08,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:08,494 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:08,495 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:08,495 INFO  L229       MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:08,496 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process
[2023-11-29 02:49:11,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:11,202 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12693 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:11,231 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:11,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked.
[2023-11-29 02:49:11,364 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:11,364 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:11,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40254531]
[2023-11-29 02:49:11,365 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:11,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746241507]
[2023-11-29 02:49:11,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746241507] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:11,365 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:11,366 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:11,366 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194127222]
[2023-11-29 02:49:11,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:11,368 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:11,368 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:11,370 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:11,370 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:11,371 INFO  L87              Difference]: Start difference. First operand 5102 states and 8502 transitions. Second operand  has 7 states, 7 states have (on average 416.85714285714283) internal successors, (2918), 7 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:11,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:11,674 INFO  L93              Difference]: Finished difference Result 14204 states and 23671 transitions.
[2023-11-29 02:49:11,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:11,675 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 416.85714285714283) internal successors, (2918), 7 states have internal predecessors, (2918), 0 states have call successors, (0), 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 3131
[2023-11-29 02:49:11,677 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:11,683 INFO  L225             Difference]: With dead ends: 14204
[2023-11-29 02:49:11,683 INFO  L226             Difference]: Without dead ends: 9561
[2023-11-29 02:49:11,686 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3140 GetRequests, 3128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:11,686 INFO  L413           NwaCegarLoop]: 8232 mSDtfsCounter, 21886 mSDsluCounter, 32377 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21886 SdHoareTripleChecker+Valid, 40609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:11,687 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21886 Valid, 40609 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:11,693 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9561 states.
[2023-11-29 02:49:11,735 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 5107.
[2023-11-29 02:49:11,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5107 states, 5106 states have (on average 1.6664708186447317) internal successors, (8509), 5106 states have internal predecessors, (8509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:11,744 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 8509 transitions.
[2023-11-29 02:49:11,745 INFO  L78                 Accepts]: Start accepts. Automaton has 5107 states and 8509 transitions. Word has length 3131
[2023-11-29 02:49:11,746 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:11,746 INFO  L495      AbstractCegarLoop]: Abstraction has 5107 states and 8509 transitions.
[2023-11-29 02:49:11,747 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 416.85714285714283) internal successors, (2918), 7 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:11,747 INFO  L276                IsEmpty]: Start isEmpty. Operand 5107 states and 8509 transitions.
[2023-11-29 02:49:11,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3133
[2023-11-29 02:49:11,789 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:11,790 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:11,820 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0
[2023-11-29 02:49:11,990 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:11,990 INFO  L420      AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:11,991 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:11,991 INFO  L85        PathProgramCache]: Analyzing trace with hash -1725549153, now seen corresponding path program 1 times
[2023-11-29 02:49:11,991 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:11,991 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709920238]
[2023-11-29 02:49:11,991 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:11,992 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:12,186 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:12,186 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399850139]
[2023-11-29 02:49:12,187 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:12,187 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:12,187 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:12,188 INFO  L229       MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:12,188 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process
[2023-11-29 02:49:14,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:14,843 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12696 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:14,873 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:15,022 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2023-11-29 02:49:15,022 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:15,022 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:15,022 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709920238]
[2023-11-29 02:49:15,022 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:15,022 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399850139]
[2023-11-29 02:49:15,022 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399850139] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:15,022 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:15,023 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:15,023 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132566675]
[2023-11-29 02:49:15,023 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:15,025 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:15,025 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:15,026 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:15,027 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:15,027 INFO  L87              Difference]: Start difference. First operand 5107 states and 8509 transitions. Second operand  has 7 states, 7 states have (on average 417.57142857142856) internal successors, (2923), 7 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:15,339 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:15,339 INFO  L93              Difference]: Finished difference Result 14219 states and 23692 transitions.
[2023-11-29 02:49:15,339 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:15,340 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 417.57142857142856) internal successors, (2923), 7 states have internal predecessors, (2923), 0 states have call successors, (0), 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 3132
[2023-11-29 02:49:15,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:15,348 INFO  L225             Difference]: With dead ends: 14219
[2023-11-29 02:49:15,348 INFO  L226             Difference]: Without dead ends: 9565
[2023-11-29 02:49:15,351 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3141 GetRequests, 3129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:15,352 INFO  L413           NwaCegarLoop]: 8222 mSDtfsCounter, 21890 mSDsluCounter, 32347 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21890 SdHoareTripleChecker+Valid, 40569 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:15,352 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21890 Valid, 40569 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:15,358 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9565 states.
[2023-11-29 02:49:15,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9565 to 5112.
[2023-11-29 02:49:15,400 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5112 states, 5111 states have (on average 1.6662101350029348) internal successors, (8516), 5111 states have internal predecessors, (8516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:15,404 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 8516 transitions.
[2023-11-29 02:49:15,404 INFO  L78                 Accepts]: Start accepts. Automaton has 5112 states and 8516 transitions. Word has length 3132
[2023-11-29 02:49:15,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:15,406 INFO  L495      AbstractCegarLoop]: Abstraction has 5112 states and 8516 transitions.
[2023-11-29 02:49:15,406 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 417.57142857142856) internal successors, (2923), 7 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:15,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 5112 states and 8516 transitions.
[2023-11-29 02:49:15,478 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3134
[2023-11-29 02:49:15,478 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:15,479 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:15,512 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0
[2023-11-29 02:49:15,679 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:15,679 INFO  L420      AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:15,680 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:15,681 INFO  L85        PathProgramCache]: Analyzing trace with hash -1722545155, now seen corresponding path program 1 times
[2023-11-29 02:49:15,681 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:15,681 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651617437]
[2023-11-29 02:49:15,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:15,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:15,885 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:15,885 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787520740]
[2023-11-29 02:49:15,886 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:15,886 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:15,886 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:15,887 INFO  L229       MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:15,888 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process
[2023-11-29 02:49:18,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:18,469 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12699 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:18,502 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:18,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked.
[2023-11-29 02:49:18,653 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:18,653 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:18,653 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651617437]
[2023-11-29 02:49:18,653 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:18,653 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787520740]
[2023-11-29 02:49:18,653 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787520740] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:18,653 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:18,654 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:18,654 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506067246]
[2023-11-29 02:49:18,654 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:18,656 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:18,656 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:18,658 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:18,658 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:18,658 INFO  L87              Difference]: Start difference. First operand 5112 states and 8516 transitions. Second operand  has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:18,971 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:18,971 INFO  L93              Difference]: Finished difference Result 14231 states and 23708 transitions.
[2023-11-29 02:49:18,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:18,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 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 3133
[2023-11-29 02:49:18,975 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:18,981 INFO  L225             Difference]: With dead ends: 14231
[2023-11-29 02:49:18,982 INFO  L226             Difference]: Without dead ends: 9566
[2023-11-29 02:49:18,985 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3142 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:18,986 INFO  L413           NwaCegarLoop]: 8217 mSDtfsCounter, 21891 mSDsluCounter, 32332 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21891 SdHoareTripleChecker+Valid, 40549 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:18,986 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21891 Valid, 40549 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:18,993 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9566 states.
[2023-11-29 02:49:19,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9566 to 5114.
[2023-11-29 02:49:19,036 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5114 states, 5113 states have (on average 1.6659495403872482) internal successors, (8518), 5113 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:19,043 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 8518 transitions.
[2023-11-29 02:49:19,043 INFO  L78                 Accepts]: Start accepts. Automaton has 5114 states and 8518 transitions. Word has length 3133
[2023-11-29 02:49:19,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:19,045 INFO  L495      AbstractCegarLoop]: Abstraction has 5114 states and 8518 transitions.
[2023-11-29 02:49:19,045 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:19,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 5114 states and 8518 transitions.
[2023-11-29 02:49:19,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3135
[2023-11-29 02:49:19,087 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:19,087 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:19,117 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0
[2023-11-29 02:49:19,288 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:19,288 INFO  L420      AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:19,288 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:19,289 INFO  L85        PathProgramCache]: Analyzing trace with hash -1999089915, now seen corresponding path program 1 times
[2023-11-29 02:49:19,289 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:19,289 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120247435]
[2023-11-29 02:49:19,289 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:19,289 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:19,491 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:19,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431175593]
[2023-11-29 02:49:19,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:19,492 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:19,492 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:19,493 INFO  L229       MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:19,494 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process
[2023-11-29 02:49:22,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:22,166 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12702 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:22,199 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:22,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked.
[2023-11-29 02:49:22,350 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:22,350 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:22,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120247435]
[2023-11-29 02:49:22,350 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:22,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431175593]
[2023-11-29 02:49:22,350 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [431175593] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:22,350 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:22,351 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:22,352 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277718529]
[2023-11-29 02:49:22,352 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:22,353 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:22,353 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:22,355 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:22,355 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:22,356 INFO  L87              Difference]: Start difference. First operand 5114 states and 8518 transitions. Second operand  has 7 states, 7 states have (on average 418.7142857142857) internal successors, (2931), 7 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:22,678 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:22,678 INFO  L93              Difference]: Finished difference Result 14240 states and 23719 transitions.
[2023-11-29 02:49:22,678 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:22,679 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 418.7142857142857) internal successors, (2931), 7 states have internal predecessors, (2931), 0 states have call successors, (0), 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 3134
[2023-11-29 02:49:22,681 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:22,688 INFO  L225             Difference]: With dead ends: 14240
[2023-11-29 02:49:22,688 INFO  L226             Difference]: Without dead ends: 9570
[2023-11-29 02:49:22,692 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:22,692 INFO  L413           NwaCegarLoop]: 8207 mSDtfsCounter, 21893 mSDsluCounter, 32302 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21893 SdHoareTripleChecker+Valid, 40509 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:22,692 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21893 Valid, 40509 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:22,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9570 states.
[2023-11-29 02:49:22,743 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 5119.
[2023-11-29 02:49:22,747 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5119 states, 5118 states have (on average 1.6656897225478702) internal successors, (8525), 5118 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:22,752 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 8525 transitions.
[2023-11-29 02:49:22,752 INFO  L78                 Accepts]: Start accepts. Automaton has 5119 states and 8525 transitions. Word has length 3134
[2023-11-29 02:49:22,753 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:22,753 INFO  L495      AbstractCegarLoop]: Abstraction has 5119 states and 8525 transitions.
[2023-11-29 02:49:22,754 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 418.7142857142857) internal successors, (2931), 7 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:22,754 INFO  L276                IsEmpty]: Start isEmpty. Operand 5119 states and 8525 transitions.
[2023-11-29 02:49:22,795 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3136
[2023-11-29 02:49:22,795 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:22,796 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:22,826 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0
[2023-11-29 02:49:22,996 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46
[2023-11-29 02:49:22,997 INFO  L420      AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:22,997 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:22,997 INFO  L85        PathProgramCache]: Analyzing trace with hash 1115028531, now seen corresponding path program 1 times
[2023-11-29 02:49:22,997 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:22,997 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001143963]
[2023-11-29 02:49:22,998 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:22,998 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:23,198 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:23,199 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890707131]
[2023-11-29 02:49:23,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:23,200 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:23,200 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:23,201 INFO  L229       MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:23,201 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process
[2023-11-29 02:49:25,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:25,911 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12706 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:25,939 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:26,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked.
[2023-11-29 02:49:26,077 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:26,077 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:26,077 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001143963]
[2023-11-29 02:49:26,077 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:26,077 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890707131]
[2023-11-29 02:49:26,077 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [890707131] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:26,077 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:26,078 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:26,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789118302]
[2023-11-29 02:49:26,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:26,080 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:26,080 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:26,081 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:26,081 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:26,082 INFO  L87              Difference]: Start difference. First operand 5119 states and 8525 transitions. Second operand  has 7 states, 7 states have (on average 419.42857142857144) internal successors, (2936), 7 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:26,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:26,395 INFO  L93              Difference]: Finished difference Result 14255 states and 23740 transitions.
[2023-11-29 02:49:26,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:26,396 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 419.42857142857144) internal successors, (2936), 7 states have internal predecessors, (2936), 0 states have call successors, (0), 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 3135
[2023-11-29 02:49:26,399 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:26,405 INFO  L225             Difference]: With dead ends: 14255
[2023-11-29 02:49:26,405 INFO  L226             Difference]: Without dead ends: 9574
[2023-11-29 02:49:26,409 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3144 GetRequests, 3132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:26,409 INFO  L413           NwaCegarLoop]: 8197 mSDtfsCounter, 21897 mSDsluCounter, 32272 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21897 SdHoareTripleChecker+Valid, 40469 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:26,409 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21897 Valid, 40469 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:26,416 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9574 states.
[2023-11-29 02:49:26,455 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 5124.
[2023-11-29 02:49:26,459 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5124 states, 5123 states have (on average 1.665430411868046) internal successors, (8532), 5123 states have internal predecessors, (8532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:26,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8532 transitions.
[2023-11-29 02:49:26,464 INFO  L78                 Accepts]: Start accepts. Automaton has 5124 states and 8532 transitions. Word has length 3135
[2023-11-29 02:49:26,465 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:26,465 INFO  L495      AbstractCegarLoop]: Abstraction has 5124 states and 8532 transitions.
[2023-11-29 02:49:26,466 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 419.42857142857144) internal successors, (2936), 7 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:26,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 5124 states and 8532 transitions.
[2023-11-29 02:49:26,507 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3137
[2023-11-29 02:49:26,508 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:26,508 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:49:26,540 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0
[2023-11-29 02:49:26,709 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47
[2023-11-29 02:49:26,709 INFO  L420      AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:26,709 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:26,710 INFO  L85        PathProgramCache]: Analyzing trace with hash -730407213, now seen corresponding path program 1 times
[2023-11-29 02:49:26,710 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:26,710 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424102237]
[2023-11-29 02:49:26,711 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:26,711 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:26,905 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:26,905 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389292806]
[2023-11-29 02:49:26,906 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:26,906 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:26,906 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:26,907 INFO  L229       MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:26,908 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process
[2023-11-29 02:49:29,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:29,624 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12709 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:29,653 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:29,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked.
[2023-11-29 02:49:29,791 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:29,791 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:29,791 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424102237]
[2023-11-29 02:49:29,791 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:29,791 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389292806]
[2023-11-29 02:49:29,791 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389292806] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:29,791 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:29,792 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:29,792 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111233080]
[2023-11-29 02:49:29,792 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:29,793 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:29,793 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:29,795 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:29,795 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:29,795 INFO  L87              Difference]: Start difference. First operand 5124 states and 8532 transitions. Second operand  has 7 states, 7 states have (on average 419.85714285714283) internal successors, (2939), 7 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:30,112 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:30,112 INFO  L93              Difference]: Finished difference Result 14267 states and 23756 transitions.
[2023-11-29 02:49:30,112 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:30,113 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 419.85714285714283) internal successors, (2939), 7 states have internal predecessors, (2939), 0 states have call successors, (0), 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 3136
[2023-11-29 02:49:30,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:30,122 INFO  L225             Difference]: With dead ends: 14267
[2023-11-29 02:49:30,122 INFO  L226             Difference]: Without dead ends: 9575
[2023-11-29 02:49:30,125 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3145 GetRequests, 3133 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:30,126 INFO  L413           NwaCegarLoop]: 8192 mSDtfsCounter, 21898 mSDsluCounter, 32257 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21898 SdHoareTripleChecker+Valid, 40449 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:30,126 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21898 Valid, 40449 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:30,132 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9575 states.
[2023-11-29 02:49:30,175 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5126.
[2023-11-29 02:49:30,179 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5126 states, 5125 states have (on average 1.665170731707317) internal successors, (8534), 5125 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:30,185 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 8534 transitions.
[2023-11-29 02:49:30,185 INFO  L78                 Accepts]: Start accepts. Automaton has 5126 states and 8534 transitions. Word has length 3136
[2023-11-29 02:49:30,187 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:30,187 INFO  L495      AbstractCegarLoop]: Abstraction has 5126 states and 8534 transitions.
[2023-11-29 02:49:30,187 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 419.85714285714283) internal successors, (2939), 7 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:30,188 INFO  L276                IsEmpty]: Start isEmpty. Operand 5126 states and 8534 transitions.
[2023-11-29 02:49:30,231 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3138
[2023-11-29 02:49:30,231 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:30,232 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:30,261 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0
[2023-11-29 02:49:30,432 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:30,432 INFO  L420      AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:30,433 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:30,433 INFO  L85        PathProgramCache]: Analyzing trace with hash -311369651, now seen corresponding path program 1 times
[2023-11-29 02:49:30,433 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:30,433 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438423872]
[2023-11-29 02:49:30,433 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:30,434 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:30,628 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:30,629 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335759009]
[2023-11-29 02:49:30,629 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:30,629 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:30,629 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:30,630 INFO  L229       MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:30,631 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process
[2023-11-29 02:49:33,163 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:33,243 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12712 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:33,277 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:33,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked.
[2023-11-29 02:49:33,418 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:33,419 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:33,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438423872]
[2023-11-29 02:49:33,419 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:33,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335759009]
[2023-11-29 02:49:33,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [335759009] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:33,419 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:33,420 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:33,420 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46007682]
[2023-11-29 02:49:33,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:33,422 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:33,422 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:33,424 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:33,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:33,424 INFO  L87              Difference]: Start difference. First operand 5126 states and 8534 transitions. Second operand  has 7 states, 7 states have (on average 420.57142857142856) internal successors, (2944), 7 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:33,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:33,727 INFO  L93              Difference]: Finished difference Result 14276 states and 23767 transitions.
[2023-11-29 02:49:33,727 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:33,728 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 420.57142857142856) internal successors, (2944), 7 states have internal predecessors, (2944), 0 states have call successors, (0), 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 3137
[2023-11-29 02:49:33,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:33,736 INFO  L225             Difference]: With dead ends: 14276
[2023-11-29 02:49:33,736 INFO  L226             Difference]: Without dead ends: 9579
[2023-11-29 02:49:33,739 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3146 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:33,740 INFO  L413           NwaCegarLoop]: 8182 mSDtfsCounter, 21900 mSDsluCounter, 32227 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21900 SdHoareTripleChecker+Valid, 40409 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:33,740 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21900 Valid, 40409 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:33,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9579 states.
[2023-11-29 02:49:33,834 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 5131.
[2023-11-29 02:49:33,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5131 states, 5130 states have (on average 1.6649122807017545) internal successors, (8541), 5130 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:33,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 8541 transitions.
[2023-11-29 02:49:33,843 INFO  L78                 Accepts]: Start accepts. Automaton has 5131 states and 8541 transitions. Word has length 3137
[2023-11-29 02:49:33,844 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:33,844 INFO  L495      AbstractCegarLoop]: Abstraction has 5131 states and 8541 transitions.
[2023-11-29 02:49:33,845 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 420.57142857142856) internal successors, (2944), 7 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:33,845 INFO  L276                IsEmpty]: Start isEmpty. Operand 5131 states and 8541 transitions.
[2023-11-29 02:49:33,887 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3139
[2023-11-29 02:49:33,887 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:33,887 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:33,917 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0
[2023-11-29 02:49:34,088 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49
[2023-11-29 02:49:34,088 INFO  L420      AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:34,089 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:34,090 INFO  L85        PathProgramCache]: Analyzing trace with hash 196329439, now seen corresponding path program 1 times
[2023-11-29 02:49:34,090 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:34,090 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908062451]
[2023-11-29 02:49:34,091 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:34,091 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:34,297 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:34,297 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078913135]
[2023-11-29 02:49:34,298 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:34,298 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:34,298 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:34,299 INFO  L229       MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:34,300 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process
[2023-11-29 02:49:36,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:36,973 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12715 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:37,002 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:37,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked.
[2023-11-29 02:49:37,147 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:37,147 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:37,148 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908062451]
[2023-11-29 02:49:37,148 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:37,148 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078913135]
[2023-11-29 02:49:37,148 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078913135] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:37,148 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:37,149 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:37,149 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538338332]
[2023-11-29 02:49:37,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:37,151 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:37,151 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:37,152 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:37,152 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:37,153 INFO  L87              Difference]: Start difference. First operand 5131 states and 8541 transitions. Second operand  has 7 states, 7 states have (on average 421.2857142857143) internal successors, (2949), 7 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:37,459 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:37,460 INFO  L93              Difference]: Finished difference Result 14291 states and 23788 transitions.
[2023-11-29 02:49:37,460 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:37,461 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 421.2857142857143) internal successors, (2949), 7 states have internal predecessors, (2949), 0 states have call successors, (0), 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 3138
[2023-11-29 02:49:37,463 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:37,469 INFO  L225             Difference]: With dead ends: 14291
[2023-11-29 02:49:37,469 INFO  L226             Difference]: Without dead ends: 9583
[2023-11-29 02:49:37,473 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3147 GetRequests, 3135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:37,473 INFO  L413           NwaCegarLoop]: 8172 mSDtfsCounter, 21904 mSDsluCounter, 32197 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21904 SdHoareTripleChecker+Valid, 40369 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:37,473 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21904 Valid, 40369 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:37,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9583 states.
[2023-11-29 02:49:37,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9583 to 5136.
[2023-11-29 02:49:37,529 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5136 states, 5135 states have (on average 1.6646543330087633) internal successors, (8548), 5135 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:37,535 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 8548 transitions.
[2023-11-29 02:49:37,535 INFO  L78                 Accepts]: Start accepts. Automaton has 5136 states and 8548 transitions. Word has length 3138
[2023-11-29 02:49:37,537 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:37,537 INFO  L495      AbstractCegarLoop]: Abstraction has 5136 states and 8548 transitions.
[2023-11-29 02:49:37,537 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 421.2857142857143) internal successors, (2949), 7 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:37,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 5136 states and 8548 transitions.
[2023-11-29 02:49:37,580 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3140
[2023-11-29 02:49:37,580 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:37,581 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:37,613 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0
[2023-11-29 02:49:37,781 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:37,781 INFO  L420      AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:37,782 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:37,782 INFO  L85        PathProgramCache]: Analyzing trace with hash -1590468543, now seen corresponding path program 1 times
[2023-11-29 02:49:37,782 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:37,782 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847423292]
[2023-11-29 02:49:37,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:37,782 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:37,993 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:37,993 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995839136]
[2023-11-29 02:49:37,994 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:37,994 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:37,994 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:37,995 INFO  L229       MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:37,995 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process
[2023-11-29 02:49:40,607 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:40,671 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12718 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:40,700 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:40,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked.
[2023-11-29 02:49:40,843 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:40,843 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:40,843 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847423292]
[2023-11-29 02:49:40,843 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:40,843 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995839136]
[2023-11-29 02:49:40,843 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995839136] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:40,843 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:40,844 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:40,844 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300034621]
[2023-11-29 02:49:40,845 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:40,847 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:40,847 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:40,849 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:40,849 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:40,849 INFO  L87              Difference]: Start difference. First operand 5136 states and 8548 transitions. Second operand  has 7 states, 7 states have (on average 421.7142857142857) internal successors, (2952), 7 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:41,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:41,147 INFO  L93              Difference]: Finished difference Result 14303 states and 23804 transitions.
[2023-11-29 02:49:41,148 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:41,148 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 421.7142857142857) internal successors, (2952), 7 states have internal predecessors, (2952), 0 states have call successors, (0), 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 3139
[2023-11-29 02:49:41,150 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:41,157 INFO  L225             Difference]: With dead ends: 14303
[2023-11-29 02:49:41,157 INFO  L226             Difference]: Without dead ends: 9584
[2023-11-29 02:49:41,161 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3148 GetRequests, 3136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:41,161 INFO  L413           NwaCegarLoop]: 8167 mSDtfsCounter, 21905 mSDsluCounter, 32182 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21905 SdHoareTripleChecker+Valid, 40349 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:41,161 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21905 Valid, 40349 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:49:41,170 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9584 states.
[2023-11-29 02:49:41,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 5138.
[2023-11-29 02:49:41,212 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5138 states, 5137 states have (on average 1.6643955616118358) internal successors, (8550), 5137 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:41,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 8550 transitions.
[2023-11-29 02:49:41,217 INFO  L78                 Accepts]: Start accepts. Automaton has 5138 states and 8550 transitions. Word has length 3139
[2023-11-29 02:49:41,218 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:41,218 INFO  L495      AbstractCegarLoop]: Abstraction has 5138 states and 8550 transitions.
[2023-11-29 02:49:41,219 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 421.7142857142857) internal successors, (2952), 7 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:41,219 INFO  L276                IsEmpty]: Start isEmpty. Operand 5138 states and 8550 transitions.
[2023-11-29 02:49:41,260 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3141
[2023-11-29 02:49:41,260 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:41,261 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:41,291 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0
[2023-11-29 02:49:41,461 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:41,462 INFO  L420      AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:41,462 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:41,462 INFO  L85        PathProgramCache]: Analyzing trace with hash 749780739, now seen corresponding path program 1 times
[2023-11-29 02:49:41,462 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:41,463 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247266793]
[2023-11-29 02:49:41,463 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:41,463 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:41,661 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:41,661 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184891614]
[2023-11-29 02:49:41,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:41,662 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:41,662 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:41,662 INFO  L229       MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:41,663 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process
[2023-11-29 02:49:44,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:44,417 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12722 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:44,446 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:44,583 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked.
[2023-11-29 02:49:44,583 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:44,583 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:44,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247266793]
[2023-11-29 02:49:44,583 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:44,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184891614]
[2023-11-29 02:49:44,584 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [184891614] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:44,584 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:44,584 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:44,584 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748087922]
[2023-11-29 02:49:44,584 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:44,586 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:44,586 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:44,587 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:44,587 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:44,588 INFO  L87              Difference]: Start difference. First operand 5138 states and 8550 transitions. Second operand  has 7 states, 7 states have (on average 422.42857142857144) internal successors, (2957), 7 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:44,887 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:44,887 INFO  L93              Difference]: Finished difference Result 14312 states and 23815 transitions.
[2023-11-29 02:49:44,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:44,888 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 422.42857142857144) internal successors, (2957), 7 states have internal predecessors, (2957), 0 states have call successors, (0), 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 3140
[2023-11-29 02:49:44,890 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:44,897 INFO  L225             Difference]: With dead ends: 14312
[2023-11-29 02:49:44,897 INFO  L226             Difference]: Without dead ends: 9588
[2023-11-29 02:49:44,900 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3149 GetRequests, 3137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:44,900 INFO  L413           NwaCegarLoop]: 8157 mSDtfsCounter, 21907 mSDsluCounter, 32152 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21907 SdHoareTripleChecker+Valid, 40309 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:44,900 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21907 Valid, 40309 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:49:44,906 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9588 states.
[2023-11-29 02:49:44,944 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9588 to 5143.
[2023-11-29 02:49:44,948 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5143 states, 5142 states have (on average 1.664138467522365) internal successors, (8557), 5142 states have internal predecessors, (8557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:44,953 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 8557 transitions.
[2023-11-29 02:49:44,953 INFO  L78                 Accepts]: Start accepts. Automaton has 5143 states and 8557 transitions. Word has length 3140
[2023-11-29 02:49:44,954 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:44,954 INFO  L495      AbstractCegarLoop]: Abstraction has 5143 states and 8557 transitions.
[2023-11-29 02:49:44,955 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 422.42857142857144) internal successors, (2957), 7 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:44,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 5143 states and 8557 transitions.
[2023-11-29 02:49:44,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3142
[2023-11-29 02:49:44,996 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:44,997 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:49:45,027 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0
[2023-11-29 02:49:45,197 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:45,197 INFO  L420      AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:45,197 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:45,198 INFO  L85        PathProgramCache]: Analyzing trace with hash 299680563, now seen corresponding path program 1 times
[2023-11-29 02:49:45,198 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:45,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673503706]
[2023-11-29 02:49:45,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:45,198 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:45,405 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:45,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929833564]
[2023-11-29 02:49:45,406 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:45,406 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:45,406 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:45,407 INFO  L229       MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:45,408 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process
[2023-11-29 02:49:48,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:48,125 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12725 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:48,156 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:48,285 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2023-11-29 02:49:48,285 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:48,285 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:48,285 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673503706]
[2023-11-29 02:49:48,285 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:48,285 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929833564]
[2023-11-29 02:49:48,285 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929833564] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:48,285 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:48,286 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:48,286 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130097715]
[2023-11-29 02:49:48,286 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:48,287 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:48,287 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:48,289 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:48,289 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:48,289 INFO  L87              Difference]: Start difference. First operand 5143 states and 8557 transitions. Second operand  has 7 states, 7 states have (on average 423.14285714285717) internal successors, (2962), 7 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:48,602 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:48,602 INFO  L93              Difference]: Finished difference Result 14327 states and 23836 transitions.
[2023-11-29 02:49:48,602 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:48,603 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 423.14285714285717) internal successors, (2962), 7 states have internal predecessors, (2962), 0 states have call successors, (0), 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 3141
[2023-11-29 02:49:48,605 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:48,612 INFO  L225             Difference]: With dead ends: 14327
[2023-11-29 02:49:48,612 INFO  L226             Difference]: Without dead ends: 9592
[2023-11-29 02:49:48,616 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3150 GetRequests, 3138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:48,616 INFO  L413           NwaCegarLoop]: 8147 mSDtfsCounter, 21911 mSDsluCounter, 32122 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21911 SdHoareTripleChecker+Valid, 40269 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:48,617 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21911 Valid, 40269 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:48,624 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9592 states.
[2023-11-29 02:49:48,667 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 5148.
[2023-11-29 02:49:48,671 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5148 states, 5147 states have (on average 1.6638818729356908) internal successors, (8564), 5147 states have internal predecessors, (8564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:48,675 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 8564 transitions.
[2023-11-29 02:49:48,676 INFO  L78                 Accepts]: Start accepts. Automaton has 5148 states and 8564 transitions. Word has length 3141
[2023-11-29 02:49:48,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:48,677 INFO  L495      AbstractCegarLoop]: Abstraction has 5148 states and 8564 transitions.
[2023-11-29 02:49:48,678 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 423.14285714285717) internal successors, (2962), 7 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:48,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 5148 states and 8564 transitions.
[2023-11-29 02:49:48,719 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3143
[2023-11-29 02:49:48,719 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:48,720 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:48,750 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0
[2023-11-29 02:49:48,920 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53
[2023-11-29 02:49:48,920 INFO  L420      AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:48,921 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:48,921 INFO  L85        PathProgramCache]: Analyzing trace with hash -195866867, now seen corresponding path program 1 times
[2023-11-29 02:49:48,921 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:48,921 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155728679]
[2023-11-29 02:49:48,921 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:48,922 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:49,116 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:49,117 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837457198]
[2023-11-29 02:49:49,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:49,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:49,117 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:49,118 INFO  L229       MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:49,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process
[2023-11-29 02:49:51,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:51,734 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12729 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:51,763 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:51,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked.
[2023-11-29 02:49:51,895 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:51,895 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:51,895 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155728679]
[2023-11-29 02:49:51,896 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:51,896 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837457198]
[2023-11-29 02:49:51,896 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [837457198] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:51,896 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:51,897 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:51,897 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109035790]
[2023-11-29 02:49:51,897 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:51,899 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:51,899 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:51,900 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:51,901 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:51,901 INFO  L87              Difference]: Start difference. First operand 5148 states and 8564 transitions. Second operand  has 7 states, 7 states have (on average 423.57142857142856) internal successors, (2965), 7 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:52,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:52,246 INFO  L93              Difference]: Finished difference Result 14339 states and 23852 transitions.
[2023-11-29 02:49:52,246 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:52,246 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 423.57142857142856) internal successors, (2965), 7 states have internal predecessors, (2965), 0 states have call successors, (0), 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 3142
[2023-11-29 02:49:52,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:52,254 INFO  L225             Difference]: With dead ends: 14339
[2023-11-29 02:49:52,254 INFO  L226             Difference]: Without dead ends: 9593
[2023-11-29 02:49:52,257 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3151 GetRequests, 3139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:52,257 INFO  L413           NwaCegarLoop]: 8142 mSDtfsCounter, 21912 mSDsluCounter, 32107 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21912 SdHoareTripleChecker+Valid, 40249 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:52,257 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21912 Valid, 40249 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:52,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9593 states.
[2023-11-29 02:49:52,298 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9593 to 5150.
[2023-11-29 02:49:52,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5150 states, 5149 states have (on average 1.6636240046610993) internal successors, (8566), 5149 states have internal predecessors, (8566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:52,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5150 states to 5150 states and 8566 transitions.
[2023-11-29 02:49:52,307 INFO  L78                 Accepts]: Start accepts. Automaton has 5150 states and 8566 transitions. Word has length 3142
[2023-11-29 02:49:52,308 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:52,308 INFO  L495      AbstractCegarLoop]: Abstraction has 5150 states and 8566 transitions.
[2023-11-29 02:49:52,309 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 423.57142857142856) internal successors, (2965), 7 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:52,309 INFO  L276                IsEmpty]: Start isEmpty. Operand 5150 states and 8566 transitions.
[2023-11-29 02:49:52,350 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3144
[2023-11-29 02:49:52,350 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:52,351 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:49:52,383 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0
[2023-11-29 02:49:52,551 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54
[2023-11-29 02:49:52,551 INFO  L420      AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:52,552 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:52,552 INFO  L85        PathProgramCache]: Analyzing trace with hash 608685451, now seen corresponding path program 1 times
[2023-11-29 02:49:52,552 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:52,552 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115862972]
[2023-11-29 02:49:52,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:52,552 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:52,757 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:52,757 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582998124]
[2023-11-29 02:49:52,758 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:52,758 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:52,758 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:52,759 INFO  L229       MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:52,759 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process
[2023-11-29 02:49:55,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:55,416 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12732 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:55,444 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:55,581 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked.
[2023-11-29 02:49:55,582 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:55,582 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:55,582 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115862972]
[2023-11-29 02:49:55,582 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:55,582 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582998124]
[2023-11-29 02:49:55,582 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582998124] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:55,582 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:55,583 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:55,583 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445227195]
[2023-11-29 02:49:55,583 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:55,585 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:55,585 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:55,586 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:55,586 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:55,587 INFO  L87              Difference]: Start difference. First operand 5150 states and 8566 transitions. Second operand  has 7 states, 7 states have (on average 424.2857142857143) internal successors, (2970), 7 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:55,887 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:55,887 INFO  L93              Difference]: Finished difference Result 14348 states and 23863 transitions.
[2023-11-29 02:49:55,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:55,888 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.2857142857143) internal successors, (2970), 7 states have internal predecessors, (2970), 0 states have call successors, (0), 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 3143
[2023-11-29 02:49:55,890 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:55,896 INFO  L225             Difference]: With dead ends: 14348
[2023-11-29 02:49:55,896 INFO  L226             Difference]: Without dead ends: 9597
[2023-11-29 02:49:55,899 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3152 GetRequests, 3140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:55,900 INFO  L413           NwaCegarLoop]: 8132 mSDtfsCounter, 21914 mSDsluCounter, 32077 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21914 SdHoareTripleChecker+Valid, 40209 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:55,900 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21914 Valid, 40209 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:49:55,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9597 states.
[2023-11-29 02:49:55,946 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 5155.
[2023-11-29 02:49:55,950 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5155 states, 5154 states have (on average 1.6633682576639504) internal successors, (8573), 5154 states have internal predecessors, (8573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:55,954 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5155 states to 5155 states and 8573 transitions.
[2023-11-29 02:49:55,954 INFO  L78                 Accepts]: Start accepts. Automaton has 5155 states and 8573 transitions. Word has length 3143
[2023-11-29 02:49:55,956 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:55,956 INFO  L495      AbstractCegarLoop]: Abstraction has 5155 states and 8573 transitions.
[2023-11-29 02:49:55,956 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.2857142857143) internal successors, (2970), 7 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:55,956 INFO  L276                IsEmpty]: Start isEmpty. Operand 5155 states and 8573 transitions.
[2023-11-29 02:49:55,998 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3145
[2023-11-29 02:49:55,998 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:55,999 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:49:56,028 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0
[2023-11-29 02:49:56,199 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55
[2023-11-29 02:49:56,199 INFO  L420      AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:56,199 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:56,200 INFO  L85        PathProgramCache]: Analyzing trace with hash -2129794663, now seen corresponding path program 1 times
[2023-11-29 02:49:56,200 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:56,200 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614176438]
[2023-11-29 02:49:56,200 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:56,200 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:56,403 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:56,403 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556129639]
[2023-11-29 02:49:56,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:56,403 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:49:56,404 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:49:56,404 INFO  L229       MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:49:56,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process
[2023-11-29 02:49:58,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:49:58,989 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12735 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:49:59,017 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:49:59,164 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked.
[2023-11-29 02:49:59,164 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:49:59,164 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:49:59,164 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614176438]
[2023-11-29 02:49:59,164 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:49:59,164 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556129639]
[2023-11-29 02:49:59,164 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556129639] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:49:59,164 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:49:59,165 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:49:59,166 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098774329]
[2023-11-29 02:49:59,166 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:49:59,167 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:49:59,167 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:49:59,169 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:49:59,169 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:49:59,169 INFO  L87              Difference]: Start difference. First operand 5155 states and 8573 transitions. Second operand  has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:59,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:49:59,488 INFO  L93              Difference]: Finished difference Result 14363 states and 23884 transitions.
[2023-11-29 02:49:59,488 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:49:59,489 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 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 3144
[2023-11-29 02:49:59,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:49:59,497 INFO  L225             Difference]: With dead ends: 14363
[2023-11-29 02:49:59,497 INFO  L226             Difference]: Without dead ends: 9601
[2023-11-29 02:49:59,500 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3153 GetRequests, 3141 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:49:59,500 INFO  L413           NwaCegarLoop]: 8122 mSDtfsCounter, 21918 mSDsluCounter, 32047 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21918 SdHoareTripleChecker+Valid, 40169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:49:59,501 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21918 Valid, 40169 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:49:59,509 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9601 states.
[2023-11-29 02:49:59,549 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9601 to 5160.
[2023-11-29 02:49:59,552 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5160 states, 5159 states have (on average 1.6631130063965884) internal successors, (8580), 5159 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:59,557 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 8580 transitions.
[2023-11-29 02:49:59,557 INFO  L78                 Accepts]: Start accepts. Automaton has 5160 states and 8580 transitions. Word has length 3144
[2023-11-29 02:49:59,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:49:59,559 INFO  L495      AbstractCegarLoop]: Abstraction has 5160 states and 8580 transitions.
[2023-11-29 02:49:59,559 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:49:59,559 INFO  L276                IsEmpty]: Start isEmpty. Operand 5160 states and 8580 transitions.
[2023-11-29 02:49:59,601 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3146
[2023-11-29 02:49:59,601 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:49:59,602 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:49:59,634 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0
[2023-11-29 02:49:59,802 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56
[2023-11-29 02:49:59,803 INFO  L420      AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:49:59,803 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:49:59,803 INFO  L85        PathProgramCache]: Analyzing trace with hash -2010422273, now seen corresponding path program 1 times
[2023-11-29 02:49:59,803 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:49:59,803 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599475976]
[2023-11-29 02:49:59,804 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:49:59,804 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:49:59,999 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:49:59,999 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372859584]
[2023-11-29 02:50:00,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:00,000 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:00,000 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:00,001 INFO  L229       MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:00,002 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process
[2023-11-29 02:50:02,622 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:02,686 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12738 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:02,716 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:02,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked.
[2023-11-29 02:50:02,854 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:02,854 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:02,854 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599475976]
[2023-11-29 02:50:02,854 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:02,854 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372859584]
[2023-11-29 02:50:02,854 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372859584] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:02,854 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:02,855 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:02,855 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091771898]
[2023-11-29 02:50:02,855 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:02,857 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:02,857 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:02,859 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:02,859 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:02,859 INFO  L87              Difference]: Start difference. First operand 5160 states and 8580 transitions. Second operand  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:03,172 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:03,172 INFO  L93              Difference]: Finished difference Result 14375 states and 23900 transitions.
[2023-11-29 02:50:03,173 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:50:03,173 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 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 3145
[2023-11-29 02:50:03,176 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:03,182 INFO  L225             Difference]: With dead ends: 14375
[2023-11-29 02:50:03,182 INFO  L226             Difference]: Without dead ends: 9602
[2023-11-29 02:50:03,185 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3154 GetRequests, 3142 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:03,185 INFO  L413           NwaCegarLoop]: 8117 mSDtfsCounter, 21919 mSDsluCounter, 32032 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21919 SdHoareTripleChecker+Valid, 40149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:03,185 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21919 Valid, 40149 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:03,191 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9602 states.
[2023-11-29 02:50:03,230 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 5162.
[2023-11-29 02:50:03,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5162 states, 5161 states have (on average 1.6628560356520055) internal successors, (8582), 5161 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:03,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 8582 transitions.
[2023-11-29 02:50:03,238 INFO  L78                 Accepts]: Start accepts. Automaton has 5162 states and 8582 transitions. Word has length 3145
[2023-11-29 02:50:03,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:03,240 INFO  L495      AbstractCegarLoop]: Abstraction has 5162 states and 8582 transitions.
[2023-11-29 02:50:03,240 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:03,240 INFO  L276                IsEmpty]: Start isEmpty. Operand 5162 states and 8582 transitions.
[2023-11-29 02:50:03,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3147
[2023-11-29 02:50:03,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:03,283 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:03,312 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0
[2023-11-29 02:50:03,483 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57
[2023-11-29 02:50:03,483 INFO  L420      AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:03,484 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:03,484 INFO  L85        PathProgramCache]: Analyzing trace with hash 1286020351, now seen corresponding path program 1 times
[2023-11-29 02:50:03,484 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:03,484 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716302212]
[2023-11-29 02:50:03,484 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:03,484 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:03,679 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:03,679 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297907740]
[2023-11-29 02:50:03,680 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:03,680 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:03,680 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:03,681 INFO  L229       MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:03,681 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process
[2023-11-29 02:50:06,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:06,431 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12741 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:06,460 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:06,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked.
[2023-11-29 02:50:06,596 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:06,596 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:06,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716302212]
[2023-11-29 02:50:06,597 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:06,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297907740]
[2023-11-29 02:50:06,597 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [297907740] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:06,597 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:06,598 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:06,598 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431760582]
[2023-11-29 02:50:06,598 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:06,600 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:06,600 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:06,601 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:06,601 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:06,602 INFO  L87              Difference]: Start difference. First operand 5162 states and 8582 transitions. Second operand  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:06,907 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:06,907 INFO  L93              Difference]: Finished difference Result 14384 states and 23911 transitions.
[2023-11-29 02:50:06,907 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:50:06,908 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 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 3146
[2023-11-29 02:50:06,910 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:06,916 INFO  L225             Difference]: With dead ends: 14384
[2023-11-29 02:50:06,916 INFO  L226             Difference]: Without dead ends: 9606
[2023-11-29 02:50:06,919 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3155 GetRequests, 3143 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:06,920 INFO  L413           NwaCegarLoop]: 8107 mSDtfsCounter, 21921 mSDsluCounter, 32002 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21921 SdHoareTripleChecker+Valid, 40109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:06,920 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21921 Valid, 40109 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:06,928 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9606 states.
[2023-11-29 02:50:06,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9606 to 5167.
[2023-11-29 02:50:06,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5167 states, 5166 states have (on average 1.6626016260162602) internal successors, (8589), 5166 states have internal predecessors, (8589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:06,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 8589 transitions.
[2023-11-29 02:50:06,976 INFO  L78                 Accepts]: Start accepts. Automaton has 5167 states and 8589 transitions. Word has length 3146
[2023-11-29 02:50:06,977 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:06,977 INFO  L495      AbstractCegarLoop]: Abstraction has 5167 states and 8589 transitions.
[2023-11-29 02:50:06,978 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:06,978 INFO  L276                IsEmpty]: Start isEmpty. Operand 5167 states and 8589 transitions.
[2023-11-29 02:50:07,019 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3148
[2023-11-29 02:50:07,020 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:07,020 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:07,052 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0
[2023-11-29 02:50:07,221 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58
[2023-11-29 02:50:07,221 INFO  L420      AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:07,221 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:07,222 INFO  L85        PathProgramCache]: Analyzing trace with hash 2034500661, now seen corresponding path program 1 times
[2023-11-29 02:50:07,222 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:07,222 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189755912]
[2023-11-29 02:50:07,223 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:07,223 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:07,422 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:07,422 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809672369]
[2023-11-29 02:50:07,423 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:07,423 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:07,423 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:07,424 INFO  L229       MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:07,425 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process
[2023-11-29 02:50:09,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:10,025 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12745 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:10,053 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:10,189 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked.
[2023-11-29 02:50:10,189 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:10,189 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:10,189 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189755912]
[2023-11-29 02:50:10,189 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:10,189 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809672369]
[2023-11-29 02:50:10,189 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [809672369] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:10,190 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:10,191 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:10,191 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423610884]
[2023-11-29 02:50:10,191 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:10,193 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:10,193 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:10,194 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:10,194 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:10,195 INFO  L87              Difference]: Start difference. First operand 5167 states and 8589 transitions. Second operand  has 7 states, 7 states have (on average 426.85714285714283) internal successors, (2988), 7 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:10,524 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:10,524 INFO  L93              Difference]: Finished difference Result 14399 states and 23932 transitions.
[2023-11-29 02:50:10,525 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:50:10,525 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 426.85714285714283) internal successors, (2988), 7 states have internal predecessors, (2988), 0 states have call successors, (0), 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 3147
[2023-11-29 02:50:10,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:10,533 INFO  L225             Difference]: With dead ends: 14399
[2023-11-29 02:50:10,534 INFO  L226             Difference]: Without dead ends: 9610
[2023-11-29 02:50:10,536 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3156 GetRequests, 3144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:10,537 INFO  L413           NwaCegarLoop]: 8097 mSDtfsCounter, 21925 mSDsluCounter, 31972 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21925 SdHoareTripleChecker+Valid, 40069 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:10,537 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21925 Valid, 40069 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:10,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9610 states.
[2023-11-29 02:50:10,582 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 5172.
[2023-11-29 02:50:10,585 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5172 states, 5171 states have (on average 1.6623477083736222) internal successors, (8596), 5171 states have internal predecessors, (8596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:10,590 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 8596 transitions.
[2023-11-29 02:50:10,590 INFO  L78                 Accepts]: Start accepts. Automaton has 5172 states and 8596 transitions. Word has length 3147
[2023-11-29 02:50:10,591 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:10,592 INFO  L495      AbstractCegarLoop]: Abstraction has 5172 states and 8596 transitions.
[2023-11-29 02:50:10,592 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 426.85714285714283) internal successors, (2988), 7 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:10,592 INFO  L276                IsEmpty]: Start isEmpty. Operand 5172 states and 8596 transitions.
[2023-11-29 02:50:10,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3149
[2023-11-29 02:50:10,634 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:10,634 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:10,665 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0
[2023-11-29 02:50:10,835 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59
[2023-11-29 02:50:10,835 INFO  L420      AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:10,835 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:10,836 INFO  L85        PathProgramCache]: Analyzing trace with hash -1281252659, now seen corresponding path program 1 times
[2023-11-29 02:50:10,836 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:10,836 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020243116]
[2023-11-29 02:50:10,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:10,837 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:11,031 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:11,032 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764276961]
[2023-11-29 02:50:11,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:11,032 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:11,032 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:11,033 INFO  L229       MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:11,034 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process
[2023-11-29 02:50:13,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:13,558 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12748 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:13,591 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:13,740 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked.
[2023-11-29 02:50:13,740 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:13,740 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:13,740 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020243116]
[2023-11-29 02:50:13,740 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:13,740 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764276961]
[2023-11-29 02:50:13,740 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [764276961] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:13,740 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:13,741 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:13,741 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481400518]
[2023-11-29 02:50:13,741 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:13,743 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:13,743 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:13,745 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:13,745 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:13,745 INFO  L87              Difference]: Start difference. First operand 5172 states and 8596 transitions. Second operand  has 8 states, 8 states have (on average 373.875) internal successors, (2991), 8 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:14,081 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:14,081 INFO  L93              Difference]: Finished difference Result 14407 states and 23942 transitions.
[2023-11-29 02:50:14,082 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:14,083 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.875) internal successors, (2991), 8 states have internal predecessors, (2991), 0 states have call successors, (0), 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 3148
[2023-11-29 02:50:14,085 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:14,091 INFO  L225             Difference]: With dead ends: 14407
[2023-11-29 02:50:14,091 INFO  L226             Difference]: Without dead ends: 9607
[2023-11-29 02:50:14,094 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3156 GetRequests, 3144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:14,095 INFO  L413           NwaCegarLoop]: 8088 mSDtfsCounter, 21921 mSDsluCounter, 39285 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21921 SdHoareTripleChecker+Valid, 47373 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:14,095 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21921 Valid, 47373 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:14,105 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9607 states.
[2023-11-29 02:50:14,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 5174.
[2023-11-29 02:50:14,153 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:14,159 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:14,159 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3148
[2023-11-29 02:50:14,161 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:14,161 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:14,161 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.875) internal successors, (2991), 8 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:14,162 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:14,204 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3150
[2023-11-29 02:50:14,204 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:14,205 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:50:14,238 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0
[2023-11-29 02:50:14,405 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:14,406 INFO  L420      AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:14,406 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:14,406 INFO  L85        PathProgramCache]: Analyzing trace with hash 2024042063, now seen corresponding path program 1 times
[2023-11-29 02:50:14,406 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:14,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352921047]
[2023-11-29 02:50:14,407 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:14,407 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:14,604 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:14,604 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466585852]
[2023-11-29 02:50:14,605 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:14,605 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:14,605 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:14,606 INFO  L229       MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:14,606 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process
[2023-11-29 02:50:17,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:17,305 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12751 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:50:17,340 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:17,481 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2023-11-29 02:50:17,482 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:17,482 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:17,482 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352921047]
[2023-11-29 02:50:17,482 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:17,482 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466585852]
[2023-11-29 02:50:17,482 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466585852] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:17,482 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:17,483 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:17,483 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706432167]
[2023-11-29 02:50:17,483 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:17,485 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:17,485 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:17,487 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:17,487 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:17,487 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 7 states, 7 states have (on average 427.14285714285717) internal successors, (2990), 7 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:17,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:17,783 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:17,784 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:17,784 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.14285714285717) internal successors, (2990), 7 states have internal predecessors, (2990), 0 states have call successors, (0), 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 3149
[2023-11-29 02:50:17,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:17,793 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:17,793 INFO  L226             Difference]: Without dead ends: 9615
[2023-11-29 02:50:17,796 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3157 GetRequests, 3146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:50:17,797 INFO  L413           NwaCegarLoop]: 8098 mSDtfsCounter, 21917 mSDsluCounter, 31973 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21917 SdHoareTripleChecker+Valid, 40071 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:17,797 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21917 Valid, 40071 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:50:17,803 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9615 states.
[2023-11-29 02:50:17,841 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 5174.
[2023-11-29 02:50:17,845 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:17,850 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:17,850 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3149
[2023-11-29 02:50:17,851 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:17,851 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:17,852 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.14285714285717) internal successors, (2990), 7 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:17,852 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:17,894 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3151
[2023-11-29 02:50:17,894 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:17,895 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:17,929 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0
[2023-11-29 02:50:18,095 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61
[2023-11-29 02:50:18,095 INFO  L420      AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:18,096 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:18,096 INFO  L85        PathProgramCache]: Analyzing trace with hash -1027593011, now seen corresponding path program 1 times
[2023-11-29 02:50:18,096 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:18,096 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107509305]
[2023-11-29 02:50:18,097 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:18,097 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:18,319 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:18,319 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671883025]
[2023-11-29 02:50:18,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:18,320 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:18,320 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:18,321 INFO  L229       MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:18,323 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process
[2023-11-29 02:50:21,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:21,080 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12754 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:50:21,110 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:21,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked.
[2023-11-29 02:50:21,274 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:21,274 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:21,274 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107509305]
[2023-11-29 02:50:21,274 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:21,274 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671883025]
[2023-11-29 02:50:21,274 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [671883025] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:21,274 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:21,275 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:21,275 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623749182]
[2023-11-29 02:50:21,275 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:21,277 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:21,277 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:21,279 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:21,279 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:21,280 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 373.625) internal successors, (2989), 8 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:21,621 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:21,621 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:21,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:21,623 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.625) internal successors, (2989), 8 states have internal predecessors, (2989), 0 states have call successors, (0), 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 3150
[2023-11-29 02:50:21,624 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:21,631 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:21,631 INFO  L226             Difference]: Without dead ends: 9621
[2023-11-29 02:50:21,634 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3158 GetRequests, 3146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:21,634 INFO  L413           NwaCegarLoop]: 8108 mSDtfsCounter, 21913 mSDsluCounter, 39351 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21913 SdHoareTripleChecker+Valid, 47459 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:21,634 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21913 Valid, 47459 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:21,642 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9621 states.
[2023-11-29 02:50:21,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9621 to 5174.
[2023-11-29 02:50:21,686 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:21,691 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:21,691 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3150
[2023-11-29 02:50:21,692 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:21,692 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:21,693 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.625) internal successors, (2989), 8 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:21,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:21,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3152
[2023-11-29 02:50:21,735 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:21,735 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:21,765 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0
[2023-11-29 02:50:21,936 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62
[2023-11-29 02:50:21,936 INFO  L420      AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:21,936 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:21,937 INFO  L85        PathProgramCache]: Analyzing trace with hash 1895513483, now seen corresponding path program 1 times
[2023-11-29 02:50:21,937 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:21,937 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380517106]
[2023-11-29 02:50:21,937 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:21,937 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:22,134 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:22,134 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59526705]
[2023-11-29 02:50:22,134 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:22,135 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:22,135 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:22,135 INFO  L229       MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:22,136 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process
[2023-11-29 02:50:24,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:24,832 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12757 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:50:24,861 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:25,016 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked.
[2023-11-29 02:50:25,016 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:25,017 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:25,017 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380517106]
[2023-11-29 02:50:25,017 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:25,017 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59526705]
[2023-11-29 02:50:25,017 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [59526705] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:25,017 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:25,018 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:25,018 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683337890]
[2023-11-29 02:50:25,018 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:25,019 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:25,019 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:25,020 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:25,020 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:25,021 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:25,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:25,369 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:25,369 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:25,370 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 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 3151
[2023-11-29 02:50:25,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:25,379 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:25,379 INFO  L226             Difference]: Without dead ends: 9630
[2023-11-29 02:50:25,382 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3159 GetRequests, 3147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:25,382 INFO  L413           NwaCegarLoop]: 8123 mSDtfsCounter, 21910 mSDsluCounter, 39402 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21910 SdHoareTripleChecker+Valid, 47525 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:25,382 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21910 Valid, 47525 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:25,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9630 states.
[2023-11-29 02:50:25,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 5174.
[2023-11-29 02:50:25,431 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:25,436 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:25,436 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3151
[2023-11-29 02:50:25,438 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:25,438 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:25,438 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:25,438 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:25,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3153
[2023-11-29 02:50:25,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:25,481 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:25,513 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0
[2023-11-29 02:50:25,681 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63
[2023-11-29 02:50:25,682 INFO  L420      AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:25,682 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:25,682 INFO  L85        PathProgramCache]: Analyzing trace with hash 138738997, now seen corresponding path program 1 times
[2023-11-29 02:50:25,683 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:25,683 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183388266]
[2023-11-29 02:50:25,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:25,683 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:25,903 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:25,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767096211]
[2023-11-29 02:50:25,904 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:25,904 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:25,904 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:25,905 INFO  L229       MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:25,906 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process
[2023-11-29 02:50:28,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:28,566 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12761 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:50:28,658 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:28,802 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked.
[2023-11-29 02:50:28,802 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:28,802 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:28,802 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183388266]
[2023-11-29 02:50:28,802 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:28,802 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767096211]
[2023-11-29 02:50:28,802 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [767096211] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:28,802 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:28,803 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:28,803 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848197624]
[2023-11-29 02:50:28,803 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:28,804 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:28,805 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:28,806 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:28,806 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:28,806 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 373.25) internal successors, (2986), 8 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:29,160 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:29,161 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:29,161 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:29,162 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.25) internal successors, (2986), 8 states have internal predecessors, (2986), 0 states have call successors, (0), 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 3152
[2023-11-29 02:50:29,164 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:29,172 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:29,172 INFO  L226             Difference]: Without dead ends: 9636
[2023-11-29 02:50:29,175 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3160 GetRequests, 3148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:29,175 INFO  L413           NwaCegarLoop]: 8133 mSDtfsCounter, 21906 mSDsluCounter, 39435 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21906 SdHoareTripleChecker+Valid, 47568 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:29,176 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21906 Valid, 47568 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:29,184 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9636 states.
[2023-11-29 02:50:29,229 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 5174.
[2023-11-29 02:50:29,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:29,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:29,239 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3152
[2023-11-29 02:50:29,241 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:29,241 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:29,241 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.25) internal successors, (2986), 8 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:29,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:29,285 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3154
[2023-11-29 02:50:29,285 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:29,286 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:50:29,316 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0
[2023-11-29 02:50:29,486 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64
[2023-11-29 02:50:29,486 INFO  L420      AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:29,487 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:29,487 INFO  L85        PathProgramCache]: Analyzing trace with hash 1786823305, now seen corresponding path program 1 times
[2023-11-29 02:50:29,487 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:29,487 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250900412]
[2023-11-29 02:50:29,488 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:29,488 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:29,705 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:29,705 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026581409]
[2023-11-29 02:50:29,706 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:29,706 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:29,706 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:29,707 INFO  L229       MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:29,708 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process
[2023-11-29 02:50:32,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:32,270 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12764 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:32,304 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:32,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked.
[2023-11-29 02:50:32,462 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:32,462 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:32,462 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250900412]
[2023-11-29 02:50:32,462 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:32,462 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026581409]
[2023-11-29 02:50:32,462 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026581409] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:32,462 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:32,463 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:32,463 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180511209]
[2023-11-29 02:50:32,463 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:32,465 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:32,466 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:32,468 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:32,468 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:32,469 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:32,822 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:32,823 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:32,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:32,824 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 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 3153
[2023-11-29 02:50:32,826 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:32,833 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:32,833 INFO  L226             Difference]: Without dead ends: 9645
[2023-11-29 02:50:32,836 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3161 GetRequests, 3149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:32,837 INFO  L413           NwaCegarLoop]: 8148 mSDtfsCounter, 21903 mSDsluCounter, 40262 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21903 SdHoareTripleChecker+Valid, 48410 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:32,837 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21903 Valid, 48410 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:32,844 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9645 states.
[2023-11-29 02:50:32,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 5174.
[2023-11-29 02:50:32,893 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:32,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:32,898 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3153
[2023-11-29 02:50:32,899 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:32,899 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:32,900 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:32,900 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:32,942 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3155
[2023-11-29 02:50:32,942 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:32,942 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:50:32,972 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0
[2023-11-29 02:50:33,143 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:33,143 INFO  L420      AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:33,143 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:33,144 INFO  L85        PathProgramCache]: Analyzing trace with hash 477992083, now seen corresponding path program 1 times
[2023-11-29 02:50:33,144 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:33,144 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693766065]
[2023-11-29 02:50:33,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:33,144 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:33,348 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:33,348 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135371727]
[2023-11-29 02:50:33,349 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:33,349 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:33,349 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:33,350 INFO  L229       MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:33,351 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process
[2023-11-29 02:50:36,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:36,074 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12767 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:50:36,102 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:36,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked.
[2023-11-29 02:50:36,242 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:36,242 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:36,242 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693766065]
[2023-11-29 02:50:36,242 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:36,242 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135371727]
[2023-11-29 02:50:36,242 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [135371727] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:36,242 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:36,243 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:36,243 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208285080]
[2023-11-29 02:50:36,243 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:36,244 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:36,245 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:36,246 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:36,246 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:36,247 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:36,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:36,544 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:36,545 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:36,546 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 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 3154
[2023-11-29 02:50:36,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:36,554 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:36,554 INFO  L226             Difference]: Without dead ends: 9651
[2023-11-29 02:50:36,558 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3162 GetRequests, 3151 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:50:36,558 INFO  L413           NwaCegarLoop]: 8158 mSDtfsCounter, 21899 mSDsluCounter, 32153 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21899 SdHoareTripleChecker+Valid, 40311 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:36,558 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21899 Valid, 40311 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:50:36,564 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9651 states.
[2023-11-29 02:50:36,604 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 5174.
[2023-11-29 02:50:36,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:36,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:36,614 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3154
[2023-11-29 02:50:36,615 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:36,615 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:36,616 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 426.14285714285717) internal successors, (2983), 7 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:36,616 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:36,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3156
[2023-11-29 02:50:36,684 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:36,685 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:36,718 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0
[2023-11-29 02:50:36,885 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:36,886 INFO  L420      AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:36,886 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:36,887 INFO  L85        PathProgramCache]: Analyzing trace with hash -1308483063, now seen corresponding path program 1 times
[2023-11-29 02:50:36,887 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:36,887 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331102373]
[2023-11-29 02:50:36,887 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:36,887 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:37,084 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:37,084 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091318913]
[2023-11-29 02:50:37,085 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:37,085 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:37,085 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:37,086 INFO  L229       MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:37,087 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process
[2023-11-29 02:50:39,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:39,819 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12770 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:50:39,848 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:40,003 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked.
[2023-11-29 02:50:40,003 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:40,003 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:40,003 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331102373]
[2023-11-29 02:50:40,003 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:40,004 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091318913]
[2023-11-29 02:50:40,004 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091318913] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:40,004 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:40,004 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:40,004 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271389272]
[2023-11-29 02:50:40,004 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:40,006 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:40,006 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:40,007 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:40,007 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:40,008 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:40,355 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:40,355 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:40,355 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:40,356 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 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 3155
[2023-11-29 02:50:40,358 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:40,364 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:40,364 INFO  L226             Difference]: Without dead ends: 9660
[2023-11-29 02:50:40,367 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3163 GetRequests, 3151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:40,368 INFO  L413           NwaCegarLoop]: 8173 mSDtfsCounter, 21896 mSDsluCounter, 39570 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21896 SdHoareTripleChecker+Valid, 47743 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:40,368 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21896 Valid, 47743 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:40,374 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9660 states.
[2023-11-29 02:50:40,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9660 to 5174.
[2023-11-29 02:50:40,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:40,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:40,421 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3155
[2023-11-29 02:50:40,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:40,422 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:40,423 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:40,423 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:40,464 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3157
[2023-11-29 02:50:40,465 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:40,465 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:40,496 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0
[2023-11-29 02:50:40,666 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:40,666 INFO  L420      AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:40,666 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:40,666 INFO  L85        PathProgramCache]: Analyzing trace with hash 327977917, now seen corresponding path program 1 times
[2023-11-29 02:50:40,666 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:40,667 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834116136]
[2023-11-29 02:50:40,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:40,667 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:40,867 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:40,867 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299403888]
[2023-11-29 02:50:40,867 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:40,867 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:40,868 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:40,868 INFO  L229       MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:40,869 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process
[2023-11-29 02:50:43,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:43,598 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12773 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:50:43,628 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:43,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked.
[2023-11-29 02:50:43,798 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:43,798 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:43,798 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834116136]
[2023-11-29 02:50:43,798 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:43,799 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299403888]
[2023-11-29 02:50:43,799 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [299403888] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:43,799 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:43,800 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:43,800 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186864397]
[2023-11-29 02:50:43,800 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:43,801 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:43,801 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:43,803 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:43,803 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:43,804 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:44,187 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:44,187 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:44,187 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:44,188 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 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 3156
[2023-11-29 02:50:44,190 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:44,196 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:44,196 INFO  L226             Difference]: Without dead ends: 9666
[2023-11-29 02:50:44,199 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3164 GetRequests, 3152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:44,199 INFO  L413           NwaCegarLoop]: 8183 mSDtfsCounter, 21892 mSDsluCounter, 39603 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21892 SdHoareTripleChecker+Valid, 47786 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:44,200 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21892 Valid, 47786 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:44,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9666 states.
[2023-11-29 02:50:44,248 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5174.
[2023-11-29 02:50:44,252 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:44,257 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:44,258 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3156
[2023-11-29 02:50:44,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:44,259 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:44,260 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:44,260 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:44,302 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3158
[2023-11-29 02:50:44,302 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:44,303 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:44,333 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0
[2023-11-29 02:50:44,503 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68
[2023-11-29 02:50:44,503 INFO  L420      AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:44,504 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:44,504 INFO  L85        PathProgramCache]: Analyzing trace with hash -1732423545, now seen corresponding path program 1 times
[2023-11-29 02:50:44,504 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:44,504 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439804251]
[2023-11-29 02:50:44,504 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:44,505 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:44,708 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:44,708 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268177809]
[2023-11-29 02:50:44,708 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:44,709 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:44,709 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:44,709 INFO  L229       MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:44,710 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process
[2023-11-29 02:50:47,340 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:47,407 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12777 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:50:47,435 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:47,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked.
[2023-11-29 02:50:47,578 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:47,578 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:47,578 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439804251]
[2023-11-29 02:50:47,579 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:47,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268177809]
[2023-11-29 02:50:47,579 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268177809] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:47,579 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:47,580 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:50:47,580 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308222240]
[2023-11-29 02:50:47,580 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:47,582 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:50:47,582 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:47,583 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:50:47,583 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:50:47,584 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:47,900 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:47,900 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:47,901 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:47,901 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 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 3157
[2023-11-29 02:50:47,903 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:47,910 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:47,910 INFO  L226             Difference]: Without dead ends: 9675
[2023-11-29 02:50:47,913 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3165 GetRequests, 3154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:50:47,913 INFO  L413           NwaCegarLoop]: 8198 mSDtfsCounter, 21889 mSDsluCounter, 32273 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21889 SdHoareTripleChecker+Valid, 40471 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:47,913 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21889 Valid, 40471 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:47,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9675 states.
[2023-11-29 02:50:47,960 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 5174.
[2023-11-29 02:50:47,963 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:47,968 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:47,968 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3157
[2023-11-29 02:50:47,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:47,970 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:47,970 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.42857142857144) internal successors, (2978), 7 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:47,970 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:48,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3159
[2023-11-29 02:50:48,012 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:48,013 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:50:48,043 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0
[2023-11-29 02:50:48,213 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69
[2023-11-29 02:50:48,213 INFO  L420      AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:48,214 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:48,214 INFO  L85        PathProgramCache]: Analyzing trace with hash -808247591, now seen corresponding path program 1 times
[2023-11-29 02:50:48,214 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:48,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845240061]
[2023-11-29 02:50:48,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:48,215 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:48,417 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:48,418 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807349160]
[2023-11-29 02:50:48,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:48,418 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:48,418 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:48,419 INFO  L229       MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:48,421 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process
[2023-11-29 02:50:51,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:51,181 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12780 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:51,211 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:51,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked.
[2023-11-29 02:50:51,356 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:51,356 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:51,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845240061]
[2023-11-29 02:50:51,356 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:51,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807349160]
[2023-11-29 02:50:51,356 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [807349160] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:51,356 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:51,357 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:51,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302515653]
[2023-11-29 02:50:51,357 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:51,358 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:51,359 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:51,360 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:51,360 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:51,361 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 372.125) internal successors, (2977), 8 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:51,706 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:51,706 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:51,706 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:51,707 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.125) internal successors, (2977), 8 states have internal predecessors, (2977), 0 states have call successors, (0), 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 3158
[2023-11-29 02:50:51,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:51,715 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:51,716 INFO  L226             Difference]: Without dead ends: 9681
[2023-11-29 02:50:51,719 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3166 GetRequests, 3154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:51,719 INFO  L413           NwaCegarLoop]: 8208 mSDtfsCounter, 21885 mSDsluCounter, 40502 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21885 SdHoareTripleChecker+Valid, 48710 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:51,720 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21885 Valid, 48710 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:51,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9681 states.
[2023-11-29 02:50:51,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9681 to 5174.
[2023-11-29 02:50:51,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:51,783 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:51,783 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3158
[2023-11-29 02:50:51,784 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:51,784 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:51,785 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.125) internal successors, (2977), 8 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:51,785 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:51,828 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3160
[2023-11-29 02:50:51,828 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:51,829 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:51,862 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0
[2023-11-29 02:50:52,029 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:52,029 INFO  L420      AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:52,029 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:52,030 INFO  L85        PathProgramCache]: Analyzing trace with hash 70295619, now seen corresponding path program 1 times
[2023-11-29 02:50:52,030 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:52,030 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209234485]
[2023-11-29 02:50:52,030 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:52,030 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:52,236 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:52,236 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935287069]
[2023-11-29 02:50:52,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:52,237 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:52,237 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:52,238 INFO  L229       MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:52,239 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process
[2023-11-29 02:50:54,934 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:54,998 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12783 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:55,027 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:55,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked.
[2023-11-29 02:50:55,179 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:55,179 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:55,179 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209234485]
[2023-11-29 02:50:55,179 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:55,179 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935287069]
[2023-11-29 02:50:55,179 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935287069] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:55,179 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:55,180 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:55,180 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219167575]
[2023-11-29 02:50:55,180 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:55,182 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:55,182 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:55,184 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:55,184 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:55,184 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:55,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:55,569 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:55,569 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:55,570 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 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 3159
[2023-11-29 02:50:55,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:55,579 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:55,579 INFO  L226             Difference]: Without dead ends: 9690
[2023-11-29 02:50:55,582 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3167 GetRequests, 3155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:55,582 INFO  L413           NwaCegarLoop]: 8223 mSDtfsCounter, 21882 mSDsluCounter, 40562 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21882 SdHoareTripleChecker+Valid, 48785 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:55,583 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21882 Valid, 48785 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:50:55,591 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9690 states.
[2023-11-29 02:50:55,631 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 5174.
[2023-11-29 02:50:55,635 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:55,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:55,640 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3159
[2023-11-29 02:50:55,641 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:55,641 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:55,641 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:55,641 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:55,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3161
[2023-11-29 02:50:55,683 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:55,684 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:55,717 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0
[2023-11-29 02:50:55,884 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:55,885 INFO  L420      AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:55,885 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:55,885 INFO  L85        PathProgramCache]: Analyzing trace with hash -1551398719, now seen corresponding path program 1 times
[2023-11-29 02:50:55,885 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:55,885 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144727164]
[2023-11-29 02:50:55,886 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:55,886 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:56,095 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:56,095 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997116260]
[2023-11-29 02:50:56,096 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:56,096 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:56,096 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:56,097 INFO  L229       MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:56,097 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process
[2023-11-29 02:50:58,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:50:58,905 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12787 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:50:58,939 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:50:59,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2023-11-29 02:50:59,080 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:50:59,080 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:50:59,080 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144727164]
[2023-11-29 02:50:59,080 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:50:59,080 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997116260]
[2023-11-29 02:50:59,080 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997116260] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:50:59,080 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:50:59,081 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:50:59,081 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736287211]
[2023-11-29 02:50:59,081 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:50:59,082 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:50:59,082 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:50:59,083 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:50:59,084 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:50:59,084 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 371.75) internal successors, (2974), 8 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:59,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:50:59,417 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:50:59,417 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:50:59,418 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.75) internal successors, (2974), 8 states have internal predecessors, (2974), 0 states have call successors, (0), 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 3160
[2023-11-29 02:50:59,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:50:59,427 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:50:59,427 INFO  L226             Difference]: Without dead ends: 9696
[2023-11-29 02:50:59,430 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3168 GetRequests, 3156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:50:59,430 INFO  L413           NwaCegarLoop]: 8233 mSDtfsCounter, 21878 mSDsluCounter, 39771 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21878 SdHoareTripleChecker+Valid, 48004 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:50:59,430 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21878 Valid, 48004 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:50:59,436 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9696 states.
[2023-11-29 02:50:59,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 5174.
[2023-11-29 02:50:59,483 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:59,488 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:50:59,488 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3160
[2023-11-29 02:50:59,490 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:50:59,490 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:50:59,491 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.75) internal successors, (2974), 8 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:50:59,491 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:50:59,534 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3162
[2023-11-29 02:50:59,534 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:50:59,534 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:50:59,571 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0
[2023-11-29 02:50:59,735 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:59,735 INFO  L420      AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:50:59,735 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:50:59,736 INFO  L85        PathProgramCache]: Analyzing trace with hash 1966113473, now seen corresponding path program 1 times
[2023-11-29 02:50:59,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:50:59,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714921015]
[2023-11-29 02:50:59,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:59,736 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:50:59,936 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:50:59,936 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452845702]
[2023-11-29 02:50:59,937 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:50:59,937 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:50:59,937 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:50:59,938 INFO  L229       MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:50:59,939 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process
[2023-11-29 02:51:02,378 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:02,443 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12790 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:51:02,471 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:02,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked.
[2023-11-29 02:51:02,612 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:02,612 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:02,612 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714921015]
[2023-11-29 02:51:02,613 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:02,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452845702]
[2023-11-29 02:51:02,613 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452845702] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:02,613 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:02,614 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:51:02,614 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874047352]
[2023-11-29 02:51:02,614 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:02,616 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:51:02,616 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:02,617 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:51:02,617 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:02,617 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 371.5) internal successors, (2972), 8 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:02,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:02,976 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:02,976 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:02,977 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.5) internal successors, (2972), 8 states have internal predecessors, (2972), 0 states have call successors, (0), 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 3161
[2023-11-29 02:51:02,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:02,985 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:02,986 INFO  L226             Difference]: Without dead ends: 9705
[2023-11-29 02:51:02,989 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3169 GetRequests, 3157 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:51:02,989 INFO  L413           NwaCegarLoop]: 8248 mSDtfsCounter, 21875 mSDsluCounter, 40662 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21875 SdHoareTripleChecker+Valid, 48910 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:02,989 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21875 Valid, 48910 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:02,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9705 states.
[2023-11-29 02:51:03,034 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9705 to 5174.
[2023-11-29 02:51:03,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:03,043 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:03,043 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3161
[2023-11-29 02:51:03,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:03,044 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:03,045 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.5) internal successors, (2972), 8 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:03,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:03,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3163
[2023-11-29 02:51:03,087 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:03,087 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:03,117 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0
[2023-11-29 02:51:03,288 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:03,288 INFO  L420      AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:03,288 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:03,289 INFO  L85        PathProgramCache]: Analyzing trace with hash -1913501537, now seen corresponding path program 1 times
[2023-11-29 02:51:03,289 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:03,289 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478552980]
[2023-11-29 02:51:03,289 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:03,289 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:03,522 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:03,522 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520157509]
[2023-11-29 02:51:03,523 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:03,523 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:03,523 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:03,524 INFO  L229       MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:03,528 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process
[2023-11-29 02:51:06,309 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:06,385 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12793 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:51:06,415 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:06,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked.
[2023-11-29 02:51:06,556 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:06,556 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:06,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478552980]
[2023-11-29 02:51:06,556 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:06,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520157509]
[2023-11-29 02:51:06,557 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [520157509] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:06,557 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:06,558 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:51:06,558 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573361575]
[2023-11-29 02:51:06,558 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:06,559 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:51:06,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:06,561 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:51:06,561 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:51:06,562 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:06,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:06,879 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:06,879 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:06,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 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 3162
[2023-11-29 02:51:06,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:06,889 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:06,889 INFO  L226             Difference]: Without dead ends: 9711
[2023-11-29 02:51:06,892 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:51:06,892 INFO  L413           NwaCegarLoop]: 8258 mSDtfsCounter, 21871 mSDsluCounter, 32453 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21871 SdHoareTripleChecker+Valid, 40711 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:06,892 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21871 Valid, 40711 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:06,899 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9711 states.
[2023-11-29 02:51:06,946 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9711 to 5174.
[2023-11-29 02:51:06,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:06,957 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:06,957 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3162
[2023-11-29 02:51:06,959 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:06,959 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:06,959 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:06,959 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:07,002 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3164
[2023-11-29 02:51:07,003 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:07,003 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:07,033 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0
[2023-11-29 02:51:07,203 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:07,204 INFO  L420      AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:07,204 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:07,205 INFO  L85        PathProgramCache]: Analyzing trace with hash -882443071, now seen corresponding path program 1 times
[2023-11-29 02:51:07,205 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:07,205 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132856016]
[2023-11-29 02:51:07,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:07,205 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:07,401 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:07,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431111544]
[2023-11-29 02:51:07,402 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:07,402 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:07,402 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:07,403 INFO  L229       MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:07,404 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process
[2023-11-29 02:51:10,308 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:10,372 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12796 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:51:10,401 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:10,555 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked.
[2023-11-29 02:51:10,555 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:10,555 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:10,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132856016]
[2023-11-29 02:51:10,555 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:10,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431111544]
[2023-11-29 02:51:10,555 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431111544] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:10,555 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:10,556 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:51:10,557 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071666874]
[2023-11-29 02:51:10,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:10,558 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:51:10,558 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:10,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:51:10,560 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:10,560 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:10,901 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:10,901 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:10,901 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:10,902 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 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 3163
[2023-11-29 02:51:10,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:10,910 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:10,910 INFO  L226             Difference]: Without dead ends: 9720
[2023-11-29 02:51:10,913 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3171 GetRequests, 3159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:51:10,914 INFO  L413           NwaCegarLoop]: 8273 mSDtfsCounter, 21868 mSDsluCounter, 39906 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21868 SdHoareTripleChecker+Valid, 48179 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:10,914 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21868 Valid, 48179 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:10,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9720 states.
[2023-11-29 02:51:10,959 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9720 to 5174.
[2023-11-29 02:51:10,963 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:10,967 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:10,967 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3163
[2023-11-29 02:51:10,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:10,969 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:10,970 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:10,970 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:11,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3165
[2023-11-29 02:51:11,012 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:11,012 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:11,046 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0
[2023-11-29 02:51:11,213 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:11,213 INFO  L420      AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:11,213 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:11,213 INFO  L85        PathProgramCache]: Analyzing trace with hash 286987849, now seen corresponding path program 1 times
[2023-11-29 02:51:11,214 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:11,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992023863]
[2023-11-29 02:51:11,214 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:11,214 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:11,417 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:11,417 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549686968]
[2023-11-29 02:51:11,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:11,418 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:11,418 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:11,419 INFO  L229       MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:11,420 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process
[2023-11-29 02:51:14,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:14,201 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12799 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:51:14,293 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:14,432 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked.
[2023-11-29 02:51:14,432 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:14,433 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:14,433 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992023863]
[2023-11-29 02:51:14,433 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:14,433 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549686968]
[2023-11-29 02:51:14,433 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549686968] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:14,433 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:14,434 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:51:14,434 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452943802]
[2023-11-29 02:51:14,434 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:14,436 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:51:14,436 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:14,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:51:14,437 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:14,438 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 371.0) internal successors, (2968), 8 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:14,777 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:14,777 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:14,777 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:14,778 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.0) internal successors, (2968), 8 states have internal predecessors, (2968), 0 states have call successors, (0), 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 3164
[2023-11-29 02:51:14,780 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:14,786 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:14,787 INFO  L226             Difference]: Without dead ends: 9726
[2023-11-29 02:51:14,790 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3172 GetRequests, 3160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:51:14,790 INFO  L413           NwaCegarLoop]: 8283 mSDtfsCounter, 21864 mSDsluCounter, 39939 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21864 SdHoareTripleChecker+Valid, 48222 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:14,790 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21864 Valid, 48222 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:14,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9726 states.
[2023-11-29 02:51:14,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9726 to 5174.
[2023-11-29 02:51:14,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:14,847 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:14,847 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3164
[2023-11-29 02:51:14,848 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:14,849 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:14,849 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.0) internal successors, (2968), 8 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:14,849 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:14,892 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3166
[2023-11-29 02:51:14,893 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:14,893 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:51:14,924 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0
[2023-11-29 02:51:15,094 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76
[2023-11-29 02:51:15,094 INFO  L420      AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:15,094 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:15,094 INFO  L85        PathProgramCache]: Analyzing trace with hash -1393227585, now seen corresponding path program 1 times
[2023-11-29 02:51:15,095 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:15,095 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402225281]
[2023-11-29 02:51:15,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:15,095 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:15,307 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:15,307 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553514531]
[2023-11-29 02:51:15,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:15,307 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:15,308 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:15,308 INFO  L229       MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:15,309 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process
[2023-11-29 02:51:17,979 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:18,048 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12803 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:51:18,084 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:18,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2023-11-29 02:51:18,228 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:18,228 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:18,229 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402225281]
[2023-11-29 02:51:18,229 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:18,229 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553514531]
[2023-11-29 02:51:18,229 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [553514531] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:18,229 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:18,230 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:51:18,230 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960313029]
[2023-11-29 02:51:18,230 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:18,232 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:51:18,232 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:18,233 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:51:18,233 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:51:18,234 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 7 states, 7 states have (on average 423.7142857142857) internal successors, (2966), 7 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:18,548 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:18,548 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:18,548 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:18,549 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 423.7142857142857) internal successors, (2966), 7 states have internal predecessors, (2966), 0 states have call successors, (0), 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 3165
[2023-11-29 02:51:18,551 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:18,558 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:18,558 INFO  L226             Difference]: Without dead ends: 9735
[2023-11-29 02:51:18,560 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3173 GetRequests, 3162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:51:18,561 INFO  L413           NwaCegarLoop]: 8298 mSDtfsCounter, 21861 mSDsluCounter, 32573 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21861 SdHoareTripleChecker+Valid, 40871 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:18,561 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21861 Valid, 40871 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:18,567 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9735 states.
[2023-11-29 02:51:18,607 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 5174.
[2023-11-29 02:51:18,610 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:18,615 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:18,615 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3165
[2023-11-29 02:51:18,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:18,617 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:18,617 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 423.7142857142857) internal successors, (2966), 7 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:18,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:18,659 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3167
[2023-11-29 02:51:18,659 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:18,660 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:18,694 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0
[2023-11-29 02:51:18,860 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77
[2023-11-29 02:51:18,860 INFO  L420      AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:18,861 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:18,861 INFO  L85        PathProgramCache]: Analyzing trace with hash -815770395, now seen corresponding path program 1 times
[2023-11-29 02:51:18,861 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:18,861 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868647996]
[2023-11-29 02:51:18,862 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:18,862 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:19,065 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:19,065 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418904437]
[2023-11-29 02:51:19,066 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:19,066 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:19,066 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:19,067 INFO  L229       MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:19,068 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process
[2023-11-29 02:51:21,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:21,783 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12806 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:51:21,816 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:21,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked.
[2023-11-29 02:51:21,973 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:21,973 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:21,973 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868647996]
[2023-11-29 02:51:21,973 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:21,973 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418904437]
[2023-11-29 02:51:21,974 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [418904437] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:21,974 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:21,975 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:51:21,975 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125973104]
[2023-11-29 02:51:21,975 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:21,977 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:51:21,977 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:21,978 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:51:21,978 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:21,978 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:22,328 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:22,328 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:22,328 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:22,329 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 0 states have call successors, (0), 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 3166
[2023-11-29 02:51:22,331 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:22,337 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:22,337 INFO  L226             Difference]: Without dead ends: 9741
[2023-11-29 02:51:22,340 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3174 GetRequests, 3162 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:51:22,340 INFO  L413           NwaCegarLoop]: 8308 mSDtfsCounter, 21857 mSDsluCounter, 40902 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21857 SdHoareTripleChecker+Valid, 49210 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:22,340 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21857 Valid, 49210 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:22,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9741 states.
[2023-11-29 02:51:22,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9741 to 5174.
[2023-11-29 02:51:22,389 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:22,394 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:22,394 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3166
[2023-11-29 02:51:22,395 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:22,395 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:22,396 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:22,396 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:22,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3168
[2023-11-29 02:51:22,463 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:22,464 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:22,496 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0
[2023-11-29 02:51:22,664 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78
[2023-11-29 02:51:22,665 INFO  L420      AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:22,666 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:22,666 INFO  L85        PathProgramCache]: Analyzing trace with hash -997615365, now seen corresponding path program 1 times
[2023-11-29 02:51:22,666 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:22,666 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427598000]
[2023-11-29 02:51:22,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:22,667 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:22,870 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:22,870 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417645220]
[2023-11-29 02:51:22,871 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:22,871 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:22,871 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:22,872 INFO  L229       MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:22,873 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process
[2023-11-29 02:51:25,523 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:25,588 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12809 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:51:25,617 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:25,770 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked.
[2023-11-29 02:51:25,771 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:25,771 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:25,771 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427598000]
[2023-11-29 02:51:25,771 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:25,771 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417645220]
[2023-11-29 02:51:25,771 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417645220] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:25,771 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:25,772 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:51:25,772 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930755520]
[2023-11-29 02:51:25,772 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:25,774 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:51:25,774 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:25,776 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:51:25,776 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:25,776 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 370.375) internal successors, (2963), 8 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:26,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:26,133 INFO  L93              Difference]: Finished difference Result 14411 states and 23944 transitions.
[2023-11-29 02:51:26,133 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:51:26,134 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 370.375) internal successors, (2963), 8 states have internal predecessors, (2963), 0 states have call successors, (0), 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 3167
[2023-11-29 02:51:26,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:26,143 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:51:26,143 INFO  L226             Difference]: Without dead ends: 9750
[2023-11-29 02:51:26,146 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3175 GetRequests, 3163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:51:26,146 INFO  L413           NwaCegarLoop]: 8323 mSDtfsCounter, 21854 mSDsluCounter, 40962 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21854 SdHoareTripleChecker+Valid, 49285 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:26,146 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21854 Valid, 49285 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:26,153 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9750 states.
[2023-11-29 02:51:26,194 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9750 to 5174.
[2023-11-29 02:51:26,198 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6620916296153103) internal successors, (8598), 5173 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:26,204 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8598 transitions.
[2023-11-29 02:51:26,204 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8598 transitions. Word has length 3167
[2023-11-29 02:51:26,205 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:26,205 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8598 transitions.
[2023-11-29 02:51:26,206 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 370.375) internal successors, (2963), 8 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:26,206 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8598 transitions.
[2023-11-29 02:51:26,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:51:26,249 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:26,250 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:26,284 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0
[2023-11-29 02:51:26,450 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:26,450 INFO  L420      AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:26,451 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:26,451 INFO  L85        PathProgramCache]: Analyzing trace with hash -362244019, now seen corresponding path program 1 times
[2023-11-29 02:51:26,451 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:26,451 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527823339]
[2023-11-29 02:51:26,452 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:26,452 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:26,657 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:26,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046077937]
[2023-11-29 02:51:26,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:26,658 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:26,658 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:26,659 INFO  L229       MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:26,659 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process
[2023-11-29 02:51:29,391 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:29,473 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12813 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:51:29,504 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:29,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:29,564 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:29,564 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:29,564 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527823339]
[2023-11-29 02:51:29,564 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:29,564 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046077937]
[2023-11-29 02:51:29,565 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046077937] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:29,565 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:29,566 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:51:29,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802907052]
[2023-11-29 02:51:29,566 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:29,568 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:51:29,568 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:29,569 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:51:29,569 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:51:29,570 INFO  L87              Difference]: Start difference. First operand 5174 states and 8598 transitions. Second operand  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:29,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:29,834 INFO  L93              Difference]: Finished difference Result 14420 states and 23956 transitions.
[2023-11-29 02:51:29,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:51:29,835 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 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 3168
[2023-11-29 02:51:29,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:29,842 INFO  L225             Difference]: With dead ends: 14420
[2023-11-29 02:51:29,842 INFO  L226             Difference]: Without dead ends: 9796
[2023-11-29 02:51:29,845 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:29,846 INFO  L413           NwaCegarLoop]: 8773 mSDtfsCounter, 7474 mSDsluCounter, 33985 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7474 SdHoareTripleChecker+Valid, 42758 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:29,846 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7474 Valid, 42758 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:29,853 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9796 states.
[2023-11-29 02:51:29,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9796 to 5179.
[2023-11-29 02:51:29,903 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5179 states, 5178 states have (on average 1.6614522981846274) internal successors, (8603), 5178 states have internal predecessors, (8603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:29,909 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5179 states to 5179 states and 8603 transitions.
[2023-11-29 02:51:29,909 INFO  L78                 Accepts]: Start accepts. Automaton has 5179 states and 8603 transitions. Word has length 3168
[2023-11-29 02:51:29,910 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:29,910 INFO  L495      AbstractCegarLoop]: Abstraction has 5179 states and 8603 transitions.
[2023-11-29 02:51:29,911 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:29,911 INFO  L276                IsEmpty]: Start isEmpty. Operand 5179 states and 8603 transitions.
[2023-11-29 02:51:29,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:51:29,956 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:29,957 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:29,991 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0
[2023-11-29 02:51:30,157 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:30,157 INFO  L420      AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:30,157 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:30,158 INFO  L85        PathProgramCache]: Analyzing trace with hash 455389259, now seen corresponding path program 1 times
[2023-11-29 02:51:30,158 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:30,158 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832742376]
[2023-11-29 02:51:30,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:30,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:30,362 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:30,362 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43616367]
[2023-11-29 02:51:30,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:30,363 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:30,363 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:30,364 INFO  L229       MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:30,364 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process
[2023-11-29 02:51:33,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:33,137 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12813 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:51:33,162 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:33,224 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:33,224 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:33,224 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:33,225 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832742376]
[2023-11-29 02:51:33,225 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:33,225 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43616367]
[2023-11-29 02:51:33,225 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [43616367] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:33,225 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:33,226 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:51:33,226 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020146938]
[2023-11-29 02:51:33,226 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:33,228 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:51:33,228 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:33,230 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:51:33,230 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:51:33,230 INFO  L87              Difference]: Start difference. First operand 5179 states and 8603 transitions. Second operand  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:33,518 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:33,519 INFO  L93              Difference]: Finished difference Result 14436 states and 23972 transitions.
[2023-11-29 02:51:33,519 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:51:33,520 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 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 3168
[2023-11-29 02:51:33,520 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:33,526 INFO  L225             Difference]: With dead ends: 14436
[2023-11-29 02:51:33,526 INFO  L226             Difference]: Without dead ends: 9807
[2023-11-29 02:51:33,530 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:33,530 INFO  L413           NwaCegarLoop]: 9133 mSDtfsCounter, 7474 mSDsluCounter, 35065 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7474 SdHoareTripleChecker+Valid, 44198 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:33,531 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7474 Valid, 44198 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:33,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9807 states.
[2023-11-29 02:51:33,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 5184.
[2023-11-29 02:51:33,590 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5184 states, 5183 states have (on average 1.6608142002701138) internal successors, (8608), 5183 states have internal predecessors, (8608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:33,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 8608 transitions.
[2023-11-29 02:51:33,596 INFO  L78                 Accepts]: Start accepts. Automaton has 5184 states and 8608 transitions. Word has length 3168
[2023-11-29 02:51:33,597 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:33,597 INFO  L495      AbstractCegarLoop]: Abstraction has 5184 states and 8608 transitions.
[2023-11-29 02:51:33,597 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:33,597 INFO  L276                IsEmpty]: Start isEmpty. Operand 5184 states and 8608 transitions.
[2023-11-29 02:51:33,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:51:33,641 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:33,642 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:33,676 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0
[2023-11-29 02:51:33,842 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:33,843 INFO  L420      AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:33,843 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:33,843 INFO  L85        PathProgramCache]: Analyzing trace with hash -1539268407, now seen corresponding path program 1 times
[2023-11-29 02:51:33,843 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:33,843 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884993122]
[2023-11-29 02:51:33,844 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:33,844 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:34,041 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:34,041 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148403288]
[2023-11-29 02:51:34,042 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:34,042 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:34,042 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:34,043 INFO  L229       MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:34,043 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process
[2023-11-29 02:51:36,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:36,905 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12813 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:51:36,931 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:36,993 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:36,993 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:36,994 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:36,994 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884993122]
[2023-11-29 02:51:36,994 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:36,994 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148403288]
[2023-11-29 02:51:36,994 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [148403288] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:36,994 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:36,994 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:51:36,995 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126408265]
[2023-11-29 02:51:36,995 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:36,996 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:51:36,996 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:36,997 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:51:36,997 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:51:36,998 INFO  L87              Difference]: Start difference. First operand 5184 states and 8608 transitions. Second operand  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:37,307 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:37,308 INFO  L93              Difference]: Finished difference Result 14451 states and 23987 transitions.
[2023-11-29 02:51:37,308 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:51:37,309 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 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 3168
[2023-11-29 02:51:37,310 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:37,317 INFO  L225             Difference]: With dead ends: 14451
[2023-11-29 02:51:37,317 INFO  L226             Difference]: Without dead ends: 9817
[2023-11-29 02:51:37,320 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:37,320 INFO  L413           NwaCegarLoop]: 12325 mSDtfsCounter, 7474 mSDsluCounter, 44641 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7474 SdHoareTripleChecker+Valid, 56966 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:37,320 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7474 Valid, 56966 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:37,326 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9817 states.
[2023-11-29 02:51:37,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9817 to 5189.
[2023-11-29 02:51:37,371 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5189 states, 5188 states have (on average 1.66017733230532) internal successors, (8613), 5188 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:37,376 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8613 transitions.
[2023-11-29 02:51:37,376 INFO  L78                 Accepts]: Start accepts. Automaton has 5189 states and 8613 transitions. Word has length 3168
[2023-11-29 02:51:37,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:37,377 INFO  L495      AbstractCegarLoop]: Abstraction has 5189 states and 8613 transitions.
[2023-11-29 02:51:37,378 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:37,378 INFO  L276                IsEmpty]: Start isEmpty. Operand 5189 states and 8613 transitions.
[2023-11-29 02:51:37,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:51:37,421 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:37,422 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:37,460 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0
[2023-11-29 02:51:37,622 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:37,622 INFO  L420      AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:37,622 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:37,623 INFO  L85        PathProgramCache]: Analyzing trace with hash -472383289, now seen corresponding path program 1 times
[2023-11-29 02:51:37,623 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:37,623 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710284940]
[2023-11-29 02:51:37,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:37,623 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:37,826 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:37,826 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421192020]
[2023-11-29 02:51:37,827 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:37,827 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:37,827 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:37,828 INFO  L229       MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:37,828 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process
[2023-11-29 02:51:40,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:40,524 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12813 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:51:40,552 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:40,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:40,621 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:51:40,622 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:40,622 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710284940]
[2023-11-29 02:51:40,622 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:40,622 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421192020]
[2023-11-29 02:51:40,622 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421192020] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:51:40,622 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:51:40,623 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:51:40,623 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388036892]
[2023-11-29 02:51:40,623 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:51:40,624 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:51:40,624 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:40,626 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:51:40,626 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:51:40,626 INFO  L87              Difference]: Start difference. First operand 5189 states and 8613 transitions. Second operand  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:40,921 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:51:40,921 INFO  L93              Difference]: Finished difference Result 14465 states and 24001 transitions.
[2023-11-29 02:51:40,922 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:51:40,922 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 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 3168
[2023-11-29 02:51:40,924 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:51:40,930 INFO  L225             Difference]: With dead ends: 14465
[2023-11-29 02:51:40,930 INFO  L226             Difference]: Without dead ends: 9826
[2023-11-29 02:51:40,934 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:51:40,934 INFO  L413           NwaCegarLoop]: 12521 mSDtfsCounter, 7474 mSDsluCounter, 45229 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7474 SdHoareTripleChecker+Valid, 57750 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:51:40,934 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7474 Valid, 57750 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:51:40,942 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9826 states.
[2023-11-29 02:51:40,989 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 5194.
[2023-11-29 02:51:40,993 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5194 states, 5193 states have (on average 1.6595416907375313) internal successors, (8618), 5193 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:40,999 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 8618 transitions.
[2023-11-29 02:51:40,999 INFO  L78                 Accepts]: Start accepts. Automaton has 5194 states and 8618 transitions. Word has length 3168
[2023-11-29 02:51:41,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:51:41,000 INFO  L495      AbstractCegarLoop]: Abstraction has 5194 states and 8618 transitions.
[2023-11-29 02:51:41,001 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 528.0) internal successors, (3168), 6 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:51:41,001 INFO  L276                IsEmpty]: Start isEmpty. Operand 5194 states and 8618 transitions.
[2023-11-29 02:51:41,072 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:51:41,072 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:51:41,073 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:51:41,111 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0
[2023-11-29 02:51:41,273 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:41,273 INFO  L420      AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:51:41,274 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:51:41,275 INFO  L85        PathProgramCache]: Analyzing trace with hash -1720823611, now seen corresponding path program 1 times
[2023-11-29 02:51:41,275 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:51:41,275 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886539261]
[2023-11-29 02:51:41,275 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:41,275 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:51:41,479 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:51:41,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125434681]
[2023-11-29 02:51:41,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:51:41,480 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:51:41,480 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:51:41,481 INFO  L229       MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:51:41,481 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process
[2023-11-29 02:51:44,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:51:44,216 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12813 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-29 02:51:44,250 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:51:46,842 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 150 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:46,842 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:51:59,905 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 150 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:51:59,906 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:51:59,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886539261]
[2023-11-29 02:51:59,906 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:51:59,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125434681]
[2023-11-29 02:51:59,906 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [125434681] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:51:59,906 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:51:59,908 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19
[2023-11-29 02:51:59,908 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716851345]
[2023-11-29 02:51:59,908 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:51:59,912 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-29 02:51:59,912 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:51:59,916 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-29 02:51:59,916 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342
[2023-11-29 02:51:59,918 INFO  L87              Difference]: Start difference. First operand 5194 states and 8618 transitions. Second operand  has 19 states, 19 states have (on average 322.3157894736842) internal successors, (6124), 19 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:06,587 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:52:06,588 INFO  L93              Difference]: Finished difference Result 24671 states and 40810 transitions.
[2023-11-29 02:52:06,588 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-11-29 02:52:06,589 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 322.3157894736842) internal successors, (6124), 19 states have internal predecessors, (6124), 0 states have call successors, (0), 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 3168
[2023-11-29 02:52:06,591 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:52:06,605 INFO  L225             Difference]: With dead ends: 24671
[2023-11-29 02:52:06,606 INFO  L226             Difference]: Without dead ends: 19849
[2023-11-29 02:52:06,612 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6364 GetRequests, 6323 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806
[2023-11-29 02:52:06,612 INFO  L413           NwaCegarLoop]: 8263 mSDtfsCounter, 143749 mSDsluCounter, 83048 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143749 SdHoareTripleChecker+Valid, 91311 SdHoareTripleChecker+Invalid, 6160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:52:06,612 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [143749 Valid, 91311 Invalid, 6160 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [6 Valid, 6154 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2023-11-29 02:52:06,625 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19849 states.
[2023-11-29 02:52:06,743 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19849 to 9815.
[2023-11-29 02:52:06,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9815 states, 9814 states have (on average 1.6592622783778277) internal successors, (16284), 9814 states have internal predecessors, (16284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:06,759 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 16284 transitions.
[2023-11-29 02:52:06,759 INFO  L78                 Accepts]: Start accepts. Automaton has 9815 states and 16284 transitions. Word has length 3168
[2023-11-29 02:52:06,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:52:06,761 INFO  L495      AbstractCegarLoop]: Abstraction has 9815 states and 16284 transitions.
[2023-11-29 02:52:06,762 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 322.3157894736842) internal successors, (6124), 19 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:06,762 INFO  L276                IsEmpty]: Start isEmpty. Operand 9815 states and 16284 transitions.
[2023-11-29 02:52:06,807 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3170
[2023-11-29 02:52:06,807 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:52:06,808 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:52:06,846 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0
[2023-11-29 02:52:07,008 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84
[2023-11-29 02:52:07,008 INFO  L420      AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:52:07,008 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:52:07,009 INFO  L85        PathProgramCache]: Analyzing trace with hash 1222220369, now seen corresponding path program 1 times
[2023-11-29 02:52:07,009 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:52:07,009 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051106464]
[2023-11-29 02:52:07,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:52:07,010 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:52:07,214 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:52:07,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732189097]
[2023-11-29 02:52:07,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:52:07,215 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:52:07,215 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:52:07,216 INFO  L229       MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:52:07,217 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process
[2023-11-29 02:52:09,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:52:09,864 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12816 conjuncts, 27 conjunts are in the unsatisfiable core
[2023-11-29 02:52:09,898 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:52:12,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 140 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:52:12,899 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:52:16,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 148 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:52:16,446 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:52:16,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051106464]
[2023-11-29 02:52:16,446 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:52:16,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732189097]
[2023-11-29 02:52:16,446 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [732189097] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:52:16,446 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:52:16,447 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21
[2023-11-29 02:52:16,448 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202521832]
[2023-11-29 02:52:16,448 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:52:16,450 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-11-29 02:52:16,450 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:52:16,453 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-11-29 02:52:16,453 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420
[2023-11-29 02:52:16,454 INFO  L87              Difference]: Start difference. First operand 9815 states and 16284 transitions. Second operand  has 21 states, 21 states have (on average 292.4761904761905) internal successors, (6142), 21 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:38,060 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:52:38,060 INFO  L93              Difference]: Finished difference Result 73402 states and 121521 transitions.
[2023-11-29 02:52:38,060 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-29 02:52:38,061 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 21 states have (on average 292.4761904761905) internal successors, (6142), 21 states have internal predecessors, (6142), 0 states have call successors, (0), 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 3169
[2023-11-29 02:52:38,063 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:52:38,103 INFO  L225             Difference]: With dead ends: 73402
[2023-11-29 02:52:38,103 INFO  L226             Difference]: Without dead ends: 63720
[2023-11-29 02:52:38,116 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6381 GetRequests, 6327 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=642, Invalid=2438, Unknown=0, NotChecked=0, Total=3080
[2023-11-29 02:52:38,116 INFO  L413           NwaCegarLoop]: 12990 mSDtfsCounter, 159529 mSDsluCounter, 155257 mSDsCounter, 0 mSdLazyCounter, 35380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159529 SdHoareTripleChecker+Valid, 168247 SdHoareTripleChecker+Invalid, 35394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.7s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:52:38,116 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [159529 Valid, 168247 Invalid, 35394 Unknown, 0 Unchecked, 0.7s Time], IncrementalHoareTripleChecker [14 Valid, 35380 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time]
[2023-11-29 02:52:38,156 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63720 states.
[2023-11-29 02:52:38,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63720 to 15258.
[2023-11-29 02:52:38,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15258 states, 15257 states have (on average 1.6595661008061873) internal successors, (25320), 15257 states have internal predecessors, (25320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:38,530 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 25320 transitions.
[2023-11-29 02:52:38,531 INFO  L78                 Accepts]: Start accepts. Automaton has 15258 states and 25320 transitions. Word has length 3169
[2023-11-29 02:52:38,532 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:52:38,532 INFO  L495      AbstractCegarLoop]: Abstraction has 15258 states and 25320 transitions.
[2023-11-29 02:52:38,533 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 21 states have (on average 292.4761904761905) internal successors, (6142), 21 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:38,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 15258 states and 25320 transitions.
[2023-11-29 02:52:38,586 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3171
[2023-11-29 02:52:38,586 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:52:38,586 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:52:38,626 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0
[2023-11-29 02:52:38,787 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85
[2023-11-29 02:52:38,787 INFO  L420      AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:52:38,787 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:52:38,788 INFO  L85        PathProgramCache]: Analyzing trace with hash 487698093, now seen corresponding path program 1 times
[2023-11-29 02:52:38,788 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:52:38,788 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14191618]
[2023-11-29 02:52:38,788 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:52:38,788 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:52:39,000 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:52:39,000 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367237164]
[2023-11-29 02:52:39,001 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:52:39,001 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:52:39,001 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:52:39,002 INFO  L229       MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:52:39,002 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process
[2023-11-29 02:52:41,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:52:41,712 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12819 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-29 02:52:41,742 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:52:44,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 130 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:52:44,763 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:52:48,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 144 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:52:48,417 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:52:48,417 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14191618]
[2023-11-29 02:52:48,417 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:52:48,417 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367237164]
[2023-11-29 02:52:48,417 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367237164] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:52:48,417 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:52:48,419 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19
[2023-11-29 02:52:48,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578893419]
[2023-11-29 02:52:48,419 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:52:48,422 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-29 02:52:48,422 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:52:48,424 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-29 02:52:48,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342
[2023-11-29 02:52:48,425 INFO  L87              Difference]: Start difference. First operand 15258 states and 25320 transitions. Second operand  has 19 states, 19 states have (on average 324.10526315789474) internal successors, (6158), 19 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:52:59,916 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:52:59,916 INFO  L93              Difference]: Finished difference Result 84073 states and 139109 transitions.
[2023-11-29 02:52:59,917 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-11-29 02:52:59,918 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 324.10526315789474) internal successors, (6158), 19 states have internal predecessors, (6158), 0 states have call successors, (0), 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 3170
[2023-11-29 02:52:59,919 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:52:59,956 INFO  L225             Difference]: With dead ends: 84073
[2023-11-29 02:52:59,956 INFO  L226             Difference]: Without dead ends: 68948
[2023-11-29 02:52:59,965 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6370 GetRequests, 6328 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892
[2023-11-29 02:52:59,965 INFO  L413           NwaCegarLoop]: 6656 mSDtfsCounter, 140237 mSDsluCounter, 65895 mSDsCounter, 0 mSdLazyCounter, 17186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140237 SdHoareTripleChecker+Valid, 72551 SdHoareTripleChecker+Invalid, 17199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time
[2023-11-29 02:52:59,966 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [140237 Valid, 72551 Invalid, 17199 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [13 Valid, 17186 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time]
[2023-11-29 02:53:00,002 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68948 states.
[2023-11-29 02:53:00,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68948 to 21127.
[2023-11-29 02:53:00,383 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21127 states, 21126 states have (on average 1.6598504212818328) internal successors, (35066), 21126 states have internal predecessors, (35066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:53:00,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21127 states to 21127 states and 35066 transitions.
[2023-11-29 02:53:00,407 INFO  L78                 Accepts]: Start accepts. Automaton has 21127 states and 35066 transitions. Word has length 3170
[2023-11-29 02:53:00,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:53:00,409 INFO  L495      AbstractCegarLoop]: Abstraction has 21127 states and 35066 transitions.
[2023-11-29 02:53:00,410 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 324.10526315789474) internal successors, (6158), 19 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:53:00,410 INFO  L276                IsEmpty]: Start isEmpty. Operand 21127 states and 35066 transitions.
[2023-11-29 02:53:00,464 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3172
[2023-11-29 02:53:00,465 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:53:00,465 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:53:00,505 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0
[2023-11-29 02:53:00,665 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86
[2023-11-29 02:53:00,666 INFO  L420      AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:53:00,666 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:53:00,666 INFO  L85        PathProgramCache]: Analyzing trace with hash -1248616609, now seen corresponding path program 1 times
[2023-11-29 02:53:00,666 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:53:00,666 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792750829]
[2023-11-29 02:53:00,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:53:00,667 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:53:00,868 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:53:00,868 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846135100]
[2023-11-29 02:53:00,869 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:53:00,869 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:53:00,869 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:53:00,870 INFO  L229       MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:53:00,871 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process
[2023-11-29 02:53:03,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:53:03,798 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12822 conjuncts, 25 conjunts are in the unsatisfiable core
[2023-11-29 02:53:03,834 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:53:07,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 120 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:53:07,103 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:53:10,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 140 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:53:10,941 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:53:10,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792750829]
[2023-11-29 02:53:10,941 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:53:10,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846135100]
[2023-11-29 02:53:10,941 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846135100] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:53:10,941 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:53:10,943 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21
[2023-11-29 02:53:10,943 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526134466]
[2023-11-29 02:53:10,943 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:53:10,946 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-11-29 02:53:10,947 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:53:10,949 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-11-29 02:53:10,949 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420
[2023-11-29 02:53:10,950 INFO  L87              Difference]: Start difference. First operand 21127 states and 35066 transitions. Second operand  has 21 states, 21 states have (on average 294.0952380952381) internal successors, (6176), 21 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:53:30,707 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:53:30,707 INFO  L93              Difference]: Finished difference Result 167757 states and 277784 transitions.
[2023-11-29 02:53:30,708 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-29 02:53:30,709 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 21 states have (on average 294.0952380952381) internal successors, (6176), 21 states have internal predecessors, (6176), 0 states have call successors, (0), 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 3171
[2023-11-29 02:53:30,710 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:53:30,795 INFO  L225             Difference]: With dead ends: 167757
[2023-11-29 02:53:30,795 INFO  L226             Difference]: Without dead ends: 146763
[2023-11-29 02:53:30,808 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6385 GetRequests, 6331 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=642, Invalid=2438, Unknown=0, NotChecked=0, Total=3080
[2023-11-29 02:53:30,809 INFO  L413           NwaCegarLoop]: 12990 mSDtfsCounter, 186201 mSDsluCounter, 122833 mSDsCounter, 0 mSdLazyCounter, 28507 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186201 SdHoareTripleChecker+Valid, 135823 SdHoareTripleChecker+Invalid, 28521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 02:53:30,809 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [186201 Valid, 135823 Invalid, 28521 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [14 Valid, 28507 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 02:53:30,881 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146763 states.
[2023-11-29 02:53:31,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146763 to 27440.
[2023-11-29 02:53:31,510 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27440 states, 27439 states have (on average 1.660118808994497) internal successors, (45552), 27439 states have internal predecessors, (45552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:53:31,543 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27440 states to 27440 states and 45552 transitions.
[2023-11-29 02:53:31,543 INFO  L78                 Accepts]: Start accepts. Automaton has 27440 states and 45552 transitions. Word has length 3171
[2023-11-29 02:53:31,545 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:53:31,545 INFO  L495      AbstractCegarLoop]: Abstraction has 27440 states and 45552 transitions.
[2023-11-29 02:53:31,546 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 21 states have (on average 294.0952380952381) internal successors, (6176), 21 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:53:31,546 INFO  L276                IsEmpty]: Start isEmpty. Operand 27440 states and 45552 transitions.
[2023-11-29 02:53:31,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3173
[2023-11-29 02:53:31,608 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:53:31,609 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:53:31,646 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0
[2023-11-29 02:53:31,809 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:53:31,810 INFO  L420      AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:53:31,811 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:53:31,812 INFO  L85        PathProgramCache]: Analyzing trace with hash -1437794053, now seen corresponding path program 1 times
[2023-11-29 02:53:31,813 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:53:31,813 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533801695]
[2023-11-29 02:53:31,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:53:31,815 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:53:32,046 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:53:32,047 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744962086]
[2023-11-29 02:53:32,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:53:32,047 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:53:32,047 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:53:32,048 INFO  L229       MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:53:32,049 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ead9efb-eec8-4df5-b471-9070c859da42/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process
[2023-11-29 02:53:34,717 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:53:34,794 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12825 conjuncts, 85 conjunts are in the unsatisfiable core
[2023-11-29 02:53:34,833 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:54:05,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:54:05,536 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:54:33,215 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:54:33,215 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:54:33,215 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533801695]
[2023-11-29 02:54:33,215 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:54:33,215 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744962086]
[2023-11-29 02:54:33,215 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744962086] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:54:33,215 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:54:33,217 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49
[2023-11-29 02:54:33,217 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449814181]
[2023-11-29 02:54:33,217 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:54:33,220 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 49 states
[2023-11-29 02:54:33,220 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:54:33,223 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2023-11-29 02:54:33,223 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352
[2023-11-29 02:54:33,224 INFO  L87              Difference]: Start difference. First operand 27440 states and 45552 transitions. Second operand  has 49 states, 49 states have (on average 126.38775510204081) internal successors, (6193), 49 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)