./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.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_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/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_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/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_febe2071-6d1f-42c3-905c-f0dea63652b7/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 6a472d9c6e5a191b6114a71c0f9f5e3ee803c9f40323b0c16fee63da2850e0dc
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 02:15:48,823 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 02:15:48,888 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 02:15:48,892 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 02:15:48,893 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 02:15:48,919 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 02:15:48,920 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 02:15:48,921 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 02:15:48,922 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 02:15:48,922 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 02:15:48,923 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 02:15:48,923 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 02:15:48,924 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 02:15:48,924 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 02:15:48,925 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 02:15:48,925 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 02:15:48,926 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 02:15:48,926 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 02:15:48,927 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 02:15:48,927 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 02:15:48,928 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 02:15:48,929 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 02:15:48,929 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 02:15:48,929 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 02:15:48,930 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 02:15:48,930 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 02:15:48,931 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 02:15:48,940 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 02:15:48,941 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:15:48,941 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 02:15:48,942 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 02:15:48,942 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 02:15:48,942 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 02:15:48,943 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 02:15:48,943 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 02:15:48,943 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 02:15:48,943 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 02:15:48,944 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 02:15:48,944 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 02:15:48,944 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_febe2071-6d1f-42c3-905c-f0dea63652b7/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_febe2071-6d1f-42c3-905c-f0dea63652b7/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 -> 6a472d9c6e5a191b6114a71c0f9f5e3ee803c9f40323b0c16fee63da2850e0dc
[2023-11-29 02:15:49,170 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 02:15:49,191 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 02:15:49,194 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 02:15:49,195 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 02:15:49,196 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 02:15:49,197 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.c
[2023-11-29 02:15:51,900 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 02:15:52,663 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 02:15:52,664 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.c
[2023-11-29 02:15:52,761 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/data/2473a6752/6277e1c434b348128db08e1eb94392f2/FLAG8d35796ee
[2023-11-29 02:15:52,776 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/data/2473a6752/6277e1c434b348128db08e1eb94392f2
[2023-11-29 02:15:52,778 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 02:15:52,780 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 02:15:52,781 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 02:15:52,781 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 02:15:52,786 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 02:15:52,787 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:15:52" (1/1) ...
[2023-11-29 02:15:52,788 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0613d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:52, skipping insertion in model container
[2023-11-29 02:15:52,788 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:15:52" (1/1) ...
[2023-11-29 02:15:53,119 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 02:15:53,537 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_febe2071-6d1f-42c3-905c-f0dea63652b7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.c[1175,1188]
[2023-11-29 02:15:55,660 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:15:55,669 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 02:15:55,677 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_febe2071-6d1f-42c3-905c-f0dea63652b7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.4.prop1-func-interl.c[1175,1188]
[2023-11-29 02:15:57,491 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:15:57,506 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 02:15:57,507 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57 WrapperNode
[2023-11-29 02:15:57,507 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 02:15:57,508 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 02:15:57,508 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 02:15:57,508 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 02:15:57,515 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:15:57,870 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:02,266 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80984
[2023-11-29 02:16:02,267 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 02:16:02,267 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 02:16:02,267 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 02:16:02,268 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 02:16:02,277 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:02,277 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:03,649 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:04,338 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 02:16:04,338 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:04,338 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:05,360 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:05,525 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:05,720 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:05,879 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:06,869 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 02:16:06,870 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 02:16:06,871 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 02:16:06,871 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 02:16:06,871 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (1/1) ...
[2023-11-29 02:16:06,876 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:16:06,886 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:16:06,902 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 02:16:06,904 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 02:16:06,937 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 02:16:06,937 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 02:16:06,937 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 02:16:06,937 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 02:16:10,423 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 02:16:10,424 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 02:16:43,581 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 02:16:44,679 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 02:16:44,679 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 02:16:44,686 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:16:44 BoogieIcfgContainer
[2023-11-29 02:16:44,686 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 02:16:44,688 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 02:16:44,689 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 02:16:44,692 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 02:16:44,692 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:15:52" (1/3) ...
[2023-11-29 02:16:44,693 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9a7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:16:44, skipping insertion in model container
[2023-11-29 02:16:44,693 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:15:57" (2/3) ...
[2023-11-29 02:16:44,693 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9a7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:16:44, skipping insertion in model container
[2023-11-29 02:16:44,694 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:16:44" (3/3) ...
[2023-11-29 02:16:44,695 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.4.prop1-func-interl.c
[2023-11-29 02:16:44,713 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 02:16:44,713 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 02:16:45,226 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 02:16:45,233 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;@484a790b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 02:16:45,234 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 02:16:45,276 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13921 states, 13919 states have (on average 1.6697320209785185) internal successors, (23241), 13920 states have internal predecessors, (23241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:45,297 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 269
[2023-11-29 02:16:45,297 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:45,298 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]
[2023-11-29 02:16:45,299 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:45,308 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:45,308 INFO  L85        PathProgramCache]: Analyzing trace with hash -1454177851, now seen corresponding path program 1 times
[2023-11-29 02:16:45,317 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:45,318 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442911160]
[2023-11-29 02:16:45,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:45,319 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:46,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:47,241 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 02:16:47,241 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:47,242 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442911160]
[2023-11-29 02:16:47,242 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442911160] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:16:47,243 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:16:47,243 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:16:47,244 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683280312]
[2023-11-29 02:16:47,245 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:47,250 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:16:47,250 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:47,278 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:16:47,279 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:16:47,311 INFO  L87              Difference]: Start difference. First operand  has 13921 states, 13919 states have (on average 1.6697320209785185) internal successors, (23241), 13920 states have internal predecessors, (23241), 0 states have call successors, (0), 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 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:48,168 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:48,168 INFO  L93              Difference]: Finished difference Result 27532 states and 45968 transitions.
[2023-11-29 02:16:48,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:16:48,171 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 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 268
[2023-11-29 02:16:48,173 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:48,263 INFO  L225             Difference]: With dead ends: 27532
[2023-11-29 02:16:48,263 INFO  L226             Difference]: Without dead ends: 13921
[2023-11-29 02:16:48,285 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 02:16:48,289 INFO  L413           NwaCegarLoop]: 23234 mSDtfsCounter, 1 mSDsluCounter, 46463 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69697 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:48,290 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69697 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 02:16:48,338 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13921 states.
[2023-11-29 02:16:48,626 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13921 to 13921.
[2023-11-29 02:16:48,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13921 states, 13920 states have (on average 1.6694683908045977) internal successors, (23239), 13920 states have internal predecessors, (23239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:48,715 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 23239 transitions.
[2023-11-29 02:16:48,716 INFO  L78                 Accepts]: Start accepts. Automaton has 13921 states and 23239 transitions. Word has length 268
[2023-11-29 02:16:48,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:48,718 INFO  L495      AbstractCegarLoop]: Abstraction has 13921 states and 23239 transitions.
[2023-11-29 02:16:48,719 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:48,719 INFO  L276                IsEmpty]: Start isEmpty. Operand 13921 states and 23239 transitions.
[2023-11-29 02:16:48,725 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 270
[2023-11-29 02:16:48,725 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:48,726 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]
[2023-11-29 02:16:48,726 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 02:16:48,727 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:48,727 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:48,727 INFO  L85        PathProgramCache]: Analyzing trace with hash -2128113889, now seen corresponding path program 1 times
[2023-11-29 02:16:48,728 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:48,728 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776799078]
[2023-11-29 02:16:48,728 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:48,729 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:49,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:49,782 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 02:16:49,783 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:49,783 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776799078]
[2023-11-29 02:16:49,783 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776799078] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:16:49,783 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:16:49,784 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:16:49,784 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332062027]
[2023-11-29 02:16:49,784 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:49,786 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:16:49,786 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:49,787 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:16:49,787 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:16:49,788 INFO  L87              Difference]: Start difference. First operand 13921 states and 23239 transitions. Second operand  has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:50,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:50,696 INFO  L93              Difference]: Finished difference Result 27535 states and 45966 transitions.
[2023-11-29 02:16:50,697 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:16:50,697 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 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 269
[2023-11-29 02:16:50,699 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:50,767 INFO  L225             Difference]: With dead ends: 27535
[2023-11-29 02:16:50,768 INFO  L226             Difference]: Without dead ends: 13924
[2023-11-29 02:16:50,785 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 02:16:50,787 INFO  L413           NwaCegarLoop]: 23234 mSDtfsCounter, 1 mSDsluCounter, 46461 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69695 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:50,787 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69695 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 02:16:50,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13924 states.
[2023-11-29 02:16:51,043 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13924 to 13923.
[2023-11-29 02:16:51,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13923 states, 13922 states have (on average 1.669372216635541) internal successors, (23241), 13922 states have internal predecessors, (23241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:51,254 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13923 states to 13923 states and 23241 transitions.
[2023-11-29 02:16:51,254 INFO  L78                 Accepts]: Start accepts. Automaton has 13923 states and 23241 transitions. Word has length 269
[2023-11-29 02:16:51,256 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:51,256 INFO  L495      AbstractCegarLoop]: Abstraction has 13923 states and 23241 transitions.
[2023-11-29 02:16:51,257 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:51,257 INFO  L276                IsEmpty]: Start isEmpty. Operand 13923 states and 23241 transitions.
[2023-11-29 02:16:51,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 271
[2023-11-29 02:16:51,261 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:51,261 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]
[2023-11-29 02:16:51,261 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 02:16:51,262 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:51,262 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:51,262 INFO  L85        PathProgramCache]: Analyzing trace with hash -1757452001, now seen corresponding path program 1 times
[2023-11-29 02:16:51,263 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:51,263 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379920635]
[2023-11-29 02:16:51,263 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:51,264 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:51,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:52,109 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:16:52,109 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:52,110 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379920635]
[2023-11-29 02:16:52,110 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379920635] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:16:52,110 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:16:52,110 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:16:52,110 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834422327]
[2023-11-29 02:16:52,111 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:52,111 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:16:52,111 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:52,112 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:16:52,112 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:16:52,113 INFO  L87              Difference]: Start difference. First operand 13923 states and 23241 transitions. Second operand  has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:52,810 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:52,810 INFO  L93              Difference]: Finished difference Result 41139 states and 68676 transitions.
[2023-11-29 02:16:52,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:16:52,810 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 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 270
[2023-11-29 02:16:52,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:52,861 INFO  L225             Difference]: With dead ends: 41139
[2023-11-29 02:16:52,861 INFO  L226             Difference]: Without dead ends: 27526
[2023-11-29 02:16:52,880 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 02:16:52,881 INFO  L413           NwaCegarLoop]: 23365 mSDtfsCounter, 22707 mSDsluCounter, 46588 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22707 SdHoareTripleChecker+Valid, 69953 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:52,882 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22707 Valid, 69953 Invalid, 20 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 02:16:52,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27526 states.
[2023-11-29 02:16:53,178 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27526 to 13925.
[2023-11-29 02:16:53,198 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13925 states, 13924 states have (on average 1.6692760700948004) internal successors, (23243), 13924 states have internal predecessors, (23243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:53,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13925 states to 13925 states and 23243 transitions.
[2023-11-29 02:16:53,221 INFO  L78                 Accepts]: Start accepts. Automaton has 13925 states and 23243 transitions. Word has length 270
[2023-11-29 02:16:53,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:53,221 INFO  L495      AbstractCegarLoop]: Abstraction has 13925 states and 23243 transitions.
[2023-11-29 02:16:53,222 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:53,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 13925 states and 23243 transitions.
[2023-11-29 02:16:53,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 272
[2023-11-29 02:16:53,226 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:53,226 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]
[2023-11-29 02:16:53,226 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 02:16:53,227 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:53,227 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:53,227 INFO  L85        PathProgramCache]: Analyzing trace with hash -1734523133, now seen corresponding path program 1 times
[2023-11-29 02:16:53,227 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:53,228 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952581143]
[2023-11-29 02:16:53,228 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:53,228 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:53,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:54,282 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 02:16:54,282 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:54,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952581143]
[2023-11-29 02:16:54,283 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952581143] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:16:54,283 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:16:54,283 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-29 02:16:54,283 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766996331]
[2023-11-29 02:16:54,283 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:54,284 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:16:54,284 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:54,285 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:16:54,285 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:16:54,285 INFO  L87              Difference]: Start difference. First operand 13925 states and 23243 transitions. Second operand  has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:55,152 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:55,152 INFO  L93              Difference]: Finished difference Result 41226 states and 68817 transitions.
[2023-11-29 02:16:55,152 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:16:55,152 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 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 271
[2023-11-29 02:16:55,153 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:55,179 INFO  L225             Difference]: With dead ends: 41226
[2023-11-29 02:16:55,180 INFO  L226             Difference]: Without dead ends: 27611
[2023-11-29 02:16:55,195 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:16:55,196 INFO  L413           NwaCegarLoop]: 23360 mSDtfsCounter, 91246 mSDsluCounter, 69162 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91246 SdHoareTripleChecker+Valid, 92522 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:55,197 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [91246 Valid, 92522 Invalid, 33 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 02:16:55,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27611 states.
[2023-11-29 02:16:55,513 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27611 to 14006.
[2023-11-29 02:16:55,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6692609782220635) internal successors, (23378), 14005 states have internal predecessors, (23378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:55,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23378 transitions.
[2023-11-29 02:16:55,544 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23378 transitions. Word has length 271
[2023-11-29 02:16:55,545 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:55,545 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23378 transitions.
[2023-11-29 02:16:55,545 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:16:55,546 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23378 transitions.
[2023-11-29 02:16:56,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9259
[2023-11-29 02:16:56,122 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:56,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:56,127 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 02:16:56,128 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:56,128 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:56,131 INFO  L85        PathProgramCache]: Analyzing trace with hash 1593674159, now seen corresponding path program 1 times
[2023-11-29 02:16:56,131 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:56,131 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917075325]
[2023-11-29 02:16:56,132 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:56,132 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:57,491 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:16:57,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246717230]
[2023-11-29 02:16:57,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:57,494 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:16:57,494 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:16:57,496 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:16:57,499 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 02:17:30,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:17:31,308 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83103 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:17:31,636 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:17:32,997 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:17:32,998 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:17:32,998 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:17:32,998 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917075325]
[2023-11-29 02:17:32,998 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:17:32,998 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246717230]
[2023-11-29 02:17:32,999 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [246717230] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:17:32,999 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:17:33,001 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:17:33,002 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289949673]
[2023-11-29 02:17:33,002 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:17:33,015 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:17:33,015 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:17:33,025 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:17:33,025 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:17:33,029 INFO  L87              Difference]: Start difference. First operand 14006 states and 23378 transitions. Second operand  has 4 states, 4 states have (on average 2314.5) internal successors, (9258), 3 states have internal predecessors, (9258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:17:42,552 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:17:42,552 INFO  L93              Difference]: Finished difference Result 27704 states and 46240 transitions.
[2023-11-29 02:17:42,552 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:17:42,555 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2314.5) internal successors, (9258), 3 states have internal predecessors, (9258), 0 states have call successors, (0), 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 9258
[2023-11-29 02:17:42,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:17:42,569 INFO  L225             Difference]: With dead ends: 27704
[2023-11-29 02:17:42,570 INFO  L226             Difference]: Without dead ends: 14089
[2023-11-29 02:17:42,582 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9258 GetRequests, 9255 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 02:17:42,583 INFO  L413           NwaCegarLoop]: 16342 mSDtfsCounter, 45640 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 7344 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45640 SdHoareTripleChecker+Valid, 16947 SdHoareTripleChecker+Invalid, 7344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:17:42,584 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45640 Valid, 16947 Invalid, 7344 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7344 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time]
[2023-11-29 02:17:42,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14089 states.
[2023-11-29 02:17:42,732 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14089 to 14006.
[2023-11-29 02:17:42,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6691895751517316) internal successors, (23377), 14005 states have internal predecessors, (23377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:17:42,764 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23377 transitions.
[2023-11-29 02:17:42,764 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23377 transitions. Word has length 9258
[2023-11-29 02:17:42,766 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:17:42,767 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23377 transitions.
[2023-11-29 02:17:42,769 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2314.5) internal successors, (9258), 3 states have internal predecessors, (9258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:17:42,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23377 transitions.
[2023-11-29 02:17:43,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9260
[2023-11-29 02:17:43,214 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:17:43,218 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:43,419 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forcibly destroying the process
[2023-11-29 02:17:43,466 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 137
[2023-11-29 02:17:43,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:17:43,466 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:17:43,468 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:17:43,473 INFO  L85        PathProgramCache]: Analyzing trace with hash 899844549, now seen corresponding path program 1 times
[2023-11-29 02:17:43,473 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:17:43,473 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871213239]
[2023-11-29 02:17:43,475 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:43,475 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:17:44,788 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:17:44,789 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151868107]
[2023-11-29 02:17:44,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:44,791 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:17:44,791 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:17:44,792 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:17:44,794 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 02:18:17,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:18:18,157 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83104 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:18:18,362 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:18:19,619 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:18:19,619 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:18:19,619 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:18:19,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871213239]
[2023-11-29 02:18:19,620 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:18:19,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151868107]
[2023-11-29 02:18:19,620 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151868107] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:18:19,620 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:18:19,623 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:18:19,623 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225064967]
[2023-11-29 02:18:19,623 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:18:19,631 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:18:19,632 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:18:19,641 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:18:19,642 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:18:19,645 INFO  L87              Difference]: Start difference. First operand 14006 states and 23377 transitions. Second operand  has 4 states, 4 states have (on average 2314.75) internal successors, (9259), 3 states have internal predecessors, (9259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:18:28,872 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:18:28,872 INFO  L93              Difference]: Finished difference Result 27770 states and 46348 transitions.
[2023-11-29 02:18:28,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:18:28,874 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2314.75) internal successors, (9259), 3 states have internal predecessors, (9259), 0 states have call successors, (0), 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 9259
[2023-11-29 02:18:28,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:18:28,888 INFO  L225             Difference]: With dead ends: 27770
[2023-11-29 02:18:28,888 INFO  L226             Difference]: Without dead ends: 14155
[2023-11-29 02:18:28,896 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9259 GetRequests, 9256 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 02:18:28,897 INFO  L413           NwaCegarLoop]: 16440 mSDtfsCounter, 45595 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 7366 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45595 SdHoareTripleChecker+Valid, 17144 SdHoareTripleChecker+Invalid, 7366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time
[2023-11-29 02:18:28,897 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45595 Valid, 17144 Invalid, 7366 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7366 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time]
[2023-11-29 02:18:28,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14155 states.
[2023-11-29 02:18:29,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14155 to 14006.
[2023-11-29 02:18:29,049 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6691181720813995) internal successors, (23376), 14005 states have internal predecessors, (23376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:18:29,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23376 transitions.
[2023-11-29 02:18:29,068 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23376 transitions. Word has length 9259
[2023-11-29 02:18:29,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:18:29,071 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23376 transitions.
[2023-11-29 02:18:29,073 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2314.75) internal successors, (9259), 3 states have internal predecessors, (9259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:18:29,073 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23376 transitions.
[2023-11-29 02:18:29,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9261
[2023-11-29 02:18:29,535 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:18:29,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:29,740 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forcibly destroying the process
[2023-11-29 02:18:29,789 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 137
[2023-11-29 02:18:29,790 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:18:29,790 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:18:29,791 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:18:29,794 INFO  L85        PathProgramCache]: Analyzing trace with hash -15146334, now seen corresponding path program 1 times
[2023-11-29 02:18:29,794 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:18:29,794 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692268855]
[2023-11-29 02:18:29,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:29,796 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:18:31,114 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:18:31,114 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939214867]
[2023-11-29 02:18:31,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:31,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:18:31,117 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:18:31,118 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:18:31,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 02:19:03,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:19:04,242 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83105 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:19:04,567 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:19:05,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:19:05,630 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:19:05,630 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:19:05,630 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692268855]
[2023-11-29 02:19:05,631 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:19:05,631 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939214867]
[2023-11-29 02:19:05,631 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [939214867] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:19:05,631 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:19:05,633 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:19:05,633 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767296251]
[2023-11-29 02:19:05,633 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:19:05,640 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:19:05,640 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:19:05,647 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:19:05,647 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:19:05,649 INFO  L87              Difference]: Start difference. First operand 14006 states and 23376 transitions. Second operand  has 4 states, 4 states have (on average 2315.0) internal successors, (9260), 3 states have internal predecessors, (9260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:19:15,075 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:19:15,075 INFO  L93              Difference]: Finished difference Result 27836 states and 46456 transitions.
[2023-11-29 02:19:15,075 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:19:15,077 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2315.0) internal successors, (9260), 3 states have internal predecessors, (9260), 0 states have call successors, (0), 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 9260
[2023-11-29 02:19:15,077 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:19:15,089 INFO  L225             Difference]: With dead ends: 27836
[2023-11-29 02:19:15,089 INFO  L226             Difference]: Without dead ends: 14221
[2023-11-29 02:19:15,095 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9260 GetRequests, 9257 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 02:19:15,096 INFO  L413           NwaCegarLoop]: 16538 mSDtfsCounter, 45550 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 7388 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45550 SdHoareTripleChecker+Valid, 17341 SdHoareTripleChecker+Invalid, 7388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:19:15,097 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45550 Valid, 17341 Invalid, 7388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7388 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time]
[2023-11-29 02:19:15,111 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14221 states.
[2023-11-29 02:19:15,242 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14221 to 14006.
[2023-11-29 02:19:15,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6690467690110675) internal successors, (23375), 14005 states have internal predecessors, (23375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:19:15,271 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23375 transitions.
[2023-11-29 02:19:15,272 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23375 transitions. Word has length 9260
[2023-11-29 02:19:15,273 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:19:15,274 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23375 transitions.
[2023-11-29 02:19:15,275 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2315.0) internal successors, (9260), 3 states have internal predecessors, (9260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:19:15,275 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23375 transitions.
[2023-11-29 02:19:15,703 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9262
[2023-11-29 02:19:15,703 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:19:15,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:15,909 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forcibly destroying the process
[2023-11-29 02:19:15,954 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 137
[2023-11-29 02:19:15,955 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:19:15,955 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:19:15,955 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:19:15,958 INFO  L85        PathProgramCache]: Analyzing trace with hash 1013914456, now seen corresponding path program 1 times
[2023-11-29 02:19:15,959 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:19:15,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406715412]
[2023-11-29 02:19:15,959 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:15,959 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:19:17,140 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:19:17,140 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295986289]
[2023-11-29 02:19:17,142 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:17,142 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:19:17,142 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:19:17,143 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:19:17,145 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 02:19:52,424 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:19:53,020 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83106 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:19:53,239 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:19:54,407 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:19:54,407 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:19:54,407 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:19:54,407 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406715412]
[2023-11-29 02:19:54,407 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:19:54,407 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295986289]
[2023-11-29 02:19:54,407 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [295986289] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:19:54,407 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:19:54,410 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:19:54,410 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101775884]
[2023-11-29 02:19:54,410 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:19:54,417 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:19:54,418 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:19:54,424 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:19:54,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:19:54,426 INFO  L87              Difference]: Start difference. First operand 14006 states and 23375 transitions. Second operand  has 4 states, 4 states have (on average 2315.25) internal successors, (9261), 3 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:03,675 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:20:03,675 INFO  L93              Difference]: Finished difference Result 27902 states and 46564 transitions.
[2023-11-29 02:20:03,676 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:20:03,677 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2315.25) internal successors, (9261), 3 states have internal predecessors, (9261), 0 states have call successors, (0), 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 9261
[2023-11-29 02:20:03,678 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:20:03,692 INFO  L225             Difference]: With dead ends: 27902
[2023-11-29 02:20:03,692 INFO  L226             Difference]: Without dead ends: 14287
[2023-11-29 02:20:03,700 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9261 GetRequests, 9258 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 02:20:03,701 INFO  L413           NwaCegarLoop]: 16636 mSDtfsCounter, 45505 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 7410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45505 SdHoareTripleChecker+Valid, 17538 SdHoareTripleChecker+Invalid, 7410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time
[2023-11-29 02:20:03,701 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45505 Valid, 17538 Invalid, 7410 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7410 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time]
[2023-11-29 02:20:03,717 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14287 states.
[2023-11-29 02:20:03,831 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14287 to 14006.
[2023-11-29 02:20:03,844 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6689753659407354) internal successors, (23374), 14005 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:03,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23374 transitions.
[2023-11-29 02:20:03,862 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23374 transitions. Word has length 9261
[2023-11-29 02:20:03,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:20:03,864 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23374 transitions.
[2023-11-29 02:20:03,866 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2315.25) internal successors, (9261), 3 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:03,866 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23374 transitions.
[2023-11-29 02:20:04,292 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9263
[2023-11-29 02:20:04,292 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:20:04,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:04,500 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forcibly destroying the process
[2023-11-29 02:20:04,554 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 137
[2023-11-29 02:20:04,554 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:04,554 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:20:04,556 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:20:04,562 INFO  L85        PathProgramCache]: Analyzing trace with hash -217628907, now seen corresponding path program 1 times
[2023-11-29 02:20:04,562 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:20:04,562 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255123643]
[2023-11-29 02:20:04,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:04,564 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:20:05,856 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:20:05,856 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729364201]
[2023-11-29 02:20:05,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:05,858 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:05,858 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:20:05,859 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:20:05,861 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 02:20:40,204 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:20:40,840 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83107 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:20:41,038 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:20:42,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:20:42,620 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:20:42,620 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:20:42,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255123643]
[2023-11-29 02:20:42,620 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:20:42,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729364201]
[2023-11-29 02:20:42,620 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [729364201] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:20:42,620 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:20:42,623 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:20:42,623 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603648984]
[2023-11-29 02:20:42,623 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:20:42,630 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:20:42,630 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:20:42,637 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:20:42,637 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:20:42,639 INFO  L87              Difference]: Start difference. First operand 14006 states and 23374 transitions. Second operand  has 4 states, 4 states have (on average 2315.5) internal successors, (9262), 3 states have internal predecessors, (9262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:52,237 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:20:52,237 INFO  L93              Difference]: Finished difference Result 28079 states and 46858 transitions.
[2023-11-29 02:20:52,238 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:20:52,239 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2315.5) internal successors, (9262), 3 states have internal predecessors, (9262), 0 states have call successors, (0), 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 9262
[2023-11-29 02:20:52,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:20:52,252 INFO  L225             Difference]: With dead ends: 28079
[2023-11-29 02:20:52,252 INFO  L226             Difference]: Without dead ends: 14464
[2023-11-29 02:20:52,259 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9262 GetRequests, 9259 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 02:20:52,260 INFO  L413           NwaCegarLoop]: 16900 mSDtfsCounter, 45388 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 7472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45388 SdHoareTripleChecker+Valid, 18067 SdHoareTripleChecker+Invalid, 7472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:20:52,260 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45388 Valid, 18067 Invalid, 7472 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7472 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time]
[2023-11-29 02:20:52,279 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14464 states.
[2023-11-29 02:20:52,409 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14464 to 14006.
[2023-11-29 02:20:52,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6689039628704034) internal successors, (23373), 14005 states have internal predecessors, (23373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:52,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23373 transitions.
[2023-11-29 02:20:52,445 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23373 transitions. Word has length 9262
[2023-11-29 02:20:52,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:20:52,447 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23373 transitions.
[2023-11-29 02:20:52,449 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2315.5) internal successors, (9262), 3 states have internal predecessors, (9262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:20:52,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23373 transitions.
[2023-11-29 02:20:52,878 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9264
[2023-11-29 02:20:52,878 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:20:52,882 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:53,082 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process
[2023-11-29 02:20:53,142 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137
[2023-11-29 02:20:53,142 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:53,142 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:20:53,143 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:20:53,149 INFO  L85        PathProgramCache]: Analyzing trace with hash -2112260252, now seen corresponding path program 1 times
[2023-11-29 02:20:53,149 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:20:53,149 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056926845]
[2023-11-29 02:20:53,152 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:53,152 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:20:54,408 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:20:54,408 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653818878]
[2023-11-29 02:20:54,410 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:54,410 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:54,410 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:20:54,411 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:20:54,414 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 02:21:28,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:21:28,895 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83108 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:21:29,085 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:21:30,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:21:30,841 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:21:30,841 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:21:30,841 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056926845]
[2023-11-29 02:21:30,841 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:21:30,841 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653818878]
[2023-11-29 02:21:30,841 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653818878] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:21:30,841 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:21:30,844 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:21:30,845 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262272797]
[2023-11-29 02:21:30,845 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:21:30,851 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:21:30,851 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:21:30,857 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:21:30,858 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:21:30,860 INFO  L87              Difference]: Start difference. First operand 14006 states and 23373 transitions. Second operand  has 4 states, 4 states have (on average 2315.75) internal successors, (9263), 3 states have internal predecessors, (9263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:21:40,944 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:21:40,944 INFO  L93              Difference]: Finished difference Result 28261 states and 47161 transitions.
[2023-11-29 02:21:40,944 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:21:40,946 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2315.75) internal successors, (9263), 3 states have internal predecessors, (9263), 0 states have call successors, (0), 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 9263
[2023-11-29 02:21:40,947 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:21:40,959 INFO  L225             Difference]: With dead ends: 28261
[2023-11-29 02:21:40,959 INFO  L226             Difference]: Without dead ends: 14646
[2023-11-29 02:21:40,968 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9263 GetRequests, 9260 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 02:21:40,969 INFO  L413           NwaCegarLoop]: 17174 mSDtfsCounter, 45269 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 7532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45269 SdHoareTripleChecker+Valid, 18616 SdHoareTripleChecker+Invalid, 7532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time
[2023-11-29 02:21:40,969 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45269 Valid, 18616 Invalid, 7532 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7532 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time]
[2023-11-29 02:21:40,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14646 states.
[2023-11-29 02:21:41,125 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14646 to 14006.
[2023-11-29 02:21:41,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6688325598000715) internal successors, (23372), 14005 states have internal predecessors, (23372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:21:41,155 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23372 transitions.
[2023-11-29 02:21:41,156 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23372 transitions. Word has length 9263
[2023-11-29 02:21:41,158 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:21:41,159 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23372 transitions.
[2023-11-29 02:21:41,161 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2315.75) internal successors, (9263), 3 states have internal predecessors, (9263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:21:41,161 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23372 transitions.
[2023-11-29 02:21:41,578 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9265
[2023-11-29 02:21:41,579 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:21:41,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:41,782 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process
[2023-11-29 02:21:41,835 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 137
[2023-11-29 02:21:41,836 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:21:41,836 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:21:41,837 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:21:41,840 INFO  L85        PathProgramCache]: Analyzing trace with hash -1314208847, now seen corresponding path program 1 times
[2023-11-29 02:21:41,840 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:21:41,840 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825647269]
[2023-11-29 02:21:41,841 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:21:41,841 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:21:43,224 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:21:43,225 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773886978]
[2023-11-29 02:21:43,227 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:21:43,227 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:21:43,227 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:21:43,228 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:21:43,233 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 02:22:20,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:22:21,309 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83109 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:22:21,613 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:22:23,847 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:22:23,847 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:22:23,848 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:22:23,848 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825647269]
[2023-11-29 02:22:23,848 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:22:23,848 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773886978]
[2023-11-29 02:22:23,848 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [773886978] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:22:23,848 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:22:23,851 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:22:23,852 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260162148]
[2023-11-29 02:22:23,852 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:22:23,858 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:22:23,859 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:22:23,866 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:22:23,866 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:22:23,869 INFO  L87              Difference]: Start difference. First operand 14006 states and 23372 transitions. Second operand  has 4 states, 4 states have (on average 2316.0) internal successors, (9264), 3 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:22:33,747 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:22:33,747 INFO  L93              Difference]: Finished difference Result 28380 states and 47358 transitions.
[2023-11-29 02:22:33,748 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:22:33,749 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2316.0) internal successors, (9264), 3 states have internal predecessors, (9264), 0 states have call successors, (0), 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 9264
[2023-11-29 02:22:33,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:22:33,760 INFO  L225             Difference]: With dead ends: 28380
[2023-11-29 02:22:33,760 INFO  L226             Difference]: Without dead ends: 14765
[2023-11-29 02:22:33,765 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9264 GetRequests, 9261 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 02:22:33,766 INFO  L413           NwaCegarLoop]: 17352 mSDtfsCounter, 45190 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 7572 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45190 SdHoareTripleChecker+Valid, 18973 SdHoareTripleChecker+Invalid, 7572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time
[2023-11-29 02:22:33,766 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45190 Valid, 18973 Invalid, 7572 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7572 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time]
[2023-11-29 02:22:33,781 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14765 states.
[2023-11-29 02:22:33,882 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14765 to 14006.
[2023-11-29 02:22:33,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6687611567297393) internal successors, (23371), 14005 states have internal predecessors, (23371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:22:33,913 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23371 transitions.
[2023-11-29 02:22:33,913 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23371 transitions. Word has length 9264
[2023-11-29 02:22:33,914 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:22:33,914 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23371 transitions.
[2023-11-29 02:22:33,915 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2316.0) internal successors, (9264), 3 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:22:33,915 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23371 transitions.
[2023-11-29 02:22:34,314 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9266
[2023-11-29 02:22:34,314 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:22:34,316 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:34,516 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process
[2023-11-29 02:22:34,578 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 137
[2023-11-29 02:22:34,579 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:22:34,579 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:22:34,580 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:22:34,582 INFO  L85        PathProgramCache]: Analyzing trace with hash 2072770407, now seen corresponding path program 1 times
[2023-11-29 02:22:34,582 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:22:34,582 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532635375]
[2023-11-29 02:22:34,583 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:22:34,583 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:22:35,893 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:22:35,893 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954142371]
[2023-11-29 02:22:35,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:22:35,896 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:22:35,896 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:22:35,897 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:22:35,899 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 02:23:10,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:23:11,039 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83110 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:23:11,287 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:23:14,300 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:23:14,300 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:23:14,300 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:23:14,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532635375]
[2023-11-29 02:23:14,301 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:23:14,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954142371]
[2023-11-29 02:23:14,301 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [954142371] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:23:14,301 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:23:14,303 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:23:14,303 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832894022]
[2023-11-29 02:23:14,303 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:23:14,309 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:23:14,309 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:23:14,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:23:14,318 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:23:14,321 INFO  L87              Difference]: Start difference. First operand 14006 states and 23371 transitions. Second operand  has 4 states, 4 states have (on average 2316.25) internal successors, (9265), 3 states have internal predecessors, (9265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:23:24,520 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:23:24,520 INFO  L93              Difference]: Finished difference Result 28911 states and 48241 transitions.
[2023-11-29 02:23:24,520 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:23:24,522 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2316.25) internal successors, (9265), 3 states have internal predecessors, (9265), 0 states have call successors, (0), 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 9265
[2023-11-29 02:23:24,523 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:23:24,535 INFO  L225             Difference]: With dead ends: 28911
[2023-11-29 02:23:24,535 INFO  L226             Difference]: Without dead ends: 15296
[2023-11-29 02:23:24,541 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9265 GetRequests, 9262 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 02:23:24,542 INFO  L413           NwaCegarLoop]: 17966 mSDtfsCounter, 44835 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 8112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44835 SdHoareTripleChecker+Valid, 20202 SdHoareTripleChecker+Invalid, 8112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time
[2023-11-29 02:23:24,542 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44835 Valid, 20202 Invalid, 8112 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8112 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time]
[2023-11-29 02:23:24,559 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15296 states.
[2023-11-29 02:23:24,670 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15296 to 14006.
[2023-11-29 02:23:24,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6686897536594074) internal successors, (23370), 14005 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:23:24,701 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23370 transitions.
[2023-11-29 02:23:24,701 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23370 transitions. Word has length 9265
[2023-11-29 02:23:24,702 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:23:24,702 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23370 transitions.
[2023-11-29 02:23:24,704 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2316.25) internal successors, (9265), 3 states have internal predecessors, (9265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:23:24,704 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23370 transitions.
[2023-11-29 02:23:25,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9267
[2023-11-29 02:23:25,144 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:23:25,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:25,346 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process
[2023-11-29 02:23:25,408 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 137
[2023-11-29 02:23:25,409 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 02:23:25,409 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:23:25,410 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:23:25,412 INFO  L85        PathProgramCache]: Analyzing trace with hash -13453406, now seen corresponding path program 1 times
[2023-11-29 02:23:25,413 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:23:25,413 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173215244]
[2023-11-29 02:23:25,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:23:25,414 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:23:26,734 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:23:26,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592184879]
[2023-11-29 02:23:26,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:23:26,737 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:23:26,737 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:23:26,738 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:23:26,739 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 02:24:00,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:24:01,015 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83111 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:24:01,194 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:24:04,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:24:04,805 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:24:04,805 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:24:04,805 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173215244]
[2023-11-29 02:24:04,805 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:24:04,805 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592184879]
[2023-11-29 02:24:04,805 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [592184879] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:24:04,805 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:24:04,808 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:24:04,808 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503121060]
[2023-11-29 02:24:04,808 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:24:04,813 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:24:04,813 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:24:04,818 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:24:04,818 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:24:04,821 INFO  L87              Difference]: Start difference. First operand 14006 states and 23370 transitions. Second operand  has 4 states, 4 states have (on average 2316.5) internal successors, (9266), 3 states have internal predecessors, (9266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:24:14,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:24:14,739 INFO  L93              Difference]: Finished difference Result 28915 states and 48245 transitions.
[2023-11-29 02:24:14,740 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:24:14,743 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2316.5) internal successors, (9266), 3 states have internal predecessors, (9266), 0 states have call successors, (0), 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 9266
[2023-11-29 02:24:14,744 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:24:14,757 INFO  L225             Difference]: With dead ends: 28915
[2023-11-29 02:24:14,758 INFO  L226             Difference]: Without dead ends: 15300
[2023-11-29 02:24:14,766 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9266 GetRequests, 9263 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 02:24:14,767 INFO  L413           NwaCegarLoop]: 17970 mSDtfsCounter, 44830 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 8114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44830 SdHoareTripleChecker+Valid, 20211 SdHoareTripleChecker+Invalid, 8114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time
[2023-11-29 02:24:14,767 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44830 Valid, 20211 Invalid, 8114 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8114 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time]
[2023-11-29 02:24:14,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15300 states.
[2023-11-29 02:24:14,904 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15300 to 14006.
[2023-11-29 02:24:14,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6686183505890753) internal successors, (23369), 14005 states have internal predecessors, (23369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:24:14,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23369 transitions.
[2023-11-29 02:24:14,936 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23369 transitions. Word has length 9266
[2023-11-29 02:24:14,937 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:24:14,937 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23369 transitions.
[2023-11-29 02:24:14,939 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2316.5) internal successors, (9266), 3 states have internal predecessors, (9266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:24:14,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23369 transitions.
[2023-11-29 02:24:15,371 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9268
[2023-11-29 02:24:15,371 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:24:15,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:15,573 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forcibly destroying the process
[2023-11-29 02:24:15,635 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 137
[2023-11-29 02:24:15,636 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 02:24:15,636 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:24:15,638 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:24:15,639 INFO  L85        PathProgramCache]: Analyzing trace with hash 1124809276, now seen corresponding path program 1 times
[2023-11-29 02:24:15,640 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:24:15,640 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876590445]
[2023-11-29 02:24:15,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:24:15,641 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:24:17,074 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:24:17,075 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474766117]
[2023-11-29 02:24:17,077 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:24:17,078 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:24:17,078 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:24:17,079 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:24:17,080 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 02:24:52,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:24:52,790 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83112 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:24:53,060 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:24:57,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:24:57,676 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:24:57,676 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:24:57,676 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876590445]
[2023-11-29 02:24:57,676 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:24:57,677 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474766117]
[2023-11-29 02:24:57,677 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [474766117] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:24:57,677 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:24:57,680 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:24:57,680 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653198230]
[2023-11-29 02:24:57,680 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:24:57,686 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:24:57,686 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:24:57,691 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:24:57,691 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:24:57,693 INFO  L87              Difference]: Start difference. First operand 14006 states and 23369 transitions. Second operand  has 4 states, 4 states have (on average 2316.75) internal successors, (9267), 3 states have internal predecessors, (9267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:25:08,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:25:08,839 INFO  L93              Difference]: Finished difference Result 29387 states and 49029 transitions.
[2023-11-29 02:25:08,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:25:08,841 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2316.75) internal successors, (9267), 3 states have internal predecessors, (9267), 0 states have call successors, (0), 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 9267
[2023-11-29 02:25:08,842 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:25:08,853 INFO  L225             Difference]: With dead ends: 29387
[2023-11-29 02:25:08,853 INFO  L226             Difference]: Without dead ends: 15772
[2023-11-29 02:25:08,857 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9267 GetRequests, 9264 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 02:25:08,858 INFO  L413           NwaCegarLoop]: 18495 mSDtfsCounter, 44513 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 8634 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44513 SdHoareTripleChecker+Valid, 21262 SdHoareTripleChecker+Invalid, 8634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time
[2023-11-29 02:25:08,858 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44513 Valid, 21262 Invalid, 8634 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8634 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time]
[2023-11-29 02:25:08,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15772 states.
[2023-11-29 02:25:08,991 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15772 to 14006.
[2023-11-29 02:25:09,003 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6685469475187433) internal successors, (23368), 14005 states have internal predecessors, (23368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:25:09,022 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23368 transitions.
[2023-11-29 02:25:09,022 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23368 transitions. Word has length 9267
[2023-11-29 02:25:09,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:25:09,023 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23368 transitions.
[2023-11-29 02:25:09,025 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2316.75) internal successors, (9267), 3 states have internal predecessors, (9267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:25:09,025 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23368 transitions.
[2023-11-29 02:25:09,446 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9269
[2023-11-29 02:25:09,446 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:25:09,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:09,648 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process
[2023-11-29 02:25:09,706 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 137
[2023-11-29 02:25:09,707 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 02:25:09,707 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:25:09,707 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:25:09,709 INFO  L85        PathProgramCache]: Analyzing trace with hash 494749551, now seen corresponding path program 1 times
[2023-11-29 02:25:09,709 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:25:09,710 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508696182]
[2023-11-29 02:25:09,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:25:09,711 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:25:11,066 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:25:11,066 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639798860]
[2023-11-29 02:25:11,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:25:11,068 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:25:11,068 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:25:11,069 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:25:11,071 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 02:25:46,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:25:47,482 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83113 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:25:47,770 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:25:52,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:25:52,529 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:25:52,529 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:25:52,529 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508696182]
[2023-11-29 02:25:52,529 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:25:52,530 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639798860]
[2023-11-29 02:25:52,530 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639798860] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:25:52,530 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:25:52,532 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:25:52,532 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914323581]
[2023-11-29 02:25:52,532 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:25:52,537 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:25:52,537 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:25:52,542 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:25:52,542 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:25:52,545 INFO  L87              Difference]: Start difference. First operand 14006 states and 23368 transitions. Second operand  has 4 states, 4 states have (on average 2317.0) internal successors, (9268), 3 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:03,166 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:26:03,166 INFO  L93              Difference]: Finished difference Result 29391 states and 49033 transitions.
[2023-11-29 02:26:03,168 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:26:03,170 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2317.0) internal successors, (9268), 3 states have internal predecessors, (9268), 0 states have call successors, (0), 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 9268
[2023-11-29 02:26:03,171 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:26:03,183 INFO  L225             Difference]: With dead ends: 29391
[2023-11-29 02:26:03,184 INFO  L226             Difference]: Without dead ends: 15776
[2023-11-29 02:26:03,191 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9268 GetRequests, 9265 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 02:26:03,191 INFO  L413           NwaCegarLoop]: 18499 mSDtfsCounter, 44508 mSDsluCounter, 2772 mSDsCounter, 0 mSdLazyCounter, 8636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44508 SdHoareTripleChecker+Valid, 21271 SdHoareTripleChecker+Invalid, 8636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:26:03,192 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44508 Valid, 21271 Invalid, 8636 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8636 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time]
[2023-11-29 02:26:03,208 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15776 states.
[2023-11-29 02:26:03,312 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15776 to 14006.
[2023-11-29 02:26:03,324 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6684755444484112) internal successors, (23367), 14005 states have internal predecessors, (23367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:03,341 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23367 transitions.
[2023-11-29 02:26:03,341 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23367 transitions. Word has length 9268
[2023-11-29 02:26:03,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:26:03,342 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23367 transitions.
[2023-11-29 02:26:03,344 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2317.0) internal successors, (9268), 3 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:03,344 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23367 transitions.
[2023-11-29 02:26:03,748 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9270
[2023-11-29 02:26:03,748 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:26:03,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:03,951 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forcibly destroying the process
[2023-11-29 02:26:04,001 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 137
[2023-11-29 02:26:04,001 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 02:26:04,001 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:26:04,003 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:26:04,005 INFO  L85        PathProgramCache]: Analyzing trace with hash 848961937, now seen corresponding path program 1 times
[2023-11-29 02:26:04,005 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:26:04,006 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776064288]
[2023-11-29 02:26:04,007 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:26:04,007 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:26:05,245 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:26:05,246 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076854020]
[2023-11-29 02:26:05,247 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:26:05,247 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:26:05,247 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:26:05,248 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:26:05,249 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 02:26:39,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:26:40,065 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83114 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:26:40,234 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:26:45,055 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:26:45,055 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:26:45,055 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:26:45,055 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776064288]
[2023-11-29 02:26:45,056 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:26:45,056 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076854020]
[2023-11-29 02:26:45,056 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076854020] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:26:45,056 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:26:45,059 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:26:45,059 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284927755]
[2023-11-29 02:26:45,059 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:26:45,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:26:45,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:26:45,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:26:45,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:26:45,072 INFO  L87              Difference]: Start difference. First operand 14006 states and 23367 transitions. Second operand  has 4 states, 4 states have (on average 2317.25) internal successors, (9269), 3 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:55,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:26:55,569 INFO  L93              Difference]: Finished difference Result 29629 states and 49427 transitions.
[2023-11-29 02:26:55,569 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:26:55,571 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2317.25) internal successors, (9269), 3 states have internal predecessors, (9269), 0 states have call successors, (0), 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 9269
[2023-11-29 02:26:55,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:26:55,581 INFO  L225             Difference]: With dead ends: 29629
[2023-11-29 02:26:55,581 INFO  L226             Difference]: Without dead ends: 16014
[2023-11-29 02:26:55,584 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9269 GetRequests, 9266 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 02:26:55,585 INFO  L413           NwaCegarLoop]: 18764 mSDtfsCounter, 44347 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 8896 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44347 SdHoareTripleChecker+Valid, 21802 SdHoareTripleChecker+Invalid, 8896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:26:55,585 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44347 Valid, 21802 Invalid, 8896 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8896 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time]
[2023-11-29 02:26:55,599 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16014 states.
[2023-11-29 02:26:55,691 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 14006.
[2023-11-29 02:26:55,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6684041413780792) internal successors, (23366), 14005 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:55,718 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23366 transitions.
[2023-11-29 02:26:55,719 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23366 transitions. Word has length 9269
[2023-11-29 02:26:55,720 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:26:55,720 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23366 transitions.
[2023-11-29 02:26:55,721 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2317.25) internal successors, (9269), 3 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:26:55,721 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23366 transitions.
[2023-11-29 02:26:56,126 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9271
[2023-11-29 02:26:56,126 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:26:56,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:56,328 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forcibly destroying the process
[2023-11-29 02:26:56,371 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 137
[2023-11-29 02:26:56,371 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 02:26:56,371 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:26:56,372 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:26:56,374 INFO  L85        PathProgramCache]: Analyzing trace with hash 1490507472, now seen corresponding path program 1 times
[2023-11-29 02:26:56,374 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:26:56,374 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468777078]
[2023-11-29 02:26:56,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:26:56,377 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:26:57,539 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:26:57,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409145528]
[2023-11-29 02:26:57,541 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:26:57,541 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:26:57,541 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:26:57,542 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:26:57,544 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 02:27:30,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:27:31,139 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83115 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:27:31,294 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:27:35,720 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:27:35,720 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:27:35,720 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:27:35,721 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468777078]
[2023-11-29 02:27:35,721 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:27:35,721 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409145528]
[2023-11-29 02:27:35,721 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [409145528] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:27:35,721 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:27:35,724 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:27:35,724 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200865448]
[2023-11-29 02:27:35,724 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:27:35,729 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:27:35,729 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:27:35,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:27:35,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:27:35,737 INFO  L87              Difference]: Start difference. First operand 14006 states and 23366 transitions. Second operand  has 4 states, 4 states have (on average 2317.5) internal successors, (9270), 3 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:27:46,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:27:46,493 INFO  L93              Difference]: Finished difference Result 29633 states and 49431 transitions.
[2023-11-29 02:27:46,494 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:27:46,496 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2317.5) internal successors, (9270), 3 states have internal predecessors, (9270), 0 states have call successors, (0), 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 9270
[2023-11-29 02:27:46,497 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:27:46,506 INFO  L225             Difference]: With dead ends: 29633
[2023-11-29 02:27:46,506 INFO  L226             Difference]: Without dead ends: 16018
[2023-11-29 02:27:46,510 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9270 GetRequests, 9267 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 02:27:46,510 INFO  L413           NwaCegarLoop]: 18768 mSDtfsCounter, 44342 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 8898 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44342 SdHoareTripleChecker+Valid, 21811 SdHoareTripleChecker+Invalid, 8898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time
[2023-11-29 02:27:46,511 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44342 Valid, 21811 Invalid, 8898 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8898 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time]
[2023-11-29 02:27:46,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16018 states.
[2023-11-29 02:27:46,624 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16018 to 14006.
[2023-11-29 02:27:46,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6683327383077473) internal successors, (23365), 14005 states have internal predecessors, (23365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:27:46,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23365 transitions.
[2023-11-29 02:27:46,654 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23365 transitions. Word has length 9270
[2023-11-29 02:27:46,655 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:27:46,655 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23365 transitions.
[2023-11-29 02:27:46,657 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2317.5) internal successors, (9270), 3 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:27:46,657 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23365 transitions.
[2023-11-29 02:27:47,067 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9272
[2023-11-29 02:27:47,067 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:27:47,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:47,269 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process
[2023-11-29 02:27:47,315 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 137
[2023-11-29 02:27:47,315 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 02:27:47,315 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:27:47,316 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:27:47,318 INFO  L85        PathProgramCache]: Analyzing trace with hash -756322714, now seen corresponding path program 1 times
[2023-11-29 02:27:47,319 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:27:47,319 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898983954]
[2023-11-29 02:27:47,321 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:27:47,321 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:27:48,510 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:27:48,510 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69637301]
[2023-11-29 02:27:48,512 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:27:48,512 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:27:48,512 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:27:48,513 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:27:48,514 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 02:28:20,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:28:21,274 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83116 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 02:28:21,426 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:28:27,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:28:27,097 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:28:27,097 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:28:27,097 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898983954]
[2023-11-29 02:28:27,097 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:28:27,097 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69637301]
[2023-11-29 02:28:27,097 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [69637301] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:28:27,097 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:28:27,100 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 02:28:27,100 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144809529]
[2023-11-29 02:28:27,100 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:28:27,105 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:28:27,105 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:28:27,109 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:28:27,109 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:28:27,111 INFO  L87              Difference]: Start difference. First operand 14006 states and 23365 transitions. Second operand  has 4 states, 4 states have (on average 2317.75) internal successors, (9271), 3 states have internal predecessors, (9271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:28:38,193 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:28:38,193 INFO  L93              Difference]: Finished difference Result 30105 states and 50215 transitions.
[2023-11-29 02:28:38,193 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:28:38,195 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2317.75) internal successors, (9271), 3 states have internal predecessors, (9271), 0 states have call successors, (0), 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 9271
[2023-11-29 02:28:38,197 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:28:38,210 INFO  L225             Difference]: With dead ends: 30105
[2023-11-29 02:28:38,210 INFO  L226             Difference]: Without dead ends: 16490
[2023-11-29 02:28:38,218 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9271 GetRequests, 9268 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 02:28:38,218 INFO  L413           NwaCegarLoop]: 19293 mSDtfsCounter, 44025 mSDsluCounter, 3569 mSDsCounter, 0 mSdLazyCounter, 9418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44025 SdHoareTripleChecker+Valid, 22862 SdHoareTripleChecker+Invalid, 9418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:28:38,219 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44025 Valid, 22862 Invalid, 9418 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9418 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time]
[2023-11-29 02:28:38,240 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16490 states.
[2023-11-29 02:28:38,345 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16490 to 14006.
[2023-11-29 02:28:38,357 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14006 states, 14005 states have (on average 1.6682613352374152) internal successors, (23364), 14005 states have internal predecessors, (23364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:28:38,374 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 23364 transitions.
[2023-11-29 02:28:38,374 INFO  L78                 Accepts]: Start accepts. Automaton has 14006 states and 23364 transitions. Word has length 9271
[2023-11-29 02:28:38,375 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:28:38,375 INFO  L495      AbstractCegarLoop]: Abstraction has 14006 states and 23364 transitions.
[2023-11-29 02:28:38,377 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2317.75) internal successors, (9271), 3 states have internal predecessors, (9271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:28:38,377 INFO  L276                IsEmpty]: Start isEmpty. Operand 14006 states and 23364 transitions.
[2023-11-29 02:28:38,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9273
[2023-11-29 02:28:38,783 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:28:38,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:38,985 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process
[2023-11-29 02:28:39,026 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 137
[2023-11-29 02:28:39,027 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 02:28:39,027 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:28:39,028 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:28:39,031 INFO  L85        PathProgramCache]: Analyzing trace with hash 676152221, now seen corresponding path program 1 times
[2023-11-29 02:28:39,031 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:28:39,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18316741]
[2023-11-29 02:28:39,033 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:28:39,033 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:28:40,288 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:28:40,289 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529808464]
[2023-11-29 02:28:40,290 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:28:40,290 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:28:40,291 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:28:40,291 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:28:40,292 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_febe2071-6d1f-42c3-905c-f0dea63652b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process