./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash def143aefc8eff5ee57b60d4cd67817bcbac6eae78dff7f75900f22f16b842d9
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:20:24,104 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:20:24,242 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:20:24,251 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:20:24,252 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:20:24,292 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:20:24,293 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:20:24,294 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:20:24,295 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:20:24,300 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:20:24,301 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:20:24,302 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:20:24,302 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:20:24,304 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:20:24,305 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:20:24,305 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:20:24,306 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:20:24,306 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:20:24,307 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:20:24,307 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:20:24,308 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:20:24,308 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:20:24,309 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:20:24,310 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:20:24,310 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:20:24,311 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:20:24,311 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:20:24,311 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:20:24,312 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:20:24,312 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:20:24,314 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:20:24,314 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:20:24,314 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:20:24,315 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:20:24,315 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:20:24,315 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:20:24,315 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_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> def143aefc8eff5ee57b60d4cd67817bcbac6eae78dff7f75900f22f16b842d9
[2023-11-06 22:20:24,586 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:20:24,613 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:20:24,616 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:20:24,617 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:20:24,618 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:20:24,620 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c
[2023-11-06 22:20:27,722 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:20:28,335 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:20:28,336 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c
[2023-11-06 22:20:28,393 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/data/d8c083bf9/a72e9ec7eef3498bb8d5c936677c208b/FLAG1398692f3
[2023-11-06 22:20:28,411 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/data/d8c083bf9/a72e9ec7eef3498bb8d5c936677c208b
[2023-11-06 22:20:28,417 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:20:28,419 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:20:28,423 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:20:28,424 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:20:28,430 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:20:28,431 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:28" (1/1) ...
[2023-11-06 22:20:28,432 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27446705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:28, skipping insertion in model container
[2023-11-06 22:20:28,432 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:28" (1/1) ...
[2023-11-06 22:20:28,709 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:20:29,061 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_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c[1177,1190]
[2023-11-06 22:20:30,553 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:20:30,564 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:20:30,577 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_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.7.prop2-back-serstep.c[1177,1190]
[2023-11-06 22:20:31,529 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:20:31,558 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:20:31,559 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31 WrapperNode
[2023-11-06 22:20:31,559 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:20:31,560 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:20:31,561 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:20:31,561 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:20:31,569 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:31,967 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:36,369 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34583
[2023-11-06 22:20:36,370 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:20:36,373 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:20:36,373 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:20:36,373 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:20:36,403 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:36,403 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:37,295 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:37,296 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:38,468 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:38,602 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:38,733 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:38,860 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:39,465 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:20:39,471 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:20:39,471 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:20:39,471 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:20:39,472 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (1/1) ...
[2023-11-06 22:20:39,479 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:20:39,490 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:20:39,508 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:20:39,541 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:20:39,553 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:20:39,554 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:20:39,555 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:20:39,555 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:20:41,534 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:20:41,536 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:21:02,923 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:21:02,989 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:21:02,990 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:21:02,998 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:02 BoogieIcfgContainer
[2023-11-06 22:21:02,998 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:21:03,001 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:21:03,002 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:21:03,005 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:21:03,005 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:20:28" (1/3) ...
[2023-11-06 22:21:03,006 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bbde90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:03, skipping insertion in model container
[2023-11-06 22:21:03,006 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:31" (2/3) ...
[2023-11-06 22:21:03,007 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bbde90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:03, skipping insertion in model container
[2023-11-06 22:21:03,007 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:02" (3/3) ...
[2023-11-06 22:21:03,008 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cambridge.7.prop2-back-serstep.c
[2023-11-06 22:21:03,029 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:21:03,030 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:21:03,223 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:21:03,233 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e239251, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:21:03,234 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:21:03,266 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 7162 states, 7160 states have (on average 1.670391061452514) internal successors, (11960), 7161 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:03,328 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 588
[2023-11-06 22:21:03,328 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:03,330 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:21:03,331 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:03,337 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:03,338 INFO  L85        PathProgramCache]: Analyzing trace with hash 146408002, now seen corresponding path program 1 times
[2023-11-06 22:21:03,348 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:03,350 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035155127]
[2023-11-06 22:21:03,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:03,351 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:04,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:07,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:07,485 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:07,486 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035155127]
[2023-11-06 22:21:07,487 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035155127] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:07,487 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:07,488 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:21:07,490 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664073506]
[2023-11-06 22:21:07,491 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:07,502 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:21:07,503 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:07,549 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:21:07,550 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:07,590 INFO  L87              Difference]: Start difference. First operand  has 7162 states, 7160 states have (on average 1.670391061452514) internal successors, (11960), 7161 states have internal predecessors, (11960), 0 states have call successors, (0), 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 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:08,244 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:08,245 INFO  L93              Difference]: Finished difference Result 14095 states and 23543 transitions.
[2023-11-06 22:21:08,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:21:08,249 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 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 587
[2023-11-06 22:21:08,256 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:08,329 INFO  L225             Difference]: With dead ends: 14095
[2023-11-06 22:21:08,330 INFO  L226             Difference]: Without dead ends: 7160
[2023-11-06 22:21:08,351 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:08,356 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 1 mSDsluCounter, 23898 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35850 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:08,357 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35850 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:08,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7160 states.
[2023-11-06 22:21:08,597 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 7160.
[2023-11-06 22:21:08,616 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7160 states, 7159 states have (on average 1.6700656516273222) internal successors, (11956), 7159 states have internal predecessors, (11956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:08,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 11956 transitions.
[2023-11-06 22:21:08,646 INFO  L78                 Accepts]: Start accepts. Automaton has 7160 states and 11956 transitions. Word has length 587
[2023-11-06 22:21:08,650 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:08,650 INFO  L495      AbstractCegarLoop]: Abstraction has 7160 states and 11956 transitions.
[2023-11-06 22:21:08,651 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:08,651 INFO  L276                IsEmpty]: Start isEmpty. Operand 7160 states and 11956 transitions.
[2023-11-06 22:21:08,665 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 589
[2023-11-06 22:21:08,666 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:08,666 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:21:08,667 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:21:08,667 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:08,668 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:08,668 INFO  L85        PathProgramCache]: Analyzing trace with hash 245409206, now seen corresponding path program 1 times
[2023-11-06 22:21:08,669 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:08,669 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469514736]
[2023-11-06 22:21:08,669 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:08,670 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:09,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:10,512 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:10,513 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:10,514 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469514736]
[2023-11-06 22:21:10,514 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469514736] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:10,514 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:10,514 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:21:10,515 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148077336]
[2023-11-06 22:21:10,515 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:10,519 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:21:10,519 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:10,520 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:21:10,521 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:10,521 INFO  L87              Difference]: Start difference. First operand 7160 states and 11956 transitions. Second operand  has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:10,920 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:10,920 INFO  L93              Difference]: Finished difference Result 14096 states and 23539 transitions.
[2023-11-06 22:21:10,921 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:21:10,922 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 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 588
[2023-11-06 22:21:10,924 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:10,963 INFO  L225             Difference]: With dead ends: 14096
[2023-11-06 22:21:10,963 INFO  L226             Difference]: Without dead ends: 7163
[2023-11-06 22:21:10,976 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:10,979 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 1 mSDsluCounter, 23895 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35847 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:10,980 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35847 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:10,998 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7163 states.
[2023-11-06 22:21:11,134 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 7162.
[2023-11-06 22:21:11,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7162 states, 7161 states have (on average 1.669878508588186) internal successors, (11958), 7161 states have internal predecessors, (11958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:11,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 11958 transitions.
[2023-11-06 22:21:11,180 INFO  L78                 Accepts]: Start accepts. Automaton has 7162 states and 11958 transitions. Word has length 588
[2023-11-06 22:21:11,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:11,182 INFO  L495      AbstractCegarLoop]: Abstraction has 7162 states and 11958 transitions.
[2023-11-06 22:21:11,183 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:11,183 INFO  L276                IsEmpty]: Start isEmpty. Operand 7162 states and 11958 transitions.
[2023-11-06 22:21:11,197 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 590
[2023-11-06 22:21:11,197 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:11,198 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:21:11,198 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:21:11,198 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:11,199 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:11,199 INFO  L85        PathProgramCache]: Analyzing trace with hash 582329182, now seen corresponding path program 1 times
[2023-11-06 22:21:11,200 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:11,200 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859161160]
[2023-11-06 22:21:11,200 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:11,200 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:11,677 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:13,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:13,334 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:13,334 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859161160]
[2023-11-06 22:21:13,334 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859161160] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:13,335 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:13,335 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:21:13,336 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194243821]
[2023-11-06 22:21:13,336 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:13,337 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:21:13,337 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:13,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:21:13,339 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:21:13,348 INFO  L87              Difference]: Start difference. First operand 7162 states and 11958 transitions. Second operand  has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:14,133 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:14,133 INFO  L93              Difference]: Finished difference Result 21667 states and 36180 transitions.
[2023-11-06 22:21:14,134 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:21:14,135 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 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 589
[2023-11-06 22:21:14,137 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:14,216 INFO  L225             Difference]: With dead ends: 21667
[2023-11-06 22:21:14,217 INFO  L226             Difference]: Without dead ends: 14732
[2023-11-06 22:21:14,231 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:21:14,236 INFO  L413           NwaCegarLoop]: 13021 mSDtfsCounter, 47151 mSDsluCounter, 23897 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47151 SdHoareTripleChecker+Valid, 36918 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:14,238 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [47151 Valid, 36918 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:14,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14732 states.
[2023-11-06 22:21:14,462 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 7806.
[2023-11-06 22:21:14,476 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7806 states, 7805 states have (on average 1.66944266495836) internal successors, (13030), 7805 states have internal predecessors, (13030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:14,501 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7806 states to 7806 states and 13030 transitions.
[2023-11-06 22:21:14,502 INFO  L78                 Accepts]: Start accepts. Automaton has 7806 states and 13030 transitions. Word has length 589
[2023-11-06 22:21:14,503 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:14,503 INFO  L495      AbstractCegarLoop]: Abstraction has 7806 states and 13030 transitions.
[2023-11-06 22:21:14,505 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:14,508 INFO  L276                IsEmpty]: Start isEmpty. Operand 7806 states and 13030 transitions.
[2023-11-06 22:21:15,185 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:21:15,185 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:15,189 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:21:15,191 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:21:15,191 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:15,192 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:15,195 INFO  L85        PathProgramCache]: Analyzing trace with hash 774974152, now seen corresponding path program 1 times
[2023-11-06 22:21:15,196 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:15,202 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242695553]
[2023-11-06 22:21:15,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:15,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:16,165 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:21:16,165 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823179103]
[2023-11-06 22:21:16,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:16,167 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:16,168 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:21:16,175 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:21:16,186 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:21:26,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:27,203 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30623 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:21:27,394 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:21:27,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:27,679 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:21:27,679 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:27,679 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242695553]
[2023-11-06 22:21:27,679 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:21:27,679 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823179103]
[2023-11-06 22:21:27,680 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [823179103] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:27,680 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:27,681 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:21:27,682 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843219496]
[2023-11-06 22:21:27,682 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:27,689 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:21:27,689 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:27,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:21:27,696 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:27,699 INFO  L87              Difference]: Start difference. First operand 7806 states and 13030 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:28,284 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:28,285 INFO  L93              Difference]: Finished difference Result 14751 states and 24627 transitions.
[2023-11-06 22:21:28,285 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:21:28,288 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:21:28,289 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:28,303 INFO  L225             Difference]: With dead ends: 14751
[2023-11-06 22:21:28,303 INFO  L226             Difference]: Without dead ends: 7816
[2023-11-06 22:21:28,311 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:28,319 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:28,320 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:28,338 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7816 states.
[2023-11-06 22:21:28,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7816 to 7808.
[2023-11-06 22:21:28,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7808 states, 7807 states have (on average 1.6692711669014986) internal successors, (13032), 7807 states have internal predecessors, (13032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:28,514 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 13032 transitions.
[2023-11-06 22:21:28,514 INFO  L78                 Accepts]: Start accepts. Automaton has 7808 states and 13032 transitions. Word has length 5066
[2023-11-06 22:21:28,518 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:28,518 INFO  L495      AbstractCegarLoop]: Abstraction has 7808 states and 13032 transitions.
[2023-11-06 22:21:28,520 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:28,521 INFO  L276                IsEmpty]: Start isEmpty. Operand 7808 states and 13032 transitions.
[2023-11-06 22:21:28,698 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:21:28,699 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:28,705 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:21:28,818 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:21:28,921 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:28,922 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:28,922 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:28,925 INFO  L85        PathProgramCache]: Analyzing trace with hash -480641606, now seen corresponding path program 1 times
[2023-11-06 22:21:28,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:28,925 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711028286]
[2023-11-06 22:21:28,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:28,926 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:29,847 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:21:29,847 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635086506]
[2023-11-06 22:21:29,849 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:29,849 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:29,850 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:21:29,851 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:21:29,868 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:21:39,900 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:40,110 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30624 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:21:40,233 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:21:40,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:40,518 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:21:40,518 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:40,518 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711028286]
[2023-11-06 22:21:40,518 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:21:40,519 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635086506]
[2023-11-06 22:21:40,519 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635086506] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:40,519 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:40,520 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:21:40,520 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254366508]
[2023-11-06 22:21:40,521 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:40,527 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:21:40,527 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:40,534 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:21:40,534 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:40,537 INFO  L87              Difference]: Start difference. First operand 7808 states and 13032 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:40,860 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:40,860 INFO  L93              Difference]: Finished difference Result 14754 states and 24629 transitions.
[2023-11-06 22:21:40,861 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:21:40,863 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:21:40,865 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:40,881 INFO  L225             Difference]: With dead ends: 14754
[2023-11-06 22:21:40,881 INFO  L226             Difference]: Without dead ends: 7817
[2023-11-06 22:21:40,891 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:40,892 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:40,893 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:40,905 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7817 states.
[2023-11-06 22:21:41,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7809.
[2023-11-06 22:21:41,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7809 states, 7808 states have (on average 1.6691854508196722) internal successors, (13033), 7808 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:41,054 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 13033 transitions.
[2023-11-06 22:21:41,054 INFO  L78                 Accepts]: Start accepts. Automaton has 7809 states and 13033 transitions. Word has length 5066
[2023-11-06 22:21:41,057 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:41,057 INFO  L495      AbstractCegarLoop]: Abstraction has 7809 states and 13033 transitions.
[2023-11-06 22:21:41,059 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:41,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 7809 states and 13033 transitions.
[2023-11-06 22:21:41,300 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:21:41,301 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:41,305 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:21:41,400 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:21:41,532 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:41,532 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:41,533 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:41,534 INFO  L85        PathProgramCache]: Analyzing trace with hash -1803408468, now seen corresponding path program 1 times
[2023-11-06 22:21:41,535 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:41,535 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632104780]
[2023-11-06 22:21:41,536 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:41,536 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:42,347 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:21:42,347 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303914490]
[2023-11-06 22:21:42,576 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:42,577 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:42,577 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:21:42,578 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:21:42,600 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:21:52,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:21:52,830 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30625 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:21:52,925 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:21:53,104 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:21:53,104 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:21:53,104 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:21:53,104 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632104780]
[2023-11-06 22:21:53,105 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:21:53,105 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303914490]
[2023-11-06 22:21:53,105 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [303914490] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:21:53,105 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:21:53,106 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:21:53,107 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165186350]
[2023-11-06 22:21:53,107 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:21:53,114 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:21:53,114 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:21:53,120 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:21:53,120 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:53,123 INFO  L87              Difference]: Start difference. First operand 7809 states and 13033 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:53,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:21:53,427 INFO  L93              Difference]: Finished difference Result 14756 states and 24631 transitions.
[2023-11-06 22:21:53,427 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:21:53,429 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:21:53,432 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:21:53,447 INFO  L225             Difference]: With dead ends: 14756
[2023-11-06 22:21:53,447 INFO  L226             Difference]: Without dead ends: 7818
[2023-11-06 22:21:53,456 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:21:53,457 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:21:53,458 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:21:53,470 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7818 states.
[2023-11-06 22:21:53,577 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7818 to 7810.
[2023-11-06 22:21:53,589 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7810 states, 7809 states have (on average 1.6690997566909975) internal successors, (13034), 7809 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:53,609 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 13034 transitions.
[2023-11-06 22:21:53,609 INFO  L78                 Accepts]: Start accepts. Automaton has 7810 states and 13034 transitions. Word has length 5066
[2023-11-06 22:21:53,612 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:21:53,613 INFO  L495      AbstractCegarLoop]: Abstraction has 7810 states and 13034 transitions.
[2023-11-06 22:21:53,615 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:21:53,615 INFO  L276                IsEmpty]: Start isEmpty. Operand 7810 states and 13034 transitions.
[2023-11-06 22:21:53,931 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:21:53,931 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:21:53,936 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:21:54,048 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:21:54,168 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 22:21:54,169 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:21:54,169 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:21:54,171 INFO  L85        PathProgramCache]: Analyzing trace with hash -646739170, now seen corresponding path program 1 times
[2023-11-06 22:21:54,171 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:21:54,172 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103928710]
[2023-11-06 22:21:54,172 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:54,173 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:21:54,821 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:21:54,821 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475114844]
[2023-11-06 22:21:54,823 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:21:54,823 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:21:54,824 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:21:54,837 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:21:54,856 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:22:04,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:04,740 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30626 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:04,824 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:05,107 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:05,107 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:05,108 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:05,108 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103928710]
[2023-11-06 22:22:05,108 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:05,108 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475114844]
[2023-11-06 22:22:05,108 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [475114844] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:05,108 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:05,110 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:05,110 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266261176]
[2023-11-06 22:22:05,110 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:05,117 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:05,117 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:05,124 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:05,124 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:05,126 INFO  L87              Difference]: Start difference. First operand 7810 states and 13034 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:05,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:05,409 INFO  L93              Difference]: Finished difference Result 14758 states and 24633 transitions.
[2023-11-06 22:22:05,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:05,411 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:22:05,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:05,430 INFO  L225             Difference]: With dead ends: 14758
[2023-11-06 22:22:05,430 INFO  L226             Difference]: Without dead ends: 7819
[2023-11-06 22:22:05,439 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:05,440 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:05,441 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:05,452 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7819 states.
[2023-11-06 22:22:05,559 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7819 to 7811.
[2023-11-06 22:22:05,571 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7811 states, 7810 states have (on average 1.6690140845070423) internal successors, (13035), 7810 states have internal predecessors, (13035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:05,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7811 states to 7811 states and 13035 transitions.
[2023-11-06 22:22:05,590 INFO  L78                 Accepts]: Start accepts. Automaton has 7811 states and 13035 transitions. Word has length 5066
[2023-11-06 22:22:05,594 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:05,594 INFO  L495      AbstractCegarLoop]: Abstraction has 7811 states and 13035 transitions.
[2023-11-06 22:22:05,596 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:05,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 7811 states and 13035 transitions.
[2023-11-06 22:22:05,838 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:22:05,838 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:05,842 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:05,948 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:06,068 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-06 22:22:06,068 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:06,069 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:06,070 INFO  L85        PathProgramCache]: Analyzing trace with hash -1406728468, now seen corresponding path program 1 times
[2023-11-06 22:22:06,070 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:06,070 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758486090]
[2023-11-06 22:22:06,071 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:06,071 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:06,655 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:06,655 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333771900]
[2023-11-06 22:22:06,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:06,657 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:06,658 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:06,659 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:06,680 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:22:16,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:16,693 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30627 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:16,843 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:17,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:17,001 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:17,002 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:17,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758486090]
[2023-11-06 22:22:17,002 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:17,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333771900]
[2023-11-06 22:22:17,002 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [333771900] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:17,002 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:17,004 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:17,004 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436366302]
[2023-11-06 22:22:17,004 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:17,010 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:17,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:17,017 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:17,017 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:17,019 INFO  L87              Difference]: Start difference. First operand 7811 states and 13035 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:17,262 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:17,262 INFO  L93              Difference]: Finished difference Result 14760 states and 24635 transitions.
[2023-11-06 22:22:17,263 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:17,265 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:22:17,270 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:17,290 INFO  L225             Difference]: With dead ends: 14760
[2023-11-06 22:22:17,290 INFO  L226             Difference]: Without dead ends: 7820
[2023-11-06 22:22:17,299 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:17,300 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:17,301 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:17,312 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7820 states.
[2023-11-06 22:22:17,416 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7820 to 7812.
[2023-11-06 22:22:17,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7812 states, 7811 states have (on average 1.6689284342593778) internal successors, (13036), 7811 states have internal predecessors, (13036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:17,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 13036 transitions.
[2023-11-06 22:22:17,445 INFO  L78                 Accepts]: Start accepts. Automaton has 7812 states and 13036 transitions. Word has length 5066
[2023-11-06 22:22:17,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:17,450 INFO  L495      AbstractCegarLoop]: Abstraction has 7812 states and 13036 transitions.
[2023-11-06 22:22:17,451 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:17,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 7812 states and 13036 transitions.
[2023-11-06 22:22:17,738 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:22:17,738 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:17,741 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:17,821 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:17,942 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-06 22:22:17,942 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:17,942 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:17,944 INFO  L85        PathProgramCache]: Analyzing trace with hash -1188239174, now seen corresponding path program 1 times
[2023-11-06 22:22:17,944 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:17,944 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302693372]
[2023-11-06 22:22:17,945 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:17,945 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:18,605 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:18,605 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549556612]
[2023-11-06 22:22:18,607 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:18,607 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:18,607 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:18,612 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:18,616 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:22:28,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:28,640 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30628 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:28,718 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:28,913 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:28,913 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:28,913 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:28,914 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302693372]
[2023-11-06 22:22:28,914 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:28,914 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549556612]
[2023-11-06 22:22:28,914 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549556612] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:28,914 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:28,916 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:28,916 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310565899]
[2023-11-06 22:22:28,916 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:28,922 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:28,922 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:28,928 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:28,929 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:28,932 INFO  L87              Difference]: Start difference. First operand 7812 states and 13036 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:29,263 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:29,263 INFO  L93              Difference]: Finished difference Result 14762 states and 24637 transitions.
[2023-11-06 22:22:29,264 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:29,265 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:22:29,271 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:29,283 INFO  L225             Difference]: With dead ends: 14762
[2023-11-06 22:22:29,283 INFO  L226             Difference]: Without dead ends: 7821
[2023-11-06 22:22:29,291 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:29,292 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:29,292 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:29,303 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7821 states.
[2023-11-06 22:22:29,403 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7821 to 7813.
[2023-11-06 22:22:29,413 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7813 states, 7812 states have (on average 1.6688428059395801) internal successors, (13037), 7812 states have internal predecessors, (13037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:29,430 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 13037 transitions.
[2023-11-06 22:22:29,431 INFO  L78                 Accepts]: Start accepts. Automaton has 7813 states and 13037 transitions. Word has length 5066
[2023-11-06 22:22:29,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:29,436 INFO  L495      AbstractCegarLoop]: Abstraction has 7813 states and 13037 transitions.
[2023-11-06 22:22:29,437 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:29,438 INFO  L276                IsEmpty]: Start isEmpty. Operand 7813 states and 13037 transitions.
[2023-11-06 22:22:29,647 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:22:29,647 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:29,650 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:29,727 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:29,850 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:29,851 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:29,851 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:29,853 INFO  L85        PathProgramCache]: Analyzing trace with hash -1810546260, now seen corresponding path program 1 times
[2023-11-06 22:22:29,853 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:29,853 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49705683]
[2023-11-06 22:22:29,854 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:29,854 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:30,379 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:30,379 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891775773]
[2023-11-06 22:22:30,381 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:30,381 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:30,381 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:30,383 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:30,388 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:22:39,986 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:40,199 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30629 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:40,388 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:40,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:40,597 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:40,597 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:40,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49705683]
[2023-11-06 22:22:40,597 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:40,598 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891775773]
[2023-11-06 22:22:40,598 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891775773] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:40,598 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:40,599 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:40,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117197049]
[2023-11-06 22:22:40,600 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:40,606 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:40,606 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:40,613 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:40,613 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:40,615 INFO  L87              Difference]: Start difference. First operand 7813 states and 13037 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:40,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:40,862 INFO  L93              Difference]: Finished difference Result 14764 states and 24639 transitions.
[2023-11-06 22:22:40,862 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:40,864 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:22:40,869 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:40,882 INFO  L225             Difference]: With dead ends: 14764
[2023-11-06 22:22:40,883 INFO  L226             Difference]: Without dead ends: 7822
[2023-11-06 22:22:40,889 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:40,890 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:40,891 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:40,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7822 states.
[2023-11-06 22:22:40,994 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 7814.
[2023-11-06 22:22:41,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7814 states, 7813 states have (on average 1.6687571995392294) internal successors, (13038), 7813 states have internal predecessors, (13038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:41,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 13038 transitions.
[2023-11-06 22:22:41,021 INFO  L78                 Accepts]: Start accepts. Automaton has 7814 states and 13038 transitions. Word has length 5066
[2023-11-06 22:22:41,025 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:41,025 INFO  L495      AbstractCegarLoop]: Abstraction has 7814 states and 13038 transitions.
[2023-11-06 22:22:41,027 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:41,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 7814 states and 13038 transitions.
[2023-11-06 22:22:41,275 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:22:41,275 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:41,279 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:41,383 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:41,492 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:22:41,492 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:41,493 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:41,496 INFO  L85        PathProgramCache]: Analyzing trace with hash -886612322, now seen corresponding path program 1 times
[2023-11-06 22:22:41,496 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:41,496 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24955832]
[2023-11-06 22:22:41,497 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:41,498 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:42,105 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:42,106 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113466225]
[2023-11-06 22:22:42,107 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:42,107 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:42,108 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:42,126 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:42,148 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:22:51,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:52,011 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30630 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:52,085 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:52,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:52,248 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:52,248 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:52,248 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24955832]
[2023-11-06 22:22:52,249 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:52,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113466225]
[2023-11-06 22:22:52,249 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113466225] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:52,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:52,250 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:52,251 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186355734]
[2023-11-06 22:22:52,251 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:52,256 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:52,257 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:52,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:52,263 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:52,266 INFO  L87              Difference]: Start difference. First operand 7814 states and 13038 transitions. Second operand  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:52,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:52,507 INFO  L93              Difference]: Finished difference Result 14766 states and 24641 transitions.
[2023-11-06 22:22:52,508 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:52,510 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 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 5066
[2023-11-06 22:22:52,514 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:52,528 INFO  L225             Difference]: With dead ends: 14766
[2023-11-06 22:22:52,528 INFO  L226             Difference]: Without dead ends: 7823
[2023-11-06 22:22:52,682 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5065 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:52,682 INFO  L413           NwaCegarLoop]: 11952 mSDtfsCounter, 12 mSDsluCounter, 23892 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35844 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:52,683 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35844 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:52,709 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7823 states.
[2023-11-06 22:22:52,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7823 to 7815.
[2023-11-06 22:22:52,803 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7815 states, 7814 states have (on average 1.6686716150499104) internal successors, (13039), 7814 states have internal predecessors, (13039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:52,819 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 13039 transitions.
[2023-11-06 22:22:52,820 INFO  L78                 Accepts]: Start accepts. Automaton has 7815 states and 13039 transitions. Word has length 5066
[2023-11-06 22:22:52,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:52,823 INFO  L495      AbstractCegarLoop]: Abstraction has 7815 states and 13039 transitions.
[2023-11-06 22:22:52,824 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1266.5) internal successors, (5066), 4 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:52,824 INFO  L276                IsEmpty]: Start isEmpty. Operand 7815 states and 13039 transitions.
[2023-11-06 22:22:52,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5067
[2023-11-06 22:22:52,951 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:52,953 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:53,032 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:53,168 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:53,168 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:53,169 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:53,170 INFO  L85        PathProgramCache]: Analyzing trace with hash 570348944, now seen corresponding path program 1 times
[2023-11-06 22:22:53,171 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:53,171 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17052703]
[2023-11-06 22:22:53,172 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:53,172 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:53,774 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:53,774 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463758218]
[2023-11-06 22:22:53,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:53,776 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:53,776 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:53,777 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:53,795 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:23:03,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:03,635 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30631 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:03,766 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:04,304 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked.
[2023-11-06 22:23:04,304 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:04,305 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:04,305 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17052703]
[2023-11-06 22:23:04,305 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:04,305 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463758218]
[2023-11-06 22:23:04,305 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463758218] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:04,305 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:04,307 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:23:04,307 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989684067]
[2023-11-06 22:23:04,307 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:04,313 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:23:04,313 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:04,319 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:23:04,320 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:23:04,321 INFO  L87              Difference]: Start difference. First operand 7815 states and 13039 transitions. Second operand  has 7 states, 7 states have (on average 662.7142857142857) internal successors, (4639), 7 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:05,117 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:05,117 INFO  L93              Difference]: Finished difference Result 21700 states and 36213 transitions.
[2023-11-06 22:23:05,118 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:05,119 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 662.7142857142857) internal successors, (4639), 7 states have internal predecessors, (4639), 0 states have call successors, (0), 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 5066
[2023-11-06 22:23:05,126 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:05,147 INFO  L225             Difference]: With dead ends: 21700
[2023-11-06 22:23:05,147 INFO  L226             Difference]: Without dead ends: 14756
[2023-11-06 22:23:05,155 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5075 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:23:05,157 INFO  L413           NwaCegarLoop]: 13019 mSDtfsCounter, 33875 mSDsluCounter, 50988 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33875 SdHoareTripleChecker+Valid, 64007 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:05,157 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33875 Valid, 64007 Invalid, 46 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:05,265 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14756 states.
[2023-11-06 22:23:05,383 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14756 to 7815.
[2023-11-06 22:23:05,392 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7815 states, 7814 states have (on average 1.6686716150499104) internal successors, (13039), 7814 states have internal predecessors, (13039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:05,409 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 13039 transitions.
[2023-11-06 22:23:05,409 INFO  L78                 Accepts]: Start accepts. Automaton has 7815 states and 13039 transitions. Word has length 5066
[2023-11-06 22:23:05,412 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:05,413 INFO  L495      AbstractCegarLoop]: Abstraction has 7815 states and 13039 transitions.
[2023-11-06 22:23:05,414 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 662.7142857142857) internal successors, (4639), 7 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:05,414 INFO  L276                IsEmpty]: Start isEmpty. Operand 7815 states and 13039 transitions.
[2023-11-06 22:23:05,545 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5068
[2023-11-06 22:23:05,545 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:05,547 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1]
[2023-11-06 22:23:05,640 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:05,771 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:05,771 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:05,772 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:05,773 INFO  L85        PathProgramCache]: Analyzing trace with hash 390245036, now seen corresponding path program 1 times
[2023-11-06 22:23:05,773 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:05,774 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998841486]
[2023-11-06 22:23:05,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:05,774 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:06,371 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:06,371 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104026245]
[2023-11-06 22:23:06,372 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:06,373 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:06,373 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:06,378 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:06,379 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 22:23:16,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:16,203 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30634 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:16,309 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:16,697 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked.
[2023-11-06 22:23:16,698 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:16,698 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:16,698 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998841486]
[2023-11-06 22:23:16,698 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:16,698 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104026245]
[2023-11-06 22:23:16,699 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104026245] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:16,699 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:16,700 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:23:16,700 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795600164]
[2023-11-06 22:23:16,700 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:16,706 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:23:16,706 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:16,712 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:23:16,713 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:23:16,714 INFO  L87              Difference]: Start difference. First operand 7815 states and 13039 transitions. Second operand  has 7 states, 7 states have (on average 663.1428571428571) internal successors, (4642), 7 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:17,406 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:17,406 INFO  L93              Difference]: Finished difference Result 21702 states and 36215 transitions.
[2023-11-06 22:23:17,406 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:17,407 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 663.1428571428571) internal successors, (4642), 7 states have internal predecessors, (4642), 0 states have call successors, (0), 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 5067
[2023-11-06 22:23:17,413 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:17,434 INFO  L225             Difference]: With dead ends: 21702
[2023-11-06 22:23:17,435 INFO  L226             Difference]: Without dead ends: 14755
[2023-11-06 22:23:17,443 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5076 GetRequests, 5064 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:23:17,443 INFO  L413           NwaCegarLoop]: 13014 mSDtfsCounter, 33874 mSDsluCounter, 50972 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33874 SdHoareTripleChecker+Valid, 63986 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:17,444 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33874 Valid, 63986 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:17,461 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14755 states.
[2023-11-06 22:23:17,591 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 7817.
[2023-11-06 22:23:17,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7817 states, 7816 states have (on average 1.6685005117707268) internal successors, (13041), 7816 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:17,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7817 states to 7817 states and 13041 transitions.
[2023-11-06 22:23:17,617 INFO  L78                 Accepts]: Start accepts. Automaton has 7817 states and 13041 transitions. Word has length 5067
[2023-11-06 22:23:17,620 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:17,620 INFO  L495      AbstractCegarLoop]: Abstraction has 7817 states and 13041 transitions.
[2023-11-06 22:23:17,621 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 663.1428571428571) internal successors, (4642), 7 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:17,621 INFO  L276                IsEmpty]: Start isEmpty. Operand 7817 states and 13041 transitions.
[2023-11-06 22:23:17,845 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5069
[2023-11-06 22:23:17,845 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:17,848 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1]
[2023-11-06 22:23:17,958 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:18,076 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:18,076 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:18,077 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:18,079 INFO  L85        PathProgramCache]: Analyzing trace with hash -986105430, now seen corresponding path program 1 times
[2023-11-06 22:23:18,079 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:18,079 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24194242]
[2023-11-06 22:23:18,080 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:18,080 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:18,730 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:18,730 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043549582]
[2023-11-06 22:23:18,732 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:18,732 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:18,732 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:18,735 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:18,752 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 22:23:28,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:28,539 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30637 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:23:28,620 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:29,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked.
[2023-11-06 22:23:29,075 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:29,075 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:29,075 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24194242]
[2023-11-06 22:23:29,076 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:29,076 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043549582]
[2023-11-06 22:23:29,076 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043549582] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:29,076 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:29,077 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:23:29,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25985875]
[2023-11-06 22:23:29,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:29,083 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:23:29,084 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:29,089 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:23:29,090 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:23:29,091 INFO  L87              Difference]: Start difference. First operand 7817 states and 13041 transitions. Second operand  has 8 states, 8 states have (on average 580.625) internal successors, (4645), 8 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:29,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:29,813 INFO  L93              Difference]: Finished difference Result 21708 states and 36221 transitions.
[2023-11-06 22:23:29,813 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:29,814 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 580.625) internal successors, (4645), 8 states have internal predecessors, (4645), 0 states have call successors, (0), 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 5068
[2023-11-06 22:23:29,818 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:29,837 INFO  L225             Difference]: With dead ends: 21708
[2023-11-06 22:23:29,837 INFO  L226             Difference]: Without dead ends: 14756
[2023-11-06 22:23:29,847 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5077 GetRequests, 5064 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:23:29,847 INFO  L413           NwaCegarLoop]: 13009 mSDtfsCounter, 33873 mSDsluCounter, 63962 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33873 SdHoareTripleChecker+Valid, 76971 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:29,848 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33873 Valid, 76971 Invalid, 58 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:29,866 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14756 states.
[2023-11-06 22:23:29,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14756 to 7819.
[2023-11-06 22:23:29,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7819 states, 7818 states have (on average 1.6683294960347914) internal successors, (13043), 7818 states have internal predecessors, (13043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:30,017 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 13043 transitions.
[2023-11-06 22:23:30,017 INFO  L78                 Accepts]: Start accepts. Automaton has 7819 states and 13043 transitions. Word has length 5068
[2023-11-06 22:23:30,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:30,021 INFO  L495      AbstractCegarLoop]: Abstraction has 7819 states and 13043 transitions.
[2023-11-06 22:23:30,023 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 580.625) internal successors, (4645), 8 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:30,023 INFO  L276                IsEmpty]: Start isEmpty. Operand 7819 states and 13043 transitions.
[2023-11-06 22:23:30,206 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5070
[2023-11-06 22:23:30,206 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:30,208 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:23:30,289 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-06 22:23:30,409 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 22:23:30,409 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:30,410 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:30,411 INFO  L85        PathProgramCache]: Analyzing trace with hash -964506734, now seen corresponding path program 1 times
[2023-11-06 22:23:30,412 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:30,412 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875220005]
[2023-11-06 22:23:30,412 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:30,412 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:30,917 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:30,917 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635389765]
[2023-11-06 22:23:30,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:30,919 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:30,919 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:30,920 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:30,944 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 22:23:40,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:40,823 INFO  L262         TraceCheckSpWp]: Trace formula consists of 30640 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:40,909 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:41,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 434 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked.
[2023-11-06 22:23:41,306 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:41,306 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:41,306 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875220005]
[2023-11-06 22:23:41,307 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:41,307 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635389765]
[2023-11-06 22:23:41,307 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635389765] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:41,307 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:41,308 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:23:41,309 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158465703]
[2023-11-06 22:23:41,309 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:41,315 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:23:41,315 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:41,331 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:23:41,331 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:23:41,333 INFO  L87              Difference]: Start difference. First operand 7819 states and 13043 transitions. Second operand  has 7 states, 7 states have (on average 664.0) internal successors, (4648), 7 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:41,843 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:41,843 INFO  L93              Difference]: Finished difference Result 21714 states and 36227 transitions.
[2023-11-06 22:23:41,843 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:41,844 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 664.0) internal successors, (4648), 7 states have internal predecessors, (4648), 0 states have call successors, (0), 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 5069
[2023-11-06 22:23:41,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:41,870 INFO  L225             Difference]: With dead ends: 21714
[2023-11-06 22:23:41,870 INFO  L226             Difference]: Without dead ends: 14757
[2023-11-06 22:23:41,879 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5078 GetRequests, 5066 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:23:41,880 INFO  L413           NwaCegarLoop]: 13004 mSDtfsCounter, 33872 mSDsluCounter, 50942 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33872 SdHoareTripleChecker+Valid, 63946 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:41,880 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33872 Valid, 63946 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:41,897 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14757 states.
[2023-11-06 22:23:42,019 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 7821.
[2023-11-06 22:23:42,027 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7821 states, 7820 states have (on average 1.668158567774936) internal successors, (13045), 7820 states have internal predecessors, (13045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:42,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 13045 transitions.
[2023-11-06 22:23:42,042 INFO  L78                 Accepts]: Start accepts. Automaton has 7821 states and 13045 transitions. Word has length 5069
[2023-11-06 22:23:42,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:42,046 INFO  L495      AbstractCegarLoop]: Abstraction has 7821 states and 13045 transitions.
[2023-11-06 22:23:42,047 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 664.0) internal successors, (4648), 7 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:42,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 7821 states and 13045 transitions.
[2023-11-06 22:23:42,270 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5071
[2023-11-06 22:23:42,271 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:42,274 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:42,381 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:42,490 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 22:23:42,490 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:42,491 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:42,492 INFO  L85        PathProgramCache]: Analyzing trace with hash -1204838586, now seen corresponding path program 1 times
[2023-11-06 22:23:42,493 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:42,493 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060626307]
[2023-11-06 22:23:42,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:42,494 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:43,043 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:43,043 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918132627]
[2023-11-06 22:23:43,045 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:43,045 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:43,045 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:43,046 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:43,072 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a59e1a6-04ed-40f9-9037-1ce50bd909a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process