./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label08.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 9bd2c7ff
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_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 899879f260002e812b1d004dc9c25ad25c70810b966f965026df3bae657ec5ab
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-9bd2c7f
[2023-11-19 07:59:05,231 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-19 07:59:05,348 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-19 07:59:05,359 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-19 07:59:05,360 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-19 07:59:05,399 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-19 07:59:05,400 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-19 07:59:05,400 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-19 07:59:05,401 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-19 07:59:05,403 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-19 07:59:05,405 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-19 07:59:05,405 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-19 07:59:05,406 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-19 07:59:05,411 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-19 07:59:05,411 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-19 07:59:05,412 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-19 07:59:05,412 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-19 07:59:05,413 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-19 07:59:05,413 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-19 07:59:05,414 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-19 07:59:05,414 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-19 07:59:05,415 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-19 07:59:05,415 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-19 07:59:05,416 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-19 07:59:05,416 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-19 07:59:05,417 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-19 07:59:05,418 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-19 07:59:05,418 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-19 07:59:05,419 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:59:05,419 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-19 07:59:05,420 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-19 07:59:05,428 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-19 07:59:05,428 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-19 07:59:05,429 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-19 07:59:05,429 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-19 07:59:05,429 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-19 07:59:05,430 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-19 07:59:05,430 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-19 07:59:05,430 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-19 07:59:05,431 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_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/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_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 899879f260002e812b1d004dc9c25ad25c70810b966f965026df3bae657ec5ab
[2023-11-19 07:59:05,775 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-19 07:59:05,803 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-19 07:59:05,806 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-19 07:59:05,808 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-19 07:59:05,809 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-19 07:59:05,810 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/eca-rers2012/Problem14_label08.c
[2023-11-19 07:59:08,909 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-19 07:59:09,251 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-19 07:59:09,264 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/sv-benchmarks/c/eca-rers2012/Problem14_label08.c
[2023-11-19 07:59:09,291 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/data/4f9fad886/a8755fdafdb64edcbbff431286f6c7f1/FLAGb98b21e1b
[2023-11-19 07:59:09,311 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/data/4f9fad886/a8755fdafdb64edcbbff431286f6c7f1
[2023-11-19 07:59:09,318 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-19 07:59:09,320 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-19 07:59:09,322 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-19 07:59:09,322 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-19 07:59:09,328 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-19 07:59:09,329 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:09" (1/1) ...
[2023-11-19 07:59:09,331 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ad4787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:09, skipping insertion in model container
[2023-11-19 07:59:09,331 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:09" (1/1) ...
[2023-11-19 07:59:09,399 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-19 07:59:09,671 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_687ad18d-92fa-4b3d-b0b3-78fedb20b336/sv-benchmarks/c/eca-rers2012/Problem14_label08.c[1556,1569]
[2023-11-19 07:59:09,991 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:59:10,005 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-19 07:59:10,027 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_687ad18d-92fa-4b3d-b0b3-78fedb20b336/sv-benchmarks/c/eca-rers2012/Problem14_label08.c[1556,1569]
[2023-11-19 07:59:10,181 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:59:10,212 INFO  L206         MainTranslator]: Completed translation
[2023-11-19 07:59:10,212 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10 WrapperNode
[2023-11-19 07:59:10,213 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-19 07:59:10,214 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-19 07:59:10,214 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-19 07:59:10,215 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-19 07:59:10,224 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,261 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,416 INFO  L138                Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859
[2023-11-19 07:59:10,416 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-19 07:59:10,417 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-19 07:59:10,417 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-19 07:59:10,417 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-19 07:59:10,436 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,441 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,455 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,456 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,531 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,542 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,562 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,570 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,594 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-19 07:59:10,596 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-19 07:59:10,596 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-19 07:59:10,596 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-19 07:59:10,598 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (1/1) ...
[2023-11-19 07:59:10,605 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:59:10,622 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:10,638 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-19 07:59:10,668 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-19 07:59:10,689 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-19 07:59:10,689 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-19 07:59:10,690 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-19 07:59:10,690 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-19 07:59:10,785 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-19 07:59:10,788 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-19 07:59:12,343 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-19 07:59:12,357 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-19 07:59:12,358 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-19 07:59:12,364 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:12 BoogieIcfgContainer
[2023-11-19 07:59:12,364 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-19 07:59:12,367 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-19 07:59:12,367 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-19 07:59:12,371 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-19 07:59:12,371 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:09" (1/3) ...
[2023-11-19 07:59:12,372 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cea4b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:12, skipping insertion in model container
[2023-11-19 07:59:12,373 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:10" (2/3) ...
[2023-11-19 07:59:12,373 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cea4b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:12, skipping insertion in model container
[2023-11-19 07:59:12,373 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:12" (3/3) ...
[2023-11-19 07:59:12,375 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem14_label08.c
[2023-11-19 07:59:12,396 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-19 07:59:12,396 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-19 07:59:12,468 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-19 07:59:12,476 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34c1976f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-19 07:59:12,476 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-19 07:59:12,482 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:12,489 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2023-11-19 07:59:12,489 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:12,490 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:12,490 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:12,501 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:12,501 INFO  L85        PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times
[2023-11-19 07:59:12,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:12,515 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14403224]
[2023-11-19 07:59:12,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:12,517 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:12,649 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:12,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:59:12,844 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:12,844 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14403224]
[2023-11-19 07:59:12,845 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14403224] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:12,845 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:12,846 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-19 07:59:12,847 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074770017]
[2023-11-19 07:59:12,848 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:12,854 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:12,856 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:12,901 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:12,902 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:12,910 INFO  L87              Difference]: Start difference. First operand  has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:14,233 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:14,233 INFO  L93              Difference]: Finished difference Result 669 states and 1200 transitions.
[2023-11-19 07:59:14,236 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:14,237 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12
[2023-11-19 07:59:14,238 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:14,260 INFO  L225             Difference]: With dead ends: 669
[2023-11-19 07:59:14,260 INFO  L226             Difference]: Without dead ends: 360
[2023-11-19 07:59:14,268 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:14,272 INFO  L413           NwaCegarLoop]: 87 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:14,273 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 94 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-19 07:59:14,294 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 360 states.
[2023-11-19 07:59:14,333 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360.
[2023-11-19 07:59:14,336 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 360 states, 359 states have (on average 1.5208913649025069) internal successors, (546), 359 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:14,338 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 546 transitions.
[2023-11-19 07:59:14,339 INFO  L78                 Accepts]: Start accepts. Automaton has 360 states and 546 transitions. Word has length 12
[2023-11-19 07:59:14,339 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:14,340 INFO  L495      AbstractCegarLoop]: Abstraction has 360 states and 546 transitions.
[2023-11-19 07:59:14,340 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:14,340 INFO  L276                IsEmpty]: Start isEmpty. Operand 360 states and 546 transitions.
[2023-11-19 07:59:14,344 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2023-11-19 07:59:14,344 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:14,345 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:14,345 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-19 07:59:14,345 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:14,346 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:14,346 INFO  L85        PathProgramCache]: Analyzing trace with hash -2134975009, now seen corresponding path program 1 times
[2023-11-19 07:59:14,347 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:14,347 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105291009]
[2023-11-19 07:59:14,347 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:14,347 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:14,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:14,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:59:14,600 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:14,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105291009]
[2023-11-19 07:59:14,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105291009] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:14,601 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:14,601 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-19 07:59:14,602 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880055030]
[2023-11-19 07:59:14,602 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:14,603 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:14,604 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:14,605 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:14,605 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:14,605 INFO  L87              Difference]: Start difference. First operand 360 states and 546 transitions. Second operand  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:15,471 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:15,471 INFO  L93              Difference]: Finished difference Result 1074 states and 1633 transitions.
[2023-11-19 07:59:15,472 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:15,472 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87
[2023-11-19 07:59:15,473 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:15,477 INFO  L225             Difference]: With dead ends: 1074
[2023-11-19 07:59:15,477 INFO  L226             Difference]: Without dead ends: 716
[2023-11-19 07:59:15,478 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:15,480 INFO  L413           NwaCegarLoop]: 91 mSDtfsCounter, 122 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:15,481 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 95 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-19 07:59:15,483 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 716 states.
[2023-11-19 07:59:15,536 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716.
[2023-11-19 07:59:15,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 716 states, 715 states have (on average 1.353846153846154) internal successors, (968), 715 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:15,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 968 transitions.
[2023-11-19 07:59:15,547 INFO  L78                 Accepts]: Start accepts. Automaton has 716 states and 968 transitions. Word has length 87
[2023-11-19 07:59:15,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:15,548 INFO  L495      AbstractCegarLoop]: Abstraction has 716 states and 968 transitions.
[2023-11-19 07:59:15,548 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:15,548 INFO  L276                IsEmpty]: Start isEmpty. Operand 716 states and 968 transitions.
[2023-11-19 07:59:15,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2023-11-19 07:59:15,553 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:15,553 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:15,554 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-19 07:59:15,554 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:15,555 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:15,555 INFO  L85        PathProgramCache]: Analyzing trace with hash -831138347, now seen corresponding path program 1 times
[2023-11-19 07:59:15,555 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:15,557 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839932022]
[2023-11-19 07:59:15,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:15,557 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:15,635 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:16,026 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:59:16,026 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:16,027 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839932022]
[2023-11-19 07:59:16,027 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839932022] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:16,027 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:16,027 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:16,027 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020589560]
[2023-11-19 07:59:16,028 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:16,028 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-19 07:59:16,028 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:16,029 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-19 07:59:16,029 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-19 07:59:16,030 INFO  L87              Difference]: Start difference. First operand 716 states and 968 transitions. Second operand  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:17,308 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:17,308 INFO  L93              Difference]: Finished difference Result 1964 states and 2570 transitions.
[2023-11-19 07:59:17,316 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-19 07:59:17,316 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91
[2023-11-19 07:59:17,317 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:17,336 INFO  L225             Difference]: With dead ends: 1964
[2023-11-19 07:59:17,336 INFO  L226             Difference]: Without dead ends: 1250
[2023-11-19 07:59:17,338 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-19 07:59:17,339 INFO  L413           NwaCegarLoop]: 110 mSDtfsCounter, 419 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:17,340 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 121 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-19 07:59:17,345 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1250 states.
[2023-11-19 07:59:17,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250.
[2023-11-19 07:59:17,390 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1250 states, 1249 states have (on average 1.2361889511609288) internal successors, (1544), 1249 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:17,396 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1544 transitions.
[2023-11-19 07:59:17,397 INFO  L78                 Accepts]: Start accepts. Automaton has 1250 states and 1544 transitions. Word has length 91
[2023-11-19 07:59:17,397 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:17,397 INFO  L495      AbstractCegarLoop]: Abstraction has 1250 states and 1544 transitions.
[2023-11-19 07:59:17,398 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:17,398 INFO  L276                IsEmpty]: Start isEmpty. Operand 1250 states and 1544 transitions.
[2023-11-19 07:59:17,402 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 172
[2023-11-19 07:59:17,402 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:17,403 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:17,403 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-19 07:59:17,403 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:17,404 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:17,404 INFO  L85        PathProgramCache]: Analyzing trace with hash 756356681, now seen corresponding path program 1 times
[2023-11-19 07:59:17,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:17,404 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503577132]
[2023-11-19 07:59:17,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:17,405 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:17,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:17,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:59:17,796 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:17,796 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503577132]
[2023-11-19 07:59:17,797 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503577132] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:17,797 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:17,797 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:17,797 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043750768]
[2023-11-19 07:59:17,797 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:17,798 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-19 07:59:17,798 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:17,799 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-19 07:59:17,799 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-19 07:59:17,799 INFO  L87              Difference]: Start difference. First operand 1250 states and 1544 transitions. Second operand  has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:18,724 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:18,724 INFO  L93              Difference]: Finished difference Result 2705 states and 3353 transitions.
[2023-11-19 07:59:18,725 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-19 07:59:18,725 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171
[2023-11-19 07:59:18,726 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:18,735 INFO  L225             Difference]: With dead ends: 2705
[2023-11-19 07:59:18,735 INFO  L226             Difference]: Without dead ends: 1606
[2023-11-19 07:59:18,737 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-19 07:59:18,738 INFO  L413           NwaCegarLoop]: 111 mSDtfsCounter, 116 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:18,739 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 119 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-19 07:59:18,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1606 states.
[2023-11-19 07:59:18,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606.
[2023-11-19 07:59:18,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1606 states, 1605 states have (on average 1.1221183800623054) internal successors, (1801), 1605 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:18,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1801 transitions.
[2023-11-19 07:59:18,786 INFO  L78                 Accepts]: Start accepts. Automaton has 1606 states and 1801 transitions. Word has length 171
[2023-11-19 07:59:18,786 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:18,787 INFO  L495      AbstractCegarLoop]: Abstraction has 1606 states and 1801 transitions.
[2023-11-19 07:59:18,787 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:18,787 INFO  L276                IsEmpty]: Start isEmpty. Operand 1606 states and 1801 transitions.
[2023-11-19 07:59:18,792 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 299
[2023-11-19 07:59:18,793 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:18,793 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:18,793 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-19 07:59:18,794 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:18,794 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:18,794 INFO  L85        PathProgramCache]: Analyzing trace with hash -517021320, now seen corresponding path program 1 times
[2023-11-19 07:59:18,795 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:18,795 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620449237]
[2023-11-19 07:59:18,795 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:18,795 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:18,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:19,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 282 backedges. 77 proven. 130 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2023-11-19 07:59:19,466 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:19,466 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620449237]
[2023-11-19 07:59:19,467 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620449237] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:19,467 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082889896]
[2023-11-19 07:59:19,467 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:19,467 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:19,468 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:19,472 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:19,495 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-19 07:59:19,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:19,676 INFO  L262         TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-19 07:59:19,689 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:20,190 INFO  L134       CoverageAnalysis]: Checked inductivity of 282 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked.
[2023-11-19 07:59:20,191 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:20,191 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082889896] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:20,192 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:20,192 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5
[2023-11-19 07:59:20,192 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298419510]
[2023-11-19 07:59:20,192 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:20,194 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:20,194 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:20,194 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:20,198 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-19 07:59:20,198 INFO  L87              Difference]: Start difference. First operand 1606 states and 1801 transitions. Second operand  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:20,855 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:20,855 INFO  L93              Difference]: Finished difference Result 3388 states and 3901 transitions.
[2023-11-19 07:59:20,855 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:20,856 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 298
[2023-11-19 07:59:20,858 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:20,868 INFO  L225             Difference]: With dead ends: 3388
[2023-11-19 07:59:20,868 INFO  L226             Difference]: Without dead ends: 1962
[2023-11-19 07:59:20,871 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-19 07:59:20,874 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:20,875 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 47 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:20,878 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1962 states.
[2023-11-19 07:59:20,915 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784.
[2023-11-19 07:59:20,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1784 states, 1783 states have (on average 1.1318003365114975) internal successors, (2018), 1783 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:20,925 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2018 transitions.
[2023-11-19 07:59:20,926 INFO  L78                 Accepts]: Start accepts. Automaton has 1784 states and 2018 transitions. Word has length 298
[2023-11-19 07:59:20,928 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:20,929 INFO  L495      AbstractCegarLoop]: Abstraction has 1784 states and 2018 transitions.
[2023-11-19 07:59:20,929 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:20,929 INFO  L276                IsEmpty]: Start isEmpty. Operand 1784 states and 2018 transitions.
[2023-11-19 07:59:20,934 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 303
[2023-11-19 07:59:20,934 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:20,935 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:20,963 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:21,152 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:21,152 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:21,152 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:21,152 INFO  L85        PathProgramCache]: Analyzing trace with hash -1449630482, now seen corresponding path program 1 times
[2023-11-19 07:59:21,153 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:21,153 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061123411]
[2023-11-19 07:59:21,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:21,153 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:21,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:21,714 INFO  L134       CoverageAnalysis]: Checked inductivity of 290 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2023-11-19 07:59:21,714 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:21,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061123411]
[2023-11-19 07:59:21,715 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061123411] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:21,715 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:21,715 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:21,715 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525930956]
[2023-11-19 07:59:21,715 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:21,716 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:21,716 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:21,717 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:21,717 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:21,718 INFO  L87              Difference]: Start difference. First operand 1784 states and 2018 transitions. Second operand  has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:22,367 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:22,368 INFO  L93              Difference]: Finished difference Result 3744 states and 4282 transitions.
[2023-11-19 07:59:22,368 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:22,368 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 302
[2023-11-19 07:59:22,369 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:22,381 INFO  L225             Difference]: With dead ends: 3744
[2023-11-19 07:59:22,382 INFO  L226             Difference]: Without dead ends: 2140
[2023-11-19 07:59:22,392 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:22,396 INFO  L413           NwaCegarLoop]: 73 mSDtfsCounter, 101 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:22,397 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 77 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:22,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2140 states.
[2023-11-19 07:59:22,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140.
[2023-11-19 07:59:22,475 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2140 states, 2139 states have (on average 1.1280972417017299) internal successors, (2413), 2139 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:22,483 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2413 transitions.
[2023-11-19 07:59:22,483 INFO  L78                 Accepts]: Start accepts. Automaton has 2140 states and 2413 transitions. Word has length 302
[2023-11-19 07:59:22,484 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:22,484 INFO  L495      AbstractCegarLoop]: Abstraction has 2140 states and 2413 transitions.
[2023-11-19 07:59:22,485 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:22,485 INFO  L276                IsEmpty]: Start isEmpty. Operand 2140 states and 2413 transitions.
[2023-11-19 07:59:22,490 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 330
[2023-11-19 07:59:22,490 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:22,491 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1]
[2023-11-19 07:59:22,491 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-19 07:59:22,491 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:22,491 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:22,492 INFO  L85        PathProgramCache]: Analyzing trace with hash -606637260, now seen corresponding path program 1 times
[2023-11-19 07:59:22,492 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:22,492 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140627615]
[2023-11-19 07:59:22,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:22,493 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:22,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:22,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2023-11-19 07:59:22,743 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:22,743 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140627615]
[2023-11-19 07:59:22,744 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140627615] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:22,744 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:22,744 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:22,744 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864023622]
[2023-11-19 07:59:22,746 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:22,747 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:22,747 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:22,748 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:22,748 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:22,748 INFO  L87              Difference]: Start difference. First operand 2140 states and 2413 transitions. Second operand  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:23,447 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:23,448 INFO  L93              Difference]: Finished difference Result 4634 states and 5316 transitions.
[2023-11-19 07:59:23,448 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:23,448 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 329
[2023-11-19 07:59:23,449 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:23,464 INFO  L225             Difference]: With dead ends: 4634
[2023-11-19 07:59:23,464 INFO  L226             Difference]: Without dead ends: 2674
[2023-11-19 07:59:23,467 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:23,468 INFO  L413           NwaCegarLoop]: 63 mSDtfsCounter, 175 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:23,468 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 67 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:23,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2674 states.
[2023-11-19 07:59:23,521 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2318.
[2023-11-19 07:59:23,526 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2318 states, 2317 states have (on average 1.131635735865343) internal successors, (2622), 2317 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:23,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2622 transitions.
[2023-11-19 07:59:23,535 INFO  L78                 Accepts]: Start accepts. Automaton has 2318 states and 2622 transitions. Word has length 329
[2023-11-19 07:59:23,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:23,536 INFO  L495      AbstractCegarLoop]: Abstraction has 2318 states and 2622 transitions.
[2023-11-19 07:59:23,536 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:23,536 INFO  L276                IsEmpty]: Start isEmpty. Operand 2318 states and 2622 transitions.
[2023-11-19 07:59:23,541 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2023-11-19 07:59:23,541 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:23,542 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:23,542 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-19 07:59:23,542 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:23,543 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:23,543 INFO  L85        PathProgramCache]: Analyzing trace with hash -619556775, now seen corresponding path program 1 times
[2023-11-19 07:59:23,544 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:23,544 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185595126]
[2023-11-19 07:59:23,544 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:23,544 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:23,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:23,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2023-11-19 07:59:23,877 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:23,877 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185595126]
[2023-11-19 07:59:23,877 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185595126] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:23,877 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:23,878 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:23,878 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280353039]
[2023-11-19 07:59:23,878 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:23,879 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:23,879 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:23,879 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:23,880 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:23,880 INFO  L87              Difference]: Start difference. First operand 2318 states and 2622 transitions. Second operand  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:24,554 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:24,555 INFO  L93              Difference]: Finished difference Result 3032 states and 3475 transitions.
[2023-11-19 07:59:24,555 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:24,555 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 336
[2023-11-19 07:59:24,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:24,571 INFO  L225             Difference]: With dead ends: 3032
[2023-11-19 07:59:24,572 INFO  L226             Difference]: Without dead ends: 3030
[2023-11-19 07:59:24,573 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:24,574 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:24,575 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 18 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:24,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3030 states.
[2023-11-19 07:59:24,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2674.
[2023-11-19 07:59:24,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2674 states, 2673 states have (on average 1.1560044893378227) internal successors, (3090), 2673 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:24,646 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3090 transitions.
[2023-11-19 07:59:24,647 INFO  L78                 Accepts]: Start accepts. Automaton has 2674 states and 3090 transitions. Word has length 336
[2023-11-19 07:59:24,647 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:24,647 INFO  L495      AbstractCegarLoop]: Abstraction has 2674 states and 3090 transitions.
[2023-11-19 07:59:24,648 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:24,648 INFO  L276                IsEmpty]: Start isEmpty. Operand 2674 states and 3090 transitions.
[2023-11-19 07:59:24,655 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 382
[2023-11-19 07:59:24,655 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:24,656 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:24,656 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2023-11-19 07:59:24,656 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:24,657 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:24,657 INFO  L85        PathProgramCache]: Analyzing trace with hash 2024915570, now seen corresponding path program 1 times
[2023-11-19 07:59:24,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:24,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938868570]
[2023-11-19 07:59:24,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:24,658 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:24,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:25,220 INFO  L134       CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked.
[2023-11-19 07:59:25,221 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:25,221 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938868570]
[2023-11-19 07:59:25,221 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938868570] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:25,221 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210317675]
[2023-11-19 07:59:25,221 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:25,222 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:25,222 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:25,224 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:25,252 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-19 07:59:25,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:25,450 INFO  L262         TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-19 07:59:25,467 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:25,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked.
[2023-11-19 07:59:25,974 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:25,976 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210317675] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:25,976 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:25,976 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-19 07:59:25,977 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836893512]
[2023-11-19 07:59:25,977 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:25,978 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:25,978 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:25,978 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:25,979 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-19 07:59:25,979 INFO  L87              Difference]: Start difference. First operand 2674 states and 3090 transitions. Second operand  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:26,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:26,557 INFO  L93              Difference]: Finished difference Result 3744 states and 4293 transitions.
[2023-11-19 07:59:26,557 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:26,557 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 381
[2023-11-19 07:59:26,558 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:26,576 INFO  L225             Difference]: With dead ends: 3744
[2023-11-19 07:59:26,576 INFO  L226             Difference]: Without dead ends: 3742
[2023-11-19 07:59:26,577 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-19 07:59:26,578 INFO  L413           NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:26,579 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-19 07:59:26,583 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3742 states.
[2023-11-19 07:59:26,633 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 2496.
[2023-11-19 07:59:26,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2496 states, 2495 states have (on average 1.1366733466933867) internal successors, (2836), 2495 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:26,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2836 transitions.
[2023-11-19 07:59:26,645 INFO  L78                 Accepts]: Start accepts. Automaton has 2496 states and 2836 transitions. Word has length 381
[2023-11-19 07:59:26,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:26,646 INFO  L495      AbstractCegarLoop]: Abstraction has 2496 states and 2836 transitions.
[2023-11-19 07:59:26,646 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:26,646 INFO  L276                IsEmpty]: Start isEmpty. Operand 2496 states and 2836 transitions.
[2023-11-19 07:59:26,654 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 383
[2023-11-19 07:59:26,654 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:26,654 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:26,684 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:26,875 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:26,875 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:26,875 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:26,876 INFO  L85        PathProgramCache]: Analyzing trace with hash 656083810, now seen corresponding path program 1 times
[2023-11-19 07:59:26,876 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:26,876 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58846499]
[2023-11-19 07:59:26,876 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:26,876 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:26,955 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:27,400 INFO  L134       CoverageAnalysis]: Checked inductivity of 538 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked.
[2023-11-19 07:59:27,401 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:27,401 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58846499]
[2023-11-19 07:59:27,401 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58846499] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:27,401 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:27,402 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:27,402 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009429001]
[2023-11-19 07:59:27,402 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:27,403 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-19 07:59:27,403 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:27,403 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-19 07:59:27,404 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-19 07:59:27,404 INFO  L87              Difference]: Start difference. First operand 2496 states and 2836 transitions. Second operand  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:28,137 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:28,137 INFO  L93              Difference]: Finished difference Result 5019 states and 5716 transitions.
[2023-11-19 07:59:28,137 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-19 07:59:28,138 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 382
[2023-11-19 07:59:28,139 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:28,152 INFO  L225             Difference]: With dead ends: 5019
[2023-11-19 07:59:28,152 INFO  L226             Difference]: Without dead ends: 2674
[2023-11-19 07:59:28,155 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-19 07:59:28,156 INFO  L413           NwaCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:28,157 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 17 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-19 07:59:28,161 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2674 states.
[2023-11-19 07:59:28,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2496.
[2023-11-19 07:59:28,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2496 states, 2495 states have (on average 1.08937875751503) internal successors, (2718), 2495 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:28,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2718 transitions.
[2023-11-19 07:59:28,220 INFO  L78                 Accepts]: Start accepts. Automaton has 2496 states and 2718 transitions. Word has length 382
[2023-11-19 07:59:28,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:28,221 INFO  L495      AbstractCegarLoop]: Abstraction has 2496 states and 2718 transitions.
[2023-11-19 07:59:28,221 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:28,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 2496 states and 2718 transitions.
[2023-11-19 07:59:28,229 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 409
[2023-11-19 07:59:28,230 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:28,230 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:28,230 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2023-11-19 07:59:28,231 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:28,231 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:28,232 INFO  L85        PathProgramCache]: Analyzing trace with hash 1353845731, now seen corresponding path program 2 times
[2023-11-19 07:59:28,232 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:28,232 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543159459]
[2023-11-19 07:59:28,232 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:28,232 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:28,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:29,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 589 backedges. 289 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2023-11-19 07:59:29,197 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:29,197 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543159459]
[2023-11-19 07:59:29,197 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543159459] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:29,198 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960242204]
[2023-11-19 07:59:29,198 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-19 07:59:29,198 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:29,198 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:29,199 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:29,216 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-19 07:59:29,375 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-19 07:59:29,376 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-19 07:59:29,378 INFO  L262         TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-19 07:59:29,386 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:30,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 589 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2023-11-19 07:59:30,166 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:30,166 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960242204] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:30,166 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:30,167 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2023-11-19 07:59:30,167 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120803801]
[2023-11-19 07:59:30,167 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:30,168 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-19 07:59:30,168 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:30,169 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-19 07:59:30,170 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-19 07:59:30,170 INFO  L87              Difference]: Start difference. First operand 2496 states and 2718 transitions. Second operand  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:31,016 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:31,016 INFO  L93              Difference]: Finished difference Result 5702 states and 6202 transitions.
[2023-11-19 07:59:31,017 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-19 07:59:31,017 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 408
[2023-11-19 07:59:31,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:31,035 INFO  L225             Difference]: With dead ends: 5702
[2023-11-19 07:59:31,036 INFO  L226             Difference]: Without dead ends: 3386
[2023-11-19 07:59:31,039 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-19 07:59:31,040 INFO  L413           NwaCegarLoop]: 7 mSDtfsCounter, 265 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:31,040 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 14 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-19 07:59:31,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3386 states.
[2023-11-19 07:59:31,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2674.
[2023-11-19 07:59:31,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2674 states, 2673 states have (on average 1.083426861204639) internal successors, (2896), 2673 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:31,122 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 2896 transitions.
[2023-11-19 07:59:31,122 INFO  L78                 Accepts]: Start accepts. Automaton has 2674 states and 2896 transitions. Word has length 408
[2023-11-19 07:59:31,123 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:31,123 INFO  L495      AbstractCegarLoop]: Abstraction has 2674 states and 2896 transitions.
[2023-11-19 07:59:31,123 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:31,124 INFO  L276                IsEmpty]: Start isEmpty. Operand 2674 states and 2896 transitions.
[2023-11-19 07:59:31,133 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 416
[2023-11-19 07:59:31,133 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:31,135 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:31,160 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:31,348 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-19 07:59:31,348 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:31,348 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:31,349 INFO  L85        PathProgramCache]: Analyzing trace with hash -1185462242, now seen corresponding path program 1 times
[2023-11-19 07:59:31,349 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:31,349 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463967205]
[2023-11-19 07:59:31,349 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:31,349 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:31,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:31,858 INFO  L134       CoverageAnalysis]: Checked inductivity of 589 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2023-11-19 07:59:31,858 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:31,858 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463967205]
[2023-11-19 07:59:31,858 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463967205] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:31,858 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:31,859 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:31,859 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384856294]
[2023-11-19 07:59:31,859 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:31,860 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:31,860 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:31,860 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:31,860 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:31,861 INFO  L87              Difference]: Start difference. First operand 2674 states and 2896 transitions. Second operand  has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:32,514 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:32,514 INFO  L93              Difference]: Finished difference Result 5702 states and 6228 transitions.
[2023-11-19 07:59:32,518 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:32,518 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 415
[2023-11-19 07:59:32,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:32,535 INFO  L225             Difference]: With dead ends: 5702
[2023-11-19 07:59:32,535 INFO  L226             Difference]: Without dead ends: 3208
[2023-11-19 07:59:32,538 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:32,539 INFO  L413           NwaCegarLoop]: 215 mSDtfsCounter, 103 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:32,539 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 220 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:32,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3208 states.
[2023-11-19 07:59:32,591 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 3030.
[2023-11-19 07:59:32,597 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3030 states, 3029 states have (on average 1.0822053482997689) internal successors, (3278), 3029 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:32,603 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 3278 transitions.
[2023-11-19 07:59:32,603 INFO  L78                 Accepts]: Start accepts. Automaton has 3030 states and 3278 transitions. Word has length 415
[2023-11-19 07:59:32,604 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:32,604 INFO  L495      AbstractCegarLoop]: Abstraction has 3030 states and 3278 transitions.
[2023-11-19 07:59:32,604 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:32,605 INFO  L276                IsEmpty]: Start isEmpty. Operand 3030 states and 3278 transitions.
[2023-11-19 07:59:32,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 461
[2023-11-19 07:59:32,614 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:32,615 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:32,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2023-11-19 07:59:32,615 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:32,615 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:32,616 INFO  L85        PathProgramCache]: Analyzing trace with hash -772110107, now seen corresponding path program 1 times
[2023-11-19 07:59:32,616 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:32,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028862113]
[2023-11-19 07:59:32,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:32,616 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:32,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:33,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 589 backedges. 289 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2023-11-19 07:59:33,587 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:33,587 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028862113]
[2023-11-19 07:59:33,587 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028862113] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:33,587 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144799927]
[2023-11-19 07:59:33,588 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:33,588 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:33,588 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:33,593 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:33,600 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-19 07:59:33,779 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:33,781 INFO  L262         TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-19 07:59:33,788 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:33,828 INFO  L134       CoverageAnalysis]: Checked inductivity of 589 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked.
[2023-11-19 07:59:33,829 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:33,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144799927] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:33,829 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:33,830 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2023-11-19 07:59:33,832 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696056689]
[2023-11-19 07:59:33,833 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:33,833 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:33,834 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:33,835 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:33,835 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:33,835 INFO  L87              Difference]: Start difference. First operand 3030 states and 3278 transitions. Second operand  has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:34,406 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:34,406 INFO  L93              Difference]: Finished difference Result 4100 states and 4425 transitions.
[2023-11-19 07:59:34,407 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:34,407 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 460
[2023-11-19 07:59:34,408 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:34,436 INFO  L225             Difference]: With dead ends: 4100
[2023-11-19 07:59:34,436 INFO  L226             Difference]: Without dead ends: 4098
[2023-11-19 07:59:34,438 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:34,439 INFO  L413           NwaCegarLoop]: 7 mSDtfsCounter, 190 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:34,439 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 11 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-19 07:59:34,444 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4098 states.
[2023-11-19 07:59:34,535 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 3030.
[2023-11-19 07:59:34,540 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3030 states, 3029 states have (on average 1.0822053482997689) internal successors, (3278), 3029 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:34,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 3278 transitions.
[2023-11-19 07:59:34,547 INFO  L78                 Accepts]: Start accepts. Automaton has 3030 states and 3278 transitions. Word has length 460
[2023-11-19 07:59:34,547 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:34,548 INFO  L495      AbstractCegarLoop]: Abstraction has 3030 states and 3278 transitions.
[2023-11-19 07:59:34,548 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:34,548 INFO  L276                IsEmpty]: Start isEmpty. Operand 3030 states and 3278 transitions.
[2023-11-19 07:59:34,555 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 608
[2023-11-19 07:59:34,555 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:34,556 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:34,583 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:34,776 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-19 07:59:34,776 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:34,777 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:34,777 INFO  L85        PathProgramCache]: Analyzing trace with hash 370655365, now seen corresponding path program 1 times
[2023-11-19 07:59:34,777 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:34,777 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382150618]
[2023-11-19 07:59:34,777 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:34,777 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:34,899 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:36,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 1098 backedges. 788 proven. 195 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked.
[2023-11-19 07:59:36,167 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:36,167 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382150618]
[2023-11-19 07:59:36,167 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382150618] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:36,167 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063624517]
[2023-11-19 07:59:36,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:36,168 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:36,168 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:36,181 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:36,196 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-19 07:59:36,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:36,415 INFO  L262         TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-19 07:59:36,423 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:36,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 1098 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 1049 trivial. 0 not checked.
[2023-11-19 07:59:36,481 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:36,481 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063624517] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:36,481 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:36,482 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2023-11-19 07:59:36,482 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147323148]
[2023-11-19 07:59:36,482 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:36,483 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:36,483 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:36,484 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:36,484 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:36,485 INFO  L87              Difference]: Start difference. First operand 3030 states and 3278 transitions. Second operand  has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:37,086 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:37,086 INFO  L93              Difference]: Finished difference Result 6770 states and 7397 transitions.
[2023-11-19 07:59:37,087 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:37,088 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 607
[2023-11-19 07:59:37,089 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:37,097 INFO  L225             Difference]: With dead ends: 6770
[2023-11-19 07:59:37,097 INFO  L226             Difference]: Without dead ends: 4098
[2023-11-19 07:59:37,101 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:37,102 INFO  L413           NwaCegarLoop]: 211 mSDtfsCounter, 179 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:37,102 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 216 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:37,107 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4098 states.
[2023-11-19 07:59:37,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 3920.
[2023-11-19 07:59:37,163 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3920 states, 3919 states have (on average 1.080122480224547) internal successors, (4233), 3919 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:37,169 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4233 transitions.
[2023-11-19 07:59:37,170 INFO  L78                 Accepts]: Start accepts. Automaton has 3920 states and 4233 transitions. Word has length 607
[2023-11-19 07:59:37,171 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:37,171 INFO  L495      AbstractCegarLoop]: Abstraction has 3920 states and 4233 transitions.
[2023-11-19 07:59:37,172 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:37,172 INFO  L276                IsEmpty]: Start isEmpty. Operand 3920 states and 4233 transitions.
[2023-11-19 07:59:37,180 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 633
[2023-11-19 07:59:37,181 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:37,181 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:37,207 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:37,396 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-19 07:59:37,396 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:37,396 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:37,397 INFO  L85        PathProgramCache]: Analyzing trace with hash -475434087, now seen corresponding path program 1 times
[2023-11-19 07:59:37,397 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:37,397 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522409162]
[2023-11-19 07:59:37,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:37,397 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:37,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:38,704 INFO  L134       CoverageAnalysis]: Checked inductivity of 1159 backedges. 849 proven. 195 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked.
[2023-11-19 07:59:38,704 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:38,704 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522409162]
[2023-11-19 07:59:38,704 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522409162] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:38,705 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129656444]
[2023-11-19 07:59:38,705 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:38,705 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:38,705 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:38,708 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:38,724 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-19 07:59:38,971 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:38,974 INFO  L262         TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-19 07:59:38,983 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:39,651 INFO  L134       CoverageAnalysis]: Checked inductivity of 1159 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked.
[2023-11-19 07:59:39,651 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:59:39,651 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129656444] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:39,652 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:59:39,652 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6
[2023-11-19 07:59:39,652 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732506609]
[2023-11-19 07:59:39,652 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:39,653 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:39,654 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:39,654 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:39,654 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:39,655 INFO  L87              Difference]: Start difference. First operand 3920 states and 4233 transitions. Second operand  has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:40,193 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:40,193 INFO  L93              Difference]: Finished difference Result 8550 states and 9248 transitions.
[2023-11-19 07:59:40,193 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:40,194 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 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 632
[2023-11-19 07:59:40,195 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:40,204 INFO  L225             Difference]: With dead ends: 8550
[2023-11-19 07:59:40,204 INFO  L226             Difference]: Without dead ends: 4988
[2023-11-19 07:59:40,208 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:59:40,209 INFO  L413           NwaCegarLoop]: 46 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:40,209 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-19 07:59:40,216 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4988 states.
[2023-11-19 07:59:40,278 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4454.
[2023-11-19 07:59:40,282 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4454 states, 4453 states have (on average 1.0790478329216258) internal successors, (4805), 4453 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:40,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4454 states to 4454 states and 4805 transitions.
[2023-11-19 07:59:40,289 INFO  L78                 Accepts]: Start accepts. Automaton has 4454 states and 4805 transitions. Word has length 632
[2023-11-19 07:59:40,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:40,290 INFO  L495      AbstractCegarLoop]: Abstraction has 4454 states and 4805 transitions.
[2023-11-19 07:59:40,291 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:40,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 4454 states and 4805 transitions.
[2023-11-19 07:59:40,299 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 637
[2023-11-19 07:59:40,299 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:40,300 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:40,321 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:40,520 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-19 07:59:40,521 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:40,521 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:40,521 INFO  L85        PathProgramCache]: Analyzing trace with hash -258490570, now seen corresponding path program 1 times
[2023-11-19 07:59:40,521 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:40,521 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065326267]
[2023-11-19 07:59:40,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:40,522 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:40,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:41,044 INFO  L134       CoverageAnalysis]: Checked inductivity of 1134 backedges. 810 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked.
[2023-11-19 07:59:41,045 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:41,045 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065326267]
[2023-11-19 07:59:41,045 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065326267] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:41,045 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:41,046 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:41,046 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772248436]
[2023-11-19 07:59:41,046 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:41,047 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:41,047 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:41,049 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:41,049 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:41,049 INFO  L87              Difference]: Start difference. First operand 4454 states and 4805 transitions. Second operand  has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:41,697 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:41,697 INFO  L93              Difference]: Finished difference Result 9262 states and 10061 transitions.
[2023-11-19 07:59:41,701 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:41,702 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 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 636
[2023-11-19 07:59:41,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:41,710 INFO  L225             Difference]: With dead ends: 9262
[2023-11-19 07:59:41,711 INFO  L226             Difference]: Without dead ends: 5166
[2023-11-19 07:59:41,715 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:41,716 INFO  L413           NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:41,716 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:41,723 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5166 states.
[2023-11-19 07:59:41,787 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5166.
[2023-11-19 07:59:41,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5166 states, 5165 states have (on average 1.0747337850919652) internal successors, (5551), 5165 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:41,800 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5551 transitions.
[2023-11-19 07:59:41,800 INFO  L78                 Accepts]: Start accepts. Automaton has 5166 states and 5551 transitions. Word has length 636
[2023-11-19 07:59:41,801 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:41,801 INFO  L495      AbstractCegarLoop]: Abstraction has 5166 states and 5551 transitions.
[2023-11-19 07:59:41,801 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:41,801 INFO  L276                IsEmpty]: Start isEmpty. Operand 5166 states and 5551 transitions.
[2023-11-19 07:59:41,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 650
[2023-11-19 07:59:41,810 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:41,811 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:41,811 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2023-11-19 07:59:41,811 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:41,812 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:41,812 INFO  L85        PathProgramCache]: Analyzing trace with hash -1567182769, now seen corresponding path program 1 times
[2023-11-19 07:59:41,812 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:41,812 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557470315]
[2023-11-19 07:59:41,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:41,813 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:41,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:42,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 1474 backedges. 1015 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked.
[2023-11-19 07:59:42,564 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:42,565 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557470315]
[2023-11-19 07:59:42,565 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557470315] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:42,565 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:42,565 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:42,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291783997]
[2023-11-19 07:59:42,566 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:42,567 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:42,567 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:42,568 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:42,568 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:42,568 INFO  L87              Difference]: Start difference. First operand 5166 states and 5551 transitions. Second operand  has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:43,108 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:43,108 INFO  L93              Difference]: Finished difference Result 10152 states and 10921 transitions.
[2023-11-19 07:59:43,109 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:43,109 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 649
[2023-11-19 07:59:43,110 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:43,119 INFO  L225             Difference]: With dead ends: 10152
[2023-11-19 07:59:43,119 INFO  L226             Difference]: Without dead ends: 5166
[2023-11-19 07:59:43,124 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:43,125 INFO  L413           NwaCegarLoop]: 240 mSDtfsCounter, 110 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:43,125 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 245 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-19 07:59:43,131 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5166 states.
[2023-11-19 07:59:43,190 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4632.
[2023-11-19 07:59:43,195 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4632 states, 4631 states have (on average 1.0796804145972791) internal successors, (5000), 4631 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:43,202 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 5000 transitions.
[2023-11-19 07:59:43,202 INFO  L78                 Accepts]: Start accepts. Automaton has 4632 states and 5000 transitions. Word has length 649
[2023-11-19 07:59:43,203 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:43,203 INFO  L495      AbstractCegarLoop]: Abstraction has 4632 states and 5000 transitions.
[2023-11-19 07:59:43,203 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:43,204 INFO  L276                IsEmpty]: Start isEmpty. Operand 4632 states and 5000 transitions.
[2023-11-19 07:59:43,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 734
[2023-11-19 07:59:43,213 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:43,214 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:43,214 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2023-11-19 07:59:43,215 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:43,215 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:43,215 INFO  L85        PathProgramCache]: Analyzing trace with hash -1558045314, now seen corresponding path program 1 times
[2023-11-19 07:59:43,215 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:43,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393232760]
[2023-11-19 07:59:43,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:43,216 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:43,326 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:43,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 1951 backedges. 1423 proven. 0 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked.
[2023-11-19 07:59:43,981 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:43,981 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393232760]
[2023-11-19 07:59:43,982 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393232760] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:43,982 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:43,982 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:43,982 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748168309]
[2023-11-19 07:59:43,982 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:43,983 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:43,984 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:43,984 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:43,985 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:43,985 INFO  L87              Difference]: Start difference. First operand 4632 states and 5000 transitions. Second operand  has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:44,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:44,523 INFO  L93              Difference]: Finished difference Result 9084 states and 9819 transitions.
[2023-11-19 07:59:44,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:44,524 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 733
[2023-11-19 07:59:44,525 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:44,532 INFO  L225             Difference]: With dead ends: 9084
[2023-11-19 07:59:44,533 INFO  L226             Difference]: Without dead ends: 4632
[2023-11-19 07:59:44,538 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:44,538 INFO  L413           NwaCegarLoop]: 237 mSDtfsCounter, 104 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:44,539 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 241 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-19 07:59:44,545 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4632 states.
[2023-11-19 07:59:44,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 4454.
[2023-11-19 07:59:44,607 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4454 states, 4453 states have (on average 1.0693914215135862) internal successors, (4762), 4453 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:44,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4454 states to 4454 states and 4762 transitions.
[2023-11-19 07:59:44,614 INFO  L78                 Accepts]: Start accepts. Automaton has 4454 states and 4762 transitions. Word has length 733
[2023-11-19 07:59:44,614 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:44,614 INFO  L495      AbstractCegarLoop]: Abstraction has 4454 states and 4762 transitions.
[2023-11-19 07:59:44,614 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:44,615 INFO  L276                IsEmpty]: Start isEmpty. Operand 4454 states and 4762 transitions.
[2023-11-19 07:59:44,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 792
[2023-11-19 07:59:44,625 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:44,625 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:44,625 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2023-11-19 07:59:44,626 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:44,626 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:44,626 INFO  L85        PathProgramCache]: Analyzing trace with hash -650296771, now seen corresponding path program 1 times
[2023-11-19 07:59:44,626 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:44,627 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573813776]
[2023-11-19 07:59:44,627 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:44,627 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:44,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:45,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 1747 backedges. 1268 proven. 155 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked.
[2023-11-19 07:59:45,343 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:45,344 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573813776]
[2023-11-19 07:59:45,344 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573813776] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:59:45,344 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705592193]
[2023-11-19 07:59:45,344 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:45,344 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:45,344 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:59:45,345 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:59:45,376 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-19 07:59:45,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:45,628 INFO  L262         TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-19 07:59:45,638 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:59:46,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 1747 backedges. 1268 proven. 155 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked.
[2023-11-19 07:59:46,113 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:59:46,614 INFO  L134       CoverageAnalysis]: Checked inductivity of 1747 backedges. 1268 proven. 155 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked.
[2023-11-19 07:59:46,615 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705592193] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:59:46,615 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:59:46,616 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2023-11-19 07:59:46,616 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470058010]
[2023-11-19 07:59:46,616 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:59:46,619 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-19 07:59:46,619 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:46,620 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-19 07:59:46,621 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-19 07:59:46,621 INFO  L87              Difference]: Start difference. First operand 4454 states and 4762 transitions. Second operand  has 6 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:47,890 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:47,890 INFO  L93              Difference]: Finished difference Result 10330 states and 11083 transitions.
[2023-11-19 07:59:47,891 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-19 07:59:47,891 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 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 791
[2023-11-19 07:59:47,892 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:47,906 INFO  L225             Difference]: With dead ends: 10330
[2023-11-19 07:59:47,906 INFO  L226             Difference]: Without dead ends: 6056
[2023-11-19 07:59:47,911 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1580 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-19 07:59:47,912 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:47,913 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 56 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-19 07:59:47,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6056 states.
[2023-11-19 07:59:48,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5700.
[2023-11-19 07:59:48,034 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5700 states, 5699 states have (on average 1.0677311809089314) internal successors, (6085), 5699 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:48,046 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6085 transitions.
[2023-11-19 07:59:48,046 INFO  L78                 Accepts]: Start accepts. Automaton has 5700 states and 6085 transitions. Word has length 791
[2023-11-19 07:59:48,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:48,048 INFO  L495      AbstractCegarLoop]: Abstraction has 5700 states and 6085 transitions.
[2023-11-19 07:59:48,048 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:48,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 5700 states and 6085 transitions.
[2023-11-19 07:59:48,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 812
[2023-11-19 07:59:48,066 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:48,067 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:48,102 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-19 07:59:48,292 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ad18d-92fa-4b3d-b0b3-78fedb20b336/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:59:48,292 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:48,293 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:48,293 INFO  L85        PathProgramCache]: Analyzing trace with hash -459538693, now seen corresponding path program 1 times
[2023-11-19 07:59:48,293 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:48,293 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077900862]
[2023-11-19 07:59:48,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:48,294 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:48,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:59:49,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 2141 backedges. 1359 proven. 0 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked.
[2023-11-19 07:59:49,066 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:59:49,066 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077900862]
[2023-11-19 07:59:49,067 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077900862] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:59:49,067 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:59:49,067 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-19 07:59:49,067 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048542816]
[2023-11-19 07:59:49,068 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:59:49,069 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:59:49,069 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:59:49,071 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:59:49,071 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:49,072 INFO  L87              Difference]: Start difference. First operand 5700 states and 6085 transitions. Second operand  has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:49,687 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:59:49,687 INFO  L93              Difference]: Finished difference Result 12110 states and 13002 transitions.
[2023-11-19 07:59:49,688 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-19 07:59:49,688 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 811
[2023-11-19 07:59:49,689 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:59:49,697 INFO  L225             Difference]: With dead ends: 12110
[2023-11-19 07:59:49,698 INFO  L226             Difference]: Without dead ends: 6590
[2023-11-19 07:59:49,704 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:59:49,705 INFO  L413           NwaCegarLoop]: 222 mSDtfsCounter, 110 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-19 07:59:49,705 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 227 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-19 07:59:49,712 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6590 states.
[2023-11-19 07:59:49,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 6234.
[2023-11-19 07:59:49,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6234 states, 6233 states have (on average 1.0572757901492058) internal successors, (6590), 6233 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:49,817 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 6590 transitions.
[2023-11-19 07:59:49,817 INFO  L78                 Accepts]: Start accepts. Automaton has 6234 states and 6590 transitions. Word has length 811
[2023-11-19 07:59:49,818 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:59:49,818 INFO  L495      AbstractCegarLoop]: Abstraction has 6234 states and 6590 transitions.
[2023-11-19 07:59:49,818 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:59:49,818 INFO  L276                IsEmpty]: Start isEmpty. Operand 6234 states and 6590 transitions.
[2023-11-19 07:59:49,831 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 959
[2023-11-19 07:59:49,832 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-19 07:59:49,832 INFO  L195           NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:59:49,833 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2023-11-19 07:59:49,833 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:59:49,833 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:59:49,834 INFO  L85        PathProgramCache]: Analyzing trace with hash -612870874, now seen corresponding path program 1 times
[2023-11-19 07:59:49,834 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:59:49,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365483069]
[2023-11-19 07:59:49,834 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:59:49,834 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:59:50,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat