./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label20.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version cf1a7837
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl --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 702e32bde69e0b1ece4e7732f8bcc90ed2c9bf4432a02312b63f0298ad23fbb9
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-cf1a783
[2023-11-12 02:16:46,226 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-12 02:16:46,336 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-12 02:16:46,346 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-12 02:16:46,346 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-12 02:16:46,391 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-12 02:16:46,391 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-12 02:16:46,392 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-12 02:16:46,393 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-12 02:16:46,400 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-12 02:16:46,401 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-12 02:16:46,402 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-12 02:16:46,402 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-12 02:16:46,404 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-12 02:16:46,405 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-12 02:16:46,405 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-12 02:16:46,405 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-12 02:16:46,406 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-12 02:16:46,406 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-12 02:16:46,407 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-12 02:16:46,407 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-12 02:16:46,408 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-12 02:16:46,408 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-12 02:16:46,409 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-12 02:16:46,409 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-12 02:16:46,410 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-12 02:16:46,410 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-12 02:16:46,411 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-12 02:16:46,411 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:16:46,412 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-12 02:16:46,412 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-12 02:16:46,413 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-12 02:16:46,413 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-12 02:16:46,413 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-12 02:16:46,413 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-12 02:16:46,414 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-12 02:16:46,414 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-12 02:16:46,414 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-12 02:16:46,415 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-12 02:16:46,415 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_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/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_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl
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 -> 702e32bde69e0b1ece4e7732f8bcc90ed2c9bf4432a02312b63f0298ad23fbb9
[2023-11-12 02:16:46,700 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-12 02:16:46,723 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-12 02:16:46,725 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-12 02:16:46,727 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-12 02:16:46,727 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-12 02:16:46,729 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem12_label20.c
[2023-11-12 02:16:49,930 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-12 02:16:50,495 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-12 02:16:50,496 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/sv-benchmarks/c/eca-rers2012/Problem12_label20.c
[2023-11-12 02:16:50,539 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/data/422fdef48/bb445f4b703f41e193f6e1345793e17e/FLAG0f2b8f39d
[2023-11-12 02:16:50,557 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/data/422fdef48/bb445f4b703f41e193f6e1345793e17e
[2023-11-12 02:16:50,563 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-12 02:16:50,566 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-12 02:16:50,567 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-12 02:16:50,567 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-12 02:16:50,576 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-12 02:16:50,577 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:50" (1/1) ...
[2023-11-12 02:16:50,578 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bda8ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:50, skipping insertion in model container
[2023-11-12 02:16:50,578 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:50" (1/1) ...
[2023-11-12 02:16:50,741 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-12 02:16:50,968 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_a4622667-489a-4b2c-bd39-a49495336461/sv-benchmarks/c/eca-rers2012/Problem12_label20.c[1898,1911]
[2023-11-12 02:16:52,049 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:16:52,061 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-12 02:16:52,085 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_a4622667-489a-4b2c-bd39-a49495336461/sv-benchmarks/c/eca-rers2012/Problem12_label20.c[1898,1911]
[2023-11-12 02:16:52,713 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:16:52,740 INFO  L206         MainTranslator]: Completed translation
[2023-11-12 02:16:52,740 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52 WrapperNode
[2023-11-12 02:16:52,740 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-12 02:16:52,742 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-12 02:16:52,742 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-12 02:16:52,742 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-12 02:16:52,750 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:52,822 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,266 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758
[2023-11-12 02:16:53,266 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-12 02:16:53,267 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-12 02:16:53,267 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-12 02:16:53,268 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-12 02:16:53,278 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,279 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,340 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,341 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,538 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,575 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,636 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,654 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,732 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-12 02:16:53,733 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-12 02:16:53,733 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-12 02:16:53,733 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-12 02:16:53,734 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (1/1) ...
[2023-11-12 02:16:53,741 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:16:53,755 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:16:53,767 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-12 02:16:53,800 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-12 02:16:53,810 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-12 02:16:53,810 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-12 02:16:53,810 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-12 02:16:53,811 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-12 02:16:53,908 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-12 02:16:53,910 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-12 02:16:59,404 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-12 02:16:59,428 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-12 02:16:59,428 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-12 02:16:59,433 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:59 BoogieIcfgContainer
[2023-11-12 02:16:59,433 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-12 02:16:59,437 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-12 02:16:59,437 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-12 02:16:59,441 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-12 02:16:59,442 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:16:50" (1/3) ...
[2023-11-12 02:16:59,444 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbaefa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:59, skipping insertion in model container
[2023-11-12 02:16:59,444 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:52" (2/3) ...
[2023-11-12 02:16:59,446 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbaefa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:59, skipping insertion in model container
[2023-11-12 02:16:59,446 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:59" (3/3) ...
[2023-11-12 02:16:59,448 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label20.c
[2023-11-12 02:16:59,468 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-12 02:16:59,469 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-12 02:16:59,615 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-12 02:16:59,623 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;@2d51c861, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-12 02:16:59,623 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-12 02:16:59,634 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:16:59,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2023-11-12 02:16:59,641 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:16:59,642 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:16:59,642 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:16:59,649 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:16:59,649 INFO  L85        PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times
[2023-11-12 02:16:59,659 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:16:59,659 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273696908]
[2023-11-12 02:16:59,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:16:59,661 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:16:59,797 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:00,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:17:00,037 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:00,038 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273696908]
[2023-11-12 02:17:00,038 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273696908] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:00,039 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:17:00,039 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:17:00,041 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363468846]
[2023-11-12 02:17:00,041 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:00,046 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-12 02:17:00,047 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:00,091 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-12 02:17:00,092 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-12 02:17:00,100 INFO  L87              Difference]: Start difference. First operand  has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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)
[2023-11-12 02:17:08,519 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:08,519 INFO  L93              Difference]: Finished difference Result 3155 states and 6150 transitions.
[2023-11-12 02:17:08,520 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-12 02:17:08,521 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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
[2023-11-12 02:17:08,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:08,561 INFO  L225             Difference]: With dead ends: 3155
[2023-11-12 02:17:08,562 INFO  L226             Difference]: Without dead ends: 2265
[2023-11-12 02:17:08,569 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
[2023-11-12 02:17:08,573 INFO  L413           NwaCegarLoop]: 208 mSDtfsCounter, 2472 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 1719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2472 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1719 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:08,574 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2472 Valid, 234 Invalid, 5453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1719 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time]
[2023-11-12 02:17:08,598 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2265 states.
[2023-11-12 02:17:08,713 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257.
[2023-11-12 02:17:08,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:08,733 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions.
[2023-11-12 02:17:08,735 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 12
[2023-11-12 02:17:08,735 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:08,735 INFO  L495      AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions.
[2023-11-12 02:17:08,736 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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)
[2023-11-12 02:17:08,736 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions.
[2023-11-12 02:17:08,743 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2023-11-12 02:17:08,743 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:08,744 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:17:08,744 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-12 02:17:08,745 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:08,745 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:08,746 INFO  L85        PathProgramCache]: Analyzing trace with hash 478449383, now seen corresponding path program 1 times
[2023-11-12 02:17:08,746 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:08,746 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760392234]
[2023-11-12 02:17:08,747 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:08,747 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:08,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:09,505 INFO  L134       CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:17:09,505 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:09,506 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760392234]
[2023-11-12 02:17:09,506 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760392234] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:09,506 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:17:09,506 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:17:09,507 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397419491]
[2023-11-12 02:17:09,507 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:09,509 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-12 02:17:09,509 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:09,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-12 02:17:09,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-12 02:17:09,511 INFO  L87              Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand  has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:15,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:15,717 INFO  L93              Difference]: Finished difference Result 6051 states and 9664 transitions.
[2023-11-12 02:17:15,717 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-12 02:17:15,718 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152
[2023-11-12 02:17:15,718 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:15,740 INFO  L225             Difference]: With dead ends: 6051
[2023-11-12 02:17:15,741 INFO  L226             Difference]: Without dead ends: 3759
[2023-11-12 02:17:15,745 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
[2023-11-12 02:17:15,747 INFO  L413           NwaCegarLoop]: 694 mSDtfsCounter, 688 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:15,747 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 712 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time]
[2023-11-12 02:17:15,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3759 states.
[2023-11-12 02:17:15,823 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759.
[2023-11-12 02:17:15,831 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3759 states, 3758 states have (on average 1.3408728046833422) internal successors, (5039), 3758 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:15,841 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5039 transitions.
[2023-11-12 02:17:15,841 INFO  L78                 Accepts]: Start accepts. Automaton has 3759 states and 5039 transitions. Word has length 152
[2023-11-12 02:17:15,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:15,842 INFO  L495      AbstractCegarLoop]: Abstraction has 3759 states and 5039 transitions.
[2023-11-12 02:17:15,842 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:15,843 INFO  L276                IsEmpty]: Start isEmpty. Operand 3759 states and 5039 transitions.
[2023-11-12 02:17:15,847 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 223
[2023-11-12 02:17:15,848 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:15,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:17:15,848 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-12 02:17:15,849 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:15,849 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:15,850 INFO  L85        PathProgramCache]: Analyzing trace with hash -1010929610, now seen corresponding path program 1 times
[2023-11-12 02:17:15,850 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:15,850 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787376003]
[2023-11-12 02:17:15,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:15,851 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:16,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:16,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked.
[2023-11-12 02:17:16,293 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:16,294 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787376003]
[2023-11-12 02:17:16,294 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787376003] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:16,295 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:17:16,296 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:17:16,296 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341396956]
[2023-11-12 02:17:16,296 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:16,298 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:17:16,299 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:16,300 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:17:16,300 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:17:16,300 INFO  L87              Difference]: Start difference. First operand 3759 states and 5039 transitions. Second operand  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:20,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:20,146 INFO  L93              Difference]: Finished difference Result 10520 states and 14356 transitions.
[2023-11-12 02:17:20,146 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:17:20,147 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 222
[2023-11-12 02:17:20,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:20,244 INFO  L225             Difference]: With dead ends: 10520
[2023-11-12 02:17:20,244 INFO  L226             Difference]: Without dead ends: 6763
[2023-11-12 02:17:20,249 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
[2023-11-12 02:17:20,251 INFO  L413           NwaCegarLoop]: 480 mSDtfsCounter, 669 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:20,252 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 486 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2023-11-12 02:17:20,261 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2023-11-12 02:17:20,364 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6012.
[2023-11-12 02:17:20,375 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6012 states, 6011 states have (on average 1.2814839460988188) internal successors, (7703), 6011 states have internal predecessors, (7703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:20,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7703 transitions.
[2023-11-12 02:17:20,390 INFO  L78                 Accepts]: Start accepts. Automaton has 6012 states and 7703 transitions. Word has length 222
[2023-11-12 02:17:20,391 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:20,391 INFO  L495      AbstractCegarLoop]: Abstraction has 6012 states and 7703 transitions.
[2023-11-12 02:17:20,391 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:20,392 INFO  L276                IsEmpty]: Start isEmpty. Operand 6012 states and 7703 transitions.
[2023-11-12 02:17:20,395 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 236
[2023-11-12 02:17:20,396 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:20,396 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, 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]
[2023-11-12 02:17:20,396 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-12 02:17:20,397 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:20,397 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:20,397 INFO  L85        PathProgramCache]: Analyzing trace with hash -1499821391, now seen corresponding path program 1 times
[2023-11-12 02:17:20,398 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:20,398 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178813438]
[2023-11-12 02:17:20,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:20,399 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:20,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:20,918 INFO  L134       CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2023-11-12 02:17:20,919 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:20,919 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178813438]
[2023-11-12 02:17:20,919 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178813438] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:17:20,919 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362636896]
[2023-11-12 02:17:20,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:20,921 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:17:20,921 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:17:20,928 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:17:20,937 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-12 02:17:21,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:21,079 INFO  L262         TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-12 02:17:21,098 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:17:21,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:17:21,307 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:17:21,307 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362636896] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:21,307 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-12 02:17:21,308 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5
[2023-11-12 02:17:21,308 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209962031]
[2023-11-12 02:17:21,308 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:21,312 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:17:21,312 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:21,313 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:17:21,313 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-12 02:17:21,313 INFO  L87              Difference]: Start difference. First operand 6012 states and 7703 transitions. Second operand  has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:25,267 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:25,267 INFO  L93              Difference]: Finished difference Result 15026 states and 19934 transitions.
[2023-11-12 02:17:25,268 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:17:25,268 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 235
[2023-11-12 02:17:25,269 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:25,316 INFO  L225             Difference]: With dead ends: 15026
[2023-11-12 02:17:25,316 INFO  L226             Difference]: Without dead ends: 9016
[2023-11-12 02:17:25,324 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-12 02:17:25,326 INFO  L413           NwaCegarLoop]: 303 mSDtfsCounter, 908 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:25,326 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2023-11-12 02:17:25,340 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9016 states.
[2023-11-12 02:17:25,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016.
[2023-11-12 02:17:25,516 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9016 states, 9015 states have (on average 1.2657792567942319) internal successors, (11411), 9015 states have internal predecessors, (11411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:25,537 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11411 transitions.
[2023-11-12 02:17:25,537 INFO  L78                 Accepts]: Start accepts. Automaton has 9016 states and 11411 transitions. Word has length 235
[2023-11-12 02:17:25,538 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:25,539 INFO  L495      AbstractCegarLoop]: Abstraction has 9016 states and 11411 transitions.
[2023-11-12 02:17:25,539 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:25,539 INFO  L276                IsEmpty]: Start isEmpty. Operand 9016 states and 11411 transitions.
[2023-11-12 02:17:25,544 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 253
[2023-11-12 02:17:25,544 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:25,544 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:17:25,557 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-12 02:17:25,751 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4622667-489a-4b2c-bd39-a49495336461/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:17:25,751 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:25,752 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:25,752 INFO  L85        PathProgramCache]: Analyzing trace with hash -1043669525, now seen corresponding path program 1 times
[2023-11-12 02:17:25,752 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:25,754 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321632241]
[2023-11-12 02:17:25,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:25,754 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:25,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:26,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 117 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked.
[2023-11-12 02:17:26,040 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:26,040 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321632241]
[2023-11-12 02:17:26,040 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321632241] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:26,040 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:17:26,041 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:17:26,041 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401395681]
[2023-11-12 02:17:26,041 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:26,042 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:17:26,042 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:26,042 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:17:26,043 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:17:26,043 INFO  L87              Difference]: Start difference. First operand 9016 states and 11411 transitions. Second operand  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:30,494 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:30,495 INFO  L93              Difference]: Finished difference Result 25540 states and 32713 transitions.
[2023-11-12 02:17:30,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:17:30,495 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 252
[2023-11-12 02:17:30,496 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:30,552 INFO  L225             Difference]: With dead ends: 25540
[2023-11-12 02:17:30,552 INFO  L226             Difference]: Without dead ends: 16526
[2023-11-12 02:17:30,563 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
[2023-11-12 02:17:30,564 INFO  L413           NwaCegarLoop]: 1317 mSDtfsCounter, 746 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:30,564 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1325 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time]
[2023-11-12 02:17:30,586 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16526 states.
[2023-11-12 02:17:30,814 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15775.
[2023-11-12 02:17:30,847 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15775 states, 15774 states have (on average 1.2523773297831875) internal successors, (19755), 15774 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:30,883 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19755 transitions.
[2023-11-12 02:17:30,883 INFO  L78                 Accepts]: Start accepts. Automaton has 15775 states and 19755 transitions. Word has length 252
[2023-11-12 02:17:30,883 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:30,884 INFO  L495      AbstractCegarLoop]: Abstraction has 15775 states and 19755 transitions.
[2023-11-12 02:17:30,884 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:30,885 INFO  L276                IsEmpty]: Start isEmpty. Operand 15775 states and 19755 transitions.
[2023-11-12 02:17:30,890 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 302
[2023-11-12 02:17:30,890 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:30,891 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:17:30,892 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-12 02:17:30,892 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:30,893 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:30,893 INFO  L85        PathProgramCache]: Analyzing trace with hash -147603621, now seen corresponding path program 1 times
[2023-11-12 02:17:30,893 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:30,893 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181003818]
[2023-11-12 02:17:30,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:30,894 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:30,986 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:17:32,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 244 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2023-11-12 02:17:32,250 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:17:32,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181003818]
[2023-11-12 02:17:32,250 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181003818] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:17:32,250 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:17:32,250 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:17:32,251 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689616136]
[2023-11-12 02:17:32,251 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:17:32,251 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:17:32,252 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:17:32,256 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:17:32,258 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:17:32,259 INFO  L87              Difference]: Start difference. First operand 15775 states and 19755 transitions. Second operand  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:36,611 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:17:36,611 INFO  L93              Difference]: Finished difference Result 38307 states and 48288 transitions.
[2023-11-12 02:17:36,612 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:17:36,612 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 301
[2023-11-12 02:17:36,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:17:36,655 INFO  L225             Difference]: With dead ends: 38307
[2023-11-12 02:17:36,655 INFO  L226             Difference]: Without dead ends: 22534
[2023-11-12 02:17:36,669 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:17:36,671 INFO  L413           NwaCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2023-11-12 02:17:36,671 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time]
[2023-11-12 02:17:36,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22534 states.
[2023-11-12 02:17:36,956 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534.
[2023-11-12 02:17:36,985 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22534 states, 22533 states have (on average 1.2340567168153376) internal successors, (27807), 22533 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:37,017 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27807 transitions.
[2023-11-12 02:17:37,018 INFO  L78                 Accepts]: Start accepts. Automaton has 22534 states and 27807 transitions. Word has length 301
[2023-11-12 02:17:37,018 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:17:37,018 INFO  L495      AbstractCegarLoop]: Abstraction has 22534 states and 27807 transitions.
[2023-11-12 02:17:37,019 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:17:37,019 INFO  L276                IsEmpty]: Start isEmpty. Operand 22534 states and 27807 transitions.
[2023-11-12 02:17:37,024 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2023-11-12 02:17:37,025 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:17:37,025 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, 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]
[2023-11-12 02:17:37,025 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-12 02:17:37,026 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:17:37,026 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:17:37,026 INFO  L85        PathProgramCache]: Analyzing trace with hash -1068440000, now seen corresponding path program 1 times
[2023-11-12 02:17:37,026 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:17:37,027 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692814226]
[2023-11-12 02:17:37,027 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:17:37,027 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:17:37,103 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat