./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label57.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
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_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme --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 6b5f9be82810a895126d332df54c5a2750e68d4ab931247c71898627df874adb
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 11:56:04,400 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 11:56:04,536 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 11:56:04,543 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 11:56:04,544 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 11:56:04,584 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 11:56:04,585 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 11:56:04,586 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 11:56:04,587 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 11:56:04,592 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 11:56:04,593 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 11:56:04,593 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 11:56:04,594 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 11:56:04,596 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 11:56:04,596 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 11:56:04,597 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 11:56:04,597 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 11:56:04,597 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 11:56:04,598 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 11:56:04,598 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 11:56:04,599 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 11:56:04,599 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 11:56:04,600 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 11:56:04,600 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 11:56:04,601 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 11:56:04,601 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 11:56:04,601 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 11:56:04,602 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 11:56:04,603 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 11:56:04,603 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 11:56:04,605 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 11:56:04,605 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:56:04,605 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 11:56:04,605 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 11:56:04,606 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 11:56:04,606 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 11:56:04,606 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 11:56:04,606 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 11:56:04,607 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 11:56:04,607 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 11:56:04,607 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 11:56:04,608 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 11:56:04,608 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_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/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_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme
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 -> 6b5f9be82810a895126d332df54c5a2750e68d4ab931247c71898627df874adb
[2023-11-26 11:56:04,983 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 11:56:05,018 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 11:56:05,021 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 11:56:05,023 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 11:56:05,023 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 11:56:05,025 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem12_label57.c
[2023-11-26 11:56:08,336 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 11:56:08,994 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 11:56:08,995 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/sv-benchmarks/c/eca-rers2012/Problem12_label57.c
[2023-11-26 11:56:09,036 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/data/b4015cddd/e155d9961ffd40fa8e04ae172fd0c13c/FLAG927980fe7
[2023-11-26 11:56:09,054 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/data/b4015cddd/e155d9961ffd40fa8e04ae172fd0c13c
[2023-11-26 11:56:09,057 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 11:56:09,059 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 11:56:09,061 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 11:56:09,061 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 11:56:09,067 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 11:56:09,068 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:09" (1/1) ...
[2023-11-26 11:56:09,069 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7534343a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:09, skipping insertion in model container
[2023-11-26 11:56:09,070 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:09" (1/1) ...
[2023-11-26 11:56:09,270 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 11:56:09,779 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_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/sv-benchmarks/c/eca-rers2012/Problem12_label57.c[4795,4808]
[2023-11-26 11:56:11,170 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:56:11,201 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 11:56:11,231 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_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/sv-benchmarks/c/eca-rers2012/Problem12_label57.c[4795,4808]
[2023-11-26 11:56:11,991 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:56:12,027 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 11:56:12,028 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12 WrapperNode
[2023-11-26 11:56:12,028 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 11:56:12,030 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 11:56:12,030 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 11:56:12,030 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 11:56:12,041 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,121 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,577 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758
[2023-11-26 11:56:12,578 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 11:56:12,579 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 11:56:12,579 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 11:56:12,579 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 11:56:12,593 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,594 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,818 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,980 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-26 11:56:12,980 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:12,981 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,221 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,258 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,299 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,316 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,412 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 11:56:13,415 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 11:56:13,415 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 11:56:13,416 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 11:56:13,417 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (1/1) ...
[2023-11-26 11:56:13,424 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:56:13,440 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:56:13,463 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 11:56:13,483 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 11:56:13,514 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 11:56:13,515 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 11:56:13,515 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 11:56:13,515 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 11:56:13,632 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 11:56:13,638 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 11:56:19,681 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 11:56:19,770 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 11:56:19,771 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 11:56:19,773 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:19 BoogieIcfgContainer
[2023-11-26 11:56:19,773 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 11:56:19,777 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 11:56:19,777 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 11:56:19,781 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 11:56:19,781 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:56:09" (1/3) ...
[2023-11-26 11:56:19,782 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c5aa97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:19, skipping insertion in model container
[2023-11-26 11:56:19,783 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:12" (2/3) ...
[2023-11-26 11:56:19,785 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c5aa97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:19, skipping insertion in model container
[2023-11-26 11:56:19,785 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:19" (3/3) ...
[2023-11-26 11:56:19,787 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label57.c
[2023-11-26 11:56:19,809 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 11:56:19,810 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 11:56:19,911 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 11:56:19,919 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;@76e0e430, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 11:56:19,920 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 11:56:19,930 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:19,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-11-26 11:56:19,938 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:19,939 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:19,940 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:19,945 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:19,946 INFO  L85        PathProgramCache]: Analyzing trace with hash 497258078, now seen corresponding path program 1 times
[2023-11-26 11:56:19,956 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:19,957 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130211087]
[2023-11-26 11:56:19,957 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:19,958 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:20,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:20,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:56:20,151 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:20,151 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130211087]
[2023-11-26 11:56:20,152 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130211087] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:20,152 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:20,152 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:56:20,154 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327936073]
[2023-11-26 11:56:20,155 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:20,160 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-26 11:56:20,160 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:20,191 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-26 11:56:20,192 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:56:20,197 INFO  L87              Difference]: Start difference. First operand  has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:20,301 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:20,302 INFO  L93              Difference]: Finished difference Result 1511 states and 3005 transitions.
[2023-11-26 11:56:20,303 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-26 11:56:20,304 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36
[2023-11-26 11:56:20,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:20,326 INFO  L225             Difference]: With dead ends: 1511
[2023-11-26 11:56:20,326 INFO  L226             Difference]: Without dead ends: 754
[2023-11-26 11:56:20,333 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:56:20,337 INFO  L413           NwaCegarLoop]: 1438 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:20,338 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-26 11:56:20,360 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 754 states.
[2023-11-26 11:56:20,430 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754.
[2023-11-26 11:56:20,438 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:20,442 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions.
[2023-11-26 11:56:20,444 INFO  L78                 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 36
[2023-11-26 11:56:20,445 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:20,445 INFO  L495      AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions.
[2023-11-26 11:56:20,445 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:20,446 INFO  L276                IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions.
[2023-11-26 11:56:20,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-11-26 11:56:20,447 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:20,447 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:20,448 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 11:56:20,448 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:20,449 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:20,449 INFO  L85        PathProgramCache]: Analyzing trace with hash -283798902, now seen corresponding path program 1 times
[2023-11-26 11:56:20,449 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:20,450 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352938956]
[2023-11-26 11:56:20,450 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:20,450 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:20,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:20,671 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:56:20,672 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:20,672 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352938956]
[2023-11-26 11:56:20,673 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352938956] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:20,673 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:20,674 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:56:20,674 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027398884]
[2023-11-26 11:56:20,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:20,677 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:56:20,682 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:20,682 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:56:20,683 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:56:20,684 INFO  L87              Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand  has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:26,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:26,652 INFO  L93              Difference]: Finished difference Result 2258 states and 4311 transitions.
[2023-11-26 11:56:26,658 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:56:26,658 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36
[2023-11-26 11:56:26,659 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:26,672 INFO  L225             Difference]: With dead ends: 2258
[2023-11-26 11:56:26,672 INFO  L226             Difference]: Without dead ends: 1505
[2023-11-26 11:56:26,677 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
[2023-11-26 11:56:26,679 INFO  L413           NwaCegarLoop]: 466 mSDtfsCounter, 764 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:26,679 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 473 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time]
[2023-11-26 11:56:26,683 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1505 states.
[2023-11-26 11:56:26,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505.
[2023-11-26 11:56:26,759 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1505 states, 1504 states have (on average 1.6070478723404256) internal successors, (2417), 1504 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:26,780 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2417 transitions.
[2023-11-26 11:56:26,780 INFO  L78                 Accepts]: Start accepts. Automaton has 1505 states and 2417 transitions. Word has length 36
[2023-11-26 11:56:26,781 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:26,781 INFO  L495      AbstractCegarLoop]: Abstraction has 1505 states and 2417 transitions.
[2023-11-26 11:56:26,781 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:26,781 INFO  L276                IsEmpty]: Start isEmpty. Operand 1505 states and 2417 transitions.
[2023-11-26 11:56:26,786 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2023-11-26 11:56:26,787 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:26,787 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:26,787 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 11:56:26,788 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:26,788 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:26,789 INFO  L85        PathProgramCache]: Analyzing trace with hash 1967904036, now seen corresponding path program 1 times
[2023-11-26 11:56:26,789 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:26,789 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329157306]
[2023-11-26 11:56:26,789 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:26,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:26,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:27,007 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:56:27,008 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:27,008 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329157306]
[2023-11-26 11:56:27,010 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329157306] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:27,010 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:27,010 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:56:27,011 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023148032]
[2023-11-26 11:56:27,011 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:27,012 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:56:27,013 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:27,014 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:56:27,015 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:56:27,018 INFO  L87              Difference]: Start difference. First operand 1505 states and 2417 transitions. Second operand  has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:31,827 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:31,827 INFO  L93              Difference]: Finished difference Result 4511 states and 7248 transitions.
[2023-11-26 11:56:31,829 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:56:31,829 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 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 111
[2023-11-26 11:56:31,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:31,848 INFO  L225             Difference]: With dead ends: 4511
[2023-11-26 11:56:31,849 INFO  L226             Difference]: Without dead ends: 3007
[2023-11-26 11:56:31,855 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
[2023-11-26 11:56:31,857 INFO  L413           NwaCegarLoop]: 441 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:31,858 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 447 Invalid, 2931 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [935 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-11-26 11:56:31,863 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3007 states.
[2023-11-26 11:56:31,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 3007.
[2023-11-26 11:56:31,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3007 states, 3006 states have (on average 1.4158349966733201) internal successors, (4256), 3006 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:31,942 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 4256 transitions.
[2023-11-26 11:56:31,942 INFO  L78                 Accepts]: Start accepts. Automaton has 3007 states and 4256 transitions. Word has length 111
[2023-11-26 11:56:31,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:31,943 INFO  L495      AbstractCegarLoop]: Abstraction has 3007 states and 4256 transitions.
[2023-11-26 11:56:31,943 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:31,944 INFO  L276                IsEmpty]: Start isEmpty. Operand 3007 states and 4256 transitions.
[2023-11-26 11:56:31,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 114
[2023-11-26 11:56:31,947 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:31,947 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:31,947 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 11:56:31,948 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:31,949 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:31,949 INFO  L85        PathProgramCache]: Analyzing trace with hash -28970103, now seen corresponding path program 1 times
[2023-11-26 11:56:31,949 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:31,949 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468494169]
[2023-11-26 11:56:31,950 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:31,950 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:32,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:32,349 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:56:32,349 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:32,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468494169]
[2023-11-26 11:56:32,350 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468494169] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:32,350 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:32,350 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:56:32,351 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69936600]
[2023-11-26 11:56:32,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:32,351 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:56:32,352 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:32,352 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:56:32,353 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:56:32,353 INFO  L87              Difference]: Start difference. First operand 3007 states and 4256 transitions. Second operand  has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:39,052 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:39,052 INFO  L93              Difference]: Finished difference Result 9768 states and 13600 transitions.
[2023-11-26 11:56:39,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:56:39,053 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113
[2023-11-26 11:56:39,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:39,093 INFO  L225             Difference]: With dead ends: 9768
[2023-11-26 11:56:39,093 INFO  L226             Difference]: Without dead ends: 6762
[2023-11-26 11:56:39,099 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
[2023-11-26 11:56:39,100 INFO  L413           NwaCegarLoop]: 144 mSDtfsCounter, 2181 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4713 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:39,101 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2181 Valid, 162 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4713 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2023-11-26 11:56:39,110 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6762 states.
[2023-11-26 11:56:39,245 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6762 to 6762.
[2023-11-26 11:56:39,261 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6762 states, 6761 states have (on average 1.3511314894246413) internal successors, (9135), 6761 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:39,279 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 9135 transitions.
[2023-11-26 11:56:39,280 INFO  L78                 Accepts]: Start accepts. Automaton has 6762 states and 9135 transitions. Word has length 113
[2023-11-26 11:56:39,282 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:39,283 INFO  L495      AbstractCegarLoop]: Abstraction has 6762 states and 9135 transitions.
[2023-11-26 11:56:39,283 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:39,283 INFO  L276                IsEmpty]: Start isEmpty. Operand 6762 states and 9135 transitions.
[2023-11-26 11:56:39,293 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2023-11-26 11:56:39,293 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:39,293 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:39,294 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 11:56:39,294 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:39,295 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:39,295 INFO  L85        PathProgramCache]: Analyzing trace with hash -659062743, now seen corresponding path program 1 times
[2023-11-26 11:56:39,296 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:39,296 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036179599]
[2023-11-26 11:56:39,296 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:39,297 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:39,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:39,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2023-11-26 11:56:39,965 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:39,966 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036179599]
[2023-11-26 11:56:39,966 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036179599] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:56:39,966 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976759503]
[2023-11-26 11:56:39,966 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:39,967 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:56:39,967 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:56:39,972 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:56:40,009 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-26 11:56:40,106 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:40,108 INFO  L262         TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:56:40,117 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:56:40,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked.
[2023-11-26 11:56:40,462 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:56:40,462 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [976759503] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:40,463 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:56:40,463 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-26 11:56:40,463 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091530897]
[2023-11-26 11:56:40,463 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:40,464 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:56:40,464 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:40,465 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:56:40,465 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 11:56:40,465 INFO  L87              Difference]: Start difference. First operand 6762 states and 9135 transitions. Second operand  has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:44,459 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:44,460 INFO  L93              Difference]: Finished difference Result 18780 states and 25888 transitions.
[2023-11-26 11:56:44,460 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:56:44,460 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 177
[2023-11-26 11:56:44,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:44,523 INFO  L225             Difference]: With dead ends: 18780
[2023-11-26 11:56:44,524 INFO  L226             Difference]: Without dead ends: 12770
[2023-11-26 11:56:44,533 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 11:56:44,534 INFO  L413           NwaCegarLoop]: 604 mSDtfsCounter, 635 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:44,535 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 611 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2023-11-26 11:56:44,553 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12770 states.
[2023-11-26 11:56:44,762 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12770 to 12019.
[2023-11-26 11:56:44,785 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12019 states, 12018 states have (on average 1.2759194541521053) internal successors, (15334), 12018 states have internal predecessors, (15334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:44,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12019 states to 12019 states and 15334 transitions.
[2023-11-26 11:56:44,824 INFO  L78                 Accepts]: Start accepts. Automaton has 12019 states and 15334 transitions. Word has length 177
[2023-11-26 11:56:44,826 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:44,826 INFO  L495      AbstractCegarLoop]: Abstraction has 12019 states and 15334 transitions.
[2023-11-26 11:56:44,826 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:44,826 INFO  L276                IsEmpty]: Start isEmpty. Operand 12019 states and 15334 transitions.
[2023-11-26 11:56:44,829 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 189
[2023-11-26 11:56:44,830 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:44,830 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:56:44,847 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-26 11:56:45,036 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f9d5b6-c028-4579-ba09-6ed40e18ce20/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:56:45,037 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:45,038 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:45,039 INFO  L85        PathProgramCache]: Analyzing trace with hash -1130855293, now seen corresponding path program 1 times
[2023-11-26 11:56:45,039 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:45,039 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929817170]
[2023-11-26 11:56:45,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:45,040 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:45,082 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:45,543 INFO  L134       CoverageAnalysis]: Checked inductivity of 139 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-26 11:56:45,543 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:45,543 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929817170]
[2023-11-26 11:56:45,544 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929817170] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:45,544 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:45,544 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:56:45,547 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942120795]
[2023-11-26 11:56:45,547 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:45,548 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:56:45,548 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:45,549 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:56:45,549 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:56:45,549 INFO  L87              Difference]: Start difference. First operand 12019 states and 15334 transitions. Second operand  has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:50,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:56:50,445 INFO  L93              Difference]: Finished difference Result 27829 states and 35167 transitions.
[2023-11-26 11:56:50,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:56:50,452 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 188
[2023-11-26 11:56:50,453 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:56:50,515 INFO  L225             Difference]: With dead ends: 27829
[2023-11-26 11:56:50,515 INFO  L226             Difference]: Without dead ends: 16525
[2023-11-26 11:56:50,530 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
[2023-11-26 11:56:50,532 INFO  L413           NwaCegarLoop]: 692 mSDtfsCounter, 688 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2023-11-26 11:56:50,532 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 709 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2023-11-26 11:56:50,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16525 states.
[2023-11-26 11:56:50,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16525 to 15774.
[2023-11-26 11:56:50,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15774 states, 15773 states have (on average 1.2119444620554112) internal successors, (19116), 15773 states have internal predecessors, (19116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:50,926 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15774 states to 15774 states and 19116 transitions.
[2023-11-26 11:56:50,927 INFO  L78                 Accepts]: Start accepts. Automaton has 15774 states and 19116 transitions. Word has length 188
[2023-11-26 11:56:50,927 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:56:50,927 INFO  L495      AbstractCegarLoop]: Abstraction has 15774 states and 19116 transitions.
[2023-11-26 11:56:50,928 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:56:50,928 INFO  L276                IsEmpty]: Start isEmpty. Operand 15774 states and 19116 transitions.
[2023-11-26 11:56:50,932 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 249
[2023-11-26 11:56:50,932 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:56:50,933 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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]
[2023-11-26 11:56:50,933 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-26 11:56:50,933 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:56:50,934 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:56:50,934 INFO  L85        PathProgramCache]: Analyzing trace with hash -50694693, now seen corresponding path program 1 times
[2023-11-26 11:56:50,934 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:56:50,934 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841981787]
[2023-11-26 11:56:50,935 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:56:50,935 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:56:51,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:56:51,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 139 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2023-11-26 11:56:51,426 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:56:51,426 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841981787]
[2023-11-26 11:56:51,426 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841981787] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:56:51,427 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:56:51,427 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:56:51,427 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174057464]
[2023-11-26 11:56:51,427 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:56:51,428 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:56:51,428 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:56:51,429 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:56:51,429 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:56:51,429 INFO  L87              Difference]: Start difference. First operand 15774 states and 19116 transitions. Second operand  has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)