./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 22b009e1dde85f3dec0a8540aa6b279f8af7153fb7819134db61747ada71a0f6
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 23:12:01,756 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 23:12:01,879 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 23:12:01,889 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 23:12:01,890 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 23:12:01,935 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 23:12:01,936 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 23:12:01,937 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 23:12:01,938 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 23:12:01,944 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 23:12:01,945 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 23:12:01,946 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 23:12:01,946 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 23:12:01,948 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 23:12:01,949 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 23:12:01,949 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 23:12:01,950 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 23:12:01,950 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 23:12:01,951 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 23:12:01,951 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 23:12:01,952 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 23:12:01,953 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 23:12:01,954 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 23:12:01,954 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 23:12:01,955 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 23:12:01,955 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:12:01,956 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 23:12:01,956 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 23:12:01,957 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 23:12:01,957 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 23:12:01,958 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 23:12:01,959 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 23:12:01,959 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 23:12:01,959 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 23:12:01,960 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 23:12:01,960 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 23:12:01,960 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_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b009e1dde85f3dec0a8540aa6b279f8af7153fb7819134db61747ada71a0f6
[2023-11-06 23:12:02,336 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 23:12:02,375 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 23:12:02,378 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 23:12:02,380 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 23:12:02,381 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 23:12:02,383 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-06 23:12:05,842 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 23:12:06,435 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 23:12:06,435 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-06 23:12:06,469 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/data/3012d66d2/07c131cb0f604caaa294dcb7a2bb7268/FLAGb885c302a
[2023-11-06 23:12:06,492 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/data/3012d66d2/07c131cb0f604caaa294dcb7a2bb7268
[2023-11-06 23:12:06,500 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 23:12:06,502 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 23:12:06,508 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 23:12:06,510 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 23:12:06,516 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 23:12:06,517 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:06" (1/1) ...
[2023-11-06 23:12:06,518 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2791164d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:06, skipping insertion in model container
[2023-11-06 23:12:06,518 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:06" (1/1) ...
[2023-11-06 23:12:06,668 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 23:12:06,986 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_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c[1174,1187]
[2023-11-06 23:12:07,903 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:12:07,915 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 23:12:07,929 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_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c[1174,1187]
[2023-11-06 23:12:08,491 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:12:08,508 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 23:12:08,509 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08 WrapperNode
[2023-11-06 23:12:08,509 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 23:12:08,510 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 23:12:08,510 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 23:12:08,511 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 23:12:08,519 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:08,723 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:11,911 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24242
[2023-11-06 23:12:11,917 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 23:12:11,918 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 23:12:11,918 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 23:12:11,919 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 23:12:11,928 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:11,929 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:13,062 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:13,063 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:13,955 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:14,128 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:14,370 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:14,476 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:14,912 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 23:12:14,915 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 23:12:14,915 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 23:12:14,915 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 23:12:14,916 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (1/1) ...
[2023-11-06 23:12:14,925 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:12:14,940 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:14,958 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 23:12:15,253 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 23:12:15,274 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 23:12:15,274 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 23:12:15,275 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 23:12:15,276 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 23:12:16,396 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 23:12:16,399 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 23:12:33,959 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 23:12:34,016 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 23:12:34,016 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 23:12:34,024 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:34 BoogieIcfgContainer
[2023-11-06 23:12:34,024 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 23:12:34,027 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 23:12:34,028 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 23:12:34,032 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 23:12:34,033 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:12:06" (1/3) ...
[2023-11-06 23:12:34,035 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5f8db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:34, skipping insertion in model container
[2023-11-06 23:12:34,035 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:08" (2/3) ...
[2023-11-06 23:12:34,036 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5f8db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:34, skipping insertion in model container
[2023-11-06 23:12:34,038 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:34" (3/3) ...
[2023-11-06 23:12:34,040 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-06 23:12:34,060 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 23:12:34,061 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 23:12:34,234 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 23:12:34,243 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b08ad39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 23:12:34,244 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 23:12:34,269 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5791 states, 5789 states have (on average 1.6705821385386077) internal successors, (9671), 5790 states have internal predecessors, (9671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:34,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 316
[2023-11-06 23:12:34,320 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:34,322 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:12:34,323 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:34,329 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:34,330 INFO  L85        PathProgramCache]: Analyzing trace with hash 1262110170, now seen corresponding path program 1 times
[2023-11-06 23:12:34,343 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:34,345 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546943638]
[2023-11-06 23:12:34,345 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:34,346 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:34,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:36,867 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:36,868 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:36,868 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546943638]
[2023-11-06 23:12:36,869 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546943638] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:36,869 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:36,870 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:12:36,872 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958712083]
[2023-11-06 23:12:36,873 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:36,879 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:12:36,879 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:36,912 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:12:36,913 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:36,929 INFO  L87              Difference]: Start difference. First operand  has 5791 states, 5789 states have (on average 1.6705821385386077) internal successors, (9671), 5790 states have internal predecessors, (9671), 0 states have call successors, (0), 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 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:37,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:37,370 INFO  L93              Difference]: Finished difference Result 11401 states and 19045 transitions.
[2023-11-06 23:12:37,372 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:12:37,374 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 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 315
[2023-11-06 23:12:37,380 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:37,443 INFO  L225             Difference]: With dead ends: 11401
[2023-11-06 23:12:37,443 INFO  L226             Difference]: Without dead ends: 5789
[2023-11-06 23:12:37,464 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:37,469 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 1 mSDsluCounter, 19320 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28983 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:37,471 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28983 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:12:37,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5789 states.
[2023-11-06 23:12:37,684 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 5789.
[2023-11-06 23:12:37,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5789 states, 5788 states have (on average 1.6701796821008985) internal successors, (9667), 5788 states have internal predecessors, (9667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:37,732 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5789 states to 5789 states and 9667 transitions.
[2023-11-06 23:12:37,734 INFO  L78                 Accepts]: Start accepts. Automaton has 5789 states and 9667 transitions. Word has length 315
[2023-11-06 23:12:37,738 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:37,739 INFO  L495      AbstractCegarLoop]: Abstraction has 5789 states and 9667 transitions.
[2023-11-06 23:12:37,740 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:37,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 5789 states and 9667 transitions.
[2023-11-06 23:12:37,910 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 317
[2023-11-06 23:12:37,910 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:37,910 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:12:37,911 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 23:12:37,911 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:37,912 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:37,912 INFO  L85        PathProgramCache]: Analyzing trace with hash 472436414, now seen corresponding path program 1 times
[2023-11-06 23:12:37,912 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:37,912 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784391533]
[2023-11-06 23:12:37,913 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:37,913 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:38,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:38,885 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:38,885 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:38,886 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784391533]
[2023-11-06 23:12:38,887 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784391533] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:38,887 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:38,887 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:12:38,888 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940579453]
[2023-11-06 23:12:38,888 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:38,892 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:12:38,893 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:38,894 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:12:38,894 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:38,895 INFO  L87              Difference]: Start difference. First operand 5789 states and 9667 transitions. Second operand  has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:39,317 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:39,317 INFO  L93              Difference]: Finished difference Result 11402 states and 19041 transitions.
[2023-11-06 23:12:39,318 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:12:39,318 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 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 316
[2023-11-06 23:12:39,319 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:39,352 INFO  L225             Difference]: With dead ends: 11402
[2023-11-06 23:12:39,352 INFO  L226             Difference]: Without dead ends: 5792
[2023-11-06 23:12:39,359 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:39,360 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 1 mSDsluCounter, 19317 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28980 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:39,361 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28980 Invalid, 14 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:12:39,374 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5792 states.
[2023-11-06 23:12:39,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 5791.
[2023-11-06 23:12:39,499 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5791 states, 5790 states have (on average 1.6699481865284973) internal successors, (9669), 5790 states have internal predecessors, (9669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:39,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 9669 transitions.
[2023-11-06 23:12:39,529 INFO  L78                 Accepts]: Start accepts. Automaton has 5791 states and 9669 transitions. Word has length 316
[2023-11-06 23:12:39,530 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:39,530 INFO  L495      AbstractCegarLoop]: Abstraction has 5791 states and 9669 transitions.
[2023-11-06 23:12:39,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:39,531 INFO  L276                IsEmpty]: Start isEmpty. Operand 5791 states and 9669 transitions.
[2023-11-06 23:12:39,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 318
[2023-11-06 23:12:39,537 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:39,537 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:12:39,537 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 23:12:39,538 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:39,538 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:39,539 INFO  L85        PathProgramCache]: Analyzing trace with hash -969763594, now seen corresponding path program 1 times
[2023-11-06 23:12:39,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:39,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405036912]
[2023-11-06 23:12:39,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:39,540 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:39,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:40,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:40,361 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:40,361 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405036912]
[2023-11-06 23:12:40,361 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405036912] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:40,362 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:40,362 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 23:12:40,362 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894212487]
[2023-11-06 23:12:40,362 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:40,363 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:12:40,364 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:40,365 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:12:40,365 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:12:40,366 INFO  L87              Difference]: Start difference. First operand 5791 states and 9669 transitions. Second operand  has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:41,021 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:41,021 INFO  L93              Difference]: Finished difference Result 17015 states and 28414 transitions.
[2023-11-06 23:12:41,022 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-06 23:12:41,022 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 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 317
[2023-11-06 23:12:41,023 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:41,088 INFO  L225             Difference]: With dead ends: 17015
[2023-11-06 23:12:41,089 INFO  L226             Difference]: Without dead ends: 11403
[2023-11-06 23:12:41,099 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:12:41,100 INFO  L413           NwaCegarLoop]: 10131 mSDtfsCounter, 18722 mSDsluCounter, 29448 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18722 SdHoareTripleChecker+Valid, 39579 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:41,101 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18722 Valid, 39579 Invalid, 28 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:41,121 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11403 states.
[2023-11-06 23:12:41,268 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 5796.
[2023-11-06 23:12:41,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5796 states, 5795 states have (on average 1.6697152717860224) internal successors, (9676), 5795 states have internal predecessors, (9676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:41,315 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 9676 transitions.
[2023-11-06 23:12:41,315 INFO  L78                 Accepts]: Start accepts. Automaton has 5796 states and 9676 transitions. Word has length 317
[2023-11-06 23:12:41,316 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:41,317 INFO  L495      AbstractCegarLoop]: Abstraction has 5796 states and 9676 transitions.
[2023-11-06 23:12:41,319 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:41,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 5796 states and 9676 transitions.
[2023-11-06 23:12:41,328 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2023-11-06 23:12:41,328 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:41,329 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:12:41,330 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 23:12:41,331 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:41,331 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:41,332 INFO  L85        PathProgramCache]: Analyzing trace with hash 165647820, now seen corresponding path program 1 times
[2023-11-06 23:12:41,332 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:41,332 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511188021]
[2023-11-06 23:12:41,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:41,333 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:41,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:42,367 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:42,367 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:42,368 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511188021]
[2023-11-06 23:12:42,368 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511188021] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:42,368 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:42,369 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 23:12:42,369 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227033319]
[2023-11-06 23:12:42,369 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:42,370 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:12:42,370 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:42,371 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:12:42,371 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:12:42,372 INFO  L87              Difference]: Start difference. First operand 5796 states and 9676 transitions. Second operand  has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:43,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:43,010 INFO  L93              Difference]: Finished difference Result 17293 states and 28874 transitions.
[2023-11-06 23:12:43,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:12:43,011 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 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 318
[2023-11-06 23:12:43,013 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:43,058 INFO  L225             Difference]: With dead ends: 17293
[2023-11-06 23:12:43,058 INFO  L226             Difference]: Without dead ends: 11676
[2023-11-06 23:12:43,069 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 23:12:43,081 INFO  L413           NwaCegarLoop]: 10120 mSDtfsCounter, 37892 mSDsluCounter, 19316 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37892 SdHoareTripleChecker+Valid, 29436 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:43,082 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37892 Valid, 29436 Invalid, 20 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:43,105 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11676 states.
[2023-11-06 23:12:43,267 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11676 to 6074.
[2023-11-06 23:12:43,280 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6074 states, 6073 states have (on average 1.6693561666392227) internal successors, (10138), 6073 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:43,299 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6074 states to 6074 states and 10138 transitions.
[2023-11-06 23:12:43,300 INFO  L78                 Accepts]: Start accepts. Automaton has 6074 states and 10138 transitions. Word has length 318
[2023-11-06 23:12:43,301 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:43,301 INFO  L495      AbstractCegarLoop]: Abstraction has 6074 states and 10138 transitions.
[2023-11-06 23:12:43,301 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:43,302 INFO  L276                IsEmpty]: Start isEmpty. Operand 6074 states and 10138 transitions.
[2023-11-06 23:12:43,653 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:12:43,654 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:43,657 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:12:43,657 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-06 23:12:43,658 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:43,658 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:43,660 INFO  L85        PathProgramCache]: Analyzing trace with hash 259434831, now seen corresponding path program 1 times
[2023-11-06 23:12:43,661 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:43,661 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69085234]
[2023-11-06 23:12:43,662 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:43,662 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:44,239 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:44,240 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949024664]
[2023-11-06 23:12:44,241 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:44,241 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:44,242 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:44,245 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:44,271 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 23:12:49,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:49,990 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16292 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:12:50,110 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:50,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:50,361 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:50,361 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:50,361 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69085234]
[2023-11-06 23:12:50,361 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:50,361 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949024664]
[2023-11-06 23:12:50,362 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949024664] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:50,364 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:50,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:12:50,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337373229]
[2023-11-06 23:12:50,365 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:50,371 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:12:50,371 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:50,377 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:12:50,377 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:50,379 INFO  L87              Difference]: Start difference. First operand 6074 states and 10138 transitions. Second operand  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:50,695 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:50,695 INFO  L93              Difference]: Finished difference Result 11701 states and 19533 transitions.
[2023-11-06 23:12:50,696 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:12:50,697 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 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 3933
[2023-11-06 23:12:50,699 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:50,715 INFO  L225             Difference]: With dead ends: 11701
[2023-11-06 23:12:50,715 INFO  L226             Difference]: Without dead ends: 6084
[2023-11-06 23:12:50,726 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:50,727 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 12 mSDsluCounter, 19314 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28977 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:50,728 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28977 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:12:50,739 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6084 states.
[2023-11-06 23:12:50,839 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 6076.
[2023-11-06 23:12:50,851 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6076 states, 6075 states have (on average 1.6691358024691358) internal successors, (10140), 6075 states have internal predecessors, (10140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:50,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6076 states to 6076 states and 10140 transitions.
[2023-11-06 23:12:50,868 INFO  L78                 Accepts]: Start accepts. Automaton has 6076 states and 10140 transitions. Word has length 3933
[2023-11-06 23:12:50,870 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:50,871 INFO  L495      AbstractCegarLoop]: Abstraction has 6076 states and 10140 transitions.
[2023-11-06 23:12:50,873 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:50,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 6076 states and 10140 transitions.
[2023-11-06 23:12:50,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:12:50,996 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:51,000 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:12:51,063 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:51,214 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:51,215 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:51,215 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:51,217 INFO  L85        PathProgramCache]: Analyzing trace with hash -1829849699, now seen corresponding path program 1 times
[2023-11-06 23:12:51,217 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:51,218 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068282058]
[2023-11-06 23:12:51,218 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:51,219 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:51,729 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:51,730 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20909836]
[2023-11-06 23:12:51,731 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:51,731 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:51,732 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:51,733 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:51,757 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 23:12:57,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:57,219 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16293 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:12:57,313 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:57,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:12:57,625 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:12:57,625 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:57,626 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068282058]
[2023-11-06 23:12:57,631 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:57,631 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20909836]
[2023-11-06 23:12:57,631 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [20909836] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:12:57,632 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:12:57,633 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:12:57,633 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758453258]
[2023-11-06 23:12:57,634 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:57,641 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:12:57,641 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:57,648 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:12:57,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:57,655 INFO  L87              Difference]: Start difference. First operand 6076 states and 10140 transitions. Second operand  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:58,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:58,010 INFO  L93              Difference]: Finished difference Result 11704 states and 19535 transitions.
[2023-11-06 23:12:58,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:12:58,013 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 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 3933
[2023-11-06 23:12:58,015 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:58,029 INFO  L225             Difference]: With dead ends: 11704
[2023-11-06 23:12:58,029 INFO  L226             Difference]: Without dead ends: 6085
[2023-11-06 23:12:58,038 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:12:58,040 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 12 mSDsluCounter, 19314 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28977 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:58,040 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28977 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:12:58,052 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6085 states.
[2023-11-06 23:12:58,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 6077.
[2023-11-06 23:12:58,170 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6077 states, 6076 states have (on average 1.6690256747860435) internal successors, (10141), 6076 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:58,192 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 10141 transitions.
[2023-11-06 23:12:58,192 INFO  L78                 Accepts]: Start accepts. Automaton has 6077 states and 10141 transitions. Word has length 3933
[2023-11-06 23:12:58,195 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:58,195 INFO  L495      AbstractCegarLoop]: Abstraction has 6077 states and 10141 transitions.
[2023-11-06 23:12:58,197 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:12:58,198 INFO  L276                IsEmpty]: Start isEmpty. Operand 6077 states and 10141 transitions.
[2023-11-06 23:12:58,438 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:12:58,438 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:58,441 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:12:58,499 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:58,655 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 23:12:58,655 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:58,656 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:58,657 INFO  L85        PathProgramCache]: Analyzing trace with hash -682866965, now seen corresponding path program 1 times
[2023-11-06 23:12:58,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:58,658 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746254151]
[2023-11-06 23:12:58,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:58,658 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:59,353 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:59,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041350667]
[2023-11-06 23:12:59,355 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:59,355 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:59,355 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:59,357 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:59,370 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 23:13:04,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:04,630 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16294 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:13:04,726 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:04,875 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:13:04,875 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:04,875 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:04,876 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746254151]
[2023-11-06 23:13:04,876 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:04,876 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041350667]
[2023-11-06 23:13:04,876 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041350667] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:04,876 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:04,878 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:13:04,878 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741890141]
[2023-11-06 23:13:04,878 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:04,883 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:13:04,883 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:04,889 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:13:04,890 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:04,891 INFO  L87              Difference]: Start difference. First operand 6077 states and 10141 transitions. Second operand  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:05,154 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:05,155 INFO  L93              Difference]: Finished difference Result 11706 states and 19537 transitions.
[2023-11-06 23:13:05,155 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:13:05,157 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 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 3933
[2023-11-06 23:13:05,161 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:05,174 INFO  L225             Difference]: With dead ends: 11706
[2023-11-06 23:13:05,174 INFO  L226             Difference]: Without dead ends: 6086
[2023-11-06 23:13:05,182 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:05,184 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 12 mSDsluCounter, 19314 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28977 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:05,184 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28977 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:13:05,194 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6086 states.
[2023-11-06 23:13:05,286 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 6078.
[2023-11-06 23:13:05,296 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6078 states, 6077 states have (on average 1.6689155833470461) internal successors, (10142), 6077 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:05,314 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 10142 transitions.
[2023-11-06 23:13:05,314 INFO  L78                 Accepts]: Start accepts. Automaton has 6078 states and 10142 transitions. Word has length 3933
[2023-11-06 23:13:05,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:05,318 INFO  L495      AbstractCegarLoop]: Abstraction has 6078 states and 10142 transitions.
[2023-11-06 23:13:05,320 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:05,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 6078 states and 10142 transitions.
[2023-11-06 23:13:05,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:13:05,637 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:05,640 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:13:05,704 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:05,867 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:05,867 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:05,868 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:05,870 INFO  L85        PathProgramCache]: Analyzing trace with hash 2000011229, now seen corresponding path program 1 times
[2023-11-06 23:13:05,870 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:05,870 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292799788]
[2023-11-06 23:13:05,870 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:05,871 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:06,331 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:06,332 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087194647]
[2023-11-06 23:13:06,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:06,334 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:06,334 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:06,335 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:06,345 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 23:13:11,225 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:11,330 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16295 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:13:11,576 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:11,735 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:13:11,735 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:11,735 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:11,736 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292799788]
[2023-11-06 23:13:11,736 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:11,736 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087194647]
[2023-11-06 23:13:11,736 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087194647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:11,736 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:11,738 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:13:11,738 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726229121]
[2023-11-06 23:13:11,739 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:11,744 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:13:11,745 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:11,750 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:13:11,751 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:11,753 INFO  L87              Difference]: Start difference. First operand 6078 states and 10142 transitions. Second operand  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:12,011 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:12,011 INFO  L93              Difference]: Finished difference Result 11708 states and 19539 transitions.
[2023-11-06 23:13:12,012 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:13:12,014 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 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 3933
[2023-11-06 23:13:12,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:12,032 INFO  L225             Difference]: With dead ends: 11708
[2023-11-06 23:13:12,032 INFO  L226             Difference]: Without dead ends: 6087
[2023-11-06 23:13:12,040 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:12,042 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 12 mSDsluCounter, 19314 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28977 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:12,043 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28977 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:13:12,052 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6087 states.
[2023-11-06 23:13:12,144 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 6079.
[2023-11-06 23:13:12,154 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6079 states, 6078 states have (on average 1.6688055281342546) internal successors, (10143), 6078 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:12,172 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 10143 transitions.
[2023-11-06 23:13:12,173 INFO  L78                 Accepts]: Start accepts. Automaton has 6079 states and 10143 transitions. Word has length 3933
[2023-11-06 23:13:12,176 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:12,176 INFO  L495      AbstractCegarLoop]: Abstraction has 6079 states and 10143 transitions.
[2023-11-06 23:13:12,178 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:12,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 6079 states and 10143 transitions.
[2023-11-06 23:13:12,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:13:12,386 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:12,389 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 23:13:12,451 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:12,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:12,615 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:12,616 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:12,617 INFO  L85        PathProgramCache]: Analyzing trace with hash -496528433, now seen corresponding path program 1 times
[2023-11-06 23:13:12,618 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:12,618 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255580819]
[2023-11-06 23:13:12,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:12,618 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:12,985 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:12,985 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684056]
[2023-11-06 23:13:12,987 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:12,987 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:12,987 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:12,988 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:13,011 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 23:13:17,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:18,045 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16296 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 23:13:18,106 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:18,254 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:13:18,255 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:18,255 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:18,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255580819]
[2023-11-06 23:13:18,255 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:18,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684056]
[2023-11-06 23:13:18,256 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684056] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:18,256 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:18,257 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:13:18,257 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738034872]
[2023-11-06 23:13:18,258 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:18,263 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:13:18,263 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:18,268 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:13:18,269 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:18,270 INFO  L87              Difference]: Start difference. First operand 6079 states and 10143 transitions. Second operand  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:18,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:18,495 INFO  L93              Difference]: Finished difference Result 11710 states and 19541 transitions.
[2023-11-06 23:13:18,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:13:18,498 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 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 3933
[2023-11-06 23:13:18,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:18,516 INFO  L225             Difference]: With dead ends: 11710
[2023-11-06 23:13:18,517 INFO  L226             Difference]: Without dead ends: 6088
[2023-11-06 23:13:18,525 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:13:18,528 INFO  L413           NwaCegarLoop]: 9663 mSDtfsCounter, 12 mSDsluCounter, 19314 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28977 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:18,528 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28977 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 23:13:18,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6088 states.
[2023-11-06 23:13:18,694 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6088 to 6080.
[2023-11-06 23:13:18,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6080 states, 6079 states have (on average 1.668695509129791) internal successors, (10144), 6079 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:18,719 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10144 transitions.
[2023-11-06 23:13:18,720 INFO  L78                 Accepts]: Start accepts. Automaton has 6080 states and 10144 transitions. Word has length 3933
[2023-11-06 23:13:18,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:18,724 INFO  L495      AbstractCegarLoop]: Abstraction has 6080 states and 10144 transitions.
[2023-11-06 23:13:18,725 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.25) internal successors, (3933), 4 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:18,725 INFO  L276                IsEmpty]: Start isEmpty. Operand 6080 states and 10144 transitions.
[2023-11-06 23:13:18,850 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-06 23:13:18,850 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:18,854 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:13:18,911 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:19,071 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:19,071 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:19,072 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:19,073 INFO  L85        PathProgramCache]: Analyzing trace with hash -409813823, now seen corresponding path program 1 times
[2023-11-06 23:13:19,073 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:19,073 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119131513]
[2023-11-06 23:13:19,074 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:19,074 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:19,424 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:19,424 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571701682]
[2023-11-06 23:13:19,425 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:19,426 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:19,426 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:19,432 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:19,459 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 23:13:24,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:24,881 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16297 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:13:24,972 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:25,445 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked.
[2023-11-06 23:13:25,445 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 23:13:25,445 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:13:25,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119131513]
[2023-11-06 23:13:25,446 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:13:25,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571701682]
[2023-11-06 23:13:25,446 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571701682] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:13:25,446 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:13:25,447 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 23:13:25,448 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526869968]
[2023-11-06 23:13:25,448 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:13:25,453 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 23:13:25,454 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:13:25,460 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 23:13:25,460 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 23:13:25,462 INFO  L87              Difference]: Start difference. First operand 6080 states and 10144 transitions. Second operand  has 7 states, 7 states have (on average 535.2857142857143) internal successors, (3747), 7 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:26,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:13:26,210 INFO  L93              Difference]: Finished difference Result 17315 states and 28896 transitions.
[2023-11-06 23:13:26,211 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-06 23:13:26,212 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 535.2857142857143) internal successors, (3747), 7 states have internal predecessors, (3747), 0 states have call successors, (0), 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 3933
[2023-11-06 23:13:26,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:13:26,252 INFO  L225             Difference]: With dead ends: 17315
[2023-11-06 23:13:26,252 INFO  L226             Difference]: Without dead ends: 11692
[2023-11-06 23:13:26,261 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3941 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-06 23:13:26,262 INFO  L413           NwaCegarLoop]: 10123 mSDtfsCounter, 27798 mSDsluCounter, 40009 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27798 SdHoareTripleChecker+Valid, 50132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-06 23:13:26,263 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27798 Valid, 50132 Invalid, 45 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-06 23:13:26,282 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11692 states.
[2023-11-06 23:13:26,392 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11692 to 6080.
[2023-11-06 23:13:26,399 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6080 states, 6079 states have (on average 1.668695509129791) internal successors, (10144), 6079 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:26,415 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10144 transitions.
[2023-11-06 23:13:26,415 INFO  L78                 Accepts]: Start accepts. Automaton has 6080 states and 10144 transitions. Word has length 3933
[2023-11-06 23:13:26,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:13:26,422 INFO  L495      AbstractCegarLoop]: Abstraction has 6080 states and 10144 transitions.
[2023-11-06 23:13:26,424 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 535.2857142857143) internal successors, (3747), 7 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 23:13:26,424 INFO  L276                IsEmpty]: Start isEmpty. Operand 6080 states and 10144 transitions.
[2023-11-06 23:13:26,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3935
[2023-11-06 23:13:26,559 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:13:26,562 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 23:13:26,621 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 23:13:26,775 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 23:13:26,775 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:13:26,776 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:13:26,777 INFO  L85        PathProgramCache]: Analyzing trace with hash 69968699, now seen corresponding path program 1 times
[2023-11-06 23:13:26,777 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:13:26,777 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488545529]
[2023-11-06 23:13:26,778 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:26,778 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:13:27,147 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:13:27,147 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27433604]
[2023-11-06 23:13:27,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:13:27,149 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:13:27,149 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:13:27,152 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:13:27,179 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e16f2ed-c61c-4a3c-b225-9bc3ce4469a2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 23:13:32,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:13:32,222 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16300 conjuncts, 41 conjunts are in the unsatisfiable core
[2023-11-06 23:13:32,303 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:13:46,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:13:46,312 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:14:08,268 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 180 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 23:14:08,268 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:14:08,269 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488545529]
[2023-11-06 23:14:08,269 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:14:08,269 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27433604]
[2023-11-06 23:14:08,269 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [27433604] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-06 23:14:08,269 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-06 23:14:08,272 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29
[2023-11-06 23:14:08,272 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489742396]
[2023-11-06 23:14:08,272 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-06 23:14:08,283 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2023-11-06 23:14:08,283 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:14:08,297 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2023-11-06 23:14:08,298 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812
[2023-11-06 23:14:08,301 INFO  L87              Difference]: Start difference. First operand 6080 states and 10144 transitions. Second operand  has 29 states, 29 states have (on average 270.8965517241379) internal successors, (7856), 29 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)