./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version cf1a7837
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 55551975c39567cc0af997a25b5a60ed7bf159e5142253b0ae97d8bdefe29048
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-cf1a783
[2023-11-12 02:23:11,118 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-12 02:23:11,237 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-12 02:23:11,253 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-12 02:23:11,253 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-12 02:23:11,308 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-12 02:23:11,309 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-12 02:23:11,310 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-12 02:23:11,311 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-12 02:23:11,317 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-12 02:23:11,318 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-12 02:23:11,319 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-12 02:23:11,319 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-12 02:23:11,321 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-12 02:23:11,322 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-12 02:23:11,323 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-12 02:23:11,323 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-12 02:23:11,324 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-12 02:23:11,324 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-12 02:23:11,325 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-12 02:23:11,326 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-12 02:23:11,327 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-12 02:23:11,327 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-12 02:23:11,328 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-12 02:23:11,328 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-12 02:23:11,329 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-12 02:23:11,330 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-12 02:23:11,331 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-12 02:23:11,331 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:23:11,332 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-12 02:23:11,333 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-12 02:23:11,334 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-12 02:23:11,334 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-12 02:23:11,335 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-12 02:23:11,335 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-12 02:23:11,335 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-12 02:23:11,336 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-12 02:23:11,336 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-12 02:23:11,337 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-12 02:23:11,337 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_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55551975c39567cc0af997a25b5a60ed7bf159e5142253b0ae97d8bdefe29048
[2023-11-12 02:23:11,702 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-12 02:23:11,742 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-12 02:23:11,745 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-12 02:23:11,747 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-12 02:23:11,747 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-12 02:23:11,749 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i
[2023-11-12 02:23:15,136 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-12 02:23:15,509 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-12 02:23:15,510 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i
[2023-11-12 02:23:15,521 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/data/feeaacff5/79306c2af76243399a784e82aa64da3d/FLAG5234f2316
[2023-11-12 02:23:15,540 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/data/feeaacff5/79306c2af76243399a784e82aa64da3d
[2023-11-12 02:23:15,547 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-12 02:23:15,549 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-12 02:23:15,554 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-12 02:23:15,554 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-12 02:23:15,560 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-12 02:23:15,563 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:15" (1/1) ...
[2023-11-12 02:23:15,564 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c50285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:15, skipping insertion in model container
[2023-11-12 02:23:15,565 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:15" (1/1) ...
[2023-11-12 02:23:15,621 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-12 02:23:15,800 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_4a773ed2-027d-4d11-a0fc-359a78e94982/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i[919,932]
[2023-11-12 02:23:15,880 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:23:15,900 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-12 02:23:15,916 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_4a773ed2-027d-4d11-a0fc-359a78e94982/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i[919,932]
[2023-11-12 02:23:16,002 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:23:16,026 INFO  L206         MainTranslator]: Completed translation
[2023-11-12 02:23:16,027 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16 WrapperNode
[2023-11-12 02:23:16,027 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-12 02:23:16,030 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-12 02:23:16,030 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-12 02:23:16,030 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-12 02:23:16,038 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,052 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,109 INFO  L138                Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 225
[2023-11-12 02:23:16,109 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-12 02:23:16,110 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-12 02:23:16,110 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-12 02:23:16,111 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-12 02:23:16,120 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,121 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,126 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,127 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,145 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,151 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,156 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,160 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,167 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-12 02:23:16,169 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-12 02:23:16,169 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-12 02:23:16,169 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-12 02:23:16,171 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (1/1) ...
[2023-11-12 02:23:16,179 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:23:16,199 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:16,217 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-12 02:23:16,251 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-12 02:23:16,279 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-12 02:23:16,280 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-11-12 02:23:16,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-11-12 02:23:16,281 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-12 02:23:16,281 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-12 02:23:16,281 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-12 02:23:16,443 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-12 02:23:16,445 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-12 02:23:17,085 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-12 02:23:17,093 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-12 02:23:17,094 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-12 02:23:17,096 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:17 BoogieIcfgContainer
[2023-11-12 02:23:17,096 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-12 02:23:17,099 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-12 02:23:17,099 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-12 02:23:17,103 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-12 02:23:17,103 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:15" (1/3) ...
[2023-11-12 02:23:17,104 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e47fffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:17, skipping insertion in model container
[2023-11-12 02:23:17,104 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:16" (2/3) ...
[2023-11-12 02:23:17,105 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e47fffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:17, skipping insertion in model container
[2023-11-12 02:23:17,105 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:17" (3/3) ...
[2023-11-12 02:23:17,106 INFO  L112   eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-58.i
[2023-11-12 02:23:17,128 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-12 02:23:17,129 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-12 02:23:17,221 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-12 02:23:17,234 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d71c1cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-12 02:23:17,236 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-12 02:23:17,243 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 89 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 61 states have internal predecessors, (92), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:17,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 171
[2023-11-12 02:23:17,272 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:17,274 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:17,275 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:17,285 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:17,285 INFO  L85        PathProgramCache]: Analyzing trace with hash -806613187, now seen corresponding path program 1 times
[2023-11-12 02:23:17,298 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:17,298 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985028715]
[2023-11-12 02:23:17,299 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:17,299 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:17,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:17,646 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:23:17,647 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985028715]
[2023-11-12 02:23:17,648 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic
[2023-11-12 02:23:17,648 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507435827]
[2023-11-12 02:23:17,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:17,649 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:17,649 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:17,654 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:17,683 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-12 02:23:17,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:17,980 INFO  L262         TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 1 conjunts are in the unsatisfiable core
[2023-11-12 02:23:17,998 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:23:18,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked.
[2023-11-12 02:23:18,083 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:23:18,084 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507435827] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:23:18,084 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:23:18,085 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:23:18,087 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018539975]
[2023-11-12 02:23:18,088 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:23:18,095 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-12 02:23:18,095 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:23:18,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-12 02:23:18,156 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-12 02:23:18,160 INFO  L87              Difference]: Start difference. First operand  has 89 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 61 states have internal predecessors, (92), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand  has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26)
[2023-11-12 02:23:18,207 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:23:18,207 INFO  L93              Difference]: Finished difference Result 171 states and 308 transitions.
[2023-11-12 02:23:18,208 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-12 02:23:18,210 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 170
[2023-11-12 02:23:18,211 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:23:18,221 INFO  L225             Difference]: With dead ends: 171
[2023-11-12 02:23:18,221 INFO  L226             Difference]: Without dead ends: 85
[2023-11-12 02:23:18,227 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-12 02:23:18,231 INFO  L413           NwaCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:23:18,233 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:23:18,254 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-11-12 02:23:18,290 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85.
[2023-11-12 02:23:18,292 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 85 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:18,295 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 135 transitions.
[2023-11-12 02:23:18,297 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states and 135 transitions. Word has length 170
[2023-11-12 02:23:18,298 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:23:18,298 INFO  L495      AbstractCegarLoop]: Abstraction has 85 states and 135 transitions.
[2023-11-12 02:23:18,298 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26)
[2023-11-12 02:23:18,298 INFO  L276                IsEmpty]: Start isEmpty. Operand 85 states and 135 transitions.
[2023-11-12 02:23:18,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 171
[2023-11-12 02:23:18,306 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:18,308 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:18,314 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-12 02:23:18,511 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2023-11-12 02:23:18,512 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:18,512 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:18,513 INFO  L85        PathProgramCache]: Analyzing trace with hash 1543427521, now seen corresponding path program 1 times
[2023-11-12 02:23:18,513 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:18,514 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158075731]
[2023-11-12 02:23:18,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:18,514 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:18,683 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:23:18,684 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89076641]
[2023-11-12 02:23:18,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:18,684 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:18,684 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:18,704 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:18,735 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-12 02:23:18,918 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:18,921 INFO  L262         TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-12 02:23:18,943 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:23:19,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 676 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked.
[2023-11-12 02:23:19,247 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:23:19,248 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:23:19,251 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158075731]
[2023-11-12 02:23:19,252 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:23:19,252 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89076641]
[2023-11-12 02:23:19,252 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [89076641] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:23:19,253 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:23:19,253 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:23:19,253 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820360387]
[2023-11-12 02:23:19,254 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:23:19,257 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:23:19,258 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:23:19,260 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:23:19,261 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:23:19,262 INFO  L87              Difference]: Start difference. First operand 85 states and 135 transitions. Second operand  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26)
[2023-11-12 02:23:19,349 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:23:19,353 INFO  L93              Difference]: Finished difference Result 167 states and 267 transitions.
[2023-11-12 02:23:19,355 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:23:19,355 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 170
[2023-11-12 02:23:19,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:23:19,360 INFO  L225             Difference]: With dead ends: 167
[2023-11-12 02:23:19,364 INFO  L226             Difference]: Without dead ends: 85
[2023-11-12 02:23:19,365 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:23:19,370 INFO  L413           NwaCegarLoop]: 127 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:23:19,371 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 127 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:23:19,373 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-11-12 02:23:19,398 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85.
[2023-11-12 02:23:19,399 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 85 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:19,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 134 transitions.
[2023-11-12 02:23:19,405 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states and 134 transitions. Word has length 170
[2023-11-12 02:23:19,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:23:19,412 INFO  L495      AbstractCegarLoop]: Abstraction has 85 states and 134 transitions.
[2023-11-12 02:23:19,412 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26)
[2023-11-12 02:23:19,413 INFO  L276                IsEmpty]: Start isEmpty. Operand 85 states and 134 transitions.
[2023-11-12 02:23:19,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 171
[2023-11-12 02:23:19,424 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:19,425 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:19,432 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-12 02:23:19,632 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2023-11-12 02:23:19,632 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:19,633 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:19,633 INFO  L85        PathProgramCache]: Analyzing trace with hash 842362943, now seen corresponding path program 1 times
[2023-11-12 02:23:19,633 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:19,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725996832]
[2023-11-12 02:23:19,634 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:19,634 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:19,691 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:23:19,692 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121604834]
[2023-11-12 02:23:19,692 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:19,692 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:19,692 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:19,694 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:19,715 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-12 02:23:19,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:19,890 INFO  L262         TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-12 02:23:19,897 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:23:20,256 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 213 proven. 69 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked.
[2023-11-12 02:23:20,256 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:23:20,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked.
[2023-11-12 02:23:20,565 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:23:20,565 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725996832]
[2023-11-12 02:23:20,565 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:23:20,565 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121604834]
[2023-11-12 02:23:20,566 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121604834] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:23:20,566 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-12 02:23:20,566 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7
[2023-11-12 02:23:20,567 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665165230]
[2023-11-12 02:23:20,567 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:23:20,568 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-12 02:23:20,568 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:23:20,569 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-12 02:23:20,570 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-12 02:23:20,570 INFO  L87              Difference]: Start difference. First operand 85 states and 134 transitions. Second operand  has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50)
[2023-11-12 02:23:20,908 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:23:20,908 INFO  L93              Difference]: Finished difference Result 175 states and 272 transitions.
[2023-11-12 02:23:20,909 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-12 02:23:20,910 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 170
[2023-11-12 02:23:20,911 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:23:20,912 INFO  L225             Difference]: With dead ends: 175
[2023-11-12 02:23:20,912 INFO  L226             Difference]: Without dead ends: 93
[2023-11-12 02:23:20,913 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110
[2023-11-12 02:23:20,915 INFO  L413           NwaCegarLoop]: 84 mSDtfsCounter, 66 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-11-12 02:23:20,915 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 197 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-11-12 02:23:20,917 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2023-11-12 02:23:20,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89.
[2023-11-12 02:23:20,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 89 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:20,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions.
[2023-11-12 02:23:20,935 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 170
[2023-11-12 02:23:20,936 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:23:20,936 INFO  L495      AbstractCegarLoop]: Abstraction has 89 states and 135 transitions.
[2023-11-12 02:23:20,937 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50)
[2023-11-12 02:23:20,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions.
[2023-11-12 02:23:20,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2023-11-12 02:23:20,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:20,940 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:20,951 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-12 02:23:21,147 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:21,147 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:21,148 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:21,148 INFO  L85        PathProgramCache]: Analyzing trace with hash -1225922778, now seen corresponding path program 1 times
[2023-11-12 02:23:21,148 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:21,148 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673117102]
[2023-11-12 02:23:21,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:21,149 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:21,206 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:23:21,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185091396]
[2023-11-12 02:23:21,214 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:21,214 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:21,214 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:21,219 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:21,226 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-12 02:23:21,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:21,428 INFO  L262         TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-12 02:23:21,437 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:23:21,567 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 519 proven. 18 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked.
[2023-11-12 02:23:21,568 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:23:21,816 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 57 proven. 18 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked.
[2023-11-12 02:23:21,817 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:23:21,817 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673117102]
[2023-11-12 02:23:21,817 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:23:21,818 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185091396]
[2023-11-12 02:23:21,818 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185091396] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:23:21,818 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-12 02:23:21,818 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10
[2023-11-12 02:23:21,819 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228135540]
[2023-11-12 02:23:21,819 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:23:21,820 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2023-11-12 02:23:21,820 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:23:21,821 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2023-11-12 02:23:21,821 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-12 02:23:21,822 INFO  L87              Difference]: Start difference. First operand 89 states and 135 transitions. Second operand  has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33)
[2023-11-12 02:23:22,264 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:23:22,265 INFO  L93              Difference]: Finished difference Result 184 states and 276 transitions.
[2023-11-12 02:23:22,265 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-12 02:23:22,266 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 173
[2023-11-12 02:23:22,267 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:23:22,268 INFO  L225             Difference]: With dead ends: 184
[2023-11-12 02:23:22,269 INFO  L226             Difference]: Without dead ends: 98
[2023-11-12 02:23:22,269 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210
[2023-11-12 02:23:22,271 INFO  L413           NwaCegarLoop]: 88 mSDtfsCounter, 297 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-11-12 02:23:22,271 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 266 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-11-12 02:23:22,273 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2023-11-12 02:23:22,290 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93.
[2023-11-12 02:23:22,291 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 93 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:22,293 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions.
[2023-11-12 02:23:22,293 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 173
[2023-11-12 02:23:22,294 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:23:22,294 INFO  L495      AbstractCegarLoop]: Abstraction has 93 states and 137 transitions.
[2023-11-12 02:23:22,295 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33)
[2023-11-12 02:23:22,295 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions.
[2023-11-12 02:23:22,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 175
[2023-11-12 02:23:22,298 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:22,299 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:22,312 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-12 02:23:22,506 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:22,506 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:22,507 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:22,507 INFO  L85        PathProgramCache]: Analyzing trace with hash -659064429, now seen corresponding path program 1 times
[2023-11-12 02:23:22,507 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:22,507 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403036085]
[2023-11-12 02:23:22,507 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:22,508 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:22,579 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:23:22,597 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019839221]
[2023-11-12 02:23:22,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:22,598 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:22,598 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:22,599 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:22,623 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-12 02:23:22,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:22,776 INFO  L262         TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-12 02:23:22,794 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:23:22,844 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked.
[2023-11-12 02:23:22,844 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:23:22,845 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:23:22,846 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403036085]
[2023-11-12 02:23:22,850 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:23:22,851 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019839221]
[2023-11-12 02:23:22,851 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019839221] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:23:22,851 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:23:22,852 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-12 02:23:22,853 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498034255]
[2023-11-12 02:23:22,853 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:23:22,854 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-12 02:23:22,854 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:23:22,861 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-12 02:23:22,863 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-12 02:23:22,863 INFO  L87              Difference]: Start difference. First operand 93 states and 137 transitions. Second operand  has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26)
[2023-11-12 02:23:23,080 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:23:23,081 INFO  L93              Difference]: Finished difference Result 193 states and 280 transitions.
[2023-11-12 02:23:23,081 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-12 02:23:23,082 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 174
[2023-11-12 02:23:23,085 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:23:23,086 INFO  L225             Difference]: With dead ends: 193
[2023-11-12 02:23:23,086 INFO  L226             Difference]: Without dead ends: 103
[2023-11-12 02:23:23,087 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2023-11-12 02:23:23,089 INFO  L413           NwaCegarLoop]: 100 mSDtfsCounter, 105 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-12 02:23:23,091 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 248 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-12 02:23:23,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2023-11-12 02:23:23,125 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97.
[2023-11-12 02:23:23,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 97 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2023-11-12 02:23:23,128 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions.
[2023-11-12 02:23:23,128 INFO  L78                 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 174
[2023-11-12 02:23:23,129 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:23:23,129 INFO  L495      AbstractCegarLoop]: Abstraction has 97 states and 139 transitions.
[2023-11-12 02:23:23,130 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26)
[2023-11-12 02:23:23,130 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions.
[2023-11-12 02:23:23,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 175
[2023-11-12 02:23:23,133 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:23:23,133 INFO  L195           NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:23:23,145 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-12 02:23:23,345 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:23,345 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:23:23,346 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:23:23,346 INFO  L85        PathProgramCache]: Analyzing trace with hash -440209711, now seen corresponding path program 1 times
[2023-11-12 02:23:23,346 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:23:23,346 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042452446]
[2023-11-12 02:23:23,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:23,346 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:23:23,379 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:23:23,384 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285718450]
[2023-11-12 02:23:23,385 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:23:23,385 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:23:23,385 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:23:23,386 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:23:23,407 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a773ed2-027d-4d11-a0fc-359a78e94982/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-12 02:23:23,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:23:23,559 INFO  L262         TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 36 conjunts are in the unsatisfiable core
[2023-11-12 02:23:23,569 INFO  L285         TraceCheckSpWp]: Computing forward predicates...