./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/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 4218f83d8720e42f8aca95bc53f0e3596fa9d7dcb5b7fd0af0252eb620036e99
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 23:09:26,811 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 23:09:26,941 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 23:09:26,952 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 23:09:26,953 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 23:09:27,001 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 23:09:27,003 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 23:09:27,004 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 23:09:27,005 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 23:09:27,011 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 23:09:27,012 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 23:09:27,013 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 23:09:27,014 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 23:09:27,016 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 23:09:27,017 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 23:09:27,017 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 23:09:27,018 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 23:09:27,018 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 23:09:27,019 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 23:09:27,019 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 23:09:27,020 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 23:09:27,021 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 23:09:27,021 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 23:09:27,022 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 23:09:27,022 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 23:09:27,023 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:09:27,023 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 23:09:27,024 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 23:09:27,024 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 23:09:27,025 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 23:09:27,027 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 23:09:27,027 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 23:09:27,027 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 23:09:27,027 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 23:09:27,028 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 23:09:27,028 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 23:09:27,028 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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/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 -> 4218f83d8720e42f8aca95bc53f0e3596fa9d7dcb5b7fd0af0252eb620036e99
[2023-11-06 23:09:27,422 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 23:09:27,468 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 23:09:27,471 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 23:09:27,474 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 23:09:27,475 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 23:09:27,478 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-06 23:09:30,917 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 23:09:31,635 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 23:09:31,636 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-06 23:09:31,687 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/data/8d0554958/35e90ec4807d4f47a0b7bf4aed0ff5c3/FLAG0dc8146d9
[2023-11-06 23:09:31,702 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/data/8d0554958/35e90ec4807d4f47a0b7bf4aed0ff5c3
[2023-11-06 23:09:31,705 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 23:09:31,707 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 23:09:31,708 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 23:09:31,709 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 23:09:31,714 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 23:09:31,715 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:31" (1/1) ...
[2023-11-06 23:09:31,717 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5566ea4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:31, skipping insertion in model container
[2023-11-06 23:09:31,717 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:31" (1/1) ...
[2023-11-06 23:09:31,977 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 23:09:32,514 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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1176,1189]
[2023-11-06 23:09:34,297 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:09:34,313 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 23:09:34,325 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_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1176,1189]
[2023-11-06 23:09:35,468 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 23:09:35,488 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 23:09:35,489 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35 WrapperNode
[2023-11-06 23:09:35,489 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 23:09:35,491 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 23:09:35,491 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 23:09:35,491 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 23:09:35,500 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:35,991 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:39,191 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35529
[2023-11-06 23:09:39,192 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 23:09:39,192 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 23:09:39,193 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 23:09:39,193 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 23:09:39,205 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:39,207 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:40,288 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:40,289 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:41,527 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:41,785 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:42,064 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:42,209 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:42,960 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 23:09:42,961 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 23:09:42,961 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 23:09:42,961 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 23:09:42,962 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (1/1) ...
[2023-11-06 23:09:42,972 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 23:09:42,986 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:09:43,000 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 23:09:43,002 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 23:09:43,044 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 23:09:43,044 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 23:09:43,044 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 23:09:43,045 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 23:09:45,576 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 23:09:45,579 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 23:10:09,353 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 23:10:09,392 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 23:10:09,392 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 23:10:09,400 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:09 BoogieIcfgContainer
[2023-11-06 23:10:09,401 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 23:10:09,404 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 23:10:09,404 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 23:10:09,408 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 23:10:09,408 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:31" (1/3) ...
[2023-11-06 23:10:09,409 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4e32b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:09, skipping insertion in model container
[2023-11-06 23:10:09,409 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:35" (2/3) ...
[2023-11-06 23:10:09,410 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4e32b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:09, skipping insertion in model container
[2023-11-06 23:10:09,410 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:09" (3/3) ...
[2023-11-06 23:10:09,412 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-06 23:10:09,434 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 23:10:09,435 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 23:10:09,604 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 23:10:09,612 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;@55902731, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 23:10:09,613 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 23:10:09,640 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6173 states, 6171 states have (on average 1.6663425700858856) internal successors, (10283), 6172 states have internal predecessors, (10283), 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 23:10:09,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 432
[2023-11-06 23:10:09,673 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:09,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:09,675 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:09,680 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:09,681 INFO  L85        PathProgramCache]: Analyzing trace with hash -909152076, now seen corresponding path program 1 times
[2023-11-06 23:10:09,692 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:09,693 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975604736]
[2023-11-06 23:10:09,693 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:09,694 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:10,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:13,269 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 23:10:13,270 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:13,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975604736]
[2023-11-06 23:10:13,272 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975604736] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:13,272 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:13,273 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:13,275 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877619566]
[2023-11-06 23:10:13,277 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:13,287 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:13,288 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:13,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:13,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:13,500 INFO  L87              Difference]: Start difference. First operand  has 6173 states, 6171 states have (on average 1.6663425700858856) internal successors, (10283), 6172 states have internal predecessors, (10283), 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 107.75) internal successors, (431), 4 states have internal predecessors, (431), 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 23:10:14,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:14,018 INFO  L93              Difference]: Finished difference Result 12141 states and 20229 transitions.
[2023-11-06 23:10:14,019 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:14,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 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 431
[2023-11-06 23:10:14,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:14,091 INFO  L225             Difference]: With dead ends: 12141
[2023-11-06 23:10:14,092 INFO  L226             Difference]: Without dead ends: 6171
[2023-11-06 23:10:14,111 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 23:10:14,116 INFO  L413           NwaCegarLoop]: 10275 mSDtfsCounter, 1 mSDsluCounter, 20544 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30819 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:14,117 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30819 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:10:14,154 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6171 states.
[2023-11-06 23:10:14,363 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6171.
[2023-11-06 23:10:14,385 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6171 states, 6170 states have (on average 1.6659643435980551) internal successors, (10279), 6170 states have internal predecessors, (10279), 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 23:10:14,417 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 10279 transitions.
[2023-11-06 23:10:14,419 INFO  L78                 Accepts]: Start accepts. Automaton has 6171 states and 10279 transitions. Word has length 431
[2023-11-06 23:10:14,423 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:14,424 INFO  L495      AbstractCegarLoop]: Abstraction has 6171 states and 10279 transitions.
[2023-11-06 23:10:14,425 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 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 23:10:14,425 INFO  L276                IsEmpty]: Start isEmpty. Operand 6171 states and 10279 transitions.
[2023-11-06 23:10:14,440 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 433
[2023-11-06 23:10:14,440 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:14,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:14,442 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 23:10:14,443 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:14,444 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:14,444 INFO  L85        PathProgramCache]: Analyzing trace with hash 1882784220, now seen corresponding path program 1 times
[2023-11-06 23:10:14,445 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:14,445 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097444157]
[2023-11-06 23:10:14,446 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:14,446 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:14,905 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:16,211 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 23:10:16,212 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:16,213 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097444157]
[2023-11-06 23:10:16,213 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097444157] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:16,213 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:16,213 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 23:10:16,214 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097939308]
[2023-11-06 23:10:16,214 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:16,217 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 23:10:16,217 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:16,219 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 23:10:16,220 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 23:10:16,220 INFO  L87              Difference]: Start difference. First operand 6171 states and 10279 transitions. Second operand  has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 23:10:16,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:16,583 INFO  L93              Difference]: Finished difference Result 12142 states and 20225 transitions.
[2023-11-06 23:10:16,584 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 23:10:16,585 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 432
[2023-11-06 23:10:16,586 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:16,619 INFO  L225             Difference]: With dead ends: 12142
[2023-11-06 23:10:16,619 INFO  L226             Difference]: Without dead ends: 6174
[2023-11-06 23:10:16,632 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 23:10:16,635 INFO  L413           NwaCegarLoop]: 10275 mSDtfsCounter, 1 mSDsluCounter, 20541 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30816 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:16,636 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30816 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:10:16,651 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6174 states.
[2023-11-06 23:10:16,846 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 6173.
[2023-11-06 23:10:16,875 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6173 states, 6172 states have (on average 1.665748541801685) internal successors, (10281), 6172 states have internal predecessors, (10281), 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 23:10:16,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 10281 transitions.
[2023-11-06 23:10:16,900 INFO  L78                 Accepts]: Start accepts. Automaton has 6173 states and 10281 transitions. Word has length 432
[2023-11-06 23:10:16,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:16,902 INFO  L495      AbstractCegarLoop]: Abstraction has 6173 states and 10281 transitions.
[2023-11-06 23:10:16,903 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 23:10:16,903 INFO  L276                IsEmpty]: Start isEmpty. Operand 6173 states and 10281 transitions.
[2023-11-06 23:10:16,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 434
[2023-11-06 23:10:16,911 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:16,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:16,912 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 23:10:16,913 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:16,913 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:16,914 INFO  L85        PathProgramCache]: Analyzing trace with hash -1973661234, now seen corresponding path program 1 times
[2023-11-06 23:10:16,914 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:16,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670736441]
[2023-11-06 23:10:16,915 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:16,915 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:17,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:18,738 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 23:10:18,739 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:18,739 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670736441]
[2023-11-06 23:10:18,739 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670736441] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 23:10:18,740 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 23:10:18,741 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 23:10:18,741 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645262096]
[2023-11-06 23:10:18,741 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:18,743 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:10:18,744 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:18,745 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:10:18,745 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 23:10:18,746 INFO  L87              Difference]: Start difference. First operand 6173 states and 10281 transitions. Second operand  has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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 23:10:19,490 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:10:19,491 INFO  L93              Difference]: Finished difference Result 18538 states and 30879 transitions.
[2023-11-06 23:10:19,491 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:10:19,492 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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 433
[2023-11-06 23:10:19,493 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:10:19,583 INFO  L225             Difference]: With dead ends: 18538
[2023-11-06 23:10:19,584 INFO  L226             Difference]: Without dead ends: 12568
[2023-11-06 23:10:19,597 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 23:10:19,604 INFO  L413           NwaCegarLoop]: 10994 mSDtfsCounter, 40369 mSDsluCounter, 20543 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40369 SdHoareTripleChecker+Valid, 31537 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:10:19,606 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [40369 Valid, 31537 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 23:10:19,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12568 states.
[2023-11-06 23:10:19,815 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 6607.
[2023-11-06 23:10:19,827 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6607 states, 6606 states have (on average 1.6656070239176506) internal successors, (11003), 6606 states have internal predecessors, (11003), 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 23:10:19,863 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 11003 transitions.
[2023-11-06 23:10:19,863 INFO  L78                 Accepts]: Start accepts. Automaton has 6607 states and 11003 transitions. Word has length 433
[2023-11-06 23:10:19,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:10:19,865 INFO  L495      AbstractCegarLoop]: Abstraction has 6607 states and 11003 transitions.
[2023-11-06 23:10:19,866 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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 23:10:19,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 6607 states and 11003 transitions.
[2023-11-06 23:10:20,320 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4411
[2023-11-06 23:10:20,320 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:10:20,324 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:10:20,324 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 23:10:20,325 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:10:20,327 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:10:20,330 INFO  L85        PathProgramCache]: Analyzing trace with hash -1268508993, now seen corresponding path program 1 times
[2023-11-06 23:10:20,330 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:10:20,334 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674965733]
[2023-11-06 23:10:20,336 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:20,336 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:10:21,563 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:10:21,564 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560445944]
[2023-11-06 23:10:21,566 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:10:21,566 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:10:21,567 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:10:21,572 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:10:21,578 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 23:10:35,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:10:36,052 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36925 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 23:10:36,294 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:10:37,276 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 6 proven. 183 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2023-11-06 23:10:37,277 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:10:37,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked.
[2023-11-06 23:10:37,601 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:10:37,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674965733]
[2023-11-06 23:10:37,602 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:10:37,602 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560445944]
[2023-11-06 23:10:37,602 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560445944] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 23:10:37,602 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 23:10:37,605 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-06 23:10:37,606 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214554258]
[2023-11-06 23:10:37,606 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:10:37,613 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-06 23:10:37,614 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:10:37,621 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-06 23:10:37,622 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-06 23:10:37,624 INFO  L87              Difference]: Start difference. First operand 6607 states and 11003 transitions. Second operand  has 6 states, 6 states have (on average 687.1666666666666) internal successors, (4123), 6 states have internal predecessors, (4123), 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 23:11:01,102 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:01,103 INFO  L93              Difference]: Finished difference Result 29914 states and 49639 transitions.
[2023-11-06 23:11:01,103 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-06 23:11:01,104 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 687.1666666666666) internal successors, (4123), 6 states have internal predecessors, (4123), 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 4410
[2023-11-06 23:11:01,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:01,155 INFO  L225             Difference]: With dead ends: 29914
[2023-11-06 23:11:01,155 INFO  L226             Difference]: Without dead ends: 18540
[2023-11-06 23:11:01,175 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8820 GetRequests, 8808 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-06 23:11:01,176 INFO  L413           NwaCegarLoop]: 16439 mSDtfsCounter, 28115 mSDsluCounter, 56874 mSDsCounter, 0 mSdLazyCounter, 20700 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28115 SdHoareTripleChecker+Valid, 73313 SdHoareTripleChecker+Invalid, 21263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 20700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:01,177 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [28115 Valid, 73313 Invalid, 21263 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [563 Valid, 20700 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time]
[2023-11-06 23:11:01,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18540 states.
[2023-11-06 23:11:01,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18540 to 6607.
[2023-11-06 23:11:01,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6607 states, 6606 states have (on average 1.6656070239176506) internal successors, (11003), 6606 states have internal predecessors, (11003), 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 23:11:01,472 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 11003 transitions.
[2023-11-06 23:11:01,472 INFO  L78                 Accepts]: Start accepts. Automaton has 6607 states and 11003 transitions. Word has length 4410
[2023-11-06 23:11:01,482 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:01,482 INFO  L495      AbstractCegarLoop]: Abstraction has 6607 states and 11003 transitions.
[2023-11-06 23:11:01,484 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 687.1666666666666) internal successors, (4123), 6 states have internal predecessors, (4123), 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 23:11:01,484 INFO  L276                IsEmpty]: Start isEmpty. Operand 6607 states and 11003 transitions.
[2023-11-06 23:11:01,788 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4412
[2023-11-06 23:11:01,788 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:01,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:11:01,917 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-11-06 23:11:02,020 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:02,021 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:02,021 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:02,023 INFO  L85        PathProgramCache]: Analyzing trace with hash 930836209, now seen corresponding path program 1 times
[2023-11-06 23:11:02,023 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:02,023 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589543432]
[2023-11-06 23:11:02,024 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:02,024 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:03,355 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:03,355 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628326637]
[2023-11-06 23:11:03,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:03,357 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:03,357 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:03,361 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:03,391 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 23:11:16,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:16,966 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36928 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:11:17,142 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:17,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 8 proven. 183 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked.
[2023-11-06 23:11:17,977 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:11:18,232 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked.
[2023-11-06 23:11:18,233 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:18,233 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589543432]
[2023-11-06 23:11:18,233 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:18,233 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628326637]
[2023-11-06 23:11:18,234 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [628326637] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 23:11:18,234 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 23:11:18,236 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 23:11:18,237 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366861340]
[2023-11-06 23:11:18,237 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:18,242 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:11:18,242 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:18,248 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:11:18,248 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 23:11:18,250 INFO  L87              Difference]: Start difference. First operand 6607 states and 11003 transitions. Second operand  has 5 states, 5 states have (on average 825.2) internal successors, (4126), 5 states have internal predecessors, (4126), 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 23:11:27,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:27,409 INFO  L93              Difference]: Finished difference Result 23951 states and 39704 transitions.
[2023-11-06 23:11:27,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:11:27,410 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 825.2) internal successors, (4126), 5 states have internal predecessors, (4126), 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 4411
[2023-11-06 23:11:27,419 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:27,444 INFO  L225             Difference]: With dead ends: 23951
[2023-11-06 23:11:27,444 INFO  L226             Difference]: Without dead ends: 12572
[2023-11-06 23:11:27,456 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8821 GetRequests, 8812 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 23:11:27,457 INFO  L413           NwaCegarLoop]: 16429 mSDtfsCounter, 26421 mSDsluCounter, 16587 mSDsCounter, 0 mSdLazyCounter, 7494 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26421 SdHoareTripleChecker+Valid, 33016 SdHoareTripleChecker+Invalid, 8055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 7494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:27,457 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26421 Valid, 33016 Invalid, 8055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 7494 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time]
[2023-11-06 23:11:27,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12572 states.
[2023-11-06 23:11:27,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 6609.
[2023-11-06 23:11:27,602 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6609 states, 6608 states have (on average 1.665405569007264) internal successors, (11005), 6608 states have internal predecessors, (11005), 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 23:11:27,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 11005 transitions.
[2023-11-06 23:11:27,616 INFO  L78                 Accepts]: Start accepts. Automaton has 6609 states and 11005 transitions. Word has length 4411
[2023-11-06 23:11:27,620 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:27,621 INFO  L495      AbstractCegarLoop]: Abstraction has 6609 states and 11005 transitions.
[2023-11-06 23:11:27,622 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 825.2) internal successors, (4126), 5 states have internal predecessors, (4126), 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 23:11:27,622 INFO  L276                IsEmpty]: Start isEmpty. Operand 6609 states and 11005 transitions.
[2023-11-06 23:11:27,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4413
[2023-11-06 23:11:27,802 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:27,805 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:11:27,928 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-06 23:11:28,032 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:28,033 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:28,033 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:28,035 INFO  L85        PathProgramCache]: Analyzing trace with hash -283841893, now seen corresponding path program 1 times
[2023-11-06 23:11:28,035 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:28,035 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240440554]
[2023-11-06 23:11:28,037 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:28,037 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:28,803 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:28,803 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186643359]
[2023-11-06 23:11:28,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:28,805 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:28,805 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:28,809 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:28,818 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 23:11:41,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:11:41,740 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36932 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:11:41,840 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:11:42,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 10 proven. 183 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked.
[2023-11-06 23:11:42,539 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:11:42,870 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked.
[2023-11-06 23:11:42,870 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:11:42,870 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240440554]
[2023-11-06 23:11:42,870 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:11:42,870 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186643359]
[2023-11-06 23:11:42,871 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186643359] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 23:11:42,871 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 23:11:42,874 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 23:11:42,874 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577779423]
[2023-11-06 23:11:42,874 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:11:42,879 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:11:42,879 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:11:42,885 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:11:42,885 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 23:11:42,887 INFO  L87              Difference]: Start difference. First operand 6609 states and 11005 transitions. Second operand  has 5 states, 5 states have (on average 825.8) internal successors, (4129), 5 states have internal predecessors, (4129), 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 23:11:52,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:11:52,783 INFO  L93              Difference]: Finished difference Result 23959 states and 39712 transitions.
[2023-11-06 23:11:52,783 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:11:52,784 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 825.8) internal successors, (4129), 5 states have internal predecessors, (4129), 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 4412
[2023-11-06 23:11:52,791 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:11:52,814 INFO  L225             Difference]: With dead ends: 23959
[2023-11-06 23:11:52,815 INFO  L226             Difference]: Without dead ends: 12573
[2023-11-06 23:11:52,826 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8823 GetRequests, 8814 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 23:11:52,827 INFO  L413           NwaCegarLoop]: 16421 mSDtfsCounter, 26413 mSDsluCounter, 16582 mSDsCounter, 0 mSdLazyCounter, 7494 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26413 SdHoareTripleChecker+Valid, 33003 SdHoareTripleChecker+Invalid, 8055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 7494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time
[2023-11-06 23:11:52,828 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26413 Valid, 33003 Invalid, 8055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 7494 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time]
[2023-11-06 23:11:52,845 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12573 states.
[2023-11-06 23:11:52,960 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 6611.
[2023-11-06 23:11:52,970 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6611 states, 6610 states have (on average 1.6652042360060515) internal successors, (11007), 6610 states have internal predecessors, (11007), 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 23:11:52,986 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 11007 transitions.
[2023-11-06 23:11:52,986 INFO  L78                 Accepts]: Start accepts. Automaton has 6611 states and 11007 transitions. Word has length 4412
[2023-11-06 23:11:52,990 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:11:52,990 INFO  L495      AbstractCegarLoop]: Abstraction has 6611 states and 11007 transitions.
[2023-11-06 23:11:52,991 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 825.8) internal successors, (4129), 5 states have internal predecessors, (4129), 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 23:11:52,991 INFO  L276                IsEmpty]: Start isEmpty. Operand 6611 states and 11007 transitions.
[2023-11-06 23:11:53,198 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4414
[2023-11-06 23:11:53,199 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:11:53,202 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:11:53,356 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 23:11:53,415 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 23:11:53,415 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:11:53,416 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:11:53,418 INFO  L85        PathProgramCache]: Analyzing trace with hash 1465750041, now seen corresponding path program 1 times
[2023-11-06 23:11:53,418 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:11:53,418 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888391060]
[2023-11-06 23:11:53,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:53,418 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:11:54,300 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:11:54,301 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166351752]
[2023-11-06 23:11:54,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:11:54,302 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:11:54,303 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:11:54,304 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:11:54,324 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 23:12:06,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:07,247 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36935 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:12:07,451 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:08,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 12 proven. 183 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked.
[2023-11-06 23:12:08,062 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:12:08,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2023-11-06 23:12:08,237 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:08,237 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888391060]
[2023-11-06 23:12:08,237 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:08,238 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166351752]
[2023-11-06 23:12:08,238 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [166351752] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 23:12:08,238 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 23:12:08,240 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 23:12:08,241 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824456017]
[2023-11-06 23:12:08,241 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:08,245 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:12:08,246 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:08,251 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:12:08,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 23:12:08,253 INFO  L87              Difference]: Start difference. First operand 6611 states and 11007 transitions. Second operand  has 5 states, 5 states have (on average 826.4) internal successors, (4132), 5 states have internal predecessors, (4132), 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 23:12:17,116 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:17,116 INFO  L93              Difference]: Finished difference Result 23967 states and 39720 transitions.
[2023-11-06 23:12:17,118 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:12:17,119 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 826.4) internal successors, (4132), 5 states have internal predecessors, (4132), 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 4413
[2023-11-06 23:12:17,125 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:17,146 INFO  L225             Difference]: With dead ends: 23967
[2023-11-06 23:12:17,146 INFO  L226             Difference]: Without dead ends: 12574
[2023-11-06 23:12:17,156 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8825 GetRequests, 8816 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 23:12:17,157 INFO  L413           NwaCegarLoop]: 16413 mSDtfsCounter, 26405 mSDsluCounter, 16577 mSDsCounter, 0 mSdLazyCounter, 7494 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26405 SdHoareTripleChecker+Valid, 32990 SdHoareTripleChecker+Invalid, 8055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 7494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:17,158 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26405 Valid, 32990 Invalid, 8055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 7494 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time]
[2023-11-06 23:12:17,172 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12574 states.
[2023-11-06 23:12:17,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12574 to 6613.
[2023-11-06 23:12:17,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6613 states, 6612 states have (on average 1.6650030248033878) internal successors, (11009), 6612 states have internal predecessors, (11009), 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 23:12:17,305 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6613 states to 6613 states and 11009 transitions.
[2023-11-06 23:12:17,306 INFO  L78                 Accepts]: Start accepts. Automaton has 6613 states and 11009 transitions. Word has length 4413
[2023-11-06 23:12:17,309 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:17,310 INFO  L495      AbstractCegarLoop]: Abstraction has 6613 states and 11009 transitions.
[2023-11-06 23:12:17,311 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 826.4) internal successors, (4132), 5 states have internal predecessors, (4132), 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 23:12:17,311 INFO  L276                IsEmpty]: Start isEmpty. Operand 6613 states and 11009 transitions.
[2023-11-06 23:12:17,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4415
[2023-11-06 23:12:17,450 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:17,453 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:12:17,581 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:17,668 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:17,668 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:17,669 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:17,670 INFO  L85        PathProgramCache]: Analyzing trace with hash 647577461, now seen corresponding path program 1 times
[2023-11-06 23:12:17,670 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:17,670 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194414667]
[2023-11-06 23:12:17,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:17,671 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:18,332 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:18,332 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512417194]
[2023-11-06 23:12:18,334 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:18,334 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:18,334 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:18,337 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:18,341 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 23:12:30,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:31,110 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36938 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:12:31,405 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 23:12:31,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 14 proven. 183 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked.
[2023-11-06 23:12:31,943 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 23:12:32,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked.
[2023-11-06 23:12:32,102 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 23:12:32,102 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194414667]
[2023-11-06 23:12:32,103 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 23:12:32,103 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512417194]
[2023-11-06 23:12:32,103 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [512417194] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 23:12:32,103 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 23:12:32,106 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 23:12:32,106 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150262616]
[2023-11-06 23:12:32,106 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 23:12:32,111 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 23:12:32,111 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 23:12:32,117 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 23:12:32,117 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 23:12:32,119 INFO  L87              Difference]: Start difference. First operand 6613 states and 11009 transitions. Second operand  has 5 states, 5 states have (on average 827.0) internal successors, (4135), 5 states have internal predecessors, (4135), 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 23:12:40,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 23:12:40,667 INFO  L93              Difference]: Finished difference Result 23975 states and 39728 transitions.
[2023-11-06 23:12:40,667 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 23:12:40,668 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 827.0) internal successors, (4135), 5 states have internal predecessors, (4135), 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 4414
[2023-11-06 23:12:40,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 23:12:40,696 INFO  L225             Difference]: With dead ends: 23975
[2023-11-06 23:12:40,697 INFO  L226             Difference]: Without dead ends: 12575
[2023-11-06 23:12:40,706 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8827 GetRequests, 8818 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 23:12:40,707 INFO  L413           NwaCegarLoop]: 16405 mSDtfsCounter, 26397 mSDsluCounter, 16572 mSDsCounter, 0 mSdLazyCounter, 7494 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26397 SdHoareTripleChecker+Valid, 32977 SdHoareTripleChecker+Invalid, 8055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 7494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time
[2023-11-06 23:12:40,707 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26397 Valid, 32977 Invalid, 8055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 7494 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time]
[2023-11-06 23:12:40,722 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12575 states.
[2023-11-06 23:12:40,934 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 6615.
[2023-11-06 23:12:40,942 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6615 states, 6614 states have (on average 1.6648019352887813) internal successors, (11011), 6614 states have internal predecessors, (11011), 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 23:12:40,955 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 11011 transitions.
[2023-11-06 23:12:40,955 INFO  L78                 Accepts]: Start accepts. Automaton has 6615 states and 11011 transitions. Word has length 4414
[2023-11-06 23:12:40,958 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 23:12:40,959 INFO  L495      AbstractCegarLoop]: Abstraction has 6615 states and 11011 transitions.
[2023-11-06 23:12:40,960 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 827.0) internal successors, (4135), 5 states have internal predecessors, (4135), 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 23:12:40,960 INFO  L276                IsEmpty]: Start isEmpty. Operand 6615 states and 11011 transitions.
[2023-11-06 23:12:41,099 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4416
[2023-11-06 23:12:41,099 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 23:12:41,102 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-06 23:12:41,220 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 23:12:41,316 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:41,316 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 23:12:41,317 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 23:12:41,318 INFO  L85        PathProgramCache]: Analyzing trace with hash -201749953, now seen corresponding path program 1 times
[2023-11-06 23:12:41,318 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 23:12:41,318 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493822904]
[2023-11-06 23:12:41,319 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:41,319 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 23:12:41,975 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 23:12:41,975 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550359045]
[2023-11-06 23:12:41,976 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 23:12:41,977 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 23:12:41,977 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 23:12:41,983 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 23:12:42,010 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc386c3d-5aa2-48ff-a823-f21bd37fcdd0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 23:12:54,070 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 23:12:54,306 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36941 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 23:12:54,467 INFO  L285         TraceCheckSpWp]: Computing forward predicates...