./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/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 89fa5bcee0b87baa8fdcd504d33e57009a693bf03fe212b3e5e783c0c5f361d6
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 21:54:14,674 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 21:54:14,741 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 21:54:14,746 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 21:54:14,747 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 21:54:14,773 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 21:54:14,773 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 21:54:14,774 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 21:54:14,775 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 21:54:14,776 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 21:54:14,777 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 21:54:14,777 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 21:54:14,778 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 21:54:14,778 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 21:54:14,779 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 21:54:14,780 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 21:54:14,780 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 21:54:14,781 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 21:54:14,781 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 21:54:14,782 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 21:54:14,782 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 21:54:14,783 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 21:54:14,783 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 21:54:14,784 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 21:54:14,784 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 21:54:14,785 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 21:54:14,785 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 21:54:14,786 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 21:54:14,786 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 21:54:14,787 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 21:54:14,787 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 21:54:14,787 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 21:54:14,788 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 21:54:14,788 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 21:54:14,788 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 21:54:14,789 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 21:54:14,789 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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/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 -> 89fa5bcee0b87baa8fdcd504d33e57009a693bf03fe212b3e5e783c0c5f361d6
[2023-11-06 21:54:15,014 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 21:54:15,046 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 21:54:15,049 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 21:54:15,050 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 21:54:15,051 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 21:54:15,052 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-back-serstep.c
[2023-11-06 21:54:18,152 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 21:54:18,743 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 21:54:18,743 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-back-serstep.c
[2023-11-06 21:54:18,780 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/data/e9dd541a0/61019ddb80174c1292049c777855786d/FLAG56a3682fd
[2023-11-06 21:54:18,814 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/data/e9dd541a0/61019ddb80174c1292049c777855786d
[2023-11-06 21:54:18,822 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 21:54:18,826 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 21:54:18,830 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 21:54:18,830 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 21:54:18,836 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 21:54:18,837 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:18" (1/1) ...
[2023-11-06 21:54:18,838 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e1e730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:18, skipping insertion in model container
[2023-11-06 21:54:18,839 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:18" (1/1) ...
[2023-11-06 21:54:19,000 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 21:54:19,340 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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-back-serstep.c[1177,1190]
[2023-11-06 21:54:20,390 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 21:54:20,409 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 21:54:20,422 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_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-back-serstep.c[1177,1190]
[2023-11-06 21:54:21,151 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 21:54:21,171 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 21:54:21,171 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21 WrapperNode
[2023-11-06 21:54:21,172 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 21:54:21,173 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 21:54:21,173 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 21:54:21,173 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 21:54:21,182 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:21,377 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:24,038 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29812
[2023-11-06 21:54:24,038 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 21:54:24,039 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 21:54:24,039 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 21:54:24,039 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 21:54:24,049 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:24,049 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:24,860 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:24,860 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:25,754 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:25,917 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:26,379 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:26,479 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:26,927 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 21:54:26,928 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 21:54:26,928 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 21:54:26,928 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 21:54:26,929 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (1/1) ...
[2023-11-06 21:54:26,939 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 21:54:26,951 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:54:26,973 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 21:54:26,977 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 21:54:27,018 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 21:54:27,018 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 21:54:27,019 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 21:54:27,019 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 21:54:28,370 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 21:54:28,372 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 21:54:47,317 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 21:54:47,374 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 21:54:47,375 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 21:54:47,382 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:47 BoogieIcfgContainer
[2023-11-06 21:54:47,382 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 21:54:47,385 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 21:54:47,386 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 21:54:47,389 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 21:54:47,389 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:54:18" (1/3) ...
[2023-11-06 21:54:47,390 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6425e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:47, skipping insertion in model container
[2023-11-06 21:54:47,390 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:21" (2/3) ...
[2023-11-06 21:54:47,391 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6425e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:47, skipping insertion in model container
[2023-11-06 21:54:47,391 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:47" (3/3) ...
[2023-11-06 21:54:47,392 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.telephony.7.prop1-back-serstep.c
[2023-11-06 21:54:47,412 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 21:54:47,412 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 21:54:47,591 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 21:54:47,598 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;@6b09fade, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 21:54:47,598 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 21:54:47,624 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6821 states, 6819 states have (on average 1.6698929461797918) internal successors, (11387), 6820 states have internal predecessors, (11387), 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 21:54:47,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 732
[2023-11-06 21:54:47,680 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:54:47,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:47,683 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:54:47,688 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:54:47,689 INFO  L85        PathProgramCache]: Analyzing trace with hash 209296984, now seen corresponding path program 1 times
[2023-11-06 21:54:47,698 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:54:47,699 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278722212]
[2023-11-06 21:54:47,699 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:54:47,700 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:54:48,782 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:54:52,375 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 21:54:52,376 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:54:52,376 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278722212]
[2023-11-06 21:54:52,377 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278722212] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:54:52,378 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:54:52,378 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 21:54:52,380 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524608485]
[2023-11-06 21:54:52,380 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:54:52,391 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 21:54:52,391 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:54:52,438 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 21:54:52,439 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 21:54:52,460 INFO  L87              Difference]: Start difference. First operand  has 6821 states, 6819 states have (on average 1.6698929461797918) internal successors, (11387), 6820 states have internal predecessors, (11387), 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 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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 21:54:52,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:54:52,937 INFO  L93              Difference]: Finished difference Result 13404 states and 22382 transitions.
[2023-11-06 21:54:52,938 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 21:54:52,940 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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 731
[2023-11-06 21:54:52,947 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:54:53,010 INFO  L225             Difference]: With dead ends: 13404
[2023-11-06 21:54:53,011 INFO  L226             Difference]: Without dead ends: 6819
[2023-11-06 21:54:53,030 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 21:54:53,035 INFO  L413           NwaCegarLoop]: 11379 mSDtfsCounter, 1 mSDsluCounter, 22752 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34131 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 21:54:53,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34131 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 21:54:53,069 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6819 states.
[2023-11-06 21:54:53,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6819 to 6819.
[2023-11-06 21:54:53,268 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6819 states, 6818 states have (on average 1.669551188031681) internal successors, (11383), 6818 states have internal predecessors, (11383), 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 21:54:53,295 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11383 transitions.
[2023-11-06 21:54:53,297 INFO  L78                 Accepts]: Start accepts. Automaton has 6819 states and 11383 transitions. Word has length 731
[2023-11-06 21:54:53,300 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:54:53,301 INFO  L495      AbstractCegarLoop]: Abstraction has 6819 states and 11383 transitions.
[2023-11-06 21:54:53,302 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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 21:54:53,302 INFO  L276                IsEmpty]: Start isEmpty. Operand 6819 states and 11383 transitions.
[2023-11-06 21:54:53,321 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 733
[2023-11-06 21:54:53,322 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:54:53,322 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:53,323 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 21:54:53,323 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:54:53,324 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:54:53,325 INFO  L85        PathProgramCache]: Analyzing trace with hash -2099998784, now seen corresponding path program 1 times
[2023-11-06 21:54:53,325 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:54:53,325 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504717430]
[2023-11-06 21:54:53,326 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:54:53,326 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:54:53,900 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:54:55,554 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 21:54:55,554 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:54:55,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504717430]
[2023-11-06 21:54:55,555 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504717430] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:54:55,556 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:54:55,556 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 21:54:55,556 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812255482]
[2023-11-06 21:54:55,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:54:55,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 21:54:55,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:54:55,561 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 21:54:55,562 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 21:54:55,563 INFO  L87              Difference]: Start difference. First operand 6819 states and 11383 transitions. Second operand  has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 21:54:55,911 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:54:55,911 INFO  L93              Difference]: Finished difference Result 13405 states and 22378 transitions.
[2023-11-06 21:54:55,912 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 21:54:55,912 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 732
[2023-11-06 21:54:55,915 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:54:55,953 INFO  L225             Difference]: With dead ends: 13405
[2023-11-06 21:54:55,954 INFO  L226             Difference]: Without dead ends: 6822
[2023-11-06 21:54:55,966 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 21:54:55,969 INFO  L413           NwaCegarLoop]: 11379 mSDtfsCounter, 1 mSDsluCounter, 22749 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 21:54:55,970 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34128 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 21:54:55,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6822 states.
[2023-11-06 21:54:56,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6822 to 6821.
[2023-11-06 21:54:56,145 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6821 states, 6820 states have (on average 1.6693548387096775) internal successors, (11385), 6820 states have internal predecessors, (11385), 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 21:54:56,171 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6821 states to 6821 states and 11385 transitions.
[2023-11-06 21:54:56,172 INFO  L78                 Accepts]: Start accepts. Automaton has 6821 states and 11385 transitions. Word has length 732
[2023-11-06 21:54:56,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:54:56,173 INFO  L495      AbstractCegarLoop]: Abstraction has 6821 states and 11385 transitions.
[2023-11-06 21:54:56,174 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 21:54:56,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 6821 states and 11385 transitions.
[2023-11-06 21:54:56,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 734
[2023-11-06 21:54:56,194 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:54:56,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:56,195 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 21:54:56,195 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:54:56,196 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:54:56,197 INFO  L85        PathProgramCache]: Analyzing trace with hash 889126388, now seen corresponding path program 1 times
[2023-11-06 21:54:56,197 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:54:56,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366201842]
[2023-11-06 21:54:56,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:54:56,198 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:54:56,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:54:58,506 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 21:54:58,507 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:54:58,507 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366201842]
[2023-11-06 21:54:58,507 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366201842] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:54:58,508 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:54:58,508 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 21:54:58,509 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282992171]
[2023-11-06 21:54:58,509 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:54:58,510 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 21:54:58,510 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:54:58,512 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 21:54:58,512 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 21:54:58,513 INFO  L87              Difference]: Start difference. First operand 6821 states and 11385 transitions. Second operand  has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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 21:54:59,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:54:59,239 INFO  L93              Difference]: Finished difference Result 20833 states and 34776 transitions.
[2023-11-06 21:54:59,240 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 21:54:59,240 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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 733
[2023-11-06 21:54:59,242 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:54:59,324 INFO  L225             Difference]: With dead ends: 20833
[2023-11-06 21:54:59,325 INFO  L226             Difference]: Without dead ends: 14248
[2023-11-06 21:54:59,338 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 21:54:59,344 INFO  L413           NwaCegarLoop]: 12793 mSDtfsCounter, 45015 mSDsluCounter, 22751 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45015 SdHoareTripleChecker+Valid, 35544 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 21:54:59,345 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45015 Valid, 35544 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:54:59,369 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14248 states.
[2023-11-06 21:54:59,558 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14248 to 7672.
[2023-11-06 21:54:59,573 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7672 states, 7671 states have (on average 1.6688828053708773) internal successors, (12802), 7671 states have internal predecessors, (12802), 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 21:54:59,597 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 12802 transitions.
[2023-11-06 21:54:59,597 INFO  L78                 Accepts]: Start accepts. Automaton has 7672 states and 12802 transitions. Word has length 733
[2023-11-06 21:54:59,599 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:54:59,600 INFO  L495      AbstractCegarLoop]: Abstraction has 7672 states and 12802 transitions.
[2023-11-06 21:54:59,601 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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 21:54:59,604 INFO  L276                IsEmpty]: Start isEmpty. Operand 7672 states and 12802 transitions.
[2023-11-06 21:55:00,056 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5001
[2023-11-06 21:55:00,057 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:00,061 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:55:00,061 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 21:55:00,062 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:00,064 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:00,067 INFO  L85        PathProgramCache]: Analyzing trace with hash -755288976, now seen corresponding path program 1 times
[2023-11-06 21:55:00,068 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:00,074 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467777974]
[2023-11-06 21:55:00,076 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:00,076 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:00,792 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:00,792 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167404703]
[2023-11-06 21:55:00,794 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:00,794 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:00,794 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:00,801 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:00,814 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 21:55:08,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:08,157 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22350 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 21:55:08,300 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:08,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 21:55:08,555 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:08,555 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:08,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467777974]
[2023-11-06 21:55:08,555 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:08,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167404703]
[2023-11-06 21:55:08,556 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [167404703] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:08,556 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:08,557 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 21:55:08,558 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298637582]
[2023-11-06 21:55:08,558 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:08,565 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 21:55:08,565 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:08,572 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 21:55:08,572 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 21:55:08,575 INFO  L87              Difference]: Start difference. First operand 7672 states and 12802 transitions. Second operand  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:08,931 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:08,931 INFO  L93              Difference]: Finished difference Result 14267 states and 23811 transitions.
[2023-11-06 21:55:08,932 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 21:55:08,935 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 5000
[2023-11-06 21:55:08,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:08,952 INFO  L225             Difference]: With dead ends: 14267
[2023-11-06 21:55:08,953 INFO  L226             Difference]: Without dead ends: 7682
[2023-11-06 21:55:08,962 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4999 GetRequests, 4997 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 21:55:08,963 INFO  L413           NwaCegarLoop]: 11379 mSDtfsCounter, 12 mSDsluCounter, 22746 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34125 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:08,964 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34125 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:55:08,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7682 states.
[2023-11-06 21:55:09,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 7674.
[2023-11-06 21:55:09,129 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7674 states, 7673 states have (on average 1.6687084582301577) internal successors, (12804), 7673 states have internal predecessors, (12804), 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 21:55:09,148 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 12804 transitions.
[2023-11-06 21:55:09,148 INFO  L78                 Accepts]: Start accepts. Automaton has 7674 states and 12804 transitions. Word has length 5000
[2023-11-06 21:55:09,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:09,153 INFO  L495      AbstractCegarLoop]: Abstraction has 7674 states and 12804 transitions.
[2023-11-06 21:55:09,156 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:09,157 INFO  L276                IsEmpty]: Start isEmpty. Operand 7674 states and 12804 transitions.
[2023-11-06 21:55:09,436 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5001
[2023-11-06 21:55:09,437 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:09,441 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:09,523 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:09,661 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:09,662 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:09,662 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:09,664 INFO  L85        PathProgramCache]: Analyzing trace with hash 1054775998, now seen corresponding path program 1 times
[2023-11-06 21:55:09,664 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:09,664 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822536155]
[2023-11-06 21:55:09,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:09,665 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:10,401 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:10,402 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779449582]
[2023-11-06 21:55:10,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:10,404 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:10,404 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:10,405 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:10,433 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 21:55:17,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:17,575 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22351 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 21:55:17,691 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:17,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 21:55:17,876 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:17,877 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:17,877 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822536155]
[2023-11-06 21:55:17,877 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:17,877 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779449582]
[2023-11-06 21:55:17,877 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779449582] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:17,877 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:17,879 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 21:55:17,879 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641875416]
[2023-11-06 21:55:17,879 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:17,886 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 21:55:17,886 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:17,892 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 21:55:17,892 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 21:55:17,896 INFO  L87              Difference]: Start difference. First operand 7674 states and 12804 transitions. Second operand  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:18,268 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:18,268 INFO  L93              Difference]: Finished difference Result 14270 states and 23813 transitions.
[2023-11-06 21:55:18,269 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 21:55:18,271 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 5000
[2023-11-06 21:55:18,276 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:18,290 INFO  L225             Difference]: With dead ends: 14270
[2023-11-06 21:55:18,290 INFO  L226             Difference]: Without dead ends: 7683
[2023-11-06 21:55:18,298 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4999 GetRequests, 4997 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 21:55:18,299 INFO  L413           NwaCegarLoop]: 11379 mSDtfsCounter, 12 mSDsluCounter, 22746 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34125 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:18,299 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34125 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 21:55:18,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7683 states.
[2023-11-06 21:55:18,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 7675.
[2023-11-06 21:55:18,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7675 states, 7674 states have (on average 1.6686213187385979) internal successors, (12805), 7674 states have internal predecessors, (12805), 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 21:55:18,441 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7675 states to 7675 states and 12805 transitions.
[2023-11-06 21:55:18,441 INFO  L78                 Accepts]: Start accepts. Automaton has 7675 states and 12805 transitions. Word has length 5000
[2023-11-06 21:55:18,446 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:18,446 INFO  L495      AbstractCegarLoop]: Abstraction has 7675 states and 12805 transitions.
[2023-11-06 21:55:18,447 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:18,447 INFO  L276                IsEmpty]: Start isEmpty. Operand 7675 states and 12805 transitions.
[2023-11-06 21:55:18,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5001
[2023-11-06 21:55:18,608 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:18,612 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:55:18,674 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:18,825 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:18,825 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:18,826 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:18,828 INFO  L85        PathProgramCache]: Analyzing trace with hash -72406772, now seen corresponding path program 1 times
[2023-11-06 21:55:18,828 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:18,828 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574501143]
[2023-11-06 21:55:18,829 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:18,829 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:19,601 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:19,605 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912687768]
[2023-11-06 21:55:19,607 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:19,607 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:19,607 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:19,610 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:19,637 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 21:55:26,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:26,638 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22352 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 21:55:26,724 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:26,918 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 21:55:26,918 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:26,918 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:26,918 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574501143]
[2023-11-06 21:55:26,918 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:26,919 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912687768]
[2023-11-06 21:55:26,919 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [912687768] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:26,919 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:26,920 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 21:55:26,920 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903471284]
[2023-11-06 21:55:26,920 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:26,941 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 21:55:26,941 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:26,952 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 21:55:26,952 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 21:55:26,954 INFO  L87              Difference]: Start difference. First operand 7675 states and 12805 transitions. Second operand  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:27,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:27,252 INFO  L93              Difference]: Finished difference Result 14272 states and 23815 transitions.
[2023-11-06 21:55:27,252 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 21:55:27,254 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 5000
[2023-11-06 21:55:27,261 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:27,277 INFO  L225             Difference]: With dead ends: 14272
[2023-11-06 21:55:27,277 INFO  L226             Difference]: Without dead ends: 7684
[2023-11-06 21:55:27,285 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4999 GetRequests, 4997 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 21:55:27,295 INFO  L413           NwaCegarLoop]: 11379 mSDtfsCounter, 12 mSDsluCounter, 22746 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34125 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:27,298 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34125 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 21:55:27,316 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7684 states.
[2023-11-06 21:55:27,421 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7676.
[2023-11-06 21:55:27,432 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7676 states, 7675 states have (on average 1.6685342019543974) internal successors, (12806), 7675 states have internal predecessors, (12806), 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 21:55:27,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 12806 transitions.
[2023-11-06 21:55:27,451 INFO  L78                 Accepts]: Start accepts. Automaton has 7676 states and 12806 transitions. Word has length 5000
[2023-11-06 21:55:27,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:27,456 INFO  L495      AbstractCegarLoop]: Abstraction has 7676 states and 12806 transitions.
[2023-11-06 21:55:27,458 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1250.0) internal successors, (5000), 4 states have internal predecessors, (5000), 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 21:55:27,458 INFO  L276                IsEmpty]: Start isEmpty. Operand 7676 states and 12806 transitions.
[2023-11-06 21:55:27,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5001
[2023-11-06 21:55:27,733 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:27,737 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:27,800 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:27,953 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 21:55:27,953 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:27,954 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:27,955 INFO  L85        PathProgramCache]: Analyzing trace with hash -880565670, now seen corresponding path program 1 times
[2023-11-06 21:55:27,955 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:27,956 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881976343]
[2023-11-06 21:55:27,956 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:27,957 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:28,559 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:28,560 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465877309]
[2023-11-06 21:55:28,561 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:28,561 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:28,561 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:28,563 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:28,568 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 21:55:35,469 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:35,613 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22353 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:55:35,723 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:36,148 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked.
[2023-11-06 21:55:36,149 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:36,149 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:36,149 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881976343]
[2023-11-06 21:55:36,149 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:36,149 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465877309]
[2023-11-06 21:55:36,150 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [465877309] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:36,150 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:36,151 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:55:36,151 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085458484]
[2023-11-06 21:55:36,151 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:36,157 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:55:36,157 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:36,163 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:55:36,163 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:55:36,165 INFO  L87              Difference]: Start difference. First operand 7676 states and 12806 transitions. Second operand  has 7 states, 7 states have (on average 633.5714285714286) internal successors, (4435), 7 states have internal predecessors, (4435), 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 21:55:37,038 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:37,039 INFO  L93              Difference]: Finished difference Result 20851 states and 34794 transitions.
[2023-11-06 21:55:37,039 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:55:37,040 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 633.5714285714286) internal successors, (4435), 7 states have internal predecessors, (4435), 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 5000
[2023-11-06 21:55:37,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:37,077 INFO  L225             Difference]: With dead ends: 20851
[2023-11-06 21:55:37,078 INFO  L226             Difference]: Without dead ends: 14262
[2023-11-06 21:55:37,086 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5009 GetRequests, 4997 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:55:37,088 INFO  L413           NwaCegarLoop]: 12791 mSDtfsCounter, 31775 mSDsluCounter, 49731 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31775 SdHoareTripleChecker+Valid, 62522 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:37,088 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31775 Valid, 62522 Invalid, 46 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:55:37,105 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14262 states.
[2023-11-06 21:55:37,222 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14262 to 7676.
[2023-11-06 21:55:37,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7676 states, 7675 states have (on average 1.6685342019543974) internal successors, (12806), 7675 states have internal predecessors, (12806), 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 21:55:37,251 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 12806 transitions.
[2023-11-06 21:55:37,251 INFO  L78                 Accepts]: Start accepts. Automaton has 7676 states and 12806 transitions. Word has length 5000
[2023-11-06 21:55:37,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:37,260 INFO  L495      AbstractCegarLoop]: Abstraction has 7676 states and 12806 transitions.
[2023-11-06 21:55:37,262 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 633.5714285714286) internal successors, (4435), 7 states have internal predecessors, (4435), 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 21:55:37,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 7676 states and 12806 transitions.
[2023-11-06 21:55:37,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5002
[2023-11-06 21:55:37,528 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:37,534 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:55:37,609 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:37,753 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:37,753 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:37,754 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:37,755 INFO  L85        PathProgramCache]: Analyzing trace with hash -1638434174, now seen corresponding path program 1 times
[2023-11-06 21:55:37,755 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:37,755 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471488887]
[2023-11-06 21:55:37,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:37,756 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:38,367 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:38,369 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519495053]
[2023-11-06 21:55:38,371 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:38,371 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:38,371 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:38,372 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:38,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 21:55:45,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:45,218 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22356 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:55:45,315 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:45,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked.
[2023-11-06 21:55:45,722 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:45,722 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:45,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471488887]
[2023-11-06 21:55:45,723 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:45,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519495053]
[2023-11-06 21:55:45,723 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519495053] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:45,723 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:45,724 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:55:45,725 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856497637]
[2023-11-06 21:55:45,725 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:45,730 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:55:45,730 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:45,736 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:55:45,736 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:55:45,738 INFO  L87              Difference]: Start difference. First operand 7676 states and 12806 transitions. Second operand  has 7 states, 7 states have (on average 634.0) internal successors, (4438), 7 states have internal predecessors, (4438), 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 21:55:46,513 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:46,513 INFO  L93              Difference]: Finished difference Result 20853 states and 34796 transitions.
[2023-11-06 21:55:46,514 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:55:46,515 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 634.0) internal successors, (4438), 7 states have internal predecessors, (4438), 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 5001
[2023-11-06 21:55:46,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:46,553 INFO  L225             Difference]: With dead ends: 20853
[2023-11-06 21:55:46,553 INFO  L226             Difference]: Without dead ends: 14261
[2023-11-06 21:55:46,562 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5010 GetRequests, 4998 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:55:46,564 INFO  L413           NwaCegarLoop]: 12786 mSDtfsCounter, 31774 mSDsluCounter, 49715 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31774 SdHoareTripleChecker+Valid, 62501 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:46,564 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31774 Valid, 62501 Invalid, 47 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:55:46,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14261 states.
[2023-11-06 21:55:46,703 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14261 to 7678.
[2023-11-06 21:55:46,713 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7678 states, 7677 states have (on average 1.6683600364725804) internal successors, (12808), 7677 states have internal predecessors, (12808), 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 21:55:46,730 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 12808 transitions.
[2023-11-06 21:55:46,730 INFO  L78                 Accepts]: Start accepts. Automaton has 7678 states and 12808 transitions. Word has length 5001
[2023-11-06 21:55:46,738 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:46,739 INFO  L495      AbstractCegarLoop]: Abstraction has 7678 states and 12808 transitions.
[2023-11-06 21:55:46,740 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 634.0) internal successors, (4438), 7 states have internal predecessors, (4438), 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 21:55:46,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 7678 states and 12808 transitions.
[2023-11-06 21:55:46,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5003
[2023-11-06 21:55:46,956 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:46,960 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:55:47,037 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:47,185 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:47,185 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:47,186 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:47,188 INFO  L85        PathProgramCache]: Analyzing trace with hash 549349364, now seen corresponding path program 1 times
[2023-11-06 21:55:47,188 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:47,188 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212686370]
[2023-11-06 21:55:47,189 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:47,189 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:47,723 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:47,723 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725606704]
[2023-11-06 21:55:47,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:47,725 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:47,725 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:47,726 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:47,729 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 21:55:54,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:55:54,783 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22359 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:55:55,035 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:55:55,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked.
[2023-11-06 21:55:55,388 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:55:55,389 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:55:55,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212686370]
[2023-11-06 21:55:55,389 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:55:55,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725606704]
[2023-11-06 21:55:55,389 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [725606704] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:55:55,389 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:55:55,391 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:55:55,391 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708118401]
[2023-11-06 21:55:55,391 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:55:55,396 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:55:55,396 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:55:55,402 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:55:55,402 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:55:55,404 INFO  L87              Difference]: Start difference. First operand 7678 states and 12808 transitions. Second operand  has 7 states, 7 states have (on average 634.4285714285714) internal successors, (4441), 7 states have internal predecessors, (4441), 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 21:55:55,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:55:55,960 INFO  L93              Difference]: Finished difference Result 20859 states and 34802 transitions.
[2023-11-06 21:55:55,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:55:55,961 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 634.4285714285714) internal successors, (4441), 7 states have internal predecessors, (4441), 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 5002
[2023-11-06 21:55:55,968 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:55:55,996 INFO  L225             Difference]: With dead ends: 20859
[2023-11-06 21:55:55,997 INFO  L226             Difference]: Without dead ends: 14262
[2023-11-06 21:55:56,007 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5011 GetRequests, 4999 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:55:56,008 INFO  L413           NwaCegarLoop]: 12781 mSDtfsCounter, 31773 mSDsluCounter, 49700 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31773 SdHoareTripleChecker+Valid, 62481 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:55:56,008 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31773 Valid, 62481 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:55:56,024 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14262 states.
[2023-11-06 21:55:56,282 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14262 to 7680.
[2023-11-06 21:55:56,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7680 states, 7679 states have (on average 1.6681859617137649) internal successors, (12810), 7679 states have internal predecessors, (12810), 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 21:55:56,306 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 12810 transitions.
[2023-11-06 21:55:56,307 INFO  L78                 Accepts]: Start accepts. Automaton has 7680 states and 12810 transitions. Word has length 5002
[2023-11-06 21:55:56,311 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:55:56,311 INFO  L495      AbstractCegarLoop]: Abstraction has 7680 states and 12810 transitions.
[2023-11-06 21:55:56,313 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 634.4285714285714) internal successors, (4441), 7 states have internal predecessors, (4441), 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 21:55:56,313 INFO  L276                IsEmpty]: Start isEmpty. Operand 7680 states and 12810 transitions.
[2023-11-06 21:55:56,484 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5004
[2023-11-06 21:55:56,484 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:55:56,488 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:56,568 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 21:55:56,701 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:56,702 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:55:56,702 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:55:56,705 INFO  L85        PathProgramCache]: Analyzing trace with hash -610047512, now seen corresponding path program 1 times
[2023-11-06 21:55:56,705 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:55:56,705 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975568638]
[2023-11-06 21:55:56,706 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:56,706 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:55:57,266 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:55:57,266 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802039836]
[2023-11-06 21:55:57,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:55:57,268 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:55:57,268 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:55:57,269 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:55:57,297 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 21:56:03,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:04,023 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22362 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:04,097 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:04,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked.
[2023-11-06 21:56:04,669 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:04,669 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:04,669 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975568638]
[2023-11-06 21:56:04,669 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:04,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802039836]
[2023-11-06 21:56:04,670 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [802039836] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:04,670 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:04,671 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:04,674 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471058904]
[2023-11-06 21:56:04,674 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:04,679 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:04,679 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:04,685 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:04,685 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:04,687 INFO  L87              Difference]: Start difference. First operand 7680 states and 12810 transitions. Second operand  has 7 states, 7 states have (on average 634.8571428571429) internal successors, (4444), 7 states have internal predecessors, (4444), 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 21:56:05,166 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:05,166 INFO  L93              Difference]: Finished difference Result 20865 states and 34808 transitions.
[2023-11-06 21:56:05,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:05,168 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 634.8571428571429) internal successors, (4444), 7 states have internal predecessors, (4444), 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 5003
[2023-11-06 21:56:05,174 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:05,202 INFO  L225             Difference]: With dead ends: 20865
[2023-11-06 21:56:05,202 INFO  L226             Difference]: Without dead ends: 14263
[2023-11-06 21:56:05,212 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5012 GetRequests, 5000 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:05,213 INFO  L413           NwaCegarLoop]: 12776 mSDtfsCounter, 31772 mSDsluCounter, 49685 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31772 SdHoareTripleChecker+Valid, 62461 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:05,213 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31772 Valid, 62461 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:05,229 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14263 states.
[2023-11-06 21:56:05,346 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14263 to 7682.
[2023-11-06 21:56:05,355 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7682 states, 7681 states have (on average 1.6680119776070823) internal successors, (12812), 7681 states have internal predecessors, (12812), 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 21:56:05,370 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 12812 transitions.
[2023-11-06 21:56:05,371 INFO  L78                 Accepts]: Start accepts. Automaton has 7682 states and 12812 transitions. Word has length 5003
[2023-11-06 21:56:05,374 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:05,375 INFO  L495      AbstractCegarLoop]: Abstraction has 7682 states and 12812 transitions.
[2023-11-06 21:56:05,376 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 634.8571428571429) internal successors, (4444), 7 states have internal predecessors, (4444), 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 21:56:05,376 INFO  L276                IsEmpty]: Start isEmpty. Operand 7682 states and 12812 transitions.
[2023-11-06 21:56:05,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5005
[2023-11-06 21:56:05,600 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:05,603 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:05,691 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:05,817 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:05,817 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:05,818 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:05,820 INFO  L85        PathProgramCache]: Analyzing trace with hash 1193463568, now seen corresponding path program 1 times
[2023-11-06 21:56:05,820 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:05,820 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426685205]
[2023-11-06 21:56:05,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:05,821 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:06,305 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:06,305 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115229059]
[2023-11-06 21:56:06,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:06,307 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:06,307 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:06,309 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:06,311 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 21:56:13,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:13,150 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22366 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:13,235 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:13,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked.
[2023-11-06 21:56:13,527 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:13,527 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:13,527 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426685205]
[2023-11-06 21:56:13,527 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:13,527 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115229059]
[2023-11-06 21:56:13,528 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115229059] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:13,528 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:13,529 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:13,529 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601952517]
[2023-11-06 21:56:13,529 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:13,535 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:13,535 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:13,540 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:13,540 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:13,542 INFO  L87              Difference]: Start difference. First operand 7682 states and 12812 transitions. Second operand  has 7 states, 7 states have (on average 635.2857142857143) internal successors, (4447), 7 states have internal predecessors, (4447), 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 21:56:14,085 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:14,085 INFO  L93              Difference]: Finished difference Result 20871 states and 34814 transitions.
[2023-11-06 21:56:14,085 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:14,086 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 635.2857142857143) internal successors, (4447), 7 states have internal predecessors, (4447), 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 5004
[2023-11-06 21:56:14,090 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:14,122 INFO  L225             Difference]: With dead ends: 20871
[2023-11-06 21:56:14,123 INFO  L226             Difference]: Without dead ends: 14264
[2023-11-06 21:56:14,128 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5013 GetRequests, 5001 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:14,129 INFO  L413           NwaCegarLoop]: 12771 mSDtfsCounter, 31771 mSDsluCounter, 49670 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31771 SdHoareTripleChecker+Valid, 62441 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:14,129 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31771 Valid, 62441 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:14,144 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14264 states.
[2023-11-06 21:56:14,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14264 to 7684.
[2023-11-06 21:56:14,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7684 states, 7683 states have (on average 1.6678380840817388) internal successors, (12814), 7683 states have internal predecessors, (12814), 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 21:56:14,278 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 12814 transitions.
[2023-11-06 21:56:14,278 INFO  L78                 Accepts]: Start accepts. Automaton has 7684 states and 12814 transitions. Word has length 5004
[2023-11-06 21:56:14,282 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:14,282 INFO  L495      AbstractCegarLoop]: Abstraction has 7684 states and 12814 transitions.
[2023-11-06 21:56:14,283 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 635.2857142857143) internal successors, (4447), 7 states have internal predecessors, (4447), 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 21:56:14,283 INFO  L276                IsEmpty]: Start isEmpty. Operand 7684 states and 12814 transitions.
[2023-11-06 21:56:14,445 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5006
[2023-11-06 21:56:14,445 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:14,449 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:14,529 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:14,667 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:14,668 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:14,668 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:14,670 INFO  L85        PathProgramCache]: Analyzing trace with hash 829599440, now seen corresponding path program 1 times
[2023-11-06 21:56:14,670 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:14,671 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612568299]
[2023-11-06 21:56:14,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:14,672 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:15,284 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:15,284 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332911933]
[2023-11-06 21:56:15,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:15,286 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:15,286 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:15,290 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:15,297 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 21:56:21,918 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:22,057 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22369 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:22,128 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:22,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked.
[2023-11-06 21:56:22,597 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:22,597 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:22,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612568299]
[2023-11-06 21:56:22,597 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:22,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332911933]
[2023-11-06 21:56:22,598 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332911933] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:22,598 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:22,599 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:22,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152871292]
[2023-11-06 21:56:22,599 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:22,605 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:22,605 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:22,611 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:22,611 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:22,613 INFO  L87              Difference]: Start difference. First operand 7684 states and 12814 transitions. Second operand  has 7 states, 7 states have (on average 635.7142857142857) internal successors, (4450), 7 states have internal predecessors, (4450), 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 21:56:23,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:23,155 INFO  L93              Difference]: Finished difference Result 20877 states and 34820 transitions.
[2023-11-06 21:56:23,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:23,157 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 635.7142857142857) internal successors, (4450), 7 states have internal predecessors, (4450), 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 5005
[2023-11-06 21:56:23,161 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:23,172 INFO  L225             Difference]: With dead ends: 20877
[2023-11-06 21:56:23,172 INFO  L226             Difference]: Without dead ends: 14265
[2023-11-06 21:56:23,180 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5014 GetRequests, 5002 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:23,180 INFO  L413           NwaCegarLoop]: 12766 mSDtfsCounter, 31770 mSDsluCounter, 49655 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31770 SdHoareTripleChecker+Valid, 62421 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:23,181 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31770 Valid, 62421 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:23,196 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14265 states.
[2023-11-06 21:56:23,419 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14265 to 7686.
[2023-11-06 21:56:23,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7686 states, 7685 states have (on average 1.6676642810670137) internal successors, (12816), 7685 states have internal predecessors, (12816), 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 21:56:23,441 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 12816 transitions.
[2023-11-06 21:56:23,442 INFO  L78                 Accepts]: Start accepts. Automaton has 7686 states and 12816 transitions. Word has length 5005
[2023-11-06 21:56:23,445 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:23,445 INFO  L495      AbstractCegarLoop]: Abstraction has 7686 states and 12816 transitions.
[2023-11-06 21:56:23,446 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 635.7142857142857) internal successors, (4450), 7 states have internal predecessors, (4450), 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 21:56:23,447 INFO  L276                IsEmpty]: Start isEmpty. Operand 7686 states and 12816 transitions.
[2023-11-06 21:56:23,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5007
[2023-11-06 21:56:23,618 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:23,622 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:56:23,700 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:23,849 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 21:56:23,849 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:23,850 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:23,852 INFO  L85        PathProgramCache]: Analyzing trace with hash 621834410, now seen corresponding path program 1 times
[2023-11-06 21:56:23,852 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:23,852 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364169975]
[2023-11-06 21:56:23,854 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:23,854 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:24,513 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:24,514 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437300185]
[2023-11-06 21:56:24,515 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:24,515 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:24,515 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:24,533 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:24,568 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 21:56:31,208 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:31,350 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22372 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:31,417 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:31,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked.
[2023-11-06 21:56:31,706 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:31,707 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:31,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364169975]
[2023-11-06 21:56:31,707 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:31,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437300185]
[2023-11-06 21:56:31,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437300185] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:31,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:31,708 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:31,708 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242228375]
[2023-11-06 21:56:31,708 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:31,714 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:31,714 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:31,719 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:31,719 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:31,720 INFO  L87              Difference]: Start difference. First operand 7686 states and 12816 transitions. Second operand  has 7 states, 7 states have (on average 636.1428571428571) internal successors, (4453), 7 states have internal predecessors, (4453), 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 21:56:32,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:32,245 INFO  L93              Difference]: Finished difference Result 20883 states and 34826 transitions.
[2023-11-06 21:56:32,246 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:32,247 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 636.1428571428571) internal successors, (4453), 7 states have internal predecessors, (4453), 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 5006
[2023-11-06 21:56:32,250 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:32,259 INFO  L225             Difference]: With dead ends: 20883
[2023-11-06 21:56:32,259 INFO  L226             Difference]: Without dead ends: 14266
[2023-11-06 21:56:32,266 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5015 GetRequests, 5003 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:32,267 INFO  L413           NwaCegarLoop]: 12761 mSDtfsCounter, 31769 mSDsluCounter, 49640 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31769 SdHoareTripleChecker+Valid, 62401 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:32,267 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31769 Valid, 62401 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:32,285 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14266 states.
[2023-11-06 21:56:32,418 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14266 to 7688.
[2023-11-06 21:56:32,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7688 states, 7687 states have (on average 1.6674905684922596) internal successors, (12818), 7687 states have internal predecessors, (12818), 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 21:56:32,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 12818 transitions.
[2023-11-06 21:56:32,439 INFO  L78                 Accepts]: Start accepts. Automaton has 7688 states and 12818 transitions. Word has length 5006
[2023-11-06 21:56:32,443 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:32,443 INFO  L495      AbstractCegarLoop]: Abstraction has 7688 states and 12818 transitions.
[2023-11-06 21:56:32,444 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 636.1428571428571) internal successors, (4453), 7 states have internal predecessors, (4453), 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 21:56:32,444 INFO  L276                IsEmpty]: Start isEmpty. Operand 7688 states and 12818 transitions.
[2023-11-06 21:56:32,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5008
[2023-11-06 21:56:32,662 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:32,665 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:56:32,746 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:32,881 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 21:56:32,881 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:32,882 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:32,884 INFO  L85        PathProgramCache]: Analyzing trace with hash 213033526, now seen corresponding path program 1 times
[2023-11-06 21:56:32,884 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:32,885 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724383726]
[2023-11-06 21:56:32,885 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:32,886 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:33,355 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:33,355 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440351268]
[2023-11-06 21:56:33,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:33,357 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:33,357 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:33,358 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:33,385 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 21:56:40,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:40,231 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22375 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:40,298 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:40,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2023-11-06 21:56:40,604 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:40,605 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:40,605 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724383726]
[2023-11-06 21:56:40,605 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:40,605 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440351268]
[2023-11-06 21:56:40,605 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440351268] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:40,605 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:40,607 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:40,607 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429536246]
[2023-11-06 21:56:40,607 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:40,612 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:40,612 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:40,617 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:40,617 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:40,618 INFO  L87              Difference]: Start difference. First operand 7688 states and 12818 transitions. Second operand  has 7 states, 7 states have (on average 636.5714285714286) internal successors, (4456), 7 states have internal predecessors, (4456), 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 21:56:41,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:41,145 INFO  L93              Difference]: Finished difference Result 20889 states and 34832 transitions.
[2023-11-06 21:56:41,145 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:41,146 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 636.5714285714286) internal successors, (4456), 7 states have internal predecessors, (4456), 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 5007
[2023-11-06 21:56:41,149 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:41,157 INFO  L225             Difference]: With dead ends: 20889
[2023-11-06 21:56:41,157 INFO  L226             Difference]: Without dead ends: 14267
[2023-11-06 21:56:41,160 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5016 GetRequests, 5004 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:41,161 INFO  L413           NwaCegarLoop]: 12756 mSDtfsCounter, 31768 mSDsluCounter, 49625 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31768 SdHoareTripleChecker+Valid, 62381 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:41,161 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31768 Valid, 62381 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:41,173 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14267 states.
[2023-11-06 21:56:41,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14267 to 7690.
[2023-11-06 21:56:41,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7690 states, 7689 states have (on average 1.6673169462869033) internal successors, (12820), 7689 states have internal predecessors, (12820), 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 21:56:41,276 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 12820 transitions.
[2023-11-06 21:56:41,276 INFO  L78                 Accepts]: Start accepts. Automaton has 7690 states and 12820 transitions. Word has length 5007
[2023-11-06 21:56:41,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:41,280 INFO  L495      AbstractCegarLoop]: Abstraction has 7690 states and 12820 transitions.
[2023-11-06 21:56:41,281 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 636.5714285714286) internal successors, (4456), 7 states have internal predecessors, (4456), 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 21:56:41,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 7690 states and 12820 transitions.
[2023-11-06 21:56:41,405 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5009
[2023-11-06 21:56:41,405 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:41,409 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:41,478 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:41,637 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 21:56:41,638 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:41,638 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:41,640 INFO  L85        PathProgramCache]: Analyzing trace with hash 771145926, now seen corresponding path program 1 times
[2023-11-06 21:56:41,640 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:41,640 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614823704]
[2023-11-06 21:56:41,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:41,641 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:42,095 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:42,096 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526495827]
[2023-11-06 21:56:42,097 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:42,097 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:42,098 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:42,098 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:42,128 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 21:56:48,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:48,787 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22379 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:48,856 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:49,318 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked.
[2023-11-06 21:56:49,318 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:49,319 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:49,319 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614823704]
[2023-11-06 21:56:49,319 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:49,319 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526495827]
[2023-11-06 21:56:49,319 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526495827] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:49,319 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:49,321 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:49,321 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051437398]
[2023-11-06 21:56:49,321 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:49,326 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:49,326 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:49,330 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:49,330 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:49,331 INFO  L87              Difference]: Start difference. First operand 7690 states and 12820 transitions. Second operand  has 7 states, 7 states have (on average 637.0) internal successors, (4459), 7 states have internal predecessors, (4459), 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 21:56:49,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:49,785 INFO  L93              Difference]: Finished difference Result 20895 states and 34838 transitions.
[2023-11-06 21:56:49,785 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:49,786 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 637.0) internal successors, (4459), 7 states have internal predecessors, (4459), 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 5008
[2023-11-06 21:56:49,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:49,803 INFO  L225             Difference]: With dead ends: 20895
[2023-11-06 21:56:49,803 INFO  L226             Difference]: Without dead ends: 14268
[2023-11-06 21:56:49,809 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5017 GetRequests, 5005 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:49,809 INFO  L413           NwaCegarLoop]: 12751 mSDtfsCounter, 31767 mSDsluCounter, 49610 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31767 SdHoareTripleChecker+Valid, 62361 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:49,810 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31767 Valid, 62361 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:49,823 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14268 states.
[2023-11-06 21:56:50,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 7692.
[2023-11-06 21:56:50,016 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7692 states, 7691 states have (on average 1.6671434143804447) internal successors, (12822), 7691 states have internal predecessors, (12822), 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 21:56:50,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 12822 transitions.
[2023-11-06 21:56:50,029 INFO  L78                 Accepts]: Start accepts. Automaton has 7692 states and 12822 transitions. Word has length 5008
[2023-11-06 21:56:50,033 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:50,033 INFO  L495      AbstractCegarLoop]: Abstraction has 7692 states and 12822 transitions.
[2023-11-06 21:56:50,034 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 637.0) internal successors, (4459), 7 states have internal predecessors, (4459), 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 21:56:50,034 INFO  L276                IsEmpty]: Start isEmpty. Operand 7692 states and 12822 transitions.
[2023-11-06 21:56:50,149 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5010
[2023-11-06 21:56:50,149 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:50,151 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:56:50,220 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 21:56:50,377 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 21:56:50,377 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:50,378 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:50,378 INFO  L85        PathProgramCache]: Analyzing trace with hash -538937314, now seen corresponding path program 1 times
[2023-11-06 21:56:50,378 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:50,379 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179496824]
[2023-11-06 21:56:50,379 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:50,379 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:50,842 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:50,842 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352966847]
[2023-11-06 21:56:50,844 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:50,844 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:50,844 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:50,845 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:50,852 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 21:56:57,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:56:57,572 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22382 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:56:57,639 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:56:58,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked.
[2023-11-06 21:56:58,083 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:56:58,083 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:56:58,083 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179496824]
[2023-11-06 21:56:58,083 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:56:58,083 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352966847]
[2023-11-06 21:56:58,083 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [352966847] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:56:58,083 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:56:58,085 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:56:58,085 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181617849]
[2023-11-06 21:56:58,085 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:56:58,088 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:56:58,088 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:56:58,093 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:56:58,093 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:56:58,095 INFO  L87              Difference]: Start difference. First operand 7692 states and 12822 transitions. Second operand  has 7 states, 7 states have (on average 637.4285714285714) internal successors, (4462), 7 states have internal predecessors, (4462), 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 21:56:58,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:56:58,523 INFO  L93              Difference]: Finished difference Result 20901 states and 34844 transitions.
[2023-11-06 21:56:58,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:56:58,525 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 637.4285714285714) internal successors, (4462), 7 states have internal predecessors, (4462), 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 5009
[2023-11-06 21:56:58,529 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:56:58,541 INFO  L225             Difference]: With dead ends: 20901
[2023-11-06 21:56:58,541 INFO  L226             Difference]: Without dead ends: 14269
[2023-11-06 21:56:58,548 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5018 GetRequests, 5006 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:56:58,549 INFO  L413           NwaCegarLoop]: 12746 mSDtfsCounter, 31766 mSDsluCounter, 49595 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31766 SdHoareTripleChecker+Valid, 62341 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:56:58,549 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31766 Valid, 62341 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:56:58,565 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14269 states.
[2023-11-06 21:56:58,670 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14269 to 7694.
[2023-11-06 21:56:58,678 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7694 states, 7693 states have (on average 1.6669699727024567) internal successors, (12824), 7693 states have internal predecessors, (12824), 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 21:56:58,691 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 12824 transitions.
[2023-11-06 21:56:58,691 INFO  L78                 Accepts]: Start accepts. Automaton has 7694 states and 12824 transitions. Word has length 5009
[2023-11-06 21:56:58,695 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:56:58,695 INFO  L495      AbstractCegarLoop]: Abstraction has 7694 states and 12824 transitions.
[2023-11-06 21:56:58,696 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 637.4285714285714) internal successors, (4462), 7 states have internal predecessors, (4462), 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 21:56:58,697 INFO  L276                IsEmpty]: Start isEmpty. Operand 7694 states and 12824 transitions.
[2023-11-06 21:56:58,908 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5011
[2023-11-06 21:56:58,908 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:56:58,909 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:58,972 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-06 21:56:59,110 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 21:56:59,110 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:56:59,111 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:56:59,112 INFO  L85        PathProgramCache]: Analyzing trace with hash -1749303712, now seen corresponding path program 1 times
[2023-11-06 21:56:59,112 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:56:59,112 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954772721]
[2023-11-06 21:56:59,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:59,112 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:56:59,688 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:56:59,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27443369]
[2023-11-06 21:56:59,689 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:56:59,690 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:56:59,690 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:56:59,691 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:56:59,698 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 21:57:06,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:57:06,382 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22385 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:57:06,440 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:57:06,726 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked.
[2023-11-06 21:57:06,726 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:57:06,726 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:57:06,726 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954772721]
[2023-11-06 21:57:06,727 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:57:06,727 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27443369]
[2023-11-06 21:57:06,727 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [27443369] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:57:06,727 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:57:06,728 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:57:06,728 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669315375]
[2023-11-06 21:57:06,728 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:57:06,730 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:57:06,731 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:57:06,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:57:06,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:57:06,736 INFO  L87              Difference]: Start difference. First operand 7694 states and 12824 transitions. Second operand  has 7 states, 7 states have (on average 637.8571428571429) internal successors, (4465), 7 states have internal predecessors, (4465), 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 21:57:07,272 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:57:07,273 INFO  L93              Difference]: Finished difference Result 20907 states and 34850 transitions.
[2023-11-06 21:57:07,273 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:57:07,274 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 637.8571428571429) internal successors, (4465), 7 states have internal predecessors, (4465), 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 5010
[2023-11-06 21:57:07,277 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:57:07,288 INFO  L225             Difference]: With dead ends: 20907
[2023-11-06 21:57:07,288 INFO  L226             Difference]: Without dead ends: 14270
[2023-11-06 21:57:07,294 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5019 GetRequests, 5007 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:57:07,295 INFO  L413           NwaCegarLoop]: 12741 mSDtfsCounter, 31765 mSDsluCounter, 49580 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31765 SdHoareTripleChecker+Valid, 62321 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:57:07,296 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31765 Valid, 62321 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:57:07,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14270 states.
[2023-11-06 21:57:07,408 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 7696.
[2023-11-06 21:57:07,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7696 states, 7695 states have (on average 1.6667966211825862) internal successors, (12826), 7695 states have internal predecessors, (12826), 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 21:57:07,429 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7696 states to 7696 states and 12826 transitions.
[2023-11-06 21:57:07,430 INFO  L78                 Accepts]: Start accepts. Automaton has 7696 states and 12826 transitions. Word has length 5010
[2023-11-06 21:57:07,433 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:57:07,434 INFO  L495      AbstractCegarLoop]: Abstraction has 7696 states and 12826 transitions.
[2023-11-06 21:57:07,435 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 637.8571428571429) internal successors, (4465), 7 states have internal predecessors, (4465), 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 21:57:07,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 7696 states and 12826 transitions.
[2023-11-06 21:57:07,581 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5012
[2023-11-06 21:57:07,581 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:57:07,582 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:57:07,644 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-06 21:57:07,783 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-06 21:57:07,784 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:57:07,784 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:57:07,785 INFO  L85        PathProgramCache]: Analyzing trace with hash -999297148, now seen corresponding path program 1 times
[2023-11-06 21:57:07,785 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:57:07,785 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680326858]
[2023-11-06 21:57:07,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:07,786 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:57:08,225 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:57:08,226 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944473011]
[2023-11-06 21:57:08,227 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:08,228 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:08,228 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:57:08,229 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:57:08,233 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 21:57:14,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:57:14,924 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22388 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:57:14,980 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:57:15,253 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked.
[2023-11-06 21:57:15,254 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:57:15,254 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:57:15,254 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680326858]
[2023-11-06 21:57:15,254 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:57:15,254 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944473011]
[2023-11-06 21:57:15,254 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944473011] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:57:15,254 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:57:15,256 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:57:15,256 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80190263]
[2023-11-06 21:57:15,256 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:57:15,258 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:57:15,258 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:57:15,261 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:57:15,261 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:57:15,262 INFO  L87              Difference]: Start difference. First operand 7696 states and 12826 transitions. Second operand  has 7 states, 7 states have (on average 638.2857142857143) internal successors, (4468), 7 states have internal predecessors, (4468), 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 21:57:15,820 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:57:15,821 INFO  L93              Difference]: Finished difference Result 20913 states and 34856 transitions.
[2023-11-06 21:57:15,821 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:57:15,822 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 638.2857142857143) internal successors, (4468), 7 states have internal predecessors, (4468), 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 5011
[2023-11-06 21:57:15,825 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:57:15,835 INFO  L225             Difference]: With dead ends: 20913
[2023-11-06 21:57:15,835 INFO  L226             Difference]: Without dead ends: 14271
[2023-11-06 21:57:15,840 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5020 GetRequests, 5008 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:57:15,841 INFO  L413           NwaCegarLoop]: 12736 mSDtfsCounter, 31764 mSDsluCounter, 49565 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31764 SdHoareTripleChecker+Valid, 62301 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:57:15,841 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31764 Valid, 62301 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:57:15,852 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14271 states.
[2023-11-06 21:57:15,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 7698.
[2023-11-06 21:57:15,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7698 states, 7697 states have (on average 1.6666233597505522) internal successors, (12828), 7697 states have internal predecessors, (12828), 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 21:57:15,939 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7698 states to 7698 states and 12828 transitions.
[2023-11-06 21:57:15,940 INFO  L78                 Accepts]: Start accepts. Automaton has 7698 states and 12828 transitions. Word has length 5011
[2023-11-06 21:57:15,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:57:15,943 INFO  L495      AbstractCegarLoop]: Abstraction has 7698 states and 12828 transitions.
[2023-11-06 21:57:15,944 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 638.2857142857143) internal successors, (4468), 7 states have internal predecessors, (4468), 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 21:57:15,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 7698 states and 12828 transitions.
[2023-11-06 21:57:16,051 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5013
[2023-11-06 21:57:16,052 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:57:16,053 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:57:16,111 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-06 21:57:16,253 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 21:57:16,254 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:57:16,254 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:57:16,255 INFO  L85        PathProgramCache]: Analyzing trace with hash 92075900, now seen corresponding path program 1 times
[2023-11-06 21:57:16,255 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:57:16,255 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680863917]
[2023-11-06 21:57:16,256 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:16,256 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:57:16,724 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:57:16,724 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603419461]
[2023-11-06 21:57:16,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:16,725 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:16,725 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:57:16,726 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:57:16,728 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 21:57:23,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:57:23,234 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22392 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:57:23,314 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:57:23,662 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked.
[2023-11-06 21:57:23,662 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:57:23,662 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:57:23,663 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680863917]
[2023-11-06 21:57:23,663 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:57:23,663 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603419461]
[2023-11-06 21:57:23,663 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603419461] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:57:23,663 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:57:23,664 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:57:23,665 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862539337]
[2023-11-06 21:57:23,665 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:57:23,669 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:57:23,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:57:23,673 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:57:23,674 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:57:23,675 INFO  L87              Difference]: Start difference. First operand 7698 states and 12828 transitions. Second operand  has 7 states, 7 states have (on average 638.7142857142857) internal successors, (4471), 7 states have internal predecessors, (4471), 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 21:57:24,233 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:57:24,233 INFO  L93              Difference]: Finished difference Result 20919 states and 34862 transitions.
[2023-11-06 21:57:24,234 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:57:24,235 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 638.7142857142857) internal successors, (4471), 7 states have internal predecessors, (4471), 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 5012
[2023-11-06 21:57:24,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:57:24,252 INFO  L225             Difference]: With dead ends: 20919
[2023-11-06 21:57:24,252 INFO  L226             Difference]: Without dead ends: 14272
[2023-11-06 21:57:24,259 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5021 GetRequests, 5009 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:57:24,260 INFO  L413           NwaCegarLoop]: 12731 mSDtfsCounter, 31763 mSDsluCounter, 49550 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31763 SdHoareTripleChecker+Valid, 62281 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:57:24,260 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31763 Valid, 62281 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:57:24,274 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14272 states.
[2023-11-06 21:57:24,402 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 7700.
[2023-11-06 21:57:24,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7700 states, 7699 states have (on average 1.6664501883361476) internal successors, (12830), 7699 states have internal predecessors, (12830), 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 21:57:24,420 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7700 states to 7700 states and 12830 transitions.
[2023-11-06 21:57:24,420 INFO  L78                 Accepts]: Start accepts. Automaton has 7700 states and 12830 transitions. Word has length 5012
[2023-11-06 21:57:24,424 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:57:24,424 INFO  L495      AbstractCegarLoop]: Abstraction has 7700 states and 12830 transitions.
[2023-11-06 21:57:24,425 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 638.7142857142857) internal successors, (4471), 7 states have internal predecessors, (4471), 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 21:57:24,425 INFO  L276                IsEmpty]: Start isEmpty. Operand 7700 states and 12830 transitions.
[2023-11-06 21:57:24,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5014
[2023-11-06 21:57:24,678 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:57:24,680 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:57:24,747 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-06 21:57:24,905 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:24,905 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:57:24,906 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:57:24,907 INFO  L85        PathProgramCache]: Analyzing trace with hash -1853073812, now seen corresponding path program 1 times
[2023-11-06 21:57:24,907 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:57:24,907 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079676743]
[2023-11-06 21:57:24,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:24,908 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:57:25,467 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:57:25,467 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278444835]
[2023-11-06 21:57:25,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:25,469 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:25,469 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:57:25,470 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:57:25,474 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 21:57:32,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 21:57:32,348 INFO  L262         TraceCheckSpWp]: Trace formula consists of 22395 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 21:57:32,431 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 21:57:32,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 572 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked.
[2023-11-06 21:57:32,786 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 21:57:32,786 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 21:57:32,787 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079676743]
[2023-11-06 21:57:32,787 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 21:57:32,787 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278444835]
[2023-11-06 21:57:32,787 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278444835] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 21:57:32,787 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 21:57:32,788 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 21:57:32,789 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156461284]
[2023-11-06 21:57:32,789 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 21:57:32,793 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 21:57:32,793 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 21:57:32,797 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 21:57:32,797 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 21:57:32,798 INFO  L87              Difference]: Start difference. First operand 7700 states and 12830 transitions. Second operand  has 7 states, 7 states have (on average 639.1428571428571) internal successors, (4474), 7 states have internal predecessors, (4474), 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 21:57:33,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 21:57:33,414 INFO  L93              Difference]: Finished difference Result 20925 states and 34868 transitions.
[2023-11-06 21:57:33,414 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 21:57:33,415 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 639.1428571428571) internal successors, (4474), 7 states have internal predecessors, (4474), 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 5013
[2023-11-06 21:57:33,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 21:57:33,433 INFO  L225             Difference]: With dead ends: 20925
[2023-11-06 21:57:33,433 INFO  L226             Difference]: Without dead ends: 14273
[2023-11-06 21:57:33,441 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5022 GetRequests, 5010 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 21:57:33,442 INFO  L413           NwaCegarLoop]: 12726 mSDtfsCounter, 31762 mSDsluCounter, 49535 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31762 SdHoareTripleChecker+Valid, 62261 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 21:57:33,443 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31762 Valid, 62261 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 21:57:33,461 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2023-11-06 21:57:33,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 7702.
[2023-11-06 21:57:33,569 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7702 states, 7701 states have (on average 1.6662771068692377) internal successors, (12832), 7701 states have internal predecessors, (12832), 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 21:57:33,581 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7702 states to 7702 states and 12832 transitions.
[2023-11-06 21:57:33,581 INFO  L78                 Accepts]: Start accepts. Automaton has 7702 states and 12832 transitions. Word has length 5013
[2023-11-06 21:57:33,585 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 21:57:33,585 INFO  L495      AbstractCegarLoop]: Abstraction has 7702 states and 12832 transitions.
[2023-11-06 21:57:33,586 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 639.1428571428571) internal successors, (4474), 7 states have internal predecessors, (4474), 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 21:57:33,586 INFO  L276                IsEmpty]: Start isEmpty. Operand 7702 states and 12832 transitions.
[2023-11-06 21:57:33,846 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5015
[2023-11-06 21:57:33,846 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 21:57:33,848 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 21:57:33,909 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-06 21:57:34,048 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:34,049 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 21:57:34,049 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 21:57:34,050 INFO  L85        PathProgramCache]: Analyzing trace with hash 4051222, now seen corresponding path program 1 times
[2023-11-06 21:57:34,050 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 21:57:34,050 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449077789]
[2023-11-06 21:57:34,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:34,051 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 21:57:34,598 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 21:57:34,598 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908492941]
[2023-11-06 21:57:34,600 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 21:57:34,600 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 21:57:34,601 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 21:57:34,602 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 21:57:34,605 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ed69e2-06bf-44d4-bdbc-8cdeea096a7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process