./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/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 00b3b9d9d2f68c742299ba5330b71d2b4c433ea994898131b47e5df2347c7539
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:53:09,789 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:53:09,950 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:53:09,966 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:53:09,968 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:53:10,032 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:53:10,033 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:53:10,034 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:53:10,037 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:53:10,043 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:53:10,044 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:53:10,045 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:53:10,045 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:53:10,048 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:53:10,048 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:53:10,049 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:53:10,050 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:53:10,050 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:53:10,051 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:53:10,052 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:53:10,052 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:53:10,053 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:53:10,055 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:53:10,055 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:53:10,056 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:53:10,056 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:53:10,057 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:53:10,058 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:53:10,059 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:53:10,059 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:53:10,061 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:53:10,062 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:53:10,062 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:53:10,062 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:53:10,063 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:53:10,063 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:53:10,078 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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/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 -> 00b3b9d9d2f68c742299ba5330b71d2b4c433ea994898131b47e5df2347c7539
[2023-11-06 22:53:10,456 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:53:10,534 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:53:10,538 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:53:10,540 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:53:10,542 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:53:10,544 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-06 22:53:14,256 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:53:15,165 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:53:15,166 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-06 22:53:15,267 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/data/87776878b/0bccb41fbaf44eafbaa8a8f299afe200/FLAG84403b7a2
[2023-11-06 22:53:15,289 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/data/87776878b/0bccb41fbaf44eafbaa8a8f299afe200
[2023-11-06 22:53:15,298 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:53:15,302 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:53:15,306 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:53:15,308 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:53:15,315 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:53:15,316 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:15" (1/1) ...
[2023-11-06 22:53:15,318 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be11232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15, skipping insertion in model container
[2023-11-06 22:53:15,318 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:15" (1/1) ...
[2023-11-06 22:53:15,708 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:53:16,150 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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1175,1188]
[2023-11-06 22:53:18,024 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:53:18,038 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:53:18,054 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_bc11bfae-dcb8-480f-918f-0d4673edbbb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1175,1188]
[2023-11-06 22:53:19,522 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:53:19,542 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:53:19,543 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19 WrapperNode
[2023-11-06 22:53:19,544 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:53:19,546 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:53:19,546 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:53:19,546 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:53:19,555 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:19,933 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:24,144 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38656
[2023-11-06 22:53:24,144 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:53:24,145 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:53:24,146 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:53:24,146 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:53:24,158 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:24,158 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:25,106 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:25,119 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:26,383 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:26,544 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:27,212 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:27,341 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:27,997 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:53:27,998 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:53:27,999 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:53:27,999 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:53:28,000 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ...
[2023-11-06 22:53:28,010 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:53:28,029 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:53:28,053 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:53:28,074 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:53:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:53:28,106 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:53:28,107 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:53:28,107 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:53:31,716 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:53:31,719 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:53:57,903 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:53:57,969 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:53:57,969 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:53:57,977 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:57 BoogieIcfgContainer
[2023-11-06 22:53:57,977 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:53:57,980 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:53:57,980 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:53:57,984 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:53:57,984 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:15" (1/3) ...
[2023-11-06 22:53:57,985 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22395eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:57, skipping insertion in model container
[2023-11-06 22:53:57,985 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (2/3) ...
[2023-11-06 22:53:57,986 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22395eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:57, skipping insertion in model container
[2023-11-06 22:53:57,986 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:57" (3/3) ...
[2023-11-06 22:53:57,987 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-06 22:53:58,008 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:53:58,009 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:53:58,195 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:53:58,203 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;@3aafccfa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:53:58,203 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:53:58,230 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6754 states, 6752 states have (on average 1.6703199052132702) internal successors, (11278), 6753 states have internal predecessors, (11278), 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 22:53:58,250 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 184
[2023-11-06 22:53:58,250 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:53:58,251 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]
[2023-11-06 22:53:58,252 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:53:58,257 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:53:58,258 INFO  L85        PathProgramCache]: Analyzing trace with hash 2059011558, now seen corresponding path program 1 times
[2023-11-06 22:53:58,268 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:53:58,269 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176688280]
[2023-11-06 22:53:58,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:53:58,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:53:59,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:00,168 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 22:54:00,169 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:00,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176688280]
[2023-11-06 22:54:00,170 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176688280] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:00,170 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:00,170 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:54:00,172 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574476658]
[2023-11-06 22:54:00,173 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:00,180 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:54:00,181 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:00,225 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:54:00,226 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:54:00,244 INFO  L87              Difference]: Start difference. First operand  has 6754 states, 6752 states have (on average 1.6703199052132702) internal successors, (11278), 6753 states have internal predecessors, (11278), 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 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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 22:54:00,754 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:00,754 INFO  L93              Difference]: Finished difference Result 13294 states and 22204 transitions.
[2023-11-06 22:54:00,755 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:54:00,757 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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 183
[2023-11-06 22:54:00,759 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:00,823 INFO  L225             Difference]: With dead ends: 13294
[2023-11-06 22:54:00,823 INFO  L226             Difference]: Without dead ends: 6752
[2023-11-06 22:54:00,843 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 22:54:00,847 INFO  L413           NwaCegarLoop]: 11270 mSDtfsCounter, 1 mSDsluCounter, 22534 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33804 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:00,848 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33804 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:54:00,884 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6752 states.
[2023-11-06 22:54:01,059 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6752 to 6752.
[2023-11-06 22:54:01,078 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6752 states, 6751 states have (on average 1.6699748185454006) internal successors, (11274), 6751 states have internal predecessors, (11274), 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 22:54:01,105 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6752 states to 6752 states and 11274 transitions.
[2023-11-06 22:54:01,107 INFO  L78                 Accepts]: Start accepts. Automaton has 6752 states and 11274 transitions. Word has length 183
[2023-11-06 22:54:01,110 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:01,111 INFO  L495      AbstractCegarLoop]: Abstraction has 6752 states and 11274 transitions.
[2023-11-06 22:54:01,111 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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 22:54:01,112 INFO  L276                IsEmpty]: Start isEmpty. Operand 6752 states and 11274 transitions.
[2023-11-06 22:54:01,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 185
[2023-11-06 22:54:01,122 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:01,123 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]
[2023-11-06 22:54:01,123 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:54:01,124 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:01,125 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:01,125 INFO  L85        PathProgramCache]: Analyzing trace with hash -593425126, now seen corresponding path program 1 times
[2023-11-06 22:54:01,125 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:01,125 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601353701]
[2023-11-06 22:54:01,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:01,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:01,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:02,001 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 22:54:02,002 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:02,003 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601353701]
[2023-11-06 22:54:02,003 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601353701] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:02,003 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:02,003 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:54:02,004 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390266461]
[2023-11-06 22:54:02,004 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:02,006 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:54:02,007 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:02,007 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:54:02,008 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:54:02,008 INFO  L87              Difference]: Start difference. First operand 6752 states and 11274 transitions. Second operand  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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 22:54:02,434 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:02,435 INFO  L93              Difference]: Finished difference Result 13295 states and 22200 transitions.
[2023-11-06 22:54:02,435 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:54:02,436 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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 184
[2023-11-06 22:54:02,439 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:02,477 INFO  L225             Difference]: With dead ends: 13295
[2023-11-06 22:54:02,477 INFO  L226             Difference]: Without dead ends: 6755
[2023-11-06 22:54:02,490 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 22:54:02,492 INFO  L413           NwaCegarLoop]: 11270 mSDtfsCounter, 1 mSDsluCounter, 22531 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33801 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:02,493 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33801 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:54:02,509 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6755 states.
[2023-11-06 22:54:02,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6754.
[2023-11-06 22:54:02,660 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6754 states, 6753 states have (on average 1.669776395675996) internal successors, (11276), 6753 states have internal predecessors, (11276), 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 22:54:02,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 11276 transitions.
[2023-11-06 22:54:02,688 INFO  L78                 Accepts]: Start accepts. Automaton has 6754 states and 11276 transitions. Word has length 184
[2023-11-06 22:54:02,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:02,689 INFO  L495      AbstractCegarLoop]: Abstraction has 6754 states and 11276 transitions.
[2023-11-06 22:54:02,689 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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 22:54:02,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 6754 states and 11276 transitions.
[2023-11-06 22:54:02,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 186
[2023-11-06 22:54:02,692 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:02,692 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]
[2023-11-06 22:54:02,693 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:54:02,693 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:02,693 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:02,694 INFO  L85        PathProgramCache]: Analyzing trace with hash -1426741120, now seen corresponding path program 1 times
[2023-11-06 22:54:02,694 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:02,694 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064586911]
[2023-11-06 22:54:02,694 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:02,695 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:02,934 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:03,289 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 22:54:03,290 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:03,290 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064586911]
[2023-11-06 22:54:03,291 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064586911] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:03,291 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:03,292 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:54:03,292 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36384207]
[2023-11-06 22:54:03,292 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:03,293 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:54:03,293 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:03,294 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:54:03,294 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:54:03,295 INFO  L87              Difference]: Start difference. First operand 6754 states and 11276 transitions. Second operand  has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 22:54:03,897 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:03,897 INFO  L93              Difference]: Finished difference Result 19828 states and 33109 transitions.
[2023-11-06 22:54:03,898 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:54:03,898 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 185
[2023-11-06 22:54:03,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:03,964 INFO  L225             Difference]: With dead ends: 19828
[2023-11-06 22:54:03,965 INFO  L226             Difference]: Without dead ends: 13286
[2023-11-06 22:54:03,975 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 22:54:03,977 INFO  L413           NwaCegarLoop]: 11351 mSDtfsCounter, 10906 mSDsluCounter, 22608 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10906 SdHoareTripleChecker+Valid, 33959 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:03,977 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10906 Valid, 33959 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:54:03,999 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13286 states.
[2023-11-06 22:54:04,166 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13286 to 6756.
[2023-11-06 22:54:04,177 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6756 states, 6755 states have (on average 1.669578090303479) internal successors, (11278), 6755 states have internal predecessors, (11278), 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 22:54:04,196 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6756 states to 6756 states and 11278 transitions.
[2023-11-06 22:54:04,197 INFO  L78                 Accepts]: Start accepts. Automaton has 6756 states and 11278 transitions. Word has length 185
[2023-11-06 22:54:04,197 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:04,198 INFO  L495      AbstractCegarLoop]: Abstraction has 6756 states and 11278 transitions.
[2023-11-06 22:54:04,199 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 22:54:04,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 6756 states and 11278 transitions.
[2023-11-06 22:54:04,201 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 187
[2023-11-06 22:54:04,201 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:04,202 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]
[2023-11-06 22:54:04,202 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:54:04,202 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:04,203 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:04,203 INFO  L85        PathProgramCache]: Analyzing trace with hash 320606080, now seen corresponding path program 1 times
[2023-11-06 22:54:04,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:04,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474921836]
[2023-11-06 22:54:04,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:04,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:04,431 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:04,878 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 22:54:04,878 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:04,879 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474921836]
[2023-11-06 22:54:04,879 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474921836] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:04,879 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:04,879 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:54:04,880 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811278370]
[2023-11-06 22:54:04,880 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:04,880 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:54:04,881 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:04,881 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:54:04,881 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:54:04,882 INFO  L87              Difference]: Start difference. First operand 6756 states and 11278 transitions. Second operand  has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 22:54:05,578 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:05,579 INFO  L93              Difference]: Finished difference Result 19885 states and 33200 transitions.
[2023-11-06 22:54:05,579 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:54:05,579 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 186
[2023-11-06 22:54:05,580 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:05,606 INFO  L225             Difference]: With dead ends: 19885
[2023-11-06 22:54:05,607 INFO  L226             Difference]: Without dead ends: 13341
[2023-11-06 22:54:05,615 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 22:54:05,625 INFO  L413           NwaCegarLoop]: 11347 mSDtfsCounter, 43911 mSDsluCounter, 22530 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43911 SdHoareTripleChecker+Valid, 33877 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:05,626 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43911 Valid, 33877 Invalid, 20 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:54:05,651 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13341 states.
[2023-11-06 22:54:05,813 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 6807.
[2023-11-06 22:54:05,822 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6695562738759917) internal successors, (11363), 6806 states have internal predecessors, (11363), 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 22:54:05,839 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11363 transitions.
[2023-11-06 22:54:05,840 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11363 transitions. Word has length 186
[2023-11-06 22:54:05,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:05,840 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11363 transitions.
[2023-11-06 22:54:05,841 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 22:54:05,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11363 transitions.
[2023-11-06 22:54:06,077 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4492
[2023-11-06 22:54:06,078 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:06,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:54:06,082 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-06 22:54:06,082 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:06,083 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:06,085 INFO  L85        PathProgramCache]: Analyzing trace with hash -1422085167, now seen corresponding path program 1 times
[2023-11-06 22:54:06,086 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:06,086 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001065458]
[2023-11-06 22:54:06,087 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:06,088 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:07,167 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:54:07,167 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556403895]
[2023-11-06 22:54:07,169 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:07,169 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:54:07,170 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:54:07,173 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:54:07,175 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:54:21,021 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:21,288 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39062 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:54:21,496 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:54:23,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:54:23,536 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:54:23,537 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:23,537 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001065458]
[2023-11-06 22:54:23,537 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:54:23,537 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556403895]
[2023-11-06 22:54:23,537 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [556403895] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:23,538 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:23,539 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:54:23,539 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845341487]
[2023-11-06 22:54:23,540 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:23,546 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:54:23,547 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:23,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:54:23,553 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:54:23,555 INFO  L87              Difference]: Start difference. First operand 6807 states and 11363 transitions. Second operand  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 4 states have internal predecessors, (4491), 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 22:54:29,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:29,534 INFO  L93              Difference]: Finished difference Result 13727 states and 22916 transitions.
[2023-11-06 22:54:29,535 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:54:29,536 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 4 states have internal predecessors, (4491), 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 4491
[2023-11-06 22:54:29,537 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:29,551 INFO  L225             Difference]: With dead ends: 13727
[2023-11-06 22:54:29,551 INFO  L226             Difference]: Without dead ends: 7183
[2023-11-06 22:54:29,559 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4491 GetRequests, 4488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:54:29,560 INFO  L413           NwaCegarLoop]: 8540 mSDtfsCounter, 21771 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21771 SdHoareTripleChecker+Valid, 9435 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:29,560 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21771 Valid, 9435 Invalid, 3612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time]
[2023-11-06 22:54:29,572 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7183 states.
[2023-11-06 22:54:29,674 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7183 to 6807.
[2023-11-06 22:54:29,684 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6694093446958567) internal successors, (11362), 6806 states have internal predecessors, (11362), 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 22:54:29,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11362 transitions.
[2023-11-06 22:54:29,706 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11362 transitions. Word has length 4491
[2023-11-06 22:54:29,708 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:29,708 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11362 transitions.
[2023-11-06 22:54:29,709 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 4 states have internal predecessors, (4491), 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 22:54:29,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11362 transitions.
[2023-11-06 22:54:29,857 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4493
[2023-11-06 22:54:29,857 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:29,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:54:30,015 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:54:30,085 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:54:30,086 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:30,087 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:30,089 INFO  L85        PathProgramCache]: Analyzing trace with hash -894346442, now seen corresponding path program 1 times
[2023-11-06 22:54:30,089 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:30,089 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514070941]
[2023-11-06 22:54:30,090 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:30,091 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:31,041 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:54:31,041 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256997524]
[2023-11-06 22:54:31,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:31,043 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:54:31,043 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:54:31,046 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:54:31,054 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:54:44,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:54:44,944 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39063 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:54:45,097 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:54:47,048 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:54:47,048 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:54:47,048 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:54:47,048 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514070941]
[2023-11-06 22:54:47,049 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:54:47,053 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256997524]
[2023-11-06 22:54:47,054 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256997524] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:54:47,054 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:54:47,056 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:54:47,057 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235563523]
[2023-11-06 22:54:47,057 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:54:47,063 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:54:47,063 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:54:47,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:54:47,075 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:54:47,077 INFO  L87              Difference]: Start difference. First operand 6807 states and 11362 transitions. Second operand  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 4 states have internal predecessors, (4492), 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 22:54:52,993 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:54:52,994 INFO  L93              Difference]: Finished difference Result 13783 states and 23007 transitions.
[2023-11-06 22:54:52,994 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:54:52,995 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 4 states have internal predecessors, (4492), 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 4492
[2023-11-06 22:54:52,996 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:54:53,009 INFO  L225             Difference]: With dead ends: 13783
[2023-11-06 22:54:53,010 INFO  L226             Difference]: Without dead ends: 7239
[2023-11-06 22:54:53,018 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4492 GetRequests, 4489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:54:53,019 INFO  L413           NwaCegarLoop]: 8622 mSDtfsCounter, 21732 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21732 SdHoareTripleChecker+Valid, 9600 SdHoareTripleChecker+Invalid, 3632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time
[2023-11-06 22:54:53,019 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21732 Valid, 9600 Invalid, 3632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time]
[2023-11-06 22:54:53,031 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7239 states.
[2023-11-06 22:54:53,123 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7239 to 6807.
[2023-11-06 22:54:53,133 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6692624155157214) internal successors, (11361), 6806 states have internal predecessors, (11361), 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 22:54:53,144 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11361 transitions.
[2023-11-06 22:54:53,145 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11361 transitions. Word has length 4492
[2023-11-06 22:54:53,146 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:54:53,147 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11361 transitions.
[2023-11-06 22:54:53,148 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 4 states have internal predecessors, (4492), 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 22:54:53,148 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11361 transitions.
[2023-11-06 22:54:53,292 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4494
[2023-11-06 22:54:53,292 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:54:53,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:54:53,441 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:54:53,509 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:54:53,510 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:54:53,510 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:54:53,512 INFO  L85        PathProgramCache]: Analyzing trace with hash -2076212357, now seen corresponding path program 1 times
[2023-11-06 22:54:53,512 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:54:53,512 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078615687]
[2023-11-06 22:54:53,512 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:53,512 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:54:54,339 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:54:54,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642431038]
[2023-11-06 22:54:54,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:54:54,341 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:54:54,341 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:54:54,342 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:54:54,361 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:55:07,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:55:07,938 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39064 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:55:08,180 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:55:10,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:55:10,208 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:55:10,208 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:55:10,208 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078615687]
[2023-11-06 22:55:10,209 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:55:10,209 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642431038]
[2023-11-06 22:55:10,209 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [642431038] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:55:10,209 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:55:10,211 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:55:10,211 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710405678]
[2023-11-06 22:55:10,211 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:55:10,217 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:55:10,217 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:55:10,222 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:55:10,223 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:55:10,225 INFO  L87              Difference]: Start difference. First operand 6807 states and 11361 transitions. Second operand  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 4 states have internal predecessors, (4493), 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 22:55:15,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:55:15,674 INFO  L93              Difference]: Finished difference Result 13846 states and 23110 transitions.
[2023-11-06 22:55:15,675 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:55:15,676 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 4 states have internal predecessors, (4493), 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 4493
[2023-11-06 22:55:15,677 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:55:15,691 INFO  L225             Difference]: With dead ends: 13846
[2023-11-06 22:55:15,691 INFO  L226             Difference]: Without dead ends: 7302
[2023-11-06 22:55:15,698 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4493 GetRequests, 4490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:55:15,699 INFO  L413           NwaCegarLoop]: 8716 mSDtfsCounter, 21689 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21689 SdHoareTripleChecker+Valid, 9789 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2023-11-06 22:55:15,700 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21689 Valid, 9789 Invalid, 3652 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2023-11-06 22:55:15,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7302 states.
[2023-11-06 22:55:15,800 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7302 to 6807.
[2023-11-06 22:55:15,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6691154863355862) internal successors, (11360), 6806 states have internal predecessors, (11360), 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 22:55:15,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11360 transitions.
[2023-11-06 22:55:15,822 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11360 transitions. Word has length 4493
[2023-11-06 22:55:15,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:55:15,824 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11360 transitions.
[2023-11-06 22:55:15,825 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 4 states have internal predecessors, (4493), 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 22:55:15,825 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11360 transitions.
[2023-11-06 22:55:16,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4495
[2023-11-06 22:55:16,021 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:55:16,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:55:16,129 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:55:16,224 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:55:16,224 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:55:16,225 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:55:16,227 INFO  L85        PathProgramCache]: Analyzing trace with hash -1679763857, now seen corresponding path program 1 times
[2023-11-06 22:55:16,228 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:55:16,228 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612865218]
[2023-11-06 22:55:16,229 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:55:16,229 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:55:16,856 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:55:16,857 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813174460]
[2023-11-06 22:55:16,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:55:16,858 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:55:16,858 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:55:16,859 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:55:16,866 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:55:29,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:55:29,975 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39065 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:55:30,190 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:55:31,922 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:55:31,922 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:55:31,922 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:55:31,922 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612865218]
[2023-11-06 22:55:31,922 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:55:31,922 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813174460]
[2023-11-06 22:55:31,922 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813174460] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:55:31,922 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:55:31,924 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:55:31,924 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592388284]
[2023-11-06 22:55:31,924 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:55:31,931 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:55:31,931 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:55:31,936 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:55:31,936 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:55:31,938 INFO  L87              Difference]: Start difference. First operand 6807 states and 11360 transitions. Second operand  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 4 states have internal predecessors, (4494), 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 22:55:37,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:55:37,439 INFO  L93              Difference]: Finished difference Result 13850 states and 23114 transitions.
[2023-11-06 22:55:37,442 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:55:37,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 4 states have internal predecessors, (4494), 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 4494
[2023-11-06 22:55:37,444 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:55:37,463 INFO  L225             Difference]: With dead ends: 13850
[2023-11-06 22:55:37,463 INFO  L226             Difference]: Without dead ends: 7306
[2023-11-06 22:55:37,474 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4494 GetRequests, 4491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:55:37,476 INFO  L413           NwaCegarLoop]: 8720 mSDtfsCounter, 21684 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 3654 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21684 SdHoareTripleChecker+Valid, 9798 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time
[2023-11-06 22:55:37,476 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21684 Valid, 9798 Invalid, 3654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3654 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time]
[2023-11-06 22:55:37,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7306 states.
[2023-11-06 22:55:37,580 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 6807.
[2023-11-06 22:55:37,589 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6689685571554511) internal successors, (11359), 6806 states have internal predecessors, (11359), 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 22:55:37,599 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11359 transitions.
[2023-11-06 22:55:37,600 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11359 transitions. Word has length 4494
[2023-11-06 22:55:37,602 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:55:37,602 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11359 transitions.
[2023-11-06 22:55:37,603 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 4 states have internal predecessors, (4494), 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 22:55:37,603 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11359 transitions.
[2023-11-06 22:55:37,743 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4496
[2023-11-06 22:55:37,743 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:55:37,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:55:37,945 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:55:38,003 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:55:38,003 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:55:38,004 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:55:38,006 INFO  L85        PathProgramCache]: Analyzing trace with hash -827482448, now seen corresponding path program 1 times
[2023-11-06 22:55:38,006 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:55:38,006 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420684872]
[2023-11-06 22:55:38,007 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:55:38,007 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:55:38,634 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:55:38,635 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295578976]
[2023-11-06 22:55:38,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:55:38,636 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:55:38,636 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:55:38,638 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:55:38,641 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:55:51,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:55:51,957 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39066 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:55:52,252 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:55:54,261 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:55:54,262 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:55:54,262 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:55:54,262 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420684872]
[2023-11-06 22:55:54,262 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:55:54,262 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295578976]
[2023-11-06 22:55:54,263 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295578976] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:55:54,263 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:55:54,264 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:55:54,265 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984497229]
[2023-11-06 22:55:54,265 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:55:54,271 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:55:54,272 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:55:54,277 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:55:54,277 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:55:54,279 INFO  L87              Difference]: Start difference. First operand 6807 states and 11359 transitions. Second operand  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 4 states have internal predecessors, (4495), 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 22:55:59,850 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:55:59,850 INFO  L93              Difference]: Finished difference Result 13998 states and 23358 transitions.
[2023-11-06 22:55:59,851 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:55:59,851 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 4 states have internal predecessors, (4495), 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 4495
[2023-11-06 22:55:59,852 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:55:59,862 INFO  L225             Difference]: With dead ends: 13998
[2023-11-06 22:55:59,862 INFO  L226             Difference]: Without dead ends: 7454
[2023-11-06 22:55:59,871 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4495 GetRequests, 4492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:55:59,872 INFO  L413           NwaCegarLoop]: 8885 mSDtfsCounter, 21583 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21583 SdHoareTripleChecker+Valid, 10129 SdHoareTripleChecker+Invalid, 3814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time
[2023-11-06 22:55:59,872 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21583 Valid, 10129 Invalid, 3814 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time]
[2023-11-06 22:55:59,884 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7454 states.
[2023-11-06 22:55:59,974 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7454 to 6807.
[2023-11-06 22:55:59,981 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6688216279753159) internal successors, (11358), 6806 states have internal predecessors, (11358), 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 22:55:59,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11358 transitions.
[2023-11-06 22:55:59,992 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11358 transitions. Word has length 4495
[2023-11-06 22:55:59,994 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:55:59,994 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11358 transitions.
[2023-11-06 22:55:59,995 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 4 states have internal predecessors, (4495), 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 22:55:59,995 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11358 transitions.
[2023-11-06 22:56:00,220 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4497
[2023-11-06 22:56:00,221 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:56:00,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:56:00,340 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 22:56:00,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:56:00,441 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:56:00,441 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:56:00,443 INFO  L85        PathProgramCache]: Analyzing trace with hash -180154012, now seen corresponding path program 1 times
[2023-11-06 22:56:00,443 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:56:00,443 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498084726]
[2023-11-06 22:56:00,444 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:00,444 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:56:01,042 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:56:01,043 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087631968]
[2023-11-06 22:56:01,044 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:01,044 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:56:01,044 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:56:01,045 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:56:01,052 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:56:14,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:56:14,688 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39067 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-06 22:56:14,779 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:56:16,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:56:16,838 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:56:16,838 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:56:16,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498084726]
[2023-11-06 22:56:16,838 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:56:16,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087631968]
[2023-11-06 22:56:16,838 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087631968] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:56:16,838 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:56:16,840 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:56:16,840 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407809216]
[2023-11-06 22:56:16,840 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:56:16,846 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:56:16,846 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:56:16,851 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:56:16,851 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:56:16,853 INFO  L87              Difference]: Start difference. First operand 6807 states and 11358 transitions. Second operand  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 4 states have internal predecessors, (4496), 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 22:56:22,473 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:56:22,474 INFO  L93              Difference]: Finished difference Result 14002 states and 23362 transitions.
[2023-11-06 22:56:22,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:56:22,475 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 4 states have internal predecessors, (4496), 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 4496
[2023-11-06 22:56:22,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:56:22,488 INFO  L225             Difference]: With dead ends: 14002
[2023-11-06 22:56:22,488 INFO  L226             Difference]: Without dead ends: 7458
[2023-11-06 22:56:22,494 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4496 GetRequests, 4493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:56:22,495 INFO  L413           NwaCegarLoop]: 8889 mSDtfsCounter, 21578 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 3816 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21578 SdHoareTripleChecker+Valid, 10138 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time
[2023-11-06 22:56:22,495 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21578 Valid, 10138 Invalid, 3816 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3816 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time]
[2023-11-06 22:56:22,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7458 states.
[2023-11-06 22:56:22,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 6807.
[2023-11-06 22:56:22,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6807 states, 6806 states have (on average 1.6686746987951808) internal successors, (11357), 6806 states have internal predecessors, (11357), 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 22:56:22,603 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 11357 transitions.
[2023-11-06 22:56:22,604 INFO  L78                 Accepts]: Start accepts. Automaton has 6807 states and 11357 transitions. Word has length 4496
[2023-11-06 22:56:22,606 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:56:22,606 INFO  L495      AbstractCegarLoop]: Abstraction has 6807 states and 11357 transitions.
[2023-11-06 22:56:22,607 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 4 states have internal predecessors, (4496), 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 22:56:22,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 6807 states and 11357 transitions.
[2023-11-06 22:56:22,815 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4498
[2023-11-06 22:56:22,815 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:56:22,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-06 22:56:22,950 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:56:23,041 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:56:23,042 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:56:23,043 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:56:23,044 INFO  L85        PathProgramCache]: Analyzing trace with hash 1150455909, now seen corresponding path program 1 times
[2023-11-06 22:56:23,044 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:56:23,045 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648531410]
[2023-11-06 22:56:23,045 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:23,046 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:56:23,633 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:56:23,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731747727]
[2023-11-06 22:56:23,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:23,635 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:56:23,635 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:56:23,636 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:56:23,657 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc11bfae-dcb8-480f-918f-0d4673edbbb7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process