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


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/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_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/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_7004b609-16b7-4568-b099-68ceff9e9362/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 117312f10089d2cc67931235e0199eb498ae20d6e069fe62afb50fed34f4fb08
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 21:59:46,524 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 21:59:46,646 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 21:59:46,654 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 21:59:46,655 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 21:59:46,694 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 21:59:46,694 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 21:59:46,695 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 21:59:46,696 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 21:59:46,701 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 21:59:46,703 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 21:59:46,704 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 21:59:46,704 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 21:59:46,706 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 21:59:46,707 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 21:59:46,707 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 21:59:46,708 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 21:59:46,708 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 21:59:46,709 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 21:59:46,709 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 21:59:46,710 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 21:59:46,710 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 21:59:46,711 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 21:59:46,712 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 21:59:46,712 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 21:59:46,713 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 21:59:46,713 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 21:59:46,714 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 21:59:46,714 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 21:59:46,715 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 21:59:46,716 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 21:59:46,716 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 21:59:46,717 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 21:59:46,717 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 21:59:46,717 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 21:59:46,718 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 21:59:46,718 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_7004b609-16b7-4568-b099-68ceff9e9362/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_7004b609-16b7-4568-b099-68ceff9e9362/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 -> 117312f10089d2cc67931235e0199eb498ae20d6e069fe62afb50fed34f4fb08
[2023-11-06 21:59:46,996 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 21:59:47,020 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 21:59:47,023 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 21:59:47,024 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 21:59:47,025 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 21:59:47,026 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2023-11-06 21:59:50,225 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 21:59:51,074 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 21:59:51,075 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2023-11-06 21:59:51,250 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/data/76ea23e73/13d64dc84af7489ca1b67923f0626c5e/FLAG88736d3e7
[2023-11-06 21:59:51,269 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/data/76ea23e73/13d64dc84af7489ca1b67923f0626c5e
[2023-11-06 21:59:51,274 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 21:59:51,277 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 21:59:51,280 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 21:59:51,281 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 21:59:51,287 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 21:59:51,287 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:51" (1/1) ...
[2023-11-06 21:59:51,288 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c15de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:51, skipping insertion in model container
[2023-11-06 21:59:51,289 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:51" (1/1) ...
[2023-11-06 21:59:51,526 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 21:59:51,915 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_7004b609-16b7-4568-b099-68ceff9e9362/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c[1176,1189]
[2023-11-06 21:59:53,764 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 21:59:53,775 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 21:59:53,788 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_7004b609-16b7-4568-b099-68ceff9e9362/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c[1176,1189]
[2023-11-06 21:59:55,251 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 21:59:55,299 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 21:59:55,300 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55 WrapperNode
[2023-11-06 21:59:55,300 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 21:59:55,302 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 21:59:55,302 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 21:59:55,302 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 21:59:55,326 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 21:59:56,147 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 21:59:59,972 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40163
[2023-11-06 21:59:59,973 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 21:59:59,974 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 21:59:59,974 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 21:59:59,974 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 21:59:59,986 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 21:59:59,986 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:01,395 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:01,411 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:02,540 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:02,687 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:03,247 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:03,381 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:03,935 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:00:03,936 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:00:03,937 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:00:03,937 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:00:03,938 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (1/1) ...
[2023-11-06 22:00:03,946 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:00:03,958 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:00:03,973 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:00:03,996 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:00:04,013 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:00:04,014 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:00:04,014 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:00:04,014 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:00:07,317 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:00:07,318 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:00:30,631 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:00:30,706 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:00:30,706 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:00:30,715 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:30 BoogieIcfgContainer
[2023-11-06 22:00:30,715 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:00:30,718 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:00:30,718 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:00:30,723 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:00:30,723 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:59:51" (1/3) ...
[2023-11-06 22:00:30,724 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b74185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:30, skipping insertion in model container
[2023-11-06 22:00:30,724 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:55" (2/3) ...
[2023-11-06 22:00:30,726 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b74185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:30, skipping insertion in model container
[2023-11-06 22:00:30,727 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:30" (3/3) ...
[2023-11-06 22:00:30,729 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2023-11-06 22:00:30,752 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:00:30,753 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:00:30,969 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:00:30,978 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;@aae731d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:00:30,979 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:00:31,010 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6965 states, 6963 states have (on average 1.666379434151946) internal successors, (11603), 6964 states have internal predecessors, (11603), 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 22:00:31,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 460
[2023-11-06 22:00:31,049 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:00:31,050 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:00:31,051 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:00:31,056 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:00:31,057 INFO  L85        PathProgramCache]: Analyzing trace with hash -894903398, now seen corresponding path program 1 times
[2023-11-06 22:00:31,067 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:00:31,068 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589958989]
[2023-11-06 22:00:31,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:00:31,069 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:00:32,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:00:34,796 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 22:00:34,797 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:00:34,797 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589958989]
[2023-11-06 22:00:34,798 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589958989] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:00:34,799 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:00:34,799 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:00:34,800 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719473254]
[2023-11-06 22:00:34,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:00:34,810 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:00:34,810 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:00:34,853 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:00:34,854 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:00:34,875 INFO  L87              Difference]: Start difference. First operand  has 6965 states, 6963 states have (on average 1.666379434151946) internal successors, (11603), 6964 states have internal predecessors, (11603), 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 114.75) internal successors, (459), 4 states have internal predecessors, (459), 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 22:00:35,440 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:00:35,440 INFO  L93              Difference]: Finished difference Result 13713 states and 22849 transitions.
[2023-11-06 22:00:35,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:00:35,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 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 459
[2023-11-06 22:00:35,449 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:00:35,513 INFO  L225             Difference]: With dead ends: 13713
[2023-11-06 22:00:35,514 INFO  L226             Difference]: Without dead ends: 6963
[2023-11-06 22:00:35,535 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 22:00:35,540 INFO  L413           NwaCegarLoop]: 11595 mSDtfsCounter, 1 mSDsluCounter, 23184 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34779 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:00:35,541 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34779 Invalid, 11 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:00:35,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6963 states.
[2023-11-06 22:00:35,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 6963.
[2023-11-06 22:00:35,768 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6963 states, 6962 states have (on average 1.6660442401608733) internal successors, (11599), 6962 states have internal predecessors, (11599), 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 22:00:35,802 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 11599 transitions.
[2023-11-06 22:00:35,804 INFO  L78                 Accepts]: Start accepts. Automaton has 6963 states and 11599 transitions. Word has length 459
[2023-11-06 22:00:35,805 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:00:35,806 INFO  L495      AbstractCegarLoop]: Abstraction has 6963 states and 11599 transitions.
[2023-11-06 22:00:35,806 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 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 22:00:35,807 INFO  L276                IsEmpty]: Start isEmpty. Operand 6963 states and 11599 transitions.
[2023-11-06 22:00:35,818 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 461
[2023-11-06 22:00:35,819 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:00:35,819 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:00:35,820 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:00:35,820 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:00:35,821 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:00:35,821 INFO  L85        PathProgramCache]: Analyzing trace with hash -1970473890, now seen corresponding path program 1 times
[2023-11-06 22:00:35,822 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:00:35,822 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189593280]
[2023-11-06 22:00:35,822 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:00:35,823 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:00:36,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:00:37,484 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 22:00:37,484 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:00:37,485 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189593280]
[2023-11-06 22:00:37,485 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189593280] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:00:37,485 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:00:37,485 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:00:37,486 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585058298]
[2023-11-06 22:00:37,486 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:00:37,488 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:00:37,489 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:00:37,490 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:00:37,490 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:00:37,491 INFO  L87              Difference]: Start difference. First operand 6963 states and 11599 transitions. Second operand  has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 22:00:38,034 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:00:38,034 INFO  L93              Difference]: Finished difference Result 13714 states and 22845 transitions.
[2023-11-06 22:00:38,035 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:00:38,036 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 460
[2023-11-06 22:00:38,037 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:00:38,077 INFO  L225             Difference]: With dead ends: 13714
[2023-11-06 22:00:38,077 INFO  L226             Difference]: Without dead ends: 6966
[2023-11-06 22:00:38,090 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 22:00:38,093 INFO  L413           NwaCegarLoop]: 11595 mSDtfsCounter, 1 mSDsluCounter, 23181 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34776 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 22:00:38,095 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34776 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:00:38,114 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6966 states.
[2023-11-06 22:00:38,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 6965.
[2023-11-06 22:00:38,282 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6965 states, 6964 states have (on average 1.6658529580700747) internal successors, (11601), 6964 states have internal predecessors, (11601), 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 22:00:38,327 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 11601 transitions.
[2023-11-06 22:00:38,327 INFO  L78                 Accepts]: Start accepts. Automaton has 6965 states and 11601 transitions. Word has length 460
[2023-11-06 22:00:38,328 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:00:38,328 INFO  L495      AbstractCegarLoop]: Abstraction has 6965 states and 11601 transitions.
[2023-11-06 22:00:38,329 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 22:00:38,330 INFO  L276                IsEmpty]: Start isEmpty. Operand 6965 states and 11601 transitions.
[2023-11-06 22:00:38,341 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 462
[2023-11-06 22:00:38,341 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:00:38,342 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:00:38,342 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:00:38,342 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:00:38,343 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:00:38,344 INFO  L85        PathProgramCache]: Analyzing trace with hash 609429174, now seen corresponding path program 1 times
[2023-11-06 22:00:38,344 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:00:38,344 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605534610]
[2023-11-06 22:00:38,345 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:00:38,345 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:00:38,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:00:40,173 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 22:00:40,174 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:00:40,175 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605534610]
[2023-11-06 22:00:40,175 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605534610] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:00:40,176 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:00:40,177 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:00:40,177 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627582480]
[2023-11-06 22:00:40,177 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:00:40,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:00:40,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:00:40,180 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:00:40,180 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:00:40,181 INFO  L87              Difference]: Start difference. First operand 6965 states and 11601 transitions. Second operand  has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 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 22:00:40,977 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:00:40,977 INFO  L93              Difference]: Finished difference Result 20920 states and 34849 transitions.
[2023-11-06 22:00:40,978 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:00:40,978 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 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 461
[2023-11-06 22:00:40,980 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:00:41,064 INFO  L225             Difference]: With dead ends: 20920
[2023-11-06 22:00:41,065 INFO  L226             Difference]: Without dead ends: 14170
[2023-11-06 22:00:41,080 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 22:00:41,087 INFO  L413           NwaCegarLoop]: 12364 mSDtfsCounter, 45611 mSDsluCounter, 23183 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45611 SdHoareTripleChecker+Valid, 35547 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:00:41,089 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45611 Valid, 35547 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:00:41,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14170 states.
[2023-11-06 22:00:41,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14170 to 7429.
[2023-11-06 22:00:41,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7429 states, 7428 states have (on average 1.6657242864835757) internal successors, (12373), 7428 states have internal predecessors, (12373), 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 22:00:41,365 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 12373 transitions.
[2023-11-06 22:00:41,365 INFO  L78                 Accepts]: Start accepts. Automaton has 7429 states and 12373 transitions. Word has length 461
[2023-11-06 22:00:41,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:00:41,367 INFO  L495      AbstractCegarLoop]: Abstraction has 7429 states and 12373 transitions.
[2023-11-06 22:00:41,368 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 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 22:00:41,372 INFO  L276                IsEmpty]: Start isEmpty. Operand 7429 states and 12373 transitions.
[2023-11-06 22:00:41,750 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4959
[2023-11-06 22:00:41,751 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:00:41,755 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:00:41,755 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:00:41,755 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:00:41,756 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:00:41,759 INFO  L85        PathProgramCache]: Analyzing trace with hash -965364709, now seen corresponding path program 1 times
[2023-11-06 22:00:41,759 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:00:41,759 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797729253]
[2023-11-06 22:00:41,760 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:00:41,761 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:00:43,043 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:00:43,043 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865567549]
[2023-11-06 22:00:43,045 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:00:43,046 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:00:43,046 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:00:43,051 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:00:43,079 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:01:00,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:01:00,532 INFO  L262         TraceCheckSpWp]: Trace formula consists of 41778 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:01:00,948 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:01:01,865 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked.
[2023-11-06 22:01:01,865 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:01:02,099 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked.
[2023-11-06 22:01:02,100 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:01:02,100 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797729253]
[2023-11-06 22:01:02,100 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:01:02,100 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865567549]
[2023-11-06 22:01:02,100 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865567549] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:01:02,101 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:01:02,103 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 22:01:02,103 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301887205]
[2023-11-06 22:01:02,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:01:02,110 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:01:02,111 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:01:02,118 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:01:02,118 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 22:01:02,121 INFO  L87              Difference]: Start difference. First operand 7429 states and 12373 transitions. Second operand  has 5 states, 5 states have (on average 930.2) internal successors, (4651), 5 states have internal predecessors, (4651), 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 22:01:17,410 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:01:17,411 INFO  L93              Difference]: Finished difference Result 27030 states and 44812 transitions.
[2023-11-06 22:01:17,411 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:01:17,413 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 930.2) internal successors, (4651), 5 states have internal predecessors, (4651), 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 4958
[2023-11-06 22:01:17,423 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:01:17,448 INFO  L225             Difference]: With dead ends: 27030
[2023-11-06 22:01:17,448 INFO  L226             Difference]: Without dead ends: 14175
[2023-11-06 22:01:17,464 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9915 GetRequests, 9906 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 22:01:17,465 INFO  L413           NwaCegarLoop]: 18475 mSDtfsCounter, 20544 mSDsluCounter, 27298 mSDsCounter, 0 mSdLazyCounter, 11105 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20544 SdHoareTripleChecker+Valid, 45773 SdHoareTripleChecker+Invalid, 11745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 11105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-06 22:01:17,466 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20544 Valid, 45773 Invalid, 11745 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [640 Valid, 11105 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-06 22:01:17,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14175 states.
[2023-11-06 22:01:17,648 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14175 to 7429.
[2023-11-06 22:01:17,661 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7429 states, 7428 states have (on average 1.6657242864835757) internal successors, (12373), 7428 states have internal predecessors, (12373), 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 22:01:17,679 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 12373 transitions.
[2023-11-06 22:01:17,680 INFO  L78                 Accepts]: Start accepts. Automaton has 7429 states and 12373 transitions. Word has length 4958
[2023-11-06 22:01:17,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:01:17,689 INFO  L495      AbstractCegarLoop]: Abstraction has 7429 states and 12373 transitions.
[2023-11-06 22:01:17,691 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 930.2) internal successors, (4651), 5 states have internal predecessors, (4651), 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 22:01:17,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 7429 states and 12373 transitions.
[2023-11-06 22:01:17,941 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4960
[2023-11-06 22:01:17,942 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:01:17,946 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:01:18,119 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:01:18,159 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:01:18,160 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:01:18,161 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:01:18,164 INFO  L85        PathProgramCache]: Analyzing trace with hash 27761281, now seen corresponding path program 1 times
[2023-11-06 22:01:18,164 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:01:18,166 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907513232]
[2023-11-06 22:01:18,168 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:01:18,168 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:01:19,546 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:01:19,546 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715824885]
[2023-11-06 22:01:19,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:01:19,548 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:01:19,549 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:01:19,550 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:01:19,571 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:01:36,353 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:01:36,650 INFO  L262         TraceCheckSpWp]: Trace formula consists of 41781 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:01:36,870 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:01:37,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 8 proven. 197 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked.
[2023-11-06 22:01:37,777 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:01:37,987 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked.
[2023-11-06 22:01:37,987 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:01:37,987 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907513232]
[2023-11-06 22:01:37,988 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:01:37,988 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715824885]
[2023-11-06 22:01:37,988 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [715824885] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:01:37,988 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:01:37,990 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 22:01:37,991 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682832797]
[2023-11-06 22:01:37,991 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:01:37,998 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:01:37,998 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:01:38,003 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:01:38,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 22:01:38,008 INFO  L87              Difference]: Start difference. First operand 7429 states and 12373 transitions. Second operand  has 5 states, 5 states have (on average 930.8) internal successors, (4654), 5 states have internal predecessors, (4654), 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 22:01:48,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:01:48,521 INFO  L93              Difference]: Finished difference Result 27034 states and 44816 transitions.
[2023-11-06 22:01:48,521 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:01:48,522 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 930.8) internal successors, (4654), 5 states have internal predecessors, (4654), 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 4959
[2023-11-06 22:01:48,531 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:01:48,562 INFO  L225             Difference]: With dead ends: 27034
[2023-11-06 22:01:48,562 INFO  L226             Difference]: Without dead ends: 14174
[2023-11-06 22:01:48,578 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9917 GetRequests, 9908 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 22:01:48,579 INFO  L413           NwaCegarLoop]: 18467 mSDtfsCounter, 29847 mSDsluCounter, 18625 mSDsCounter, 0 mSdLazyCounter, 8541 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29847 SdHoareTripleChecker+Valid, 37092 SdHoareTripleChecker+Invalid, 9181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 8541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time
[2023-11-06 22:01:48,580 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29847 Valid, 37092 Invalid, 9181 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [640 Valid, 8541 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time]
[2023-11-06 22:01:48,597 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14174 states.
[2023-11-06 22:01:48,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14174 to 7431.
[2023-11-06 22:01:48,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7431 states, 7430 states have (on average 1.6655450874831763) internal successors, (12375), 7430 states have internal predecessors, (12375), 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 22:01:48,908 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 12375 transitions.
[2023-11-06 22:01:48,908 INFO  L78                 Accepts]: Start accepts. Automaton has 7431 states and 12375 transitions. Word has length 4959
[2023-11-06 22:01:48,917 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:01:48,917 INFO  L495      AbstractCegarLoop]: Abstraction has 7431 states and 12375 transitions.
[2023-11-06 22:01:48,918 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 930.8) internal successors, (4654), 5 states have internal predecessors, (4654), 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 22:01:48,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 7431 states and 12375 transitions.
[2023-11-06 22:01:49,088 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4961
[2023-11-06 22:01:49,088 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:01:49,092 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:01:49,231 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:01:49,311 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:01:49,312 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:01:49,313 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:01:49,315 INFO  L85        PathProgramCache]: Analyzing trace with hash 661799285, now seen corresponding path program 1 times
[2023-11-06 22:01:49,315 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:01:49,315 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764170815]
[2023-11-06 22:01:49,317 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:01:49,317 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:01:50,355 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:01:50,356 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180726013]
[2023-11-06 22:01:50,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:01:50,358 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:01:50,358 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:01:50,359 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:01:50,368 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:02:05,204 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:02:05,510 INFO  L262         TraceCheckSpWp]: Trace formula consists of 41784 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:02:05,844 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:02:06,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 10 proven. 197 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked.
[2023-11-06 22:02:06,588 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:02:06,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked.
[2023-11-06 22:02:06,805 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:02:06,806 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764170815]
[2023-11-06 22:02:06,806 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:02:06,806 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180726013]
[2023-11-06 22:02:06,806 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [180726013] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:02:06,806 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:02:06,808 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 22:02:06,809 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317451863]
[2023-11-06 22:02:06,809 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:02:06,815 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:02:06,816 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:02:06,821 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:02:06,821 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 22:02:06,823 INFO  L87              Difference]: Start difference. First operand 7431 states and 12375 transitions. Second operand  has 5 states, 5 states have (on average 931.4) internal successors, (4657), 5 states have internal predecessors, (4657), 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 22:02:18,433 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:02:18,434 INFO  L93              Difference]: Finished difference Result 27042 states and 44824 transitions.
[2023-11-06 22:02:18,434 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:02:18,435 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 931.4) internal successors, (4657), 5 states have internal predecessors, (4657), 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 4960
[2023-11-06 22:02:18,446 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:02:18,471 INFO  L225             Difference]: With dead ends: 27042
[2023-11-06 22:02:18,472 INFO  L226             Difference]: Without dead ends: 14175
[2023-11-06 22:02:18,483 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9919 GetRequests, 9910 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 22:02:18,484 INFO  L413           NwaCegarLoop]: 18459 mSDtfsCounter, 20534 mSDsluCounter, 27282 mSDsCounter, 0 mSdLazyCounter, 11105 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20534 SdHoareTripleChecker+Valid, 45741 SdHoareTripleChecker+Invalid, 11745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 11105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:02:18,485 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20534 Valid, 45741 Invalid, 11745 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [640 Valid, 11105 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time]
[2023-11-06 22:02:18,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14175 states.
[2023-11-06 22:02:18,626 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14175 to 7433.
[2023-11-06 22:02:18,636 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7433 states, 7432 states have (on average 1.6653659849300322) internal successors, (12377), 7432 states have internal predecessors, (12377), 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 22:02:18,649 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 12377 transitions.
[2023-11-06 22:02:18,649 INFO  L78                 Accepts]: Start accepts. Automaton has 7433 states and 12377 transitions. Word has length 4960
[2023-11-06 22:02:18,658 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:02:18,658 INFO  L495      AbstractCegarLoop]: Abstraction has 7433 states and 12377 transitions.
[2023-11-06 22:02:18,659 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 931.4) internal successors, (4657), 5 states have internal predecessors, (4657), 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 22:02:18,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 7433 states and 12377 transitions.
[2023-11-06 22:02:18,834 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4962
[2023-11-06 22:02:18,834 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:02:18,838 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:02:18,974 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:02:19,051 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:02:19,052 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:02:19,052 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:02:19,054 INFO  L85        PathProgramCache]: Analyzing trace with hash -1419068889, now seen corresponding path program 1 times
[2023-11-06 22:02:19,054 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:02:19,054 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699665530]
[2023-11-06 22:02:19,055 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:02:19,055 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:02:19,846 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:02:19,847 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766452035]
[2023-11-06 22:02:19,848 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:02:19,849 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:02:19,849 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:02:19,852 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:02:19,875 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:02:34,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:02:34,847 INFO  L262         TraceCheckSpWp]: Trace formula consists of 41787 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:02:35,146 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:02:35,870 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 12 proven. 197 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2023-11-06 22:02:35,871 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:02:36,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked.
[2023-11-06 22:02:36,057 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:02:36,058 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699665530]
[2023-11-06 22:02:36,058 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:02:36,058 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766452035]
[2023-11-06 22:02:36,058 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766452035] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:02:36,058 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:02:36,060 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 22:02:36,061 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088746727]
[2023-11-06 22:02:36,061 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:02:36,066 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:02:36,067 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:02:36,072 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:02:36,072 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 22:02:36,074 INFO  L87              Difference]: Start difference. First operand 7433 states and 12377 transitions. Second operand  has 5 states, 5 states have (on average 932.0) internal successors, (4660), 5 states have internal predecessors, (4660), 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 22:02:46,297 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:02:46,297 INFO  L93              Difference]: Finished difference Result 27050 states and 44832 transitions.
[2023-11-06 22:02:46,297 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:02:46,299 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 932.0) internal successors, (4660), 5 states have internal predecessors, (4660), 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 4961
[2023-11-06 22:02:46,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:02:46,431 INFO  L225             Difference]: With dead ends: 27050
[2023-11-06 22:02:46,431 INFO  L226             Difference]: Without dead ends: 14176
[2023-11-06 22:02:46,442 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9921 GetRequests, 9912 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-06 22:02:46,443 INFO  L413           NwaCegarLoop]: 18451 mSDtfsCounter, 29831 mSDsluCounter, 18615 mSDsCounter, 0 mSdLazyCounter, 8541 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29831 SdHoareTripleChecker+Valid, 37066 SdHoareTripleChecker+Invalid, 9181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 8541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time
[2023-11-06 22:02:46,444 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29831 Valid, 37066 Invalid, 9181 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [640 Valid, 8541 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time]
[2023-11-06 22:02:46,457 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14176 states.
[2023-11-06 22:02:46,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 7435.
[2023-11-06 22:02:46,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7435 states, 7434 states have (on average 1.6651869787463007) internal successors, (12379), 7434 states have internal predecessors, (12379), 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 22:02:46,598 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 12379 transitions.
[2023-11-06 22:02:46,599 INFO  L78                 Accepts]: Start accepts. Automaton has 7435 states and 12379 transitions. Word has length 4961
[2023-11-06 22:02:46,607 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:02:46,607 INFO  L495      AbstractCegarLoop]: Abstraction has 7435 states and 12379 transitions.
[2023-11-06 22:02:46,608 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 932.0) internal successors, (4660), 5 states have internal predecessors, (4660), 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 22:02:46,608 INFO  L276                IsEmpty]: Start isEmpty. Operand 7435 states and 12379 transitions.
[2023-11-06 22:02:46,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4963
[2023-11-06 22:02:46,780 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:02:46,784 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:02:46,928 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:02:47,007 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:02:47,008 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:02:47,008 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:02:47,010 INFO  L85        PathProgramCache]: Analyzing trace with hash 1883603025, now seen corresponding path program 1 times
[2023-11-06 22:02:47,010 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:02:47,010 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075684177]
[2023-11-06 22:02:47,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:02:47,012 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:02:47,833 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:02:47,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915844249]
[2023-11-06 22:02:47,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:02:47,835 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:02:47,836 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:02:47,840 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:02:47,844 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7004b609-16b7-4568-b099-68ceff9e9362/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:03:02,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:03:03,034 INFO  L262         TraceCheckSpWp]: Trace formula consists of 41791 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:03:03,145 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:03:03,824 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 14 proven. 197 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked.
[2023-11-06 22:03:03,824 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:03:03,960 INFO  L134       CoverageAnalysis]: Checked inductivity of 314 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked.
[2023-11-06 22:03:03,961 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:03:03,961 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075684177]
[2023-11-06 22:03:03,961 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:03:03,961 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915844249]
[2023-11-06 22:03:03,961 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [915844249] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:03:03,961 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:03:03,964 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-06 22:03:03,964 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203005095]
[2023-11-06 22:03:03,964 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:03:03,970 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:03:03,970 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:03:03,975 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:03:03,976 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-06 22:03:03,978 INFO  L87              Difference]: Start difference. First operand 7435 states and 12379 transitions. Second operand  has 5 states, 5 states have (on average 932.6) internal successors, (4663), 5 states have internal predecessors, (4663), 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)