./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/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 869700cd78f7d820cf3ed593e30455c067019e8d92906ad94f55889056be917a
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:31:46,166 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:31:46,289 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:31:46,302 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:31:46,303 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:31:46,349 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:31:46,349 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:31:46,350 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:31:46,351 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:31:46,360 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:31:46,361 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:31:46,362 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:31:46,362 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:31:46,364 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:31:46,365 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:31:46,365 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:31:46,366 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:31:46,366 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:31:46,367 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:31:46,367 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:31:46,368 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:31:46,369 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:31:46,370 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:31:46,372 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:31:46,373 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:31:46,373 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:31:46,374 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:31:46,374 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:31:46,375 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:31:46,375 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:31:46,377 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:31:46,377 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:31:46,378 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:31:46,378 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:31:46,378 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:31:46,378 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:31:46,379 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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/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 -> 869700cd78f7d820cf3ed593e30455c067019e8d92906ad94f55889056be917a
[2023-11-06 22:31:46,779 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:31:46,813 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:31:46,816 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:31:46,818 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:31:46,818 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:31:46,820 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c
[2023-11-06 22:31:50,126 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:31:50,701 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:31:50,702 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c
[2023-11-06 22:31:50,736 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/data/3370ab643/f256d3b32f9b47eca87c5c843a82cf75/FLAGd362ba685
[2023-11-06 22:31:50,761 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/data/3370ab643/f256d3b32f9b47eca87c5c843a82cf75
[2023-11-06 22:31:50,768 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:31:50,771 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:31:50,773 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:31:50,774 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:31:50,780 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:31:50,783 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:50" (1/1) ...
[2023-11-06 22:31:50,785 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441a6a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:50, skipping insertion in model container
[2023-11-06 22:31:50,785 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:50" (1/1) ...
[2023-11-06 22:31:50,977 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:31:51,377 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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c[1175,1188]
[2023-11-06 22:31:52,573 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:31:52,586 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:31:52,601 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_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop4-back-serstep.c[1175,1188]
[2023-11-06 22:31:53,148 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:31:53,166 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:31:53,167 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53 WrapperNode
[2023-11-06 22:31:53,167 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:31:53,168 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:31:53,168 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:31:53,168 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:31:53,177 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:53,455 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:56,048 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24886
[2023-11-06 22:31:56,049 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:31:56,050 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:31:56,050 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:31:56,051 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:31:56,064 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:56,064 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:56,879 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:56,880 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:57,769 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:57,961 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:58,176 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:58,289 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:59,154 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:31:59,156 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:31:59,157 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:31:59,157 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:31:59,158 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (1/1) ...
[2023-11-06 22:31:59,179 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:31:59,193 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:31:59,211 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:31:59,237 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:31:59,264 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:31:59,264 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:31:59,265 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:31:59,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:32:00,677 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:32:00,680 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:32:20,440 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:32:20,499 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:32:20,499 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:32:20,510 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:20 BoogieIcfgContainer
[2023-11-06 22:32:20,510 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:32:20,516 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:32:20,516 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:32:20,520 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:32:20,521 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:50" (1/3) ...
[2023-11-06 22:32:20,523 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc4f974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:20, skipping insertion in model container
[2023-11-06 22:32:20,523 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:53" (2/3) ...
[2023-11-06 22:32:20,525 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc4f974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:20, skipping insertion in model container
[2023-11-06 22:32:20,527 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:20" (3/3) ...
[2023-11-06 22:32:20,528 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.needham.3.prop4-back-serstep.c
[2023-11-06 22:32:20,553 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:32:20,554 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:32:20,790 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:32:20,800 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;@771c6756, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:32:20,801 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:32:20,833 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5871 states, 5869 states have (on average 1.6706423581530074) internal successors, (9805), 5870 states have internal predecessors, (9805), 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 22:32:20,901 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 612
[2023-11-06 22:32:20,904 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:20,906 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:20,908 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:20,917 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:20,918 INFO  L85        PathProgramCache]: Analyzing trace with hash 1758524264, now seen corresponding path program 1 times
[2023-11-06 22:32:20,931 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:20,932 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420481711]
[2023-11-06 22:32:20,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:20,934 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:22,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:25,428 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 22:32:25,433 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:25,433 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420481711]
[2023-11-06 22:32:25,434 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420481711] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:25,435 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:25,436 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:25,437 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318697230]
[2023-11-06 22:32:25,439 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:25,449 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:25,450 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:25,502 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:25,503 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:25,522 INFO  L87              Difference]: Start difference. First operand  has 5871 states, 5869 states have (on average 1.6706423581530074) internal successors, (9805), 5870 states have internal predecessors, (9805), 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 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 22:32:26,045 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:26,046 INFO  L93              Difference]: Finished difference Result 11558 states and 19308 transitions.
[2023-11-06 22:32:26,047 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:26,049 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 611
[2023-11-06 22:32:26,056 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:26,115 INFO  L225             Difference]: With dead ends: 11558
[2023-11-06 22:32:26,115 INFO  L226             Difference]: Without dead ends: 5869
[2023-11-06 22:32:26,133 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 22:32:26,137 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 1 mSDsluCounter, 19588 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29385 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:26,139 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29385 Invalid, 11 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:26,170 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5869 states.
[2023-11-06 22:32:26,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 5869.
[2023-11-06 22:32:26,336 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5869 states, 5868 states have (on average 1.6702453987730062) internal successors, (9801), 5868 states have internal predecessors, (9801), 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 22:32:26,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5869 states to 5869 states and 9801 transitions.
[2023-11-06 22:32:26,466 INFO  L78                 Accepts]: Start accepts. Automaton has 5869 states and 9801 transitions. Word has length 611
[2023-11-06 22:32:26,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:26,470 INFO  L495      AbstractCegarLoop]: Abstraction has 5869 states and 9801 transitions.
[2023-11-06 22:32:26,471 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 22:32:26,471 INFO  L276                IsEmpty]: Start isEmpty. Operand 5869 states and 9801 transitions.
[2023-11-06 22:32:26,492 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 613
[2023-11-06 22:32:26,492 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:26,493 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:26,494 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:32:26,494 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:26,495 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:26,496 INFO  L85        PathProgramCache]: Analyzing trace with hash -1318594080, now seen corresponding path program 1 times
[2023-11-06 22:32:26,496 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:26,496 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474215096]
[2023-11-06 22:32:26,497 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:26,497 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:26,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:28,775 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 22:32:28,776 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:28,777 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474215096]
[2023-11-06 22:32:28,778 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474215096] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:28,778 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:28,778 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:28,778 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719512789]
[2023-11-06 22:32:28,779 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:28,781 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:28,782 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:28,784 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:28,784 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:28,785 INFO  L87              Difference]: Start difference. First operand 5869 states and 9801 transitions. Second operand  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 22:32:29,111 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:29,112 INFO  L93              Difference]: Finished difference Result 11559 states and 19304 transitions.
[2023-11-06 22:32:29,112 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:29,113 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 612
[2023-11-06 22:32:29,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:29,151 INFO  L225             Difference]: With dead ends: 11559
[2023-11-06 22:32:29,151 INFO  L226             Difference]: Without dead ends: 5872
[2023-11-06 22:32:29,164 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 22:32:29,167 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 1 mSDsluCounter, 19585 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29382 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:29,168 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29382 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:29,182 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5872 states.
[2023-11-06 22:32:29,291 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5871.
[2023-11-06 22:32:29,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5871 states, 5870 states have (on average 1.6700170357751278) internal successors, (9803), 5870 states have internal predecessors, (9803), 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 22:32:29,348 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9803 transitions.
[2023-11-06 22:32:29,349 INFO  L78                 Accepts]: Start accepts. Automaton has 5871 states and 9803 transitions. Word has length 612
[2023-11-06 22:32:29,350 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:29,350 INFO  L495      AbstractCegarLoop]: Abstraction has 5871 states and 9803 transitions.
[2023-11-06 22:32:29,351 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 22:32:29,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 5871 states and 9803 transitions.
[2023-11-06 22:32:29,366 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 614
[2023-11-06 22:32:29,366 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:29,367 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:29,367 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:32:29,367 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:29,368 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:29,368 INFO  L85        PathProgramCache]: Analyzing trace with hash -657132284, now seen corresponding path program 1 times
[2023-11-06 22:32:29,368 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:29,369 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693952217]
[2023-11-06 22:32:29,369 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:29,369 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:29,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:31,328 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 22:32:31,329 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:31,330 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693952217]
[2023-11-06 22:32:31,330 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693952217] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:31,331 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:31,331 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:32:31,331 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105817956]
[2023-11-06 22:32:31,331 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:31,333 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:32:31,333 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:31,334 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:32:31,335 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:32:31,335 INFO  L87              Difference]: Start difference. First operand 5871 states and 9803 transitions. Second operand  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 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 22:32:31,995 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:31,995 INFO  L93              Difference]: Finished difference Result 17965 states and 30000 transitions.
[2023-11-06 22:32:31,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:32:31,996 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 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 613
[2023-11-06 22:32:31,998 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:32,087 INFO  L225             Difference]: With dead ends: 17965
[2023-11-06 22:32:32,088 INFO  L226             Difference]: Without dead ends: 12276
[2023-11-06 22:32:32,098 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 22:32:32,102 INFO  L413           NwaCegarLoop]: 11001 mSDtfsCounter, 38867 mSDsluCounter, 19587 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38867 SdHoareTripleChecker+Valid, 30588 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:32,107 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38867 Valid, 30588 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:32,132 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12276 states.
[2023-11-06 22:32:32,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 6596.
[2023-11-06 22:32:32,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6596 states, 6595 states have (on average 1.6694465504169826) internal successors, (11010), 6595 states have internal predecessors, (11010), 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 22:32:32,353 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 11010 transitions.
[2023-11-06 22:32:32,353 INFO  L78                 Accepts]: Start accepts. Automaton has 6596 states and 11010 transitions. Word has length 613
[2023-11-06 22:32:32,355 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:32,356 INFO  L495      AbstractCegarLoop]: Abstraction has 6596 states and 11010 transitions.
[2023-11-06 22:32:32,357 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 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 22:32:32,362 INFO  L276                IsEmpty]: Start isEmpty. Operand 6596 states and 11010 transitions.
[2023-11-06 22:32:32,986 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:32:32,986 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:32,989 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:32,990 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:32:32,991 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:32,993 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:32,995 INFO  L85        PathProgramCache]: Analyzing trace with hash -1646440508, now seen corresponding path program 1 times
[2023-11-06 22:32:32,995 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:33,002 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128935087]
[2023-11-06 22:32:33,004 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:33,004 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:33,827 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:33,828 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479440228]
[2023-11-06 22:32:33,829 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:33,830 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:33,830 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:33,837 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:33,852 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:32:40,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:40,169 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17759 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:40,296 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:40,573 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:40,573 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:40,573 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:40,574 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128935087]
[2023-11-06 22:32:40,574 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:40,574 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479440228]
[2023-11-06 22:32:40,575 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [479440228] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:40,575 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:40,576 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:40,577 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079178989]
[2023-11-06 22:32:40,577 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:40,585 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:40,585 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:40,594 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:40,594 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:40,597 INFO  L87              Difference]: Start difference. First operand 6596 states and 11010 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:40,971 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:40,971 INFO  L93              Difference]: Finished difference Result 12295 states and 20527 transitions.
[2023-11-06 22:32:40,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:40,974 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:32:40,976 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:40,991 INFO  L225             Difference]: With dead ends: 12295
[2023-11-06 22:32:40,991 INFO  L226             Difference]: Without dead ends: 6606
[2023-11-06 22:32:41,000 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:32:41,008 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:41,010 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:32:41,026 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6606 states.
[2023-11-06 22:32:41,193 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 6598.
[2023-11-06 22:32:41,207 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6598 states, 6597 states have (on average 1.6692435955737457) internal successors, (11012), 6597 states have internal predecessors, (11012), 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 22:32:41,236 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 11012 transitions.
[2023-11-06 22:32:41,236 INFO  L78                 Accepts]: Start accepts. Automaton has 6598 states and 11012 transitions. Word has length 4276
[2023-11-06 22:32:41,239 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:41,240 INFO  L495      AbstractCegarLoop]: Abstraction has 6598 states and 11012 transitions.
[2023-11-06 22:32:41,242 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:41,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 6598 states and 11012 transitions.
[2023-11-06 22:32:41,519 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:32:41,519 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:41,523 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:41,592 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:41,737 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:41,737 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:41,738 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:41,740 INFO  L85        PathProgramCache]: Analyzing trace with hash -4264686, now seen corresponding path program 1 times
[2023-11-06 22:32:41,740 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:41,740 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017285444]
[2023-11-06 22:32:41,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:41,742 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:42,647 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:42,648 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754732678]
[2023-11-06 22:32:42,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:42,649 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:42,650 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:42,651 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:42,669 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:32:48,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:49,119 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17760 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:49,260 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:49,519 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:49,519 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:49,519 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:49,520 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017285444]
[2023-11-06 22:32:49,520 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:49,520 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754732678]
[2023-11-06 22:32:49,520 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754732678] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:49,521 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:49,522 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:49,522 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970267362]
[2023-11-06 22:32:49,523 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:49,532 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:49,532 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:49,540 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:49,540 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:49,543 INFO  L87              Difference]: Start difference. First operand 6598 states and 11012 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:49,938 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:49,939 INFO  L93              Difference]: Finished difference Result 12298 states and 20529 transitions.
[2023-11-06 22:32:49,940 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:49,942 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:32:49,943 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:49,960 INFO  L225             Difference]: With dead ends: 12298
[2023-11-06 22:32:49,961 INFO  L226             Difference]: Without dead ends: 6607
[2023-11-06 22:32:49,969 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:32:49,970 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:49,971 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:32:49,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6607 states.
[2023-11-06 22:32:50,132 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6607 to 6599.
[2023-11-06 22:32:50,146 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6599 states, 6598 states have (on average 1.6691421642922097) internal successors, (11013), 6598 states have internal predecessors, (11013), 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 22:32:50,169 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6599 states to 6599 states and 11013 transitions.
[2023-11-06 22:32:50,169 INFO  L78                 Accepts]: Start accepts. Automaton has 6599 states and 11013 transitions. Word has length 4276
[2023-11-06 22:32:50,172 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:50,172 INFO  L495      AbstractCegarLoop]: Abstraction has 6599 states and 11013 transitions.
[2023-11-06 22:32:50,174 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:50,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 6599 states and 11013 transitions.
[2023-11-06 22:32:50,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:32:50,428 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:50,431 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:50,482 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-06 22:32:50,644 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:50,645 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:50,645 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:50,647 INFO  L85        PathProgramCache]: Analyzing trace with hash -812150944, now seen corresponding path program 1 times
[2023-11-06 22:32:50,647 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:50,648 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165347000]
[2023-11-06 22:32:50,648 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:50,649 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:51,467 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:51,472 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311078762]
[2023-11-06 22:32:51,474 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:51,475 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:51,475 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:51,476 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:51,488 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:32:57,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:57,345 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17761 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:57,455 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:57,681 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:57,681 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:57,682 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:57,682 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165347000]
[2023-11-06 22:32:57,682 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:57,682 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311078762]
[2023-11-06 22:32:57,683 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [311078762] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:57,683 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:57,684 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:57,684 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528231174]
[2023-11-06 22:32:57,685 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:57,692 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:57,692 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:57,699 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:57,700 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:57,702 INFO  L87              Difference]: Start difference. First operand 6599 states and 11013 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:58,015 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:58,015 INFO  L93              Difference]: Finished difference Result 12300 states and 20531 transitions.
[2023-11-06 22:32:58,016 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:58,018 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:32:58,021 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:58,034 INFO  L225             Difference]: With dead ends: 12300
[2023-11-06 22:32:58,035 INFO  L226             Difference]: Without dead ends: 6608
[2023-11-06 22:32:58,043 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:32:58,044 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:58,045 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:58,059 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6608 states.
[2023-11-06 22:32:58,192 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6600.
[2023-11-06 22:32:58,202 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6600 states, 6599 states have (on average 1.6690407637520837) internal successors, (11014), 6599 states have internal predecessors, (11014), 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 22:32:58,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 11014 transitions.
[2023-11-06 22:32:58,221 INFO  L78                 Accepts]: Start accepts. Automaton has 6600 states and 11014 transitions. Word has length 4276
[2023-11-06 22:32:58,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:58,224 INFO  L495      AbstractCegarLoop]: Abstraction has 6600 states and 11014 transitions.
[2023-11-06 22:32:58,225 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:32:58,226 INFO  L276                IsEmpty]: Start isEmpty. Operand 6600 states and 11014 transitions.
[2023-11-06 22:32:58,489 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:32:58,489 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:58,495 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:58,584 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:58,714 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:58,715 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:58,715 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:58,717 INFO  L85        PathProgramCache]: Analyzing trace with hash -1186472402, now seen corresponding path program 1 times
[2023-11-06 22:32:58,717 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:58,717 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123937260]
[2023-11-06 22:32:58,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:58,718 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:59,401 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:59,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601779545]
[2023-11-06 22:32:59,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:59,403 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:59,403 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:59,404 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:59,431 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:33:05,210 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:05,364 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17762 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:33:05,459 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:05,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:33:05,613 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:05,613 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:05,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123937260]
[2023-11-06 22:33:05,613 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:05,614 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601779545]
[2023-11-06 22:33:05,614 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [601779545] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:05,614 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:05,615 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:33:05,616 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824510683]
[2023-11-06 22:33:05,616 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:05,622 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:33:05,622 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:05,629 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:33:05,629 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:33:05,631 INFO  L87              Difference]: Start difference. First operand 6600 states and 11014 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:05,860 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:05,861 INFO  L93              Difference]: Finished difference Result 12302 states and 20533 transitions.
[2023-11-06 22:33:05,862 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:33:05,863 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:33:05,866 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:05,880 INFO  L225             Difference]: With dead ends: 12302
[2023-11-06 22:33:05,880 INFO  L226             Difference]: Without dead ends: 6609
[2023-11-06 22:33:05,889 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:33:05,891 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:05,891 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:05,903 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6609 states.
[2023-11-06 22:33:06,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6609 to 6601.
[2023-11-06 22:33:06,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6601 states, 6600 states have (on average 1.668939393939394) internal successors, (11015), 6600 states have internal predecessors, (11015), 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 22:33:06,128 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6601 states to 6601 states and 11015 transitions.
[2023-11-06 22:33:06,128 INFO  L78                 Accepts]: Start accepts. Automaton has 6601 states and 11015 transitions. Word has length 4276
[2023-11-06 22:33:06,131 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:06,131 INFO  L495      AbstractCegarLoop]: Abstraction has 6601 states and 11015 transitions.
[2023-11-06 22:33:06,132 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:06,132 INFO  L276                IsEmpty]: Start isEmpty. Operand 6601 states and 11015 transitions.
[2023-11-06 22:33:06,279 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:33:06,279 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:06,282 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:06,347 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:06,497 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:06,497 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:06,498 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:06,500 INFO  L85        PathProgramCache]: Analyzing trace with hash 558514428, now seen corresponding path program 1 times
[2023-11-06 22:33:06,500 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:06,500 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813938549]
[2023-11-06 22:33:06,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:06,503 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:06,901 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:06,902 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298586098]
[2023-11-06 22:33:06,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:06,903 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:06,903 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:06,904 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:06,929 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:33:12,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:12,585 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17763 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:33:12,648 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:12,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:33:12,951 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:12,951 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:12,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813938549]
[2023-11-06 22:33:12,952 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:12,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298586098]
[2023-11-06 22:33:12,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [298586098] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:12,952 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:12,953 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:33:12,953 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798208173]
[2023-11-06 22:33:12,954 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:12,958 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:33:12,958 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:12,964 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:33:12,964 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:33:12,966 INFO  L87              Difference]: Start difference. First operand 6601 states and 11015 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:13,148 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:13,148 INFO  L93              Difference]: Finished difference Result 12304 states and 20535 transitions.
[2023-11-06 22:33:13,149 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:33:13,150 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:33:13,157 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:13,169 INFO  L225             Difference]: With dead ends: 12304
[2023-11-06 22:33:13,169 INFO  L226             Difference]: Without dead ends: 6610
[2023-11-06 22:33:13,177 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:33:13,177 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:13,178 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:33:13,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6610 states.
[2023-11-06 22:33:13,275 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6602.
[2023-11-06 22:33:13,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6602 states, 6601 states have (on average 1.6688380548401758) internal successors, (11016), 6601 states have internal predecessors, (11016), 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 22:33:13,299 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6602 states to 6602 states and 11016 transitions.
[2023-11-06 22:33:13,299 INFO  L78                 Accepts]: Start accepts. Automaton has 6602 states and 11016 transitions. Word has length 4276
[2023-11-06 22:33:13,306 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:13,306 INFO  L495      AbstractCegarLoop]: Abstraction has 6602 states and 11016 transitions.
[2023-11-06 22:33:13,308 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:13,308 INFO  L276                IsEmpty]: Start isEmpty. Operand 6602 states and 11016 transitions.
[2023-11-06 22:33:13,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:33:13,465 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:13,469 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:13,535 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-06 22:33:13,689 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:13,690 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:13,690 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:13,692 INFO  L85        PathProgramCache]: Analyzing trace with hash 1915584622, now seen corresponding path program 1 times
[2023-11-06 22:33:13,693 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:13,693 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416510306]
[2023-11-06 22:33:13,694 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:13,694 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:14,239 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:14,240 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501875584]
[2023-11-06 22:33:14,241 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:14,241 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:14,242 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:14,260 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:14,287 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:33:20,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:20,131 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17764 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:33:20,192 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:20,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:33:20,356 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:20,356 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:20,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416510306]
[2023-11-06 22:33:20,356 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:20,356 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501875584]
[2023-11-06 22:33:20,357 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [501875584] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:20,357 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:20,358 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:33:20,358 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530000822]
[2023-11-06 22:33:20,359 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:20,364 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:33:20,365 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:20,371 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:33:20,372 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:33:20,375 INFO  L87              Difference]: Start difference. First operand 6602 states and 11016 transitions. Second operand  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:20,563 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:20,563 INFO  L93              Difference]: Finished difference Result 12306 states and 20537 transitions.
[2023-11-06 22:33:20,564 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:33:20,566 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 4276
[2023-11-06 22:33:20,575 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:20,587 INFO  L225             Difference]: With dead ends: 12306
[2023-11-06 22:33:20,587 INFO  L226             Difference]: Without dead ends: 6611
[2023-11-06 22:33:20,594 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4273 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 22:33:20,595 INFO  L413           NwaCegarLoop]: 9797 mSDtfsCounter, 12 mSDsluCounter, 19582 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:20,595 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29379 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:33:20,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6611 states.
[2023-11-06 22:33:20,696 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 6603.
[2023-11-06 22:33:20,705 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6603 states, 6602 states have (on average 1.6687367464404725) internal successors, (11017), 6602 states have internal predecessors, (11017), 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 22:33:20,721 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 11017 transitions.
[2023-11-06 22:33:20,721 INFO  L78                 Accepts]: Start accepts. Automaton has 6603 states and 11017 transitions. Word has length 4276
[2023-11-06 22:33:20,728 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:20,729 INFO  L495      AbstractCegarLoop]: Abstraction has 6603 states and 11017 transitions.
[2023-11-06 22:33:20,731 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1069.0) internal successors, (4276), 4 states have internal predecessors, (4276), 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 22:33:20,731 INFO  L276                IsEmpty]: Start isEmpty. Operand 6603 states and 11017 transitions.
[2023-11-06 22:33:21,023 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:33:21,023 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:21,029 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:21,097 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:21,256 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:21,257 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:21,258 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:21,260 INFO  L85        PathProgramCache]: Analyzing trace with hash 1593818592, now seen corresponding path program 1 times
[2023-11-06 22:33:21,260 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:21,260 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867603516]
[2023-11-06 22:33:21,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:21,261 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:21,763 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:21,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797764046]
[2023-11-06 22:33:21,765 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:21,766 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:21,766 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:21,767 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:21,789 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:33:27,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:27,874 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17765 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:27,966 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:28,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked.
[2023-11-06 22:33:28,629 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:28,629 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:28,630 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867603516]
[2023-11-06 22:33:28,630 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:28,630 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797764046]
[2023-11-06 22:33:28,630 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797764046] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:28,630 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:28,632 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:28,632 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085637598]
[2023-11-06 22:33:28,632 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:28,638 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:28,638 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:28,644 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:28,644 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:28,646 INFO  L87              Difference]: Start difference. First operand 6603 states and 11017 transitions. Second operand  has 7 states, 7 states have (on average 542.1428571428571) internal successors, (3795), 7 states have internal predecessors, (3795), 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 22:33:29,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:29,290 INFO  L93              Difference]: Finished difference Result 17992 states and 30027 transitions.
[2023-11-06 22:33:29,291 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:29,292 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.1428571428571) internal successors, (3795), 7 states have internal predecessors, (3795), 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 4276
[2023-11-06 22:33:29,299 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:29,319 INFO  L225             Difference]: With dead ends: 17992
[2023-11-06 22:33:29,320 INFO  L226             Difference]: Without dead ends: 12296
[2023-11-06 22:33:29,329 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4285 GetRequests, 4273 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:29,330 INFO  L413           NwaCegarLoop]: 10999 mSDtfsCounter, 27455 mSDsluCounter, 42773 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27455 SdHoareTripleChecker+Valid, 53772 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:29,331 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27455 Valid, 53772 Invalid, 46 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:29,350 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12296 states.
[2023-11-06 22:33:29,498 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12296 to 6603.
[2023-11-06 22:33:29,507 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6603 states, 6602 states have (on average 1.6687367464404725) internal successors, (11017), 6602 states have internal predecessors, (11017), 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 22:33:29,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 11017 transitions.
[2023-11-06 22:33:29,523 INFO  L78                 Accepts]: Start accepts. Automaton has 6603 states and 11017 transitions. Word has length 4276
[2023-11-06 22:33:29,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:29,527 INFO  L495      AbstractCegarLoop]: Abstraction has 6603 states and 11017 transitions.
[2023-11-06 22:33:29,529 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.1428571428571) internal successors, (3795), 7 states have internal predecessors, (3795), 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 22:33:29,529 INFO  L276                IsEmpty]: Start isEmpty. Operand 6603 states and 11017 transitions.
[2023-11-06 22:33:29,755 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4278
[2023-11-06 22:33:29,755 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:29,758 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:29,821 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:29,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:33:29,985 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:29,986 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:29,987 INFO  L85        PathProgramCache]: Analyzing trace with hash 2053033196, now seen corresponding path program 1 times
[2023-11-06 22:33:29,988 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:29,988 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410283417]
[2023-11-06 22:33:29,989 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:29,989 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:30,464 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:30,464 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949489649]
[2023-11-06 22:33:30,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:30,466 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:30,466 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:30,469 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:30,497 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:33:35,743 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:35,870 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17768 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:35,948 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:36,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2023-11-06 22:33:36,440 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:36,440 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:36,440 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410283417]
[2023-11-06 22:33:36,440 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:36,440 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949489649]
[2023-11-06 22:33:36,440 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [949489649] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:36,441 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:36,442 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:36,443 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164431282]
[2023-11-06 22:33:36,443 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:36,448 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:36,448 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:36,453 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:36,453 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:36,455 INFO  L87              Difference]: Start difference. First operand 6603 states and 11017 transitions. Second operand  has 7 states, 7 states have (on average 542.5714285714286) internal successors, (3798), 7 states have internal predecessors, (3798), 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 22:33:36,963 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:36,963 INFO  L93              Difference]: Finished difference Result 17994 states and 30029 transitions.
[2023-11-06 22:33:36,964 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:36,965 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.5714285714286) internal successors, (3798), 7 states have internal predecessors, (3798), 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 4277
[2023-11-06 22:33:36,971 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:36,995 INFO  L225             Difference]: With dead ends: 17994
[2023-11-06 22:33:36,996 INFO  L226             Difference]: Without dead ends: 12295
[2023-11-06 22:33:37,006 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4286 GetRequests, 4274 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:37,006 INFO  L413           NwaCegarLoop]: 10994 mSDtfsCounter, 27454 mSDsluCounter, 42757 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27454 SdHoareTripleChecker+Valid, 53751 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:37,007 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27454 Valid, 53751 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:37,024 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12295 states.
[2023-11-06 22:33:37,161 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 6605.
[2023-11-06 22:33:37,168 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6605 states, 6604 states have (on average 1.668534221683828) internal successors, (11019), 6604 states have internal predecessors, (11019), 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 22:33:37,183 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 11019 transitions.
[2023-11-06 22:33:37,183 INFO  L78                 Accepts]: Start accepts. Automaton has 6605 states and 11019 transitions. Word has length 4277
[2023-11-06 22:33:37,187 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:37,187 INFO  L495      AbstractCegarLoop]: Abstraction has 6605 states and 11019 transitions.
[2023-11-06 22:33:37,189 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.5714285714286) internal successors, (3798), 7 states have internal predecessors, (3798), 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 22:33:37,189 INFO  L276                IsEmpty]: Start isEmpty. Operand 6605 states and 11019 transitions.
[2023-11-06 22:33:37,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4279
[2023-11-06 22:33:37,412 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:37,415 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:37,468 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:37,637 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-06 22:33:37,637 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:37,638 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:37,639 INFO  L85        PathProgramCache]: Analyzing trace with hash -979279878, now seen corresponding path program 1 times
[2023-11-06 22:33:37,640 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:37,640 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557317525]
[2023-11-06 22:33:37,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:37,641 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:38,019 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:38,019 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264184213]
[2023-11-06 22:33:38,021 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:38,021 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:38,021 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:38,022 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:38,040 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:33:43,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:44,106 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17771 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:44,187 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:44,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked.
[2023-11-06 22:33:44,722 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:44,723 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:44,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557317525]
[2023-11-06 22:33:44,723 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:44,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264184213]
[2023-11-06 22:33:44,723 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [264184213] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:44,723 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:44,724 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:44,725 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288534323]
[2023-11-06 22:33:44,725 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:44,730 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:44,730 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:44,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:44,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:44,736 INFO  L87              Difference]: Start difference. First operand 6605 states and 11019 transitions. Second operand  has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 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 22:33:45,229 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:45,229 INFO  L93              Difference]: Finished difference Result 18000 states and 30035 transitions.
[2023-11-06 22:33:45,230 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:45,231 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 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 4278
[2023-11-06 22:33:45,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:45,252 INFO  L225             Difference]: With dead ends: 18000
[2023-11-06 22:33:45,252 INFO  L226             Difference]: Without dead ends: 12296
[2023-11-06 22:33:45,260 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4287 GetRequests, 4275 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:45,260 INFO  L413           NwaCegarLoop]: 10989 mSDtfsCounter, 27453 mSDsluCounter, 42742 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27453 SdHoareTripleChecker+Valid, 53731 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:45,261 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27453 Valid, 53731 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:45,276 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12296 states.
[2023-11-06 22:33:45,410 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12296 to 6607.
[2023-11-06 22:33:45,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6607 states, 6606 states have (on average 1.6683318195579775) internal successors, (11021), 6606 states have internal predecessors, (11021), 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 22:33:45,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 11021 transitions.
[2023-11-06 22:33:45,433 INFO  L78                 Accepts]: Start accepts. Automaton has 6607 states and 11021 transitions. Word has length 4278
[2023-11-06 22:33:45,437 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:45,437 INFO  L495      AbstractCegarLoop]: Abstraction has 6607 states and 11021 transitions.
[2023-11-06 22:33:45,438 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 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 22:33:45,439 INFO  L276                IsEmpty]: Start isEmpty. Operand 6607 states and 11021 transitions.
[2023-11-06 22:33:45,662 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4280
[2023-11-06 22:33:45,662 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:45,665 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:45,731 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:45,887 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 22:33:45,888 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:45,888 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:45,890 INFO  L85        PathProgramCache]: Analyzing trace with hash -752914478, now seen corresponding path program 1 times
[2023-11-06 22:33:45,890 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:45,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780979553]
[2023-11-06 22:33:45,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:45,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:46,305 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:46,305 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431420945]
[2023-11-06 22:33:46,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:46,307 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:46,307 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:46,308 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:46,329 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 22:33:52,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:52,482 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17774 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:52,554 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:53,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked.
[2023-11-06 22:33:53,119 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:53,120 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:53,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780979553]
[2023-11-06 22:33:53,120 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:53,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431420945]
[2023-11-06 22:33:53,120 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [431420945] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:53,121 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:53,122 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:53,122 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104744423]
[2023-11-06 22:33:53,123 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:53,129 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:53,129 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:53,135 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:53,136 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:53,137 INFO  L87              Difference]: Start difference. First operand 6607 states and 11021 transitions. Second operand  has 7 states, 7 states have (on average 543.4285714285714) internal successors, (3804), 7 states have internal predecessors, (3804), 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 22:33:53,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:53,658 INFO  L93              Difference]: Finished difference Result 18006 states and 30041 transitions.
[2023-11-06 22:33:53,658 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:53,660 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 543.4285714285714) internal successors, (3804), 7 states have internal predecessors, (3804), 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 4279
[2023-11-06 22:33:53,663 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:53,683 INFO  L225             Difference]: With dead ends: 18006
[2023-11-06 22:33:53,683 INFO  L226             Difference]: Without dead ends: 12297
[2023-11-06 22:33:53,763 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4288 GetRequests, 4276 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:53,764 INFO  L413           NwaCegarLoop]: 10984 mSDtfsCounter, 27452 mSDsluCounter, 42727 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27452 SdHoareTripleChecker+Valid, 53711 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:53,764 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27452 Valid, 53711 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:53,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12297 states.
[2023-11-06 22:33:53,867 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12297 to 6609.
[2023-11-06 22:33:53,874 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6609 states, 6608 states have (on average 1.6681295399515739) internal successors, (11023), 6608 states have internal predecessors, (11023), 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 22:33:53,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 11023 transitions.
[2023-11-06 22:33:53,887 INFO  L78                 Accepts]: Start accepts. Automaton has 6609 states and 11023 transitions. Word has length 4279
[2023-11-06 22:33:53,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:53,890 INFO  L495      AbstractCegarLoop]: Abstraction has 6609 states and 11023 transitions.
[2023-11-06 22:33:53,891 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 543.4285714285714) internal successors, (3804), 7 states have internal predecessors, (3804), 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 22:33:53,891 INFO  L276                IsEmpty]: Start isEmpty. Operand 6609 states and 11023 transitions.
[2023-11-06 22:33:54,021 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4281
[2023-11-06 22:33:54,022 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:54,025 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:54,082 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:54,244 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 22:33:54,245 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:54,245 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:54,246 INFO  L85        PathProgramCache]: Analyzing trace with hash 1059554198, now seen corresponding path program 1 times
[2023-11-06 22:33:54,247 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:54,247 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726697765]
[2023-11-06 22:33:54,247 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:54,247 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:54,649 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:54,649 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212173149]
[2023-11-06 22:33:54,650 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:54,651 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:54,651 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:54,653 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:54,679 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 22:33:59,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:59,929 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17778 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:59,987 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:00,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked.
[2023-11-06 22:34:00,241 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:00,242 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:00,242 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726697765]
[2023-11-06 22:34:00,242 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:00,242 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212173149]
[2023-11-06 22:34:00,242 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [212173149] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:00,242 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:00,243 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:00,244 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639223949]
[2023-11-06 22:34:00,244 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:00,249 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:00,249 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:00,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:00,254 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:00,255 INFO  L87              Difference]: Start difference. First operand 6609 states and 11023 transitions. Second operand  has 7 states, 7 states have (on average 543.8571428571429) internal successors, (3807), 7 states have internal predecessors, (3807), 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 22:34:00,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:00,755 INFO  L93              Difference]: Finished difference Result 18012 states and 30047 transitions.
[2023-11-06 22:34:00,755 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:00,756 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 543.8571428571429) internal successors, (3807), 7 states have internal predecessors, (3807), 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 4280
[2023-11-06 22:34:00,759 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:00,783 INFO  L225             Difference]: With dead ends: 18012
[2023-11-06 22:34:00,783 INFO  L226             Difference]: Without dead ends: 12298
[2023-11-06 22:34:00,790 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4289 GetRequests, 4277 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:00,790 INFO  L413           NwaCegarLoop]: 10979 mSDtfsCounter, 27451 mSDsluCounter, 42712 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27451 SdHoareTripleChecker+Valid, 53691 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:00,791 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27451 Valid, 53691 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:00,803 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12298 states.
[2023-11-06 22:34:00,895 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12298 to 6611.
[2023-11-06 22:34:00,902 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6611 states, 6610 states have (on average 1.667927382753404) internal successors, (11025), 6610 states have internal predecessors, (11025), 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 22:34:00,913 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 11025 transitions.
[2023-11-06 22:34:00,913 INFO  L78                 Accepts]: Start accepts. Automaton has 6611 states and 11025 transitions. Word has length 4280
[2023-11-06 22:34:00,916 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:00,916 INFO  L495      AbstractCegarLoop]: Abstraction has 6611 states and 11025 transitions.
[2023-11-06 22:34:00,917 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 543.8571428571429) internal successors, (3807), 7 states have internal predecessors, (3807), 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 22:34:00,917 INFO  L276                IsEmpty]: Start isEmpty. Operand 6611 states and 11025 transitions.
[2023-11-06 22:34:01,045 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4282
[2023-11-06 22:34:01,045 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:01,048 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:01,117 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:01,265 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 22:34:01,265 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:01,266 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:01,267 INFO  L85        PathProgramCache]: Analyzing trace with hash 973375546, now seen corresponding path program 1 times
[2023-11-06 22:34:01,268 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:01,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835243695]
[2023-11-06 22:34:01,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:01,269 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:01,669 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:01,670 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444757646]
[2023-11-06 22:34:01,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:01,671 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:01,671 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:01,672 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:01,697 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 22:34:06,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:07,010 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17781 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:07,073 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:07,321 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked.
[2023-11-06 22:34:07,322 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:07,322 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:07,322 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835243695]
[2023-11-06 22:34:07,322 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:07,323 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444757646]
[2023-11-06 22:34:07,323 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [444757646] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:07,323 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:07,324 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:07,324 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347367660]
[2023-11-06 22:34:07,324 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:07,330 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:07,330 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:07,335 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:07,335 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:07,336 INFO  L87              Difference]: Start difference. First operand 6611 states and 11025 transitions. Second operand  has 7 states, 7 states have (on average 544.2857142857143) internal successors, (3810), 7 states have internal predecessors, (3810), 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 22:34:07,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:07,739 INFO  L93              Difference]: Finished difference Result 18018 states and 30053 transitions.
[2023-11-06 22:34:07,739 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:07,740 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.2857142857143) internal successors, (3810), 7 states have internal predecessors, (3810), 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 4281
[2023-11-06 22:34:07,743 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:07,756 INFO  L225             Difference]: With dead ends: 18018
[2023-11-06 22:34:07,757 INFO  L226             Difference]: Without dead ends: 12299
[2023-11-06 22:34:07,763 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4290 GetRequests, 4278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:07,764 INFO  L413           NwaCegarLoop]: 10974 mSDtfsCounter, 27450 mSDsluCounter, 42697 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27450 SdHoareTripleChecker+Valid, 53671 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:07,764 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27450 Valid, 53671 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:07,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12299 states.
[2023-11-06 22:34:07,868 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 6613.
[2023-11-06 22:34:07,875 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6613 states, 6612 states have (on average 1.6677253478523897) internal successors, (11027), 6612 states have internal predecessors, (11027), 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 22:34:07,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6613 states to 6613 states and 11027 transitions.
[2023-11-06 22:34:07,886 INFO  L78                 Accepts]: Start accepts. Automaton has 6613 states and 11027 transitions. Word has length 4281
[2023-11-06 22:34:07,889 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:07,889 INFO  L495      AbstractCegarLoop]: Abstraction has 6613 states and 11027 transitions.
[2023-11-06 22:34:07,890 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.2857142857143) internal successors, (3810), 7 states have internal predecessors, (3810), 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 22:34:07,891 INFO  L276                IsEmpty]: Start isEmpty. Operand 6613 states and 11027 transitions.
[2023-11-06 22:34:08,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4283
[2023-11-06 22:34:08,176 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:08,179 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:08,234 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:08,401 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 22:34:08,401 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:08,402 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:08,403 INFO  L85        PathProgramCache]: Analyzing trace with hash 783925680, now seen corresponding path program 1 times
[2023-11-06 22:34:08,403 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:08,403 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447229408]
[2023-11-06 22:34:08,404 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:08,404 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:08,804 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:08,804 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755841635]
[2023-11-06 22:34:08,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:08,805 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:08,805 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:08,806 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:08,807 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 22:34:13,967 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:14,091 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17784 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:14,154 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:14,582 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked.
[2023-11-06 22:34:14,582 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:14,582 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:14,582 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447229408]
[2023-11-06 22:34:14,582 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:14,582 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755841635]
[2023-11-06 22:34:14,582 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [755841635] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:14,582 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:14,584 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:14,584 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203632884]
[2023-11-06 22:34:14,584 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:14,590 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:14,590 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:14,595 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:14,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:14,597 INFO  L87              Difference]: Start difference. First operand 6613 states and 11027 transitions. Second operand  has 7 states, 7 states have (on average 544.7142857142857) internal successors, (3813), 7 states have internal predecessors, (3813), 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 22:34:15,008 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:15,008 INFO  L93              Difference]: Finished difference Result 18024 states and 30059 transitions.
[2023-11-06 22:34:15,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:15,009 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.7142857142857) internal successors, (3813), 7 states have internal predecessors, (3813), 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 4282
[2023-11-06 22:34:15,012 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:15,023 INFO  L225             Difference]: With dead ends: 18024
[2023-11-06 22:34:15,023 INFO  L226             Difference]: Without dead ends: 12300
[2023-11-06 22:34:15,029 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4291 GetRequests, 4279 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:15,030 INFO  L413           NwaCegarLoop]: 10969 mSDtfsCounter, 27449 mSDsluCounter, 42682 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27449 SdHoareTripleChecker+Valid, 53651 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:15,030 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27449 Valid, 53651 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:15,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12300 states.
[2023-11-06 22:34:15,127 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 6615.
[2023-11-06 22:34:15,134 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6615 states, 6614 states have (on average 1.667523435137587) internal successors, (11029), 6614 states have internal predecessors, (11029), 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 22:34:15,151 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 11029 transitions.
[2023-11-06 22:34:15,152 INFO  L78                 Accepts]: Start accepts. Automaton has 6615 states and 11029 transitions. Word has length 4282
[2023-11-06 22:34:15,155 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:15,155 INFO  L495      AbstractCegarLoop]: Abstraction has 6615 states and 11029 transitions.
[2023-11-06 22:34:15,157 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.7142857142857) internal successors, (3813), 7 states have internal predecessors, (3813), 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 22:34:15,157 INFO  L276                IsEmpty]: Start isEmpty. Operand 6615 states and 11029 transitions.
[2023-11-06 22:34:15,318 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4284
[2023-11-06 22:34:15,319 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:15,321 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:15,381 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:15,545 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 22:34:15,545 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:15,546 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:15,547 INFO  L85        PathProgramCache]: Analyzing trace with hash 942894880, now seen corresponding path program 1 times
[2023-11-06 22:34:15,547 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:15,548 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863805311]
[2023-11-06 22:34:15,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:15,549 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:15,922 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:15,922 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263869570]
[2023-11-06 22:34:15,923 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:15,923 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:15,923 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:15,925 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:15,927 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 22:34:21,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:22,033 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17787 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:34:22,095 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:22,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked.
[2023-11-06 22:34:22,385 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:22,386 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:22,386 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863805311]
[2023-11-06 22:34:22,386 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:22,386 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263869570]
[2023-11-06 22:34:22,386 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263869570] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:22,387 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:22,388 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:34:22,388 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423091667]
[2023-11-06 22:34:22,388 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:22,393 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:34:22,393 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:22,396 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:34:22,397 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:34:22,398 INFO  L87              Difference]: Start difference. First operand 6615 states and 11029 transitions. Second operand  has 8 states, 8 states have (on average 477.0) internal successors, (3816), 8 states have internal predecessors, (3816), 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 22:34:23,124 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:23,124 INFO  L93              Difference]: Finished difference Result 18030 states and 30065 transitions.
[2023-11-06 22:34:23,125 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:23,126 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 477.0) internal successors, (3816), 8 states have internal predecessors, (3816), 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 4283
[2023-11-06 22:34:23,130 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:23,139 INFO  L225             Difference]: With dead ends: 18030
[2023-11-06 22:34:23,139 INFO  L226             Difference]: Without dead ends: 12301
[2023-11-06 22:34:23,143 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4292 GetRequests, 4279 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:34:23,144 INFO  L413           NwaCegarLoop]: 10964 mSDtfsCounter, 27448 mSDsluCounter, 52131 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27448 SdHoareTripleChecker+Valid, 63095 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:23,144 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27448 Valid, 63095 Invalid, 53 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:23,157 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12301 states.
[2023-11-06 22:34:23,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 6617.
[2023-11-06 22:34:23,246 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6617 states, 6616 states have (on average 1.6673216444981862) internal successors, (11031), 6616 states have internal predecessors, (11031), 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 22:34:23,260 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 11031 transitions.
[2023-11-06 22:34:23,260 INFO  L78                 Accepts]: Start accepts. Automaton has 6617 states and 11031 transitions. Word has length 4283
[2023-11-06 22:34:23,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:23,264 INFO  L495      AbstractCegarLoop]: Abstraction has 6617 states and 11031 transitions.
[2023-11-06 22:34:23,264 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 477.0) internal successors, (3816), 8 states have internal predecessors, (3816), 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 22:34:23,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 6617 states and 11031 transitions.
[2023-11-06 22:34:23,389 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4285
[2023-11-06 22:34:23,389 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:23,391 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:23,456 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:23,605 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-06 22:34:23,606 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:23,606 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:23,608 INFO  L85        PathProgramCache]: Analyzing trace with hash 1922010700, now seen corresponding path program 1 times
[2023-11-06 22:34:23,608 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:23,608 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724949801]
[2023-11-06 22:34:23,609 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:23,609 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:24,104 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:24,105 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806994071]
[2023-11-06 22:34:24,106 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:24,106 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:24,107 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:24,108 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:24,125 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 22:34:29,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:30,095 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17791 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:30,158 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:30,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked.
[2023-11-06 22:34:30,451 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:30,451 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:30,451 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724949801]
[2023-11-06 22:34:30,451 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:30,451 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806994071]
[2023-11-06 22:34:30,452 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [806994071] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:30,452 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:30,453 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:30,453 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110896079]
[2023-11-06 22:34:30,453 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:30,457 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:30,457 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:30,462 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:30,462 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:30,463 INFO  L87              Difference]: Start difference. First operand 6617 states and 11031 transitions. Second operand  has 7 states, 7 states have (on average 545.5714285714286) internal successors, (3819), 7 states have internal predecessors, (3819), 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 22:34:30,940 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:30,940 INFO  L93              Difference]: Finished difference Result 18036 states and 30071 transitions.
[2023-11-06 22:34:30,940 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:30,941 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 545.5714285714286) internal successors, (3819), 7 states have internal predecessors, (3819), 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 4284
[2023-11-06 22:34:30,945 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:30,954 INFO  L225             Difference]: With dead ends: 18036
[2023-11-06 22:34:30,954 INFO  L226             Difference]: Without dead ends: 12302
[2023-11-06 22:34:30,959 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4293 GetRequests, 4281 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:30,960 INFO  L413           NwaCegarLoop]: 10959 mSDtfsCounter, 27447 mSDsluCounter, 42652 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27447 SdHoareTripleChecker+Valid, 53611 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:30,960 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27447 Valid, 53611 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:30,972 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12302 states.
[2023-11-06 22:34:31,056 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12302 to 6619.
[2023-11-06 22:34:31,061 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6619 states, 6618 states have (on average 1.6671199758235116) internal successors, (11033), 6618 states have internal predecessors, (11033), 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 22:34:31,069 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 11033 transitions.
[2023-11-06 22:34:31,069 INFO  L78                 Accepts]: Start accepts. Automaton has 6619 states and 11033 transitions. Word has length 4284
[2023-11-06 22:34:31,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:31,071 INFO  L495      AbstractCegarLoop]: Abstraction has 6619 states and 11033 transitions.
[2023-11-06 22:34:31,072 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 545.5714285714286) internal successors, (3819), 7 states have internal predecessors, (3819), 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 22:34:31,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 6619 states and 11033 transitions.
[2023-11-06 22:34:31,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4286
[2023-11-06 22:34:31,167 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:31,169 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:31,222 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:31,371 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 22:34:31,371 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:31,372 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:31,373 INFO  L85        PathProgramCache]: Analyzing trace with hash 778131592, now seen corresponding path program 1 times
[2023-11-06 22:34:31,373 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:31,373 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361076232]
[2023-11-06 22:34:31,374 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:31,375 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:31,735 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:31,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172594847]
[2023-11-06 22:34:31,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:31,737 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:31,737 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:31,741 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:31,757 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 22:34:36,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:36,827 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17794 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:36,874 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:37,123 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked.
[2023-11-06 22:34:37,123 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:37,123 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:37,124 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361076232]
[2023-11-06 22:34:37,124 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:37,124 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172594847]
[2023-11-06 22:34:37,124 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [172594847] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:37,124 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:37,125 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:37,125 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304905878]
[2023-11-06 22:34:37,125 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:37,128 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:37,129 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:37,132 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:37,133 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:37,134 INFO  L87              Difference]: Start difference. First operand 6619 states and 11033 transitions. Second operand  has 7 states, 7 states have (on average 546.0) internal successors, (3822), 7 states have internal predecessors, (3822), 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 22:34:37,588 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:37,588 INFO  L93              Difference]: Finished difference Result 18042 states and 30077 transitions.
[2023-11-06 22:34:37,588 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:37,589 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 546.0) internal successors, (3822), 7 states have internal predecessors, (3822), 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 4285
[2023-11-06 22:34:37,592 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:37,600 INFO  L225             Difference]: With dead ends: 18042
[2023-11-06 22:34:37,600 INFO  L226             Difference]: Without dead ends: 12303
[2023-11-06 22:34:37,604 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4294 GetRequests, 4282 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:37,605 INFO  L413           NwaCegarLoop]: 10954 mSDtfsCounter, 27446 mSDsluCounter, 42637 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27446 SdHoareTripleChecker+Valid, 53591 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:37,605 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27446 Valid, 53591 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:37,614 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12303 states.
[2023-11-06 22:34:37,697 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12303 to 6621.
[2023-11-06 22:34:37,704 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6621 states, 6620 states have (on average 1.6669184290030212) internal successors, (11035), 6620 states have internal predecessors, (11035), 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 22:34:37,715 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 11035 transitions.
[2023-11-06 22:34:37,715 INFO  L78                 Accepts]: Start accepts. Automaton has 6621 states and 11035 transitions. Word has length 4285
[2023-11-06 22:34:37,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:37,718 INFO  L495      AbstractCegarLoop]: Abstraction has 6621 states and 11035 transitions.
[2023-11-06 22:34:37,719 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 546.0) internal successors, (3822), 7 states have internal predecessors, (3822), 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 22:34:37,719 INFO  L276                IsEmpty]: Start isEmpty. Operand 6621 states and 11035 transitions.
[2023-11-06 22:34:37,832 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4287
[2023-11-06 22:34:37,833 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:37,834 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:37,883 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:38,034 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:38,035 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:38,035 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:38,035 INFO  L85        PathProgramCache]: Analyzing trace with hash 425125990, now seen corresponding path program 1 times
[2023-11-06 22:34:38,036 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:38,036 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765794622]
[2023-11-06 22:34:38,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:38,036 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:38,387 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:38,388 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518053440]
[2023-11-06 22:34:38,389 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:38,389 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:38,389 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:38,391 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:38,402 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 22:34:43,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:43,739 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17797 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:43,792 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:44,040 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2023-11-06 22:34:44,041 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:44,041 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:44,041 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765794622]
[2023-11-06 22:34:44,041 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:44,041 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518053440]
[2023-11-06 22:34:44,041 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [518053440] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:44,041 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:44,043 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:44,043 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195418295]
[2023-11-06 22:34:44,043 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:44,046 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:44,046 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:44,050 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:44,050 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:44,051 INFO  L87              Difference]: Start difference. First operand 6621 states and 11035 transitions. Second operand  has 7 states, 7 states have (on average 546.4285714285714) internal successors, (3825), 7 states have internal predecessors, (3825), 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 22:34:44,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:44,479 INFO  L93              Difference]: Finished difference Result 18048 states and 30083 transitions.
[2023-11-06 22:34:44,480 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:44,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 546.4285714285714) internal successors, (3825), 7 states have internal predecessors, (3825), 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 4286
[2023-11-06 22:34:44,484 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:44,497 INFO  L225             Difference]: With dead ends: 18048
[2023-11-06 22:34:44,497 INFO  L226             Difference]: Without dead ends: 12304
[2023-11-06 22:34:44,504 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4295 GetRequests, 4283 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:44,505 INFO  L413           NwaCegarLoop]: 10949 mSDtfsCounter, 27445 mSDsluCounter, 42622 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27445 SdHoareTripleChecker+Valid, 53571 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:44,506 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27445 Valid, 53571 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:44,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12304 states.
[2023-11-06 22:34:44,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 6623.
[2023-11-06 22:34:44,609 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6623 states, 6622 states have (on average 1.6667170039263062) internal successors, (11037), 6622 states have internal predecessors, (11037), 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 22:34:44,617 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 11037 transitions.
[2023-11-06 22:34:44,617 INFO  L78                 Accepts]: Start accepts. Automaton has 6623 states and 11037 transitions. Word has length 4286
[2023-11-06 22:34:44,619 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:44,619 INFO  L495      AbstractCegarLoop]: Abstraction has 6623 states and 11037 transitions.
[2023-11-06 22:34:44,620 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 546.4285714285714) internal successors, (3825), 7 states have internal predecessors, (3825), 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 22:34:44,621 INFO  L276                IsEmpty]: Start isEmpty. Operand 6623 states and 11037 transitions.
[2023-11-06 22:34:44,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4288
[2023-11-06 22:34:44,823 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:44,825 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:44,885 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:45,041 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:45,041 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:45,042 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:45,042 INFO  L85        PathProgramCache]: Analyzing trace with hash 1983513454, now seen corresponding path program 1 times
[2023-11-06 22:34:45,042 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:45,042 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194467539]
[2023-11-06 22:34:45,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:45,043 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:45,390 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:45,390 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670536106]
[2023-11-06 22:34:45,391 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:45,392 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:45,392 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:45,393 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:45,397 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-06 22:34:50,557 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:50,676 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17800 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:50,729 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:51,192 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked.
[2023-11-06 22:34:51,192 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:51,192 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:51,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194467539]
[2023-11-06 22:34:51,192 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:51,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670536106]
[2023-11-06 22:34:51,192 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670536106] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:51,193 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:51,194 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:51,194 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830613208]
[2023-11-06 22:34:51,194 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:51,197 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:51,197 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:51,200 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:51,200 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:51,201 INFO  L87              Difference]: Start difference. First operand 6623 states and 11037 transitions. Second operand  has 7 states, 7 states have (on average 546.8571428571429) internal successors, (3828), 7 states have internal predecessors, (3828), 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 22:34:51,599 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:51,599 INFO  L93              Difference]: Finished difference Result 18054 states and 30089 transitions.
[2023-11-06 22:34:51,600 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:51,601 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 546.8571428571429) internal successors, (3828), 7 states have internal predecessors, (3828), 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 4287
[2023-11-06 22:34:51,604 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:51,615 INFO  L225             Difference]: With dead ends: 18054
[2023-11-06 22:34:51,615 INFO  L226             Difference]: Without dead ends: 12305
[2023-11-06 22:34:51,620 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4296 GetRequests, 4284 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:51,621 INFO  L413           NwaCegarLoop]: 10944 mSDtfsCounter, 27444 mSDsluCounter, 42607 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27444 SdHoareTripleChecker+Valid, 53551 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:51,622 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27444 Valid, 53551 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:51,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12305 states.
[2023-11-06 22:34:51,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 6625.
[2023-11-06 22:34:51,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6625 states, 6624 states have (on average 1.6665157004830917) internal successors, (11039), 6624 states have internal predecessors, (11039), 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 22:34:51,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 11039 transitions.
[2023-11-06 22:34:51,724 INFO  L78                 Accepts]: Start accepts. Automaton has 6625 states and 11039 transitions. Word has length 4287
[2023-11-06 22:34:51,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:51,727 INFO  L495      AbstractCegarLoop]: Abstraction has 6625 states and 11039 transitions.
[2023-11-06 22:34:51,729 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 546.8571428571429) internal successors, (3828), 7 states have internal predecessors, (3828), 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 22:34:51,729 INFO  L276                IsEmpty]: Start isEmpty. Operand 6625 states and 11039 transitions.
[2023-11-06 22:34:51,815 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4289
[2023-11-06 22:34:51,815 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:51,816 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:51,871 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-06 22:34:52,016 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-06 22:34:52,017 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:52,017 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:52,018 INFO  L85        PathProgramCache]: Analyzing trace with hash -1930076670, now seen corresponding path program 1 times
[2023-11-06 22:34:52,018 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:52,018 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143851505]
[2023-11-06 22:34:52,019 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:52,019 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:52,367 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:52,367 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785766366]
[2023-11-06 22:34:52,369 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:52,369 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:52,369 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:52,370 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:52,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-06 22:34:57,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:57,652 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17804 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:57,705 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:57,958 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked.
[2023-11-06 22:34:57,958 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:57,958 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:57,958 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143851505]
[2023-11-06 22:34:57,958 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:57,959 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785766366]
[2023-11-06 22:34:57,959 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785766366] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:57,959 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:57,960 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:57,960 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565293572]
[2023-11-06 22:34:57,960 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:57,962 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:57,962 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:57,965 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:57,965 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:57,966 INFO  L87              Difference]: Start difference. First operand 6625 states and 11039 transitions. Second operand  has 7 states, 7 states have (on average 547.2857142857143) internal successors, (3831), 7 states have internal predecessors, (3831), 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 22:34:58,366 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:58,368 INFO  L93              Difference]: Finished difference Result 18060 states and 30095 transitions.
[2023-11-06 22:34:58,368 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:58,369 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 547.2857142857143) internal successors, (3831), 7 states have internal predecessors, (3831), 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 4288
[2023-11-06 22:34:58,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:58,383 INFO  L225             Difference]: With dead ends: 18060
[2023-11-06 22:34:58,383 INFO  L226             Difference]: Without dead ends: 12306
[2023-11-06 22:34:58,388 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4297 GetRequests, 4285 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:58,389 INFO  L413           NwaCegarLoop]: 10939 mSDtfsCounter, 27443 mSDsluCounter, 42592 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27443 SdHoareTripleChecker+Valid, 53531 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:58,389 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27443 Valid, 53531 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:58,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12306 states.
[2023-11-06 22:34:58,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12306 to 6627.
[2023-11-06 22:34:58,481 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6627 states, 6626 states have (on average 1.6663145185632358) internal successors, (11041), 6626 states have internal predecessors, (11041), 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 22:34:58,491 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 11041 transitions.
[2023-11-06 22:34:58,491 INFO  L78                 Accepts]: Start accepts. Automaton has 6627 states and 11041 transitions. Word has length 4288
[2023-11-06 22:34:58,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:58,493 INFO  L495      AbstractCegarLoop]: Abstraction has 6627 states and 11041 transitions.
[2023-11-06 22:34:58,494 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 547.2857142857143) internal successors, (3831), 7 states have internal predecessors, (3831), 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 22:34:58,494 INFO  L276                IsEmpty]: Start isEmpty. Operand 6627 states and 11041 transitions.
[2023-11-06 22:34:58,639 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4290
[2023-11-06 22:34:58,639 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:58,640 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:58,689 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:58,841 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:58,841 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:58,841 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:58,842 INFO  L85        PathProgramCache]: Analyzing trace with hash -115294762, now seen corresponding path program 1 times
[2023-11-06 22:34:58,843 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:58,843 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221217154]
[2023-11-06 22:34:58,844 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:58,844 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:59,165 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:59,166 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120929083]
[2023-11-06 22:34:59,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:59,167 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:59,167 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:59,168 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:59,185 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-06 22:35:04,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:35:04,289 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17807 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:35:04,341 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:35:04,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked.
[2023-11-06 22:35:04,580 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:35:04,581 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:35:04,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221217154]
[2023-11-06 22:35:04,581 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:35:04,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120929083]
[2023-11-06 22:35:04,581 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120929083] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:35:04,581 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:35:04,582 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:35:04,582 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013387379]
[2023-11-06 22:35:04,583 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:35:04,586 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:35:04,586 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:35:04,589 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:35:04,589 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:35:04,590 INFO  L87              Difference]: Start difference. First operand 6627 states and 11041 transitions. Second operand  has 7 states, 7 states have (on average 547.7142857142857) internal successors, (3834), 7 states have internal predecessors, (3834), 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 22:35:05,076 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:35:05,076 INFO  L93              Difference]: Finished difference Result 18066 states and 30101 transitions.
[2023-11-06 22:35:05,076 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:35:05,077 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 547.7142857142857) internal successors, (3834), 7 states have internal predecessors, (3834), 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 4289
[2023-11-06 22:35:05,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:35:05,087 INFO  L225             Difference]: With dead ends: 18066
[2023-11-06 22:35:05,088 INFO  L226             Difference]: Without dead ends: 12307
[2023-11-06 22:35:05,091 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4298 GetRequests, 4286 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:35:05,091 INFO  L413           NwaCegarLoop]: 10934 mSDtfsCounter, 27442 mSDsluCounter, 42577 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27442 SdHoareTripleChecker+Valid, 53511 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:35:05,092 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27442 Valid, 53511 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:35:05,101 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12307 states.
[2023-11-06 22:35:05,166 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12307 to 6629.
[2023-11-06 22:35:05,171 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6629 states, 6628 states have (on average 1.666113458056729) internal successors, (11043), 6628 states have internal predecessors, (11043), 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 22:35:05,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 11043 transitions.
[2023-11-06 22:35:05,180 INFO  L78                 Accepts]: Start accepts. Automaton has 6629 states and 11043 transitions. Word has length 4289
[2023-11-06 22:35:05,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:35:05,182 INFO  L495      AbstractCegarLoop]: Abstraction has 6629 states and 11043 transitions.
[2023-11-06 22:35:05,183 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 547.7142857142857) internal successors, (3834), 7 states have internal predecessors, (3834), 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 22:35:05,183 INFO  L276                IsEmpty]: Start isEmpty. Operand 6629 states and 11043 transitions.
[2023-11-06 22:35:05,264 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4291
[2023-11-06 22:35:05,264 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:35:05,265 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:35:05,319 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-06 22:35:05,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:35:05,466 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:35:05,466 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:35:05,468 INFO  L85        PathProgramCache]: Analyzing trace with hash -1959373796, now seen corresponding path program 1 times
[2023-11-06 22:35:05,468 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:35:05,468 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578380569]
[2023-11-06 22:35:05,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:35:05,469 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:35:05,828 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:35:05,829 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790259214]
[2023-11-06 22:35:05,830 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:35:05,831 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:35:05,831 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:35:05,832 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:35:05,853 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0a2ca-4caf-45ca-8a5c-57db33cc7e6d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process